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

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Picture of Mini Bio-gas plant using food waste, decomposable organic material and kitchen waste
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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
 
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Step 1:

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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:

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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:

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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:

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  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:

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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:

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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:

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

Step 8:

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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:

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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

hello sir

I just want Install a Bio/Gober gas plant for 10 to 100 small families in a village. What does it cost? Please send me importent Details.

My email ID is tarun.nptiewb@gmail.com

I am a Power Engineering student need help to plan a bio gas plant using market waste,field silage, various dungs.

My email ID is tarun.nptiewb@gmail.com

antoniraj (author)  Tarun Manral2 days ago
Please go through the attached files sent to your mail ID. For a large scale Bio-gas plant, cost should be calculated based on availability of resources like construction material, man power and machinery at your location and the number of houses you are planning to connect
vishesh924 days ago

Helo Sir

I just want Install Gober gas plant for home Please send me importent Details

email id vishesh.kumar92@gmail.com

visheshkumar92@yahoo.com

Contact no. 9012882236

antoniraj (author)  vishesh924 days ago
Please see files sent to your mail
vishesh924 days ago

Helo Sir

I just want Install Gober gas plant for home Please send me importent Details

email id vishesh.kumar92@gmail.com

visheshkumar92@yahoo.com

Contact no. 9012882236

Deepthi Ch7 days ago

Dear sir,
I am dong my B.Tech project on production of Biomass. So please give me more details regarding to Mini Biogas plant.
deepthich20@gmail.com
Thanks

antoniraj (author)  Deepthi Ch6 days ago
Please go through the files sent to your mail id for more details
skjanu7 days ago

Can a bio gas plant be feasible a village having approx. 250 houses and population of 1000 persons. If so kindly forward the details at skjanu@rediffmail.com Thanks

antoniraj (author)  skjanu6 days ago
it is possible with 500 to 600 cu.m capacity Bio-gas system, but needs professional help in designing, construction and operation. I do not have much details. You can go through the case study sent to your mail id and try to visit any of those places nearer to you mentioned there.
sudhi_sms10 days ago

Dear Sir,

I'm an Industrial Production engr and like to adopt a Bio gas plant for my home. Pls. let me know where I can buy this or who is going to give me this setup at HUBLI?

antoniraj (author)  sudhi_sms9 days ago
Hi.. Sintex is also producing Bio-gas plant. You can contact your local vendor. For product description, please see this link...

http://www.sintex-plastics.com/greenproducts/greenproduct.htm
sudhi_sms10 days ago

sudhi_sms2 minutes agoReply

Dear Sir,

I'm an Industrial Production engr and like to adopt a Bio gas plant for my home. Pls. let me know where I can buy this or who is going to give me this setup at HUBLI?

my mail ID is sudhi_sms@yahoo.com and trishakti.hubli@gmail.com

sms to 9242144407

aurooj10 days ago

hi sir

i am an architectural student need help to plan a bio gas plant for a village of 2000-3000 people capacity,market waste,field silage, various dungs... please telme how should i plan it in detail, with requirements

nidamail19@gmail.com

antoniraj (author)  aurooj10 days ago

Please see files sent to your mail

mvt_kir10 days ago

Hi antonraj,

I have one doubt,how to collect the manure. As in picture the manure collection outlet is on top part of outer container, if we are pouring slurry from the top of inner container, then how come manure manure will reach at outlet made at the top corner of outer container.

Thanks.

antoniraj (author)  mvt_kir10 days ago
We add diluted raw waste once in a day through the inlet pipe into the bottom of the digester. These materials are heavy and stay at the bottom. The digested slurry is lighter in weight. When we add the waste, the digested slurry along with the gases at the bottom rise to the top. The gas is stored in the gas holder and digested slurry drains out through the outlet pipe.

Please see the picture. The inlet pipe goes all the way down
a9743712911 days ago

heloo sir,

i wana make small bio glass plant for my home use, pls mail me details, thank u.. a97437129@gmail.com

antoniraj (author)  a9743712911 days ago
Please go through files sent to your mail id

Dear sir,

May i know weather i can start this process in our home septic tank??

Is that will work on producing bio-gas??

If yes please send me what to do in it, if no please suggest me to do it simple..

Kindly send me the details to this mail id : pavithranm05@outlook.com

Thanks and Regards,

Pavithran Sundra Vadivel.

Norris12314 days ago

Dear Sir,

I am student wishing to do a mini-project on Bio-gas, can you please send to me the details on designing a bio-gas plant and other related materials to my email ( giftnorris1714@gmail.com )

Thank you.

antoniraj (author)  Norris12314 days ago
Please go through files sent to your mail id.

I'm impressed with the process please send details to vijayalakshmi.ssk@gmail.com

antoniraj (author)  Vijayalakshmi12312 days ago

Please see files sent to your mail

prathour14 days ago

I would like make a big bio gas plant in my village. Can you assist me.

rathourpushpraj@gmail.com

antoniraj (author)  prathour14 days ago
Please see files sent to your mail id for more information. Construction details of Balaji Bio-gas system will help in a bigger plant
Akash Mehta16 days ago
Hi.... Sir I want this bio gas plant for my hostel . We need a plant for 5 kgs of waste per day.so please sent me all the details as soon as possible thank you .my email I'd is akashmehta095@gmail.com
antoniraj (author)  Akash Mehta15 days ago

Please see attached files sent to your mail id

AkashG16 days ago

Hi Sir,

I want to make Biogas Plant and want to know each and every thing for the same.....So please provide ur guidance and support for the same.Also how i can download this basic info. and where i have to go to see the running Biogas plant....Also if possible can u plz provide ur contact number .

antoniraj (author)  AkashG16 days ago
Please give me your mail id and I will send some basic information to you.

Regarding running Bio-gas plant, inquire in your neighborhood, you may find somebody running the plant. Even Syntex started manufacturing Bio-gas plant

Akash.Gandotra@yahoo.com

antoniraj (author)  AkashG15 days ago

Please see attached files sent to your mail id

shalugold116 days ago

Dear Sir,

Thanks for the instructions :). I also want to install a bio gas plant at my home.

Can you please send me the details on designing a bio-gas plant and other related materials to the email id shalugold1@gmail.com

Thank you

antoniraj (author)  shalugold116 days ago
Please go through the files sent to your mail ID. you will find more information on Bio-gas
amiyakm17 days ago

my mail id :amiya88@rediffmail.com

antoniraj (author)  amiyakm16 days ago

Please see attached files sent to your mail id

amiyakm17 days ago

hello sir. I want to construct a bio gas plant by using a waste product a college canteen.so, can you please help me on this and mail me some suggestions on gas production and also about the electricity generation from the plant.

SUNILDAI18 days ago

Hello sir, this is very useful for me.

I am interested to know about storage of bio-gas(methane). How produced bio-gas can be used effectively to minimize the use of LPG gas?

Please mail me(maharjansunil72@gmail.com) about this.

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