P-3-10 Changing the method of raising the amount of gas generation in the biogas power generation system decreased (milking cattle manure urine: from a tie to a free stall barn)

Abstract

Biogas power generation has been introduced by manure excretion in milk production. Power generation in a cold district enables thermal insulation of a large-scale anaerobic fermenter, improving income by selling electricity and properly handling livestock excreta. The results of investigation on the relationship between power generation and income actually introduced biogas power generation at one ranch are shown. The effect of biogas power generation was compared by comparing power generation amount and power selling price, purchase price of power for agriculture, facility maintenance cost and facility installation cost. This biogas power generation facility was designed in the method of cattle production connected to the barn. It caused a decrease in the amount of power generation by changing a part of the process for the production of cattle in free stall. It was speculated that it might be because the retention time in the anaerobic fermenter decreased due to urine and wash water entering.