Building a simple two-barrel anaerobic digester

Friday, 10th February 2012

This computer animation shows just how easy it is to build a biodigester to create flammable biogas from animal/food waste. Simple plastic tubing, two plastic barrels and some patience are all it takes to produce - according to its creators - around two hours of cooking gas per day...

Barret Lydiard |
Fri, 10/02/2012 - 16:03

So what stops the gas from leaking out between the 2 barrels?

Donny J Spradling |
Fri, 10/02/2012 - 21:40

Water...among other liquids. A light layer of vegetable oil should minimize evaporation losses.

Jl Li |
Thu, 16/02/2012 - 21:25

The diagram you show doesn't address the difficulty one would run into getting the waste (plant or animal) into the barrel without clogging the pipe. How would you get around the contents getting compacted at the elbow of the pvc or at the end of the pipe. Shouldn't the end of the pvc be situated higher up ? And how about a natural curve and a plunger of some sort to push the stuff down into the pipe ?

sdietrich |
Tue, 13/03/2012 - 17:14

I am very interested in creating the entire process, is there another video for taking the gas from the tanks into production for use either to create electricty and or propane for a gas stove.
Do you know if this is safe for use in a neighborhood?