Fig. 3. A schematic diagram of abiogas plant. 1:cowshed/ pigsty/ henhouse, 2:preliminary tank, 3: agricultural/ slaughter waste,4: mixing tank,5: bioreactor, 6: cogeneration aggregate,7:post-fermentation tank, 8:collection of post-fermentation fertiliser, 9:maizesilage, 10:offices, and11:energy distribution grid.