I highly doubt it works. Gas needs to be under high pressure and a tyre tube cannot produce the pressure required for cooking; a reason why many large scale biogas production plants channel it to gas pipelines as opposed to bottling it for domestic use.

yes the tube does work, not 100% efficient but it works, the biogas installations I have seen locally do not operate under high pressure - surely not the same as the ones packed in cylinders.

but the production of the gas is very cheap, it would not be worth the extra cost of getting every ounce to use.

He said he produces 300 kg per day which he sells at 150 bob per kg. That adds to 1.35m per month.

when the pressure of the tube drops you just ask your kid to sit on it, if it drops further ask the second born to also get on the damn thing ugali iive