Instructables

How to make biogas for domestic purpose (cooking) from organic waste?

Some part of the world the price of LPG (Liquid Petroleum Gas) which is the main source for cooking, and I know people used to make biogas from cow dung etc.,but in my case we haven't any cattle and I was told that it can be done through organic like kitchen waste etc.., Thanks in advance.

How to make biogas for domestic purpose (cooking) from organic waste?
khaz2 years ago
I've been reading about the biogas lately, and I'm curious about it, as well.

I came across many questions, without answers, yet. The starting point of my investigation was this article. It is about an agricultural biogas installation, of 1.99MW capacity. It uses/incorporates a fermentation process called 'dry fermentation' (it is so called in this article, in Polish).

The substrates can be maze or grass. I have also read, that cellulose can be digested in this process (as Wikipedia says, the source of biogas is the 'breakdown of organic matter').

It is not an exact answer to your question, but it should contribute to the complete and final solution.

Best regards.

P.S. A bit different solution.
beehard444 years ago
it's kinda easy, just get a HUGE tarpaulin (like 5m x 5m) and fold it into half. Seal the edges. Poke a hole at the top and put a small pipe (maybe 1/2 will do) , with a threaded ball valve attached, through it. Seal it up, making sure it doesn't protrude more than 1/2 of a inch. now hang that pipe so that the pipe would be at the level if the bag was fully inflated with methane. Now poke another hole at the top, not beside the previous pipe and put a big pipe in it ( maybe 3 inches will do) and seal it up. Put your biomass in there and seal that pipe up using an endcap (you might need to put a bit of duct or electrical tape for it to fit snug). now wait 1 week for the bag to inflate. attach a pipe from the ball valve to your gas range (you might need to enlarge the holes later) and put pieces of wood on top of the bag as weights. Light your gas range. IF it does not light, enlarge the gas range holes a bit.
Now make yourself a cup of tea!
jtobako5 years ago
It takes a BIG digester to make much gas-on a good, warm day the volume of gas is about the same as the mash. Mostly, it's getting a starter bacteria and, in this case, grinding up the waste (dung is pre-ground). The mash is something like 40 water to 1 organic, has to be cleaned out every once in a while, and takes several days to start up unless you have a continuous batch reactor. Simplest is one barrel upside down inside another, the mash creates a gas that raises the inner barrel and you pipe out that to your flame.