thank you all
And right, with a liquid heat generator i have a surplus of biogas, and also right, slowly
To the build itself: I had the Idea to make the energy production from bio without using other mods, only the ic2 blocks. So, Crop Harvester in a wheat farm down with following machines: Item buffer, macerator, fluid/solid canning machine with fluid distributor and pump, fermenter, two fluid distributors to fuel the two fluid heat generators, one for the fermenter, one for a stirling generator to power everything. It worked, now i have to try to make a cube out of these things