Study on the Biofilm Characteristics in Biotricking Filter Treating Odour Gas with Large Flow and Low Concentration

Abstract:

A biotrickling filter which was packed with plastic striplike material, elasticity threadlike material and sponges was designed to remove odour from garbage compressing station.The air flow was increased to 8000 m³/h to obtain EBRTs of 2.5s. NH₃ elimination capacities were observed. The liquid medium recirculated resulted in an increase of the elimination capacity from η=75% to η= 90%. The biomass and microorganism activity on the filling materials were tested, the results shown that microorganism quantity and activity decreased in the order of plastic striplike material > elasticity threadlike material > sponges. Finally how to improve the treatment efficiency from the aspects of technics and types of film carriers were discussed.