Instructables

Mini Bio-gas plant using food waste, decomposable organic material and kitchen waste

FeaturedContest WinnerContest Winner
Picture of Mini Bio-gas plant using food waste, decomposable organic material and kitchen waste
011.jpg
I have been searching for some method of using the food waste, decomposable organic material and kitchen waste efficiently, and came across information on producing bio-gas from organic waste.

The bio-gas produced from food waste, decomposable organic material and kitchen waste, consisting of methane and a little amount of carbon di oxide is an alternative fuel for cooking gas (LPG). Also, the waste materials can be disposed off efficiently without any odor or flies and the digested slurry from the bio-gas unit can be used as an organic manure in the garden.

Components of the Bio-gas Plant

The major components of the bio-gas plant are a digester tank, an inlet for feeding the kitchen waste, gas holder tank, an outlet for the digested slurry and the gas delivery system for taking out and utilizing the produced gas.

This project is also useful for students to have a hands-on learning experience in constructing a Mini Bio-Gas Plant, using locally available material.

Material Required:

1. Empty PVC can 50 ltrs capacity: 1 No. (to be used as Digester Tank)
2. Empty PVC can 40 ltrs capacity: 1 no. (to be used as Gas Holder Tank) (Make sure the smaller can fits inside larger one and moves freely)
3. 64 mm dia pvc pipe: about 40 cm long (to be used for feeding waste material)
4. 32 mm dia pvc pipe: about 50 cm long (fixed inside gas holder tank as a guide pipe)
5. 25 mm dia pvc pipe: about 75 cm long (fixed inside the digester tank as a guide pipe)
6. 32 mm dia pvc pipe: about 25 cm long (fixed on digester tank to act as outlet for digested slurry)
7. M-seal or any water-proof adeshive
8. Gas outlet system: Please see Step 4 below for required materials and construction

Tools required

Do not require many tools here. A hack saw blade for cutting the cans & pipes and a sharp knife for cutting holes on the cans are all the tools we need.

Additional accessories

A single burner bio-gas stove or a Bunsen Burner used in school laboratories
 
Remove these adsRemove these ads by Signing Up

Step 1:

Picture of
002.jpg
Bought this 50 ltrs capacity PVC can, which will act as the digester unit and removed the top portion of the can, by cutting it with a hack saw blade:

Step 2:

Picture of
004.jpg
The smaller white can, which will act as the gas holder fits inside the red one. Here, again removed the top of the white can, also with the help of a hack saw blade:

Step 3:

Picture of
64 mm, 32 mm and 25 mm dia PVC pipes which  will be used for feeding the kitchen waste, guide pipe for the gas holder and guide pipe fixed with the digestion chamber respectively. A small piece of 32 mm dia pipe will be used as outlet for the slurry:

Step 4:

Picture of
  1. items required for the gas delivery system: got these items from a hardware store

1. Ball valve : one no ( to adjust the gas flow)
2. 'T' joint : one no ( to connect the gas holder and the ball valve)
3. Cap to block one end of 'T' joint : one no
4. Coupling or Adapter : one no (to connect vertical end of 'T' in to the gas collector)
5. Nipple: one no (added to the coupling in to the gas collector)
6. Gas pipe (flexible) : two meters
7. Barb : one no (fitted with the gas pipe, to join with the Ball valve)
8. Clip : one no (used for crimping the barb with the gas pipe and make it leak-proof)
9. Teflon tape : one roll (used as thread tape in all joints)

Step 5:

Picture of
009.jpg
Here I have marked the cuts to be made in the bottom of the gas collection tank. The smaller hole on the left for gas delivery system, center hole for fixing the 32 mm guide pipe and 64 mm hole for fixing the waste feeding pipe on the right side. Made these holes with the help of a sharp knife and hack saw blade.

The next image is Inside of the gas holder showing the 32 mm guide pipe (center) and the 64 mm feeding pipe fixed with M-seal

Step 6:

Picture of
Top view of the gas holder showing the feeding pipe, central guide pipe and the gas delivery system: I have closed the feeding pipe withe an old lid  (red one). This will facilitate opening the feed pipe only during feeding the system.

Step 7:

Picture of
Digestion tank fitted with the central guide pipe and the outlet pipe for the slurry:

Step 8:

Picture of
Completed unit. I have removed the gas pipe, so that the joints will get cured without any stress:

Wait for a day or two before feeding the system, allowing all joints to get cured and become leak-proof.

Initially, cow-dung mixed with water will be fed in to the system, which will start the gas formation process. Subsequently, food waste, decomposable organic material and kitchen waste will be diluted with water and used to feed the system. The gas holder will rise along the guide pipes based on the amount of gas produced. We can add some weight on top of the gas holder to increase the gas pressure. When we feed the system, the excess digested slurry will fall out through the outlet pipe, which can be collected, diluted and used as organic manure.

Initial production of gas will consist of oxygen, methane, carbon di oxide and some other gases and will not burn. These gases can be released to the atmosphere by opening the ball valve at least three / four times.

Subsequent gas will consist of about 70 to 80 percent methane and the rest carbon di oxide, which can be used in a single bio-gas burning stove or a Bunsen burner.

Total cost of this proto-type system is about one thousand Indian Rupees (about 20 dollars)

This is a basic prototype of a Bio-gas system using the food waste, decomposable organic material and kitchen waste to produce gas. An one thousand litre capacity Digestion tank will be sufficient for a small household for daily cooking purpose. The bigger commercial models provide a water seal between the digestion tank and gas holder tank.

You can get further information on kitchen waste based mini Bio-gas plant at the following links:

http://e-biogas.blogspot.in/

http://www.samuchit.com/index.php?option=com_content&view=article&id=8&Itemid=10

Step 9:

Picture of
IMG_3169.JPG
Charged the digester tank with cow dung diluted with water. Placed the gas holder tank and left it for two three days. The cow dung slurry started the process of gas forming.

Gas formation started and the gas holder tank gets lifted up. I have placed two bricks on top of the gas holder to get more gas pressure.

Step 10:

Note for students who are doing this as their School Project:

1. Take guidance from your teacher while using the gas in a stove or Bunsen burner.
2. Collect surplus food and wastage during lunch, dilute and feed the system.
3. Fruit peels, extracted tea powder, waste milk and milk products  can also be used for feeding the system.
4. DO NOT USE eggshells, Onion peels or left-over bones in this system as they will affect the efficient functioning of the system
5. Plant some seedling
6. while feeding, collect the slurry from the outlet, feed the seedlings and watch them grow
1-40 of 675Next »
MuraliD5 hours ago

send me the details muralidharan53952@gmail.com

antoniraj (author)  MuraliD3 hours ago
Go through the attached files sent to your mail
Jayanth VS17 hours ago

Hi Antoni,

I would like to make this at home could you please share the details and also the list of items which can go to the digester and which should not be put (outer cover of Orange / Lemon etc). Thanks in Advance - Jayanth.Sindhe@gmail.com

antoniraj (author)  Jayanth VS3 hours ago
Please go through the attached files sent to your mail for more information.

You can add all animal waste, kitchen waste and left-over food. Do not feed onion skin, garlic skin, egg shells, bone and anything containing lots of fiber like Drumstick
arcorrenyesterday

Hello,

I'm currently creating plants that I'd like to fuel with group kitchen waste as well as organic material pulled from our gardens. It would be greatly appreciated if you could tell me just how much material you put in the digester, and how much biogas it was able to reliably yield. Thanks in advance. My email is alex@humanitad.org

antoniraj (author)  arcorrenyesterday
Please go through files sent to your mail. You need to feed the plant about 5 kgs of waste per 1000 ltr capacity digester tank and you will get about 800 to 1000 grams of biogas depending on the type of feed material
YasifH5 days ago

Would you be kind enough to send me a detailed document on yasif009@gmail.com

Thank in advance.

antoniraj (author)  YasifH3 days ago
please go through files sent to your mail
Subandi5 days ago

Would you sent me more details on how it works and how to use it etc. at soebandy@gmail.com

antoniraj (author)  Subandi3 days ago
please go through files sent to your mail
AshutoshV4 days ago

PLease mail me a better and efficient version of protoype of bio-gas.

ashutosh61293@gmail.com

antoniraj (author)  AshutoshV3 days ago
please go through files sent to your mail
Hiddenp4 days ago
YasifH5 days ago

Would you be kind enough to send me a detailed document on yasif009@gmail.com

Thank in advance.

YasifH5 days ago

Would you be kind enough to send me a detailed document on yasif009@gmail.com

Thank in advance.

ggatz121 days ago

hello.

Could you please sent me more info about this. It is really ineresting. Please provide me with the details

antoniraj (author)  ggatz121 days ago
Please give me your mail id

gkatzoulis@gmail.com

thank you in advance

antoniraj (author)  ggatz113 days ago

Please go through attached files sent to your mail for more information on Bio-gas

hi sir please sent me me the fully elaborated documentation of the biao gase plant
and i did not get yet about the time frame of "chaging the water and dung mixture"
my e mail address is
umairkhaliq24@gmail.com

antoniraj (author)  UmairK17 days ago

Please see attached files sent to you for more information

thank you.

Could anyone tell me the brand of the tubs as I need them for something else

Sir,,

I am really interested in
this system, I wish to apply it in my native place, and it can reduce
the costs to LPG and will be a good step for families.

Please
send me the details to my mail id so that we can plan to implement in
our area for whole families. my mail id is thanvinilesh@hotmail.com

antoniraj (author)  thanvinilesh7 days ago

Please see attached files sent to your mail for more details

scififteen9 days ago

Hello, sir.

Would it be alright if you sent me more details on how it works and how to use it etc. at sabine.chiongbian@yahoo.com

Thank you.

antoniraj (author)  scififteen7 days ago

Please see attached files sent to you for more information

It is really an awesome project! Can you share me the details please? My email>> guruprasadkurtkoti@gmail.com

antoniraj (author)  GuruprasadK7 days ago

Please see attached files sent to you for more information

ali.suit9 days ago

I am really interested in this system

my email addres plz send me more details

ali_suit@yahoo.com

antoniraj (author)  ali.suit7 days ago
Please see attached files sent to you for more information

Hello sir,

I want to know more info. about this system.Please send me details on

udaypatil489@gmail.com

antoniraj (author)  uday.patil.12578 days ago
Please see attached files sent to you for more information

Sir,,

I am really interested in
this system, I wish to apply it in my native place, and it can reduce
the costs to LPG and will be a good step for families.

Please
send me the details to my mail id so that we can plan to implement in
our area for whole families. my mail id is thanvinilesh@hotmail.com

antoniraj (author)  thanvinilesh10 days ago
Please see attached files sent to your mail for more details

can i get a detailed instruction for this mini bio gas plant? here's my email kelvinclyderomerotan@outlook.com tnx

antoniraj (author)  kelvin.romerotan10 days ago
Please see attached files sent to your mail for more details
mosess12 days ago

Hi i would like to use this in my college kindly send all the details with explanation

antoniraj (author)  mosess10 days ago
please give me your mail id and I will send the details
SureshK315 days ago

Hi Sir,

My name is Hareesh. We are planning to construct the Biogas plant for our hostel. Could you please let me know the step by step process to make the plant. Please include some pictures also, so that we can understand much better.

mail id : hareeshachary@gmail.com

1-40 of 675Next »