Biogas at Home- Cheap and Easy





Introduction: Biogas at Home- Cheap and Easy

About: Making things with my hands makes me happy! I vision a world where children experience the thrill of making things and less of addictive Dopamine producing social media.

Hi there, I am Sahas chitlange, aging 14, from India. here is my homemade cheap and easy to build mini Biogas plant. It burns for approx. 20-30 mins on a bunsen burner. you can add anything from your kitchen waste ( Exept Onion peels and eggshells). In 12 hours the Gas is ready for use. It is very easy and cost effective to build (only 2-3 dollars) and gives many useful products.

the end products of this system are:
1) Methane : (Can be used as a fuel)
2) Slurry     : (the spent slurry is exellent manure)

The main components oof this system are:

1)  Inlet pipe
2) digester tank
3) gas holder tank
4) slurry outlet pipe
5) gas outlet pipe

Pls leave a comment

Step 1: Chose the Correct Container

You will have to chose a correct size container which will act as a digester tank. My one is liters tank. I got it from scrap.

Step 2: Make Holes

Make holes in the tank for Inlet and outlet. For this I took a old iron rod and heated it to make holes. CAUTION: rod is really very hot.

Step 3: Fix the Inlet and Outlet Pipes

Glue the Inlet pipe and the Outlet pipe with any water proof adhesive. 

Step 4: Making the Gas Holder Tank

I took a paint bucket of 20 lts for making a gas holder tank. this tank holds the gas produced. The tank is overturned and fixed with a valve used for plumbing purposes.

Step 5: Time to Mix the Cow Dung !

mix the cow dung (5kg for 50 liters) and add water to  make a fine slurry. Now put the slurry in the digester tank.

Step 6: Almost Finished!

Put the gas holder tank overturned in the digester tank after adding the slurry . REMEMBER: open the valve while putting the gas holder tank. the mini plant takes 10-15 days for the first time to get output. For the first time, the gas in the tank wont burn as it contains Carbon Dioxide gas, if fortunately it burns then good or wait for the second time. You can detect how much gas is there in this system, the gas holder tank will rises up as the gas is produced.  

Step 7: Working Photos

The photos of the system working are provided....... the heat is so much that it melts a thin sheet of tin in just 2 mins!!!! if you like this i'able please like and comment....

Step 8:

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5 Questions

Does it require any another chemical to add on it for the first time to generate the gas ?

hello, thanks alot for your training.

we live in city not in village.we have not cow dung.can we use 2 or 3 kilogram garbages home for making biogase?

Hi Sahas, I am in India, in Karnataka and someone ask me to help. I saw you create a biogas, it is possible to get in touch? Or you can help us to create with us? Thanks for your response. Anja

Did you cover the inlet pip and the outlet pip?

Hi good day my name is Ernest from Cameroon I'm a serious guy aim at doing something useful to my self and also a graduate from agric school now my question sir pls help and teach me on how to build a homemade boigas


The liquid left is amazing fertilizer, you could put in a drain off at a higher level than the working rest, and recuperate it.

I think it would maybe need diluting before direct plant application, as it must be pretty strong.

Gas and fertilizer in one go! Who could want more from their waste?

the last picture confuses me, why the paint bucket is "floating". i belive that it must be well atachet and sealed inside the tank. i mean, i believe the tank must be completly sealed, except by inlet pipe, outlet pipe and the vale. if the gas holder thank is floating over the slurry, how much gas it can contain and how much gas scape from digester tank?

Last question, why do you put that bricks over the gas holder tank?

sincerely i hope you can answer. i am very interested in this proyect, but need more information and alternatives to use the cow dung. i live in the middle of the city and can't get it.

thanks for your attention

1 reply

The top bucket NEEDS to expand/move as it recuperates the gas.

I guess you could find a way to put a rubber seal round its' "path", between the muck bucket and the expansion bucket.

I was thinking about that too. Unless you are lucky enough to find 2 buckets, one that fits upside down in the other PERFECTLY, then I suppose you need a seal. Some one said he built a cage on the top of the gas bucket to stop it taking off, which seems to me a doable idea.

I love this project, it's the final touch for an autonom house!

hello dear. i am Ben from Nigeria. i will like to teach my collegues and friends this method to generate biogas from kitchen waste and animal dung. I will appreciate if I can get more detailed instruction manual on how to make this home made Biogas if possible with video .

Much appreciated

My email addressess

1 reply

As you have internet try Youtube "Biogas converter DIY". Loads of videos on the same idea.

And what is left as liquid is great fertilizer, not toxic, and probably will need diluting or it will burn the plants, as it must be condensed.

Good luck, it's a great project!

Those plastic Barrels are very expensive in Uganda , out of reach for many people

We have build several using this method .

Bur we replaced the barrel ,with a hole on the ground ,and a strong plastic bag .

it has large capacity and produce more gas .... And the top of bag act as a gas storage tank ..

1 reply

I don't know what is cheap or free in Uganda, but it might be good if you could use clay or cement or plaster to line the hole. Or mud and straw well mixed.

All is pretty solid, it makes houses, so to keep a hole air and water proof... no problem.

Then use the plastic bag on top for the gas.

Though I find your idea pretty good as it is.

My suggestions are just ideas in case it may help.

Good luck, and keep it going :D

Hello sir i make a biogas plant of 20 litre but methane gas is not formed.second thing is thai if i do feeding once a time mean if i do feeding today with 1:1 and third thing is that when i do feeding second time PLZ help me i am waiting for your reply thanks alot sir

I started my bio gas project at home a few weeks ago. I experience gas forming but the gas does not burn. I have released the gas a few times but yet no result. What should I do ? E mail reply to

Hello there guys and earth savers. Im starting to build one. My question is, after filling the digester with initial mixture, how many days will i wait until it will create a flamable gas? Secondly how much mixture should i add everyday after the initial gas production to continue the methane production if my tank is 100liter capacity ? Thrirdly im using quail dung, will this work? Thankyou.

please can goat and sheep droppings be used instead of cow dung?

please send the answer to my email

Hi, I plan build one, but I read that you need some kind of methane purifier so you're not going to be dizzy or dead because of CO2s it produce along the methane(I'm not going to use just cow dung), any suggestion ?

thanks so much.i'm working in a eco green house in the caribean and ilike to have more information about biogas. please email me at a lot foryour kindness

Amazing share ! Must do and feedback

But can we use a 2 litre bottle as the digester tank and balloon s as biogas collecter??? Please reply

Hi sahas. ths is sai i need u r help bro .i make a same type digester 20 days back in my its produce the gas but its not flameble(ignite) i can't understand plz help mail id:

1 reply

Biogas contains a varying ratio of Co2 which prevent the ignition of the methane and this ration can be removed by passing the gas through limewater but I recommed Monoethanolamine because it is more efficient but little bit expensive

and also there is hydrogen sulfide whch is believed to be harmful for machines and it can also dissolve in any basic solution mentioned above.

if anyone could email me an instructional video or the further explanation on the procedure that would be amazing! also how long does it take to create a flammable gas? I am doing this for a school science fair and need more detailed instructions. thanks, my email is