Field Science Center, Graduate School of Agricultural Science, Tohoku University
Abstract
Ammonia assimilation by microbes is one of important steps of ammonia removal from animal waste treatment systems. We have investigated about distribution and abundance of ammonia-assimilating microbes in the animal waste treatment systems. Ammonia assimilating microorganisms were isolated from the animal waste treatment systems by nitrogen-limited medium. Many of isolates utilized ammonia even when they were cultivated in the media containing viable microbial flora of the animal waste treatment systems. Almost of the dominant species which were detected by analysis of microbial community structure did not coincide with isolates which showed the high ammonia-assimilating ability in the lagoon, but some species by analysis of actinomycetes community structure coincided with the high ammonia-assimilating isolates in the compost. These results suggested that ammonia-assimilating microbes existed as non-dominant species in the microbial community in a lagoon, but some of cultured actinomycetes were the member of dominant species in the actinomycetes community in compost
