Mesophilic and Dry Anaerobic Digestion of Wheat Straw

Relations among fermentation concentration,biogas production and constituents of fermentation residue were studied for mesophilic and dry anaerobic fermentation.The result showed that biogas production was reduced with increasing of TS content in the fermentation.And the constituents of fermentation residue,namely,organic matter,total nitrogen,rapidly-available phosphorus and potassium,did not have very obvious relations with fermentation TS concentration.The fermentation residue had higher contents of total nitrogen,rapidly-available phosphorus and potassium under higher biogas yield condition.