I have build a 60 liter barrel biodigester in my house in Germany mainly to learn and prepare for building a bigger one in the future.
It's been a month and there is still no gas production. I figured the temp is too low (20 Celsius). I am not sure if I should continue waiting. I covered it with rockwool but when I put a thermometer through the feeding tube it is still 20 degrees.
I thought perhaps I should start over. mix the manure with warm water and then wrap in insolation.
Another option I thought is an electric blanket with low walt and a timer. I know it's now optimal but it is mainly for educational reasons.
What would you suggest I should do?