| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system and a method for treating livestock excreta, in which livestock excreta can be received even in a urine treatment facility having no energy to spare while hardly expanding the urine treatment facility, the increase of energy consumption is kept to a minimum to receive much more livestock excreta and all possible measures are taken to keep water quality safe. <P>SOLUTION: The system for treating livestock excreta is provided with a standard denitrification facility 10 having: a first agitation tank 1 kept in an oxygen-free state; a first aeration tank 2 provided with a first aerating means; a second agitation tank 3 the volume of which is made smaller than that of the first agitation tank and which is kept in an oxygen-free state; and a re-aeration tank 4 provided with an air diffusing pipe 7, which are arranged in series in this order from the upstream side. A pyrolysis facility 18 is further arranged for pyrolyzing woody biomass 45, so that at least a part of pyrolyzed residues 46 generated in the pyrolysis facility is thrown in the denitrification facility and a throw-in type aerator 6 is used as the first aerating means, so that livestock excreta is thrown in the denitrification facility together with excreta-based sewage and denitrified without throwing diluting water in the denitrification facility. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
