Removal of the ammonia and odor from composting process by using trickling filter

　　There were two trickling filters used in this study. Filter A was inoculated with ammonia-oxidizing bacteria. Filter B was pH controlled. The exhausted gases of broiler litter composting process were conducted to these two bio-trickling filters to reduce the NH3 and odor emission. According to the removal rates of NH3 and odor, a bio-trickling filter with GCT 15 s and a trickling filter with pH at 6 were suggested to be utilized on the removal of ammonia and odor produced during the composting process of broiler litter.

(T. H. Hsiao)