Abstract
Activated carbon fiber (ACF) was used as the carrier for a biofilter and the removal characteristics of ammonia gas by the ACF biofilter seeded with night soil sludge on a laboratory-scale were investigated. After physical adsorption of the ammonia gas on the ACF at 0.59 g N kg−1 dry ACF, biological the removal of ammonia occurred. The removal capacity of the ammonia gradually increased and its complete removal was observed up to the load of 1.5 g N kg−1 dry ACF day−1 while the maximum removal capacity was 3.5 g N kg−1 dry ACF day−1. Based on a kinetic analysis, the maximum removal rate of ammonia, Vm, obtained was 8.4 g N kg−1 dry ACF day−1 and the saturation constant, Ks, was 26 ppm.
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