Review: Waste gas biotreatment technology

Abstract

: This paper presents fundamental and theoretical aspects of biological waste gas treatment technologies as well as examples of applications to di †erent compounds. The three most widely used technologies are described, namely bioÐltration, bioscrubbing and trickling bioÐltration, focusing more extensively on bioÐltration which is the most studied and most extensively used process. A description of the di †erent technologies from technological and economic points of view, including an analysis of models used in waste gas biotreatment is given. Results presented in the literature concerning the removal of aliphatic, aromatic and mixtures of contaminants are reviewed. Carrier materials, inocula selected and alternatives proposed for regulating moisture content, pH values or for controlling pressure drop are considered. New technologies and reactor design studied at laboratory-scale are mentioned.1998 SCI (

Treatment of organic waste gas in a paint plant by combined technique of biotrickling filtration with photocatalytic oxidation

“…Thus, biological and photocatalytic oxidation (PCO) have becoming attractive techniques for this purpose due to their low energy consumption, relatively moderate operating costs and minimal byproduct generation [11]. Moreover, these two techniques can decompose VOCs to nontoxic final products such as CO 2 and H 2 O at ambient temperatures [12][13][14][15][16][17]. Several researches have been found that a large number of VOCs, like benzene [18,19], toluene [20,21], xylene [1,22] and styrene [23,24] could be removed by single biological or PCO purification technology.…”

Co-treatment of single, binary and ternary mixture gas of ethanethiol, dimethyl disulfide and thioanisole in a biotrickling filter seeded with Lysinibacillus sphaericus RG-1

“…), and physical technologies (condensation, adsorption with activated carbon or clean water scrubbers, etc.) have been often used for this purpose [7,10]. In most cases, some conventional physical technologies are often unsatisfactory due to organic pollutants only being transferred from gaseous to other phases, and still not being fully destroyed; while chemical technologies are always expensive [11].…”

Operational aspects of SO2 removal and microbial population in an integrated-bioreactor with two bioreaction zones

“…Thus, SO 2 dissolved in water when it passed through the liquid in SZ and the packing materials in IZ, leading to the production of SO 3 2-and H ? .…”

“…Despite the high removal efficiencies of these techniques, they require large amounts of additional energy to function as well as high capital, operation and maintenance costs. Hence, these techniques become unsuitable because of increasing demand to obtain environmental sustainability [2][3][4][5].…”