Abstract
This paper investigates and provides a critical analysis of the toluene biofilter model developed by Li and De Visscher. The model simulation results have been reproduced and compared with several sets of experimental data from literature. Three different model variations are considered: model with no substrate inhibition, with substrate inhibition, and with air flow rate modification. A sensitivity analysis has been performed on model to study the effect of important parameters on the removal efficiency. Model limitations and improvements have been highlighted.
Highlights
The upsurge of strict environmental regulations to maintain good air, soil and water quality requires the use of proper pollution control and pollution prevention equipment
This paper investigates and provides a critical analysis of the toluene biofilter model developed by Li and De Visscher
The surface of the porous material in the biofilter is covered with biofilms which are made of microorganisms
Summary
The upsurge of strict environmental regulations to maintain good air, soil and water quality requires the use of proper pollution control and pollution prevention equipment. Traditional pollution control technologies such as incineration, carbon adsorption and wet-scrubbing may be used to control pollution. These conventional techniques are becoming more expensive due to more stringent environmental regulations [1]. Biofiltration is a pollution control technique that uses living microorganisms to capture and degrade pollutants from air. A biofilter is a packed bed that utilizes a packing material with microorganisms such as bacteria immobilized as biofilm on the surface and the pore structures of the packing material. The flow of contaminated air through the biofilter results in the degradation of the pollutants by the immobilized microorganisms. Treatment begins with the transfer of the contaminants from the air stream to the biofilm phase. Biotransformation converts the contaminant to biomass, metabolic by-products, carbon dioxide and water
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