Air pollution has become a more and more alarming problem throughout the ages. The removal of air pollutants from gaseous effluents has been traditionally achieved through chemical and physical methods, which vary depending on the pollutants to remove. The biological removal of pollutants, especially through biotrickling filters (BTFs), has recently become attractive for the low investment and operational costs and the low secondary pollution. This paper is intended to investigate the state of the art on BTF applications. After an overview on the biodegradation process and the typical parameters involved, this paper presents the analysis of a group of literature studies chosen as the references for this sector. The reference studies are analyzed and discussed in terms of the operational conditions and of the results obtained, especially with respect to the removal efficiencies and the elimination capacities of the pollutants considered. Empty bed residence time, pollutant loading rate, temperature, pH, oxygen availability, trickling liquid flow rate, inoculum selection and biomass control strategies revealed to be fundamental operational factors influencing the removal performance of a BTF.
Air pollution control through biotrickling filters: a review considering operational aspects and expected performance
Rada, E. C.;TORRETTA, VINCENZO
2016-01-01
Abstract
Air pollution has become a more and more alarming problem throughout the ages. The removal of air pollutants from gaseous effluents has been traditionally achieved through chemical and physical methods, which vary depending on the pollutants to remove. The biological removal of pollutants, especially through biotrickling filters (BTFs), has recently become attractive for the low investment and operational costs and the low secondary pollution. This paper is intended to investigate the state of the art on BTF applications. After an overview on the biodegradation process and the typical parameters involved, this paper presents the analysis of a group of literature studies chosen as the references for this sector. The reference studies are analyzed and discussed in terms of the operational conditions and of the results obtained, especially with respect to the removal efficiencies and the elimination capacities of the pollutants considered. Empty bed residence time, pollutant loading rate, temperature, pH, oxygen availability, trickling liquid flow rate, inoculum selection and biomass control strategies revealed to be fundamental operational factors influencing the removal performance of a BTF.
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