Effects of Temperature and Inlet Concentration on Acetone Biofiltration in a Composite Bead Biofilter

Abstract

In this study, the effects of temperature and inlet concentration on acetone biofiltration in a composite bead biofilter were investigated. Both microbial growth rate and biochemical reaction rate would be inhibited with increasing average inlet concentration. The inhibitive effect was more pronounced at higher operation temperature for microbial growth rate, and it was more pronounced at lower operation temperature for biochemical reaction rate. Both microbial growth rate and biochemical reaction rate would be enhanced with increasing operation temperature. Both microbial growth and biochemical reaction processes were more temperature dependent at higher average inlet concentration. The microbial growth process was more temperature dependent than the biochemical reaction process. The values of maximum reaction rate V_m and half-saturation constant K_s ranged from 0.04 to 0.05 g-C/h-kg packing material and from 37.19 to 42.77 ppm, respectively. The zero-order kinetic with the diffusion rate limitation could be regarded as the most adequate biochemical reaction model. The maximum elimination capacity of biofilter increased with increasing operation temperature. The values of critical and maximum elimination capacity ranged from 0.07 to 0.15 and from 0.13 to 0.16 g-C/h-kg packing material, respectively.