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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
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NagaS120 hours ago

Please can you send me the full details of how you made it. This is my e-mail dsbeee@gmail.com

antoniraj (author)  NagaS116 hours ago
Please see attached file sent to your mail
NagaS120 hours ago

Please can you send me the full details of how you made it. This is my e-mail dsbeee@gmail.com

NagaS120 hours ago

Please can you send me the full details of how you made it. This is my e-mail dsbeee@gmail.com

Please can you send me the full details of how you made it. This is my e-mail kennysonubi@yahoo.com

antoniraj (author)  Kenny Sonubiyesterday
Please see attached file sent to you

please can you send me the full details of how you made it and this is my email kiransajane@gmail.com

antoniraj (author)  kiran sajane3 days ago
Please see attached files sent to you for more details

Can I get the details on vinaycv99@hotmail.com

antoniraj (author)  cvvinaynair3 days ago
Please see attached files sent to you for more details

please can you send me the full details of how you made it and this is my email chintan1201@gmail.com

antoniraj (author)  chintan12016 days ago
Please see attached file sent to your mail
diakhat8 days ago

great work, can u plz send me the full details of how you made it to my email dia.khat@gmail.com

thnx

HARSH367514 days ago

Sir can you send me the full details of your project on my email id - harsh3675@gmail.com

HARSH367514 days ago
jzavala716 days ago

Great work!!!! Congratulations, please can you send me your files too? Thank you. johanarturo69@hotmail.com

antoniraj (author)  jzavala715 days ago
Please see attached files sent to your mail...

please can you send me the full details of how you made it and this is my email eteureka5@gmail.com

antoniraj (author)  eurekakafuitamakloe18 days ago
please go through the attached files sent to your mail
Pradeep7619 days ago

can you send me the files to my mail

Mail Id:pradeep77jbs@gmail.com

antoniraj (author)  Pradeep7618 days ago
please go through the attached files sent to your mail
senhaviab18 days ago

can u send me detail at my email id.... senhavia.bajwa11@gmail.com

antoniraj (author)  senhaviab18 days ago
please go through the attached files sent to your mail

please can you send me the full details of how you made it and this is my email eteureka5@gmail.com

ismail4220 days ago

please send in my address with ozkok42772010@hotmail.co

antoniraj (author)  ismail4219 days ago
please go through attached files sent to your mail...
Thanks for easiest way to generate the gas n time to go green... Please send the details to my mail id - 06.kumardhiraj@gmail.com..
I want to do for my neighbours who throw the wastage on the road n polluting the environment...
antoniraj (author)  dhiraj.kumar.79819 days ago
please go through attached files sent to your mail...
simbur22 days ago

sir,

One of best ad easy way,Kindly send this information to my mail id mailforsimbu@gmail.com. Thank you

antoniraj (author)  simbur21 days ago
Please see attached files sent to your mail

plz mail me the details on my mail id --> vijoysimha@gmail.com

antoniraj (author)  vijay.simha.71621 days ago
Please see attached files sent to your mail
simbur22 days ago

sir,

One of best ad easy way,Kindly send this information to my mail id mailforsimbu@gmail.com. Thank you

Sir
I work for a tea garden in Assam and these kind of processes will help my workers who are below poverty line kindly send more details and more such products which will help to improve their lifestyles my e mail I'd is duttac.1485@gmail.com.will be eagerly waiting fr or mail
antoniraj (author)  duttachinmoy22 days ago
Please refer to attached files sent to your mail

Good work boss me also planning to set for my family so can you send me the procedure. Email: mhnkmr30@gmail.com

antoniraj (author)  mohan.kumar.102922 days ago
Please see attached files sent to your mail
ManishM424 days ago

sir i want to know the detailed procedure of bio gas how to make bio gas collector for my project. maile me at mishram65@gmail.com

antoniraj (author)  ManishM422 days ago
Please see attached files sent to your mail
MahendranM26 days ago

HI Sir,

Can you please send me the details to my mail id

mahendran.murugavel@gmail.com

looking forward to create a bio gas plant for my family.please give your suggestion and help

thanks

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