Algae oil

I've been reading about biodiesel and about using vegitable oil from algae. It would seem that per acre you can produce 250 times as much vegitable oil using algae than soy beans. I've been looking into the necessary parts for a very small scale demonstration project, including production, harvesting, drying and converting oil into diesel, but I'm having problems finding information of oil extraction. There are some very large oil extractors using screw and expeller. Even a very small one would cost several thousand dollars and since it is made for seeds I'm not sure it would work with algae. Does anyone here know about oil extraction process and how it can be scaled down and used with algae? The system I envision would only take the first pass in extracting oil, about 70%. From what I've been reading it is possible to get another 25% but requires some very nasty chemicals. Also, taking only that first press, the leftovers (refered to as "oil cake") makes for an excellent animal feed. After extracting that last 25% the leftovers are no longer suitable because of the toxic chemicals used. I'd rather have the 70% and animal feed and not have to bother with some very elaborate procedures for handling toxic chemicals. Anyone else interested in helping to put together a demo project like this? I already have resources on converting voil to biodiesel. Like I said, I'm mostly looking for information on extracting the oil. Thanks

Topic by GlobalVillageIdiot   |  last reply


is algae good for garding?

Question by nmhbhe73   |  last reply


White mold on algae?

Recently (as in for a few weeks), my bowl of algae has developed white goop floating in it. It looks like flour, and sticks together like flour. I (intelligently, I believe) have not tasted it, but it or something else in the algae smells terrible (well, worse than how terrible algae already smells, lol). I'm worried because Im donating samples of this algae to my middle school to use for experimentation, but a few, um, white things got in the samples. I really want to know what this stuff is. If anyone wants pictures, I'll upload some,. but basically it looks like flour and floats on top of the algae.

Question by Rotten194   |  last reply



what would be the best way to remove the algae from the water and dry it?

I just recently made myself a recycled bottle bio reactor to grow algae in, and now I'm wondering what the easiest way would be for me to separate out some of the algae and dry it. I'm hoping to be able to get something fairly dry and dense without having to bake it. Any ideas would be greatly appreciated.

Question by gleipnir   |  last reply


Do anyone have any information on growing and processing algae at home for bio fuel??

I have  been researching online  ways to  produce  bio fuel from algae at home. I have found  numerous ideas and was  wondering   if anyone has  tried to actual   put  it to work? I have been looking at what scale a person would need to produce 75 Gallon a month . I have seen   several calculations but they  vary a great  deal.  

Question by andy1917   |  last reply


tiny bowl style centrifuge?

Im trying to figure out whether this will work or not, but i cant get all the math together. i want to either A: make an attachment for my food processor to make it a bowl style centrifuge. or use a hdd motor and a brushless esc. my food processor is rated for 1750 rpms, and i figure enough room for a six inch diameter bowl.  the whole purpose of this is to use this for my algae bioreactor  as an algae filter. can you get enough force out of either of these to separate algae from water.

Question by snowfox222   |  last reply


Is algae oil suitable to be used as cooking oil ? Answered

Hi everyone, Is algae oil suitable to be used as cooking oil ? does it have any strange taste or odor ? what color is the oil ? I am not after biodiesel, i need to know if the algae oil is edible and suitable for human consumption.

Question by Nick_Zouein   |  last reply


Chlorella Cracking?

I have recently begun looking at algae as a dietary supplement and I would like to grow it on my own.  I am aware that spirulina doesn't require cell cracking; however I already have a high protein diet and I prefer chlorella.  Chlorella's cell wall is indigestable and this prevents our bodies from getting any more than 40% of the nutrients.  I would like to know if that figure sounds right.  The biggest problem I see with growing my own Chlorella is cracking it.  I wondered about pulverizing it in a blender or using the hot to cold method, but it seems all methods other than ultrasonic waves will destroy most of the nutrients.  Is it still better to use one of these methods to get the nutrients out, or would it be best to go uncracked.  Or is there a practical way to use the sound to do it.

Question by jj.inc   |  last reply


Algae biofuel oil refining?

I have long been a fan of the idea of renewable energy from algae colonies, but I have yet to find any information on actually refining the oil produced with the algae.  I am well aware of how to remove the oil, however at that point it is just an organic crude.  Is their a process to refine it to a more diesel or gasoline-like state, or is it efficient enough to run an engine on the crude.  I am currently growing a reasonable algae colony and would appreciate assistance in doing something with the algae after it is grown.  

Question by jj.inc   |  last reply


how is made the marine algae fertilizer?

How to make the algae desalinization with easy methods. The best recipe to use the algae that is found on shore/

Question by constructora 


How do I extract vegetable oil from algae?

I've just seen the fantastic instructable on growing algae en-mass, and have a few ideas for it. However, does anyone know how to then extract the vegetable oil from the algae? Thanks :)

Question by ohowson   |  last reply


Algaerium

I'm always interested when art and science collide. In this case it's a biology! Designer and materiologist Marin Sawa has come up with some stunning designs using algae as the central theme. Beautiful and interesting!  Check out the full article on Cool Hunting

Topic by Culturespy 


electronic speed control based emp?

Is it posible to use a 20 amp 8 khz esc to power an emp? as far as why, the induction pipe from origin clear i found out runs at 4.8v 20 amps and 2-4 khz. it would be amazing to have my own low scale model of their machines for research and testing. unfortunately my research funding is slim to none otherwise i would try this my self .  if anyone has a good esc that they could try this i would love to see the results. i cant im broke, therefore forced to live vicariously through others

Question by snowfox222   |  last reply


HOW DO YOU MAKE FUEL OUT OF ALGAE?

How do you make fuel out of algae and how would you use it

Question by bossmansam   |  last reply


how do you extract oil from algae ?

Well been reading that algae is a renewable fuel but I can't see how ? So how do you get the oil that is discussed out of the algae? Is it one of these non sustainable horribly expensive and hideous to the environment jobbies that we are told will save the world?

Question by strangebike   |  last reply


Can any straw be used as an algae control in a pond? Answered

When barley straw rots it releases hydrogen peroxide that can reputedly be used to control blanket algae in a pond , (although there are conflicting reports about this.), but what about some unidentified straw that I just happen to have at my disposal? Has anyone actually tried barley straw or any other straw ; and did it work? Thanks.

Question by FriendOfHumanity   |  last reply


How can I turn algae into some sort of a biofuel?

I saw the instructable on the algae bio reactor. I then decided to use that as my Marine Biology final project but I also wanted to one up the instructable and put in my thesis that I would turn the algae into a bio fuel. How can I make this possible. Please help my grade depends on this.

Question by    |  last reply


I want to make photobioreactor which can be used for algae cultivation to produce hydrogen, which is the optimal way? Answered

Photobioreactor is a device or an arrangement used for cultivation of algae. Algae when produced can be used as a resource of biofuel, and hence hydrogen can also be produced from it. I have found many methods for algae production, but failed to know about the actual process of hydrogen production from it. so, what is the step by step process to produce hydrogen from algae economically?

Question by Deepak91   |  last reply


Hands-on Weekend Algaculture Workshop

October 18-19, 2008@ The Algae Lab in Berkeley, CAalgaelab.org: a component of The Shipyard / All Power LabsIt's a fact. Food, fuel, fertilizer, fresh water, and arable land --all are running out. But there is a crop that can grow in salt water,on true waste land, creating all the products we need by eatinggreenhouse gases and water water. And can grow 100x faster thanconventional crops. Algae! A truly green crop for a sustainablefuture.We are the Shipyard algae lab community. We have created the world'sfirst community algae lab -- for development of open source,DIY-oriented algae technology, to facilitate the co-operative pursuitof this new form of agriculture -- and we invite *you* to come learnhow to raise algae and transform them into exciting products!Whether you are looking for a job in the exploding algae biofuelsfield, or thinking about creating your own farm, we can help you getup to speed! We have created an independent, non-profit algaelaboratory for teaching and research using low-cost, widely-availablematerials, and we qould love to teach you how! Get on board with thisexciting, expanding field that's truly "green"!Over the course of the weekend we will teach you:The current state of algae farming technology, and where it's headed,What algae are interesting, and for what purposes,How to obtain algae strains,How to figure out the right nutrients for your algae,How to design and build effective ponds and bio-reactors,How to "grow out" your algae into a full-sized pond or bio-reactor,How to monitor the health of your algae, andHow to harvest your algae and make them into food, fuel, and fertilizer!All levels of experience and expertise are welcome. Graduates areeligible to become members of our lab and to use its facilities.October 18 & 19th, 11am - 6pm1010 Murray St, Berkeley, CA 94710$150 per participantmore info: [www.algaelab.org algaelab.org]contact: workshop@algaelab.org

Topic by noahw   |  last reply


How can I extract Peppermint (or another mint plant)'s oil?

I hear oil from algae is extracted by drying it, then soaking it in alcohol to dissolve the extract, then straining it and evaporating the alcohol. I might start experimenting with that, but any suggestions?

Question by sherlocksbumstead   |  last reply


Green Crude?

"Sapphire Energy has built a revolutionary platform that uses photosynthetic microorganisms to produce a renewable, high-value replacement for fossil fuel petroleum. This domestic crude oil requires only sunlight, CO2 and non-potable water - and can be produced at massive scale on non-arable land."They call it Green Crude, an algae produced product that could one day replace gasoline. It's not biofuel, or ethanol, and it doesn't require any plants or farmland. The only things consumed are waste water and CO2. They say it could also be made into jet fuel. It seems too good to be true! I can't find anything about the cost, efficiency or speculated time line, but they do have some big investors and are planning on increasing production soon.The CompanyWhat do you guys think?

Topic by Weissensteinburg   |  last reply


Are carbon neutral fuels good for the environment? Answered

I'm sort of confused about carbon neutrality and it's impact on our environment. I feel like I'm over thinking it, but could someone explain to me what exactly makes a carbon neutral fuel clean? If it's clean burning at all? I'm interested in making biofuels specifically algae fuel, and this is a term that keeps popping up.

Question by thecoonskin   |  last reply


algae+ chicken manure how to get rid of parasites and bugs, and bio diesel?

Ok so i was wondering if any of you algae growers out there have ever tried fertilizing with chicken manure and if you have found the gross bugs/ parasites/ oil crap on top/gross things, and how you got around that i tried boiling the manure in water for ten minutes to kill the stuff but it didnt seem to work? ok so ive heard of the chemical way of making bio diesel but is there any way to make bio diesel or bio gasoline or bio ethonal without nasty chemicals from the oil straight from the algae press. Im 16 and my parents dont want me to have harsh chemicals nor do i have the money to go buy them. thanks

Question by zaronas   |  last reply


[newsletter] Light Suits, LED Chess, Bioluminescent Algae...

June 26, 2008 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! The Robot Contest closes for entries in just a few days. Enter your robot now to win a trip to RoboGames 2009!Now that the summer has officially started we're celebrating with our BBQ PDQ Contest. Show us your tastiest food for the grill and win an Instructables apron! The Pocket Pal for Safe Travel by foxquarry The Invisible Face Mask! by aKaMaKaVeLy Bioluminescent Algae by ScaryBunnyMan Create Wall Art With Electrical Tape by lilybee Cheap Portable Bluescreen by themakeclass Turn Signal Biking Jacket by leahbuechley DIY Gary Fong Lightsphere by arturg Yip Yip Costume by sliny Build a 96-Volt Electric Motorcycle by Kentucky-bum Handy Tricks for the World Traveler by stasterisk LED Chess Set by Tetranitrate Mobile Computing on the Fringe by johnnyallenshaw Closes for entries onJuly 6th! Winners announcednext week Grill up something tasty! Extendable bed for an SUV or truck by galadriel How to get the best out of your travels by josh EL wire outfits by enlighted Guitar Tube Amp by gmoon Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Topic by fungus amungus 


(newsletter) Algae Bioreactor, Water Bottle Raft, Video Glasses...

Feb 5, 2009 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! Making something sweet for your honey? Enter it in Valentine's Day: Sweet Treats Contest and win some fabulous gourmet chocolate-covered cocoa beans from Cocoa Puro, or a date with our own noahw!It's cold up here in the northern areas and we want to see your great ways to fight the chill in the Stay Warm Contest. Win a brand new sleeping bag!The Tap'dNY Keep the Bottle Contest has closed for entries and now it's time to vote! Head on over to the contest page and help choose who wins a Voltaic solar-powered backpack! Algae Bioreactor from Water Bottles by mfischer Magnetic Induction Bike Lights by nagutron Glasses Mounted Video Display by XenonJohn Build a Dome out of Paper (and Steel and Cement) by sklarm Win a date or gourmet chocolate covered cocoa beans! The Perfect Valentine's Gift! Fun with Bismuth by rachel Plastic Soda Bottle Prosthesis by CIRnetwork Nail-less, glue-less, almost screw-less bed by Tazo Five-cent Tilt Sensor by ix Make a Wall from Plastic Bottles by yotnomuk Gas Bottle Wood Burner by btop Build a Raft out of Water Bottles by Weissensteinburg Make Your Own Hotwire Cutter! by Creativeman Closes for entries this Sunday! Vote for your favorites! Friendly Folding Keychain by reconscious Remove Broken Light Bulbs with a Bottle by prabbit22m Solar Necklace T-Shirt by Plusea Extreme Surface Mount Soldering by doctek Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Topic by fungus amungus 


problems with slingshot

For a slingshot made of a branch, even if there is moss/algae on it, can i just tape around the branch and ta-da! a slingshot is formed?

Question by Evesneon   |  last reply


biology maximum cell size

What stops a cell from being extremly large? inparticular in prokaryotic cells, like algae, where it is the cell and is not part of something bigger like a tissue or organ. also in the way of darwins theroy of evolution, does any one know how much it appiles to algae, either all or some strains and how much they addapt and how quickly?

Topic by thelastonekills   |  last reply


Compressing home made biogas

Hi I'm working on a project where we are using an anaerobic digester along with a series of gas scrubbers that yields biogas containing roughly 80% methane (ch4) and 20% oxygen. I know that this proportion of methane is well above the upper explosive limit of methane (about 15% methane by volume) but the presence of that much oxygen makes me nervous.  Am I going to have trouble compressing this gas mixture without blowing a new hole in my head? I am planning on compressing the purified biogas to about 20psi at between 60-80 degrees farenheight and in a respectably blast proof gas container.  please help! (Trying to help our planet!)

Question by Jdouenias   |  last reply


how to remove the bark from a branch when making a slingshot? Answered

How to remove the bark from a branch when making a slingshot? and the algae ... and the moss... on it.

Question by Evesneon   |  last reply


A source for a small Diesel engine?

I'm doing a science fair project about algae biofuels, and was looking for a small, tabletop, less then 70 lb diesel engine. Oh, and cheap would be nice too :D.

Question by Rotten194   |  last reply


Will painting a swimmimg pool a dark color promote algae to grow more than a light colored painted pool?

I am picking a new color for my inground swimming pool with filter no heater. Wanted to change to color from a basic light blue to a more modern darker color.  Was told dark colors allow algae to grow more than light colors.  Any truth to that statement?  Also because the pool is not heated which color would help keep the water warm?  I am guessing that a dark bottom pool would be warmer than a light bottom pool.

Question by cindybcin   |  last reply


Know how to make Butanol/BioButanol?

I've been recently reading up on Bio diesel and I've found that butanol is great for cars that run on gasoline/unleaded petrol.Does anyone know where there is any reliable information on how to make bio-butanol, Maybe out of algae?Wiki Biobutanol reference

Topic by thermoelectric   |  last reply


I am looking for some one that is Familiar with Bioreactors and using algae as a fuel/food/textile source In Florida

I am the president of The Progressive Club and i am looking to discus green Technologies for building alternative energies and there uses as well as recycle tech like water bottle hydroponics and plastic bag materials like the currier bag progects

Question by angelisdarker   |  last reply


hi,i wanna make the algal microbial fuel cell.which would be the efficient for the treating of waste water ?

Hi..i am new to this area...i wanna make the assemble of the microbial fuel cell which is much help full in the removing of the nitrates from the waste water...i just wanna know that using algae as the inoculum & the substrate is waste water,,by this is it possible to remove the nitrate..by this assemble...

Question by gladiator4ever 


Why cant this be used to do aquaculture? Answered

It is a 336-mile long system of aqueducts called the Central Arizona Project.   I don't see why its not used to do aquaculture of various sorts.  Farmed shrimp out here was great till the Asian imports got dirt cheap.  Now they have changed gears to grow algae for biofuels. Could that be done here?

Question by onrust   |  last reply


Urge authors to make better project summaries

Hello! I see these neat projects all the time in the newsletter, but when I click on them I'm often bewildered.  When I see an instructible  want to know one thing: What does it do? Maybe it's my own shortcoming, but I wish that people would say in the first sentence what the point is of their project.  EXAMPLE 1: https://www.instructables.com/id/PC-SOUND-CARD-SCOPE-INTERFACE-FACILITATES-DC-RESTO/ This project is super cool and the steps seem clear.  However, what does it do?  It says in the title "facilitates DC restoration".  I don't know what that means.  It also says in the link "PC Sound Card Oscilloscope".  Does an oscilloscope somehow facilitate DC restoration?  I probably don't know enough about electronics for this to be useful to me, but it would be really nice to understand what he's making and what you'd use it to do.  EXAMPLE 2: https://www.instructables.com/id/Mini-2-wheel-robot-with-IR-sensor-weight-14gr-and-/ I'm sorry to pick on the guy who's apologizing for his English, but I wish that it said what the robot does.  EXAMPLE 3: https://www.instructables.com/id/the-algae-experiment-How-to-build-your-own-algae-/ This has a great description, and this is what I'm talking about.  I can't imagine what you would do with it, but it clearly makes algae.  Cool, if I want to make algae, I'll know where to look!   I think it would be easy to encourage people to include the purpose of their project in the summary, and perhaps it could be incorporated easily into the submission process (although a simple suggestion might do the trick).  Of course there are times when it wouldn't be appropriate, like when posting art related instructables.  Also the general purpose stuff, like how to make balls of ice (although it would be interesting to know why someone would make an ice sphere maker)!  Also guides, like "Plant Terrarium Basics" don't need the purpose spelled out.  But, I think that lots of other things would really benefit from it! Thanks, Gene

Topic by geneorama   |  last reply


Solar Panel Sun Tracker, Kite Boat, Homemade Wind Turbine

Solar Panel Sun Tracker Kite Boat Homemade Wind Turbine Solar Lawn Mower Breath-Powered USB Charger The California Cooler   DIY Solar Setup Solar Thermal Water Heater Truly Insulate Your Home 440 Watt Bicycle Generator Vertical Wind Turbine USB Bike Charger Solar Heater Algae Bioreactor Air Duct Turbine  

Topic by randofo   |  last reply


How do I Keep a Swimming Pool Clean?

I have a pool in my yard that nobody has used for years.  I would love to backfill it with dirt but my wife says no.  I am getting sick and tired of using "human safe" chemicals to keep it clean, especially as it still gets algae during our hot Las Vegas summers. I am looking for some chemical(s) are are EPA legal but so powerful that nobody should swim in them.  Essentially, what I want is something that will kill everything in the water and keep it dead for a significant period of time.

Question by donaldsc   |  last reply


Let It Glow! Contest Winners

Instructables and Monkeylectric are happy to announce the winners of the Let It Glow! Contest. The competition for this one was pretty fierce. Some very creative and crafty people entered some amazing Instructables and will be providing inspiration to other makers for a long time to come. The efficient LED was the most common tool of illumination, but there were also glowing bulbs, EL wire, candles, and even algae. It was a good show put on by all.If you didn't win, we highly recommend you check out the prize, the m132s from Monkeylectric. The pictures of it are fantastic and it looks even better in person.OK, on with the winners! Third PrizeThe authors of these Instructables will each receive an LED Throwie kit and an Instructables Robot t-shirt. 1up Mario Candle Animate with light Audio Visual Art....FOTC Style Building your own ambient color lighting bars Goldie's Toxic Waste Barrels Grow Your Own Bioluminescent Algae How to make an Iron Man Arc Reactor Light Bar Ambient Lighting LED Disco Light in a Jar! The Lucid Dream Machine Model Rocket LED Glow Effects Razor Scooter Underglow Double Mod! Second Prize The authors of these Instructables will each receive one (1) m132 bike wheel light, and an Instructables Robot t-shirt £5 Japanese lamp from recycled materials Animating Multilayered Engravings FlashBack - Backpack, Camelbak or Jersey Integrated LED Bike Flashers LED matrix using shift registers First Prize The authors of these Instructables will each receive a set of two (2) m132s bike wheel lights and an Instructables Robot t-shirt. how to add EL wire to a coat or other garment turn signal biking jacket

Topic by fungus amungus   |  last reply


See how it all began (but please don't visit!)

A news article on Nature today reports a find of living, growing stromatolites in an Andean saline lake (first image). Stromatolites are layered growths of cyanobacteria (photosynthesizing algae), and constitute some of the oldest (3.5 Gya!) macroscopic fossils known (second image).Update: My writeup above might be a bit misleading. This is not the only known stromatolite colony; Shark Bay, Australia, is the most well known, and there are a few in South Africa. This discovery is important both because of the altitude, and because it's an inland site without contamination.Note: If you don't understand some of the words above, open a new browser window, type "wikipedia" in the search bar, then cut and paste the big words into Wikipedia.

Topic by kelseymh   |  last reply


Enter the Invent Your World Challenge for a chance to win seed grants and a $20,000 scholarship!

Ashoka GenV's Invent Your World Challenge has wrapped up its first round with more than 70 entries from dozens of countries. Some of the brilliant ideas include portable windmills, a personal visual enhancement system, composting toilets, algae panels and solar food carts. Visit GenVCampaigns.org to see other ideas and find out which young inventors receive funding.Round Two is now officially open. Do you have an invention or adapted technology that can benefit others? If so, enter it now to be eligible for seed grants, awards, and a $20,000 scholarship. The deadline is March 15, 2009. To learn more and enter your own invention idea in The Invent Your World Challenge visit: GenVCampaigns.org.

Topic by JimYV 


CO2 extraction, SFE build ideas?

I'm wanting to build a SFE co2 extraction "plant" home or garage unit...i am trying to use it with essential oil extraction projects...especially with cedarwood ( i have a successful steam distillation business, distilling and fractionating cedarwood oil and blending it with various carriers to provide my cedar based pesticides and lawn care products)...but i want to increase efficiency and potency, etc. the USDA did testing with cedar and co2 SFE and had great success. i am trying to build a unit...many ideas out there...but very few clear details, videos, pictures, etc... i want to use for cedar, algae, kelp, bamboo, etc....various essential oil products... the sad thing is i can find vague info from either large commercial units or from cannabis users... IDEA's ?!?!?!?!?

Question by IdeaVault   |  last reply


Blanket weed killer

My pond gets blanket weed each year. One of the causes is excess nitrogen, but since some of this is due to run-off from farmland, I can only control it to a small extent. I have seen electronic devices sold which are a control box, with some wires which wrap around and around the pipe from the pump/filter - obviously some kind of magnetic or pulsed field is created and this wrecks the blanket weed cells without harming other plants or animals in the water - has anyone any idea how to make one? As you can see from pic2 we get tadpoles, small fish and things - the blanketweed can get so thick that the little fish get trapped in it! I have to pull it out, but often you end up pulling fish etc with it, so I'd like to resolve it. We use barley straw to prevent green algae, but it does not prevent blanketweed.

Topic by numenius   |  last reply


Simple designs for DIY home biogas generation? Answered

A friend of mine is working in Sri Lanka at the moment on a biogas project.  Part of the remit is to improve the design of a village-scale rural digester of the "buried concrete tank with a lid" design (as pictured below), by tweaking the operation in terms of feedstock, water:feedstock ratio, temperature and so on. The other task is "to design an efficient and neat anaerobic digester to market to middle class families."  I say "DIY" because making these of simple and widely-available materials is clearly preferable to involving lots of expensive parts. Collectively we seem to have a good deal of expertise on similar subjects- biodiesel, algae growing and so on, so I wondered if anyone knows enough about biogas to be able to comment on whether a simple design (possibly something like the Appleseed biodiesel processor) could be practical.  Any lateral thinking on how to overcome the limitations of small batch processing would also be great.

Question by PKM   |  last reply


Long term experiment - Transplanting lichen.

  Lichens are fascinating things.  They are a symbiotic association between a fungus and an algae and can be found growing just about anywhere if you look.  However the varieties which will thrive in a specific area are determined by the air quality as certain pollutants will kill certain lichens.  You will find the cleaner the air, the more species of lichen you will find. I picked up the lichen-rich rock in the picture from the lower slopes of Pen-Y-Ghent in Yorkshire (UK) and took it back to where I live in the Cotswolds - A rural area in Gloucestershire and around 200 miles south of the rock's 'home'.  It now resides at the top of a dry-stone wall bordering our drive. I intend to photograph this rock every six months to see which lichens thrive and which decline and whether any transfer across to the surrounding limestone of the wall.  The first photos were taken in early August.  One photo shows the lichens already established on our wall which has been there 16 years.  I'll update this topic with new pics in Feb 2012.

Topic by AndyGadget   |  last reply


Javier Fernandez-Han Wins 2009 Invent Your World Challenge

Invent Your World WinnersView more Microsoft Word documents from Youth Venture.http://socialentrepreneurship.change.org/blog/view/youth_taking_action_a_15_year_old_invents_the_futureI acted as a judge for this competition, and the winning Versatile system was of my favorites from among many interesting and thoughtful entries. Congratulations to Javier!At the tender age of 9, Javier Fernandez-Han found his calling: design for the other 90 percent - help the world's poor meet their basic needs sustainably.Several years of research and design have led to an innovative solution: The VERSATILE System - a mashup of new and adapted technology that treats waste, produces methane and bio-oil as fuel, produces food for humans and livestock, sequesters greenhouse gases, and produces oxygen.What drives this complete energy resource system? Algae - the little organism that could.For his work, Javier, 15, won the top prize in this year's Invent Your World Challenge, sponsored by Ashoka's Youth Venture and the Lemelson Foundation.We spoke to Javier about the VERSATILE System and the need for holistic thinking in the invention sector.

Topic by ewilhelm   |  last reply


Science Section

Is it just me, or is the science section as a whole getting suckier?Science is my best subject. I get A's in school, avidly read Scientific American and other science magazines, read physics and astronomy books, and once gave a 45 minute speech about the viability of Algae as bio fuel (Instructable coming soon) for a science project. So obviously, when I first joined, I ate up the science section, reading through great instructables, like the ones created by egbertfitzwilly (oh, shut up, you know who I mean) and other great instructablers. I loved them. Now however, it seems to be full of toy guns, electronics projects that belong in tech and recipes. Goda**it, just because your beer recipe uses yeast doesn't make it a freaking science fair project! If your instructable doesn't need a second category, DON'T GIVE IT A SECOND CATEGORY. Whoa, that was hard, eh? For instance, this. Its not a bad Instructable, sure, what what the heck is it doing in the science section? How about the ginger beer instructable? Or smart LED's? Or a coding machine? I want, and I'm sure others want, more Egbert and Nurdrage styled instructables, with cool stuff that makes us go "Whoa" and want to do it ourselves, not some of the random junk that people seem to throw in to get an extra 3 hits.

Topic by Rotten194   |  last reply


(newsletter) Improve your WiFi, Ultimate Breakfast Sausage, Chocolate Enchilada...

Feb 26, 2009 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! Want to win a laser cutter?Enter any awesome project with a green twist in the Epilog Challenge and win an Epilog Zing laser cutter or gift certificates from Ponoko!The Valentine's Day: Sweet Treats Contest has closed for entries, but is open for voting through Sunday. Who should win the chocolate, or a date with Noah? Vote for your favorites!We're in the running for the best Classic website in the SXSW People's Choice Awards! Vote for us!Coming soonEnjoy modifying the things you buy? Then check out the upcoming ThinkGeek Hacks Contest. Hack or modify any ThinkGeek item and win a $250 gift certificate to ThinkGeek! World's Greenest Water Pump by eltigre Get Smart Style Shoe Phone by gardners How to Make Anything by Stuart.Mcfarlan Learn Needle Tatting With Flower Pendant by TotusMel Win a laser cutter! Make Artificial Fishing Bait for Little to No $ by unexplained_3 The Portal Door by ddi7i4d Ear Bud Case from a Contact Lens Case by mowdish Simple Algae Home CO2 Scrubber by egbertfitzwilly Featured question from the new Answers section: Can I make a micro Tesla coil powered by a 9 volt battery? Asked in Offbeat by LaxLuvr Chocolate Tortilla Ice Cream Enchilada by sansoy What to do with an Old Computer by prodlad Steampunk Bluetooth Headset by Absconditus The Ultimate Breakfast Sausage by noahw Vote for your favorites! Do so much more with less! Make a WiFi Antenna by huang.wencong Optical Illusion - Falling Buildings by DoubleVision Power LEDs with AC by qs The Emergency Flash Drive by graphicsman Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Topic by fungus amungus 


UV filtration in your fish tank or small fish pond

Year after year the topic "I have a fish tank" seems to go more out of control. What was once a hobby just to have some fish can now be a design feature both in your home and inside the tank. Realistic looking lasdscapes, optical illusions that make you think the tank is much bigger and the list goes on. But one thing that now always pops up is the must have thing of UV filtration. Or to be precise: UV-C sterilisation! Now, if we trust Wiki and our big water suppliers then UV-C will literally kill anything alive that comes into contact with. So of course it would be a good thing to have for your tank - or not? UV-C is very dangerous for your eyesight and quite harmful for your skin! Looking into a proper UV-C lamp without protection means you can go blind! Even good sunglasses might not have enough protection in the UV-C range, so only use them for additional protection but never without and glass between you and the lamp! Don't be a fool! Treat UV-C seriously! You would not look into the full sun with your sunglasses and would not expose your eyes or skin to a powerful laser, UV-C is to be treated the same way! Let's start by using some boring text to explain the concept a little bit. On a large scale special and quite powerful systems are used to treat our drinking or pool water. Here special UV-C lights with a wavelenghts of 260nm or below are used to shine through the water passing by. There are two key factors here. a) the wavelenght b) the water flow rate and the corresponding time the water is in contact with the UV light To ensure all bacteria, viruses, algae and other harmful organics are dead the water must circulate for long enough so even the last water molecule had a few seconds of exposure. All this only works good with "crystal clear" water for obvious reasons as otherwise the UV has to be even more powerful to pass through. Single cell organisms literally crack into pieces similar to being exposed to gamma rays, more complex cells like algae have their cell membranes damages and the DNA suffers as well causing reproduction loss and early death. Even some chemicals break down, most importantly here chlorine based substances. Differences within the UV-C range! If you bothered to check Wiki about the topic of UV-C you will already know that only certain wavelengths within this spectrum will actuall be powerful enough to do what we want it to do. And here is the first problem for us hobby users. Most cheaply advertised "sterlisation lamps" you find in places like Ebay are actually totally useless. Stating to be selling a UV-C light to sterilze your water in such a case is still not considered to be fraud though. Simply because it still does what it supposed to do, just very slow and with very little effect. Only the so called "short wave" UV-C range is powerful enough! To avoid loosing business during the times of the biggest hype in 20 years no seller will actuall state the available wavelengths. That means without this info anywhere you can be certain the advertised lamp is of little to no use. Even those advertised to be short wave UV-C might not be the real deal. However, if a decent manufacturer is behind the actual lamp used it is possible to check the datasheet for these performance figures - but again most cheap systems come with no-name lamps inside. Check the prices for a reputable UV-C light with the same lamp fitting, e.g. G23 and you will see it might cost more than your entire system. Ok, you have a poper short wave UV-C lamp or consider getting a canister filter with one in it.... Never, ever test your lamp without proper protection!!!!! UV-C will damage your eye within seconds! If you system or lamp does not provide a viewing port or shine through area then you have to place a piece of glass between you and the light! UV-C won't be able to penetrate normal window glass but will pass through quartz glass. Place the lamp in a box and cover with the glass. How make proper use of UV-C sterilisation... The replacement lights are quite expensive, so let's see how to get the most out of them. As said before exposure is the key factor so the flow rate of the UV system must match tank size and flow rate of your filter system. Canister filters with a build in lamp should be designed to match but I will tell you later what to look for ;) Most of us will prefer to have a in-line system if there is already a good canister filter at work, so I will focus on those and rop in solutions. If you compare in-line system you might notice that some quite small and low power units claim to allow for the same flow rates as for example 40W units. Some are fraud and just want to sell while others use simple physics to make the claim true. A good system will utilise an auger like "ramp" that forces the water to circulate around the tube many times - causing up to ten times longer exposure rates. Others create this sprial effect more like a vortex with some diverters and modified inlets. The later seems to be less efficient though with low power lamps. An in-line system should be on the outlet side of your canister filter so the best quality water will pass through it. A drop in solution should be used alone and without the existing normal filter pump you might have in there. Ok, got it, but how do I actually use it now? Despite common thinking a UV-C system should not run 24/7 like your normal filter. You really only need it to solve problems you should not have in a healthy tank! It is not a magical solution to make your underlaying problems go away ;) Let's start with the most common reason someone buys a UV-C system: An algae or bacterial outbreak causing greenish or milky water. If that developed slowly over a period of weeks then you would be better off to do a good clean of the tank and filter plus a decent water exchange. A few drops of meds will do the rest. And if you constantly get algae growing on your glass, ornaments and plants then your nutrient levels and water quality is not right anyway and needs a good check. But of course there is also the problem of light - too much for too long and unwanted gree appears everywhere. If in doubt reduce the light power, shade out natural light or reduce the on time for your lights. Having said that we now face the problem of a sudden outbreak after introducing new fish or plants. If you don't have a quarantaine tank chances are that sooner or later you get unwanted or even harmful guest into your tank. Here the UV-C will be beneficial, which is why a canister filter with build in light should have a seperate switch or power supply for the light. After an outbreak or while introducing new life into your tank the UV-C will remove a lot of the things that we don't want to bring along. For new life I leave the light on non stop for a week, that is for a small 4ft tank with 200 liters. To control an outbreak it depends on how bad it is. I assume here you can still see the back of your tank  but that the water either appears greenish or slightly milky from bacteria. As a personal thing I prefer to to remove and clean my filter material before treating a severe outbreak. Once done I fill the filter with a mix of activate carbon material and fine filter wool. Reason for this quite simple: The outbreak causing stuff is already in your filter material and will be a constant source of re-infection. And since breaking down all this bad stuff causes even more bad stuff to be produced as biological waste we want to discard it properly once done. Using just fine filter wool and activated carbon also reduces the flow rate bit if compacted ;) Now we can turn on the light and pump and forget about it for a while. It is not recommended to run UV lights on a timer as you want them on all time to prevent short lifespan and have ongoing treatment of the water. Good idea to take a picture at the same of a day from now on to compare and check results. After 3 days the water should definately be clearer, if not then either your filter material is packed too losse or the lamp is no good. Once the water appears to be clear do a readin test - take a newspaper behind the tank and check if the text is clear - blurry means the water is still not clean. You will reach a point where the water quality will not further improve as much as in the days before. This is the time where you discard or clean out to dry your filter material and put the original stuff back in. The activated carbon should be discarded of course. You cleaned filter material will now need a certain time to grow enough good bacteria to go back to the old performance. During this time you should still leave the light on. In most cases with enough fish and plants in the tank a week should be sufficient. After that you can leave the light off and keep the tank fit and healthy. Special case: Algae everywhere! Especially after getting a new plant you can end up with quite pesty algae growth. Be it these long ghost hair types or in a bad case the black stuff growing on plants, ornaments and the glass. I have even seen tanks with algae covering the entire bottom of the tank causing the gravel to look like carpet. Here I can only advise to set up a quarantaine tank for your fish. Then remove all infested material for manual removal and cleaning. Infested plants should be cut clean and what can be boiled should be boiled in water for a few minutes. Now start scrubbing in the tank with ongoing water replacements. I prefer to let everything settle over night without any bubbler or pump running. This way I can suck up a lot of sediment the next day. If you can remove all plants and fish you can now use hydrogen peroxide and add it to your tank water. But this is only feasable for small desktop tanks. Before using the UV as above to cure an outbreak you should consider all water one last time. Allow at least 2 weeks with ongoing water checks before adding plants back in and another week before placing your fish back in the tank. The week before adding fish should be used to monitor the plats for any signs of algae you might have missed - if you find any remove it! A week after the fish is back in you can turn off the UV light. Underwater UV-C light!? In most online stores you will find quite cheap UV lights to be advertised as underwater or in tank use. Although it might sound tempting you should be well aware of the dangers of using them. The glass of your tank will block the harmfull UV rays but the water surface won't, so either don't ever look at it or use proper sunglasses with real UV protection. Apart from the dangers to you these lamps are not just cheap in price but also cheaply produced. That means there is no way of telling how much or how little UV-C is produced. If they are good then you still need to know in what type of tank setup you can use them. As plants can tolerate a bit of UV a placement as far away from the nearest plant should do, especially if you can place a bubble wall betwenn light and plants. The fish is another thing as some seem to be unaware of the danger in their tank. This means they can get too close to the light but I have not found any articles explaining how harmful UV-C is to fish or their eyesight. I guess once your fish starts to bounce into everything you know... ;) My advise is to stay away from the idea of hanging a UV-C lamp in your tank, the risk for you and your tank is just not justified. If you need to go cheap then get two or thre of these lamps so you have spares. But use them externally ;) Meaning: Take a UV proof plastic container of small size and place the light in there. To be really safe tape the lid and all holes for the hoses with black tape. Place the container above the water level of your tank and if you only have an internal filter pump push a suitable sized hose into the outlet to feed into you canister. Check how high you pump can make it and place the outlet or overflow slightly below this level. When to change the light? If you made it all the way down here then you might already had the benefit of using light to "cure" your tank. Now we are faced with the high replacement cost for the lamp itself. Ususally only flouroscent tubes are used. It is always good to check after purchase what type of lamp and manufacturer (if there is one) was used. In some cases the system itself is like an inkjet printer: Just a cheap way to make you buy the consumables. Let's say you new in-line filter was priced at $100 to have a nice round number, some are cheaper some much more expensive. The lamp used might be an exotic type and not even be available easy, so before you buy your system check where you can get spares, not just the lamp of course. A replacement lamp can be as ceap as 20 bucks or cost even more than your system if you need to order it elsewhere. The quartz glass sleeve can break too meaning you then need a lamp and cylinder. Going with a reputable brand and paying a bit more certainly helps to get spares in the future. Let's just assume you either got your system in bulk due to the price of replacement lamps or can get them at a reasonable price. UV-C lamps are not like your normal flouroscent light tubes you have around or maybe even on top of your tank. Consider them like the tubes used in the now unhealthy tanning beds. After a certain amount of time they no longer produce enough of the short wave UV light that we need. As you can't see it and most of us won't have the means to specifically measure it we have to trust manufacturers recommendations. For most good brands the numbers are the same: 8000 hours max. Considering the costs it does make sense to keep written track of the usage. Not too hard since we won't use them like normal lights but instead have them on for a week or more without turning them off. I recommend to have a replacement at hand long before you need it. A lamp can fail premature, crack or simply burn out. The 8000 hours are based on 24 hour usage, so one day on, one day off. This could mean for us the lifetime can be slightly longer but I would not go over 9000 hours. As a rule of thumb: If the water does not show good signs of getting clear on day thre the lamp is due.

Topic by Downunder35m   |  last reply