Back S. Chantsavang
Department of Animal Science, Kasetsart University, Bangkok 10900, Thailand
Full Paper (PDF File: 126KB)
Abstract
A new hybrid system of biogas production was developed for treating the
piggery wastes at Kasetsart University Animal Research Farm. The system
is a combination of a settler, a low rate anaerobic digester (generally
known as biogas plant) and a newly developed aerobic digester (namely bio-contact
aeration system). The settle separates piggery waste water into two parts
: a low-volume solid portion with high TS concentration flowing into the
low rate digester and a high-volume liquid portion with low TS concentration
flowing into the aerobic digester. After one month of successful operation
of the system, EM (in form of Bokashi has been added in feed at 1%) for
pigs to control the odor problem at source of production. When the system
operation was continued, no adverse effect was found both on the biogas
production and the performance of the aerobic digester. The results of
this experiment clearly demonstrated that EM can be used in coupling with
anaerobic digester and aerobic digester for treating animal wastes.