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Biodegradation of Styrene Laden Waste Gas Stream Using a Compost-Based Biofilter Publisher Pubmed



Dehghanzadeh R1, 4 ; Torkian A2 ; Bina B3 ; Poormoghaddas H3 ; Kalantary A3
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health, Tabriz University of Medical Sciences, Tabriz, Iran
  2. 2. Institute of Water and Energy Research Center, Sharif University of Technology, Tehran, Iran
  3. 3. Department of Environmental Health, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Environmental Health Engineering, Tabriz University of Medical Sciences, Tabriz, Gholgasht street, Iran

Source: Chemosphere Published:2005


Abstract

Biological treatment of waste gas styrene vapor was investigated in a three-stage bench-scale biofilter. Yard waste compost mixed with shredded hard plastics in a 25:75 v/v ratio of plastics:compost was inoculated with thickened municipal activated sludge. Microbial acclimation to styrene was achieved by exposing the system to an inlet concentration (CIn) of 0.25 g m -3 styrene and an empty bed retention time (EBRT) of 360 s for 30 days. Under steady-state conditions, maximum elimination capacity (EC) obtained was 45 g m-3 h-1 at a loading rate (L) of 60 g m -3 h-1 (CIn of 2 g m-3 and EBRT of 120 s). Reduction of retention time adversely impacted the performance resulting in the maximum EC of 39 and 27 g m-3 h-1 for EBRT of 60 and 30 s, respectively. Evaluation of the concentration profile along the bed height indicated dominance of first-order kinetics at CIn ≤ 0.45 g m-3 and zero-order for higher concentrations. © 2005 Elsevier Ltd. All rights reserved.
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