loading

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 1231Next »
ShekharB11 days ago

kindly get me detail on shekhar392@gmail.com

antoniraj (author)  ShekharB11 days ago
Please see attached files sent to your mail
respected sir
i am going to make my engineering project on biogas...
I requires help from you
regarding how to make prototype .what we can make changes improvement in biogas system to increase efficiency....and all information regarding biogas
my email id is as follow
sachinranvir31@rediffmail.com
thanks
antoniraj (author)  sachin ranvir10 days ago

please go through the attached files sent to your mail

Sir, could you please send me the files? aseyadua@gmail.com
Thank you.
antoniraj (author)  Asekhameyesterday

please see attached file sent to you

Sir, could you please send me the files? aseyadua@gmail.com
Thank you.
Sir, could you please send me the files? aseyadua@gmail.com
Thank you.
Sharma SD3 days ago

hai fnds can u help me how to do this plan in my home...plz send me those way to sharmawithyou@gmail.com

respected sir

I went through all the comment and I am very much interested in constructing a biogas plant in my school for canteen can you please guide me details for this process on psanthoshkumar1993@yahoo.com

antoniraj (author)  psanthoshkumar19936 days ago
Please see files sent to your mail
rjayaram7 days ago

It is seen that the digestion tank soon becomes a good medium for mosquito breeding. The entry of mosquitoes to the tank through the annular space may be prevented by using a very loose long rolled mosquito net , one end tied to the top of the guide tube and other end fastened around at about 1 ot 2 inches from the top of the digestion tank. The length is such that it does not obstruct the free movement of the floating tank. The exit tube also may be thus covered by a large net which may have to be cleaned frequently to avoid clogging.

Hi sir, im very much interested in biogas project. Please send me detail information to help me set up one myself. My address is; gkivia.gk@gmail.com
Thanks in advance for your help.
antoniraj (author)  George Kivia10 days ago
please go through the attached files sent to your mail
refueled11 days ago

Please provide the detailed plan along with the necessary dos n don't to employ it properly for home use.

email- chandansingh.ck@gmail.com

antoniraj (author)  refueled11 days ago
please go through files sent to your mail
mwesiga12 days ago

hello, i tried putting up the project using kitchen waste mainly. but after a 10 days there is no gas produced. some help please

antoniraj (author)  mwesiga11 days ago
Cow dung or Horse dung is initially required as they contain microorganisms necessary for breaking down the wastes. Once the microorganisms start multiplying, they feed on the waste to produce gas. if you have not started the system with cow dung, you can do it now
santoshy213 days ago
santoshy214 days ago
ShahzadA515 days ago
oashiru18 days ago
Sir, Please send me the data at oashiru@ymail.com. I am interested in starting a biogas line. I would also appreciate it if u can send one for industrial scale
antoniraj (author)  oashiru17 days ago
Please go through the attached files sent to your mail. they include construction plan for large scale model also.
Hello sir ,
Can we use under ground tank as digester.
antoniraj (author)  manoj_badhel23 days ago
yes, you can very well use an underground tank as digester
StephenN1125 days ago
I'm gonna try this.....
antoniraj (author)  StephenN1125 days ago
you can try this for a science fair project. this is a prototype and not sufficient for home use
StephenN1125 days ago
sir. why do we need the guide pipe, n why is it not leaking at the gas tank if its a moving part?
antoniraj (author)  StephenN1125 days ago
the guide pipe helps the gas holder tank move vertically, otherwise the gas holder tank will tilt to one side. The outer pipe fitted with the gas tank is sealed from outside, so there will not be any gas leak
StephenN1125 days ago
its good
Pradeep198228 days ago

Hi Sir, I am very much interested in building this system for my project. Please share me the data of Making Biogas Plant. My Email ID is say2kvp@gmail.com

antoniraj (author)  Pradeep198228 days ago
please go through attached files sent to your mail
Sir, please send me the data of making biogas plant.. My ID is as follows...
badhel.manoj@gmail.com
antoniraj (author)  manoj_badhel29 days ago
Please see attached files sent to your mail for more information
tom_anney1 month ago

Good evening Antoniraj;

I just came across Bio-gas recently; and I do believe its a better alternative to LNPG;

Can you please help with a mail stating instrucions on setting up a small plant to a big plant (Digester).

My email is olatomanney@gmail.com

Thank you in advance.

antoniraj (author)  tom_anney29 days ago
Please see attached files sent to your mail for more information
tom_anney1 month ago

Good evening Antoniraj;

I just came across Bio-gas recently; and I do believe its a better alternative to LNPG;

Can you please help with a mail stating instrucions on setting up a small plant to a big plant (Digester).

My email is olatomanney@gmail.com

Thank you in advance.

Hello sir,
1) I want to make small biogas plant which can use for cooking purpose. For that which size of containers i supposed to be use.
antoniraj (author)  manoj_badhel1 month ago

If you want to use it for cooking purpose, then you need a minimum 500 liter capacity digester tank. Please see my other instructables here...

http://www.instructables.com/id/Constructing-a-Med...

http://www.instructables.com/id/Make-Energy-From-W...

leohood1 month ago

ok sir, but will slurry be able to come out from this small space?

1-40 of 1231Next »