Methods for increasing the biogas potential from the recalcitrant organic matter contained in manure

摘要

The biogas potential of manure could be significantly increased by treatment of the recalcitrant organic matter (biofibers) contained in the manure. Several treatment methods were tested. Mechanical maceration resulted in an average increase of the biogas potential of approximately 17percent as shown by the continuous stirred reactor experiment. In general the smaller the fibers the higher the biogas potential was. The best results showed an approximately 20percent increase of the biogas potential with fibers smaller than 0.35 mm as measured by batch experiments. The increase was approximately 16