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A Comparison of Biofiltration Performance Based on Bacteria and Fungi for Treating Toluene Vapors From Airflow Publisher



Ghasemi R1 ; Golbabaei F1 ; Rezaei S2 ; Pourmand MR3 ; Nabizadeh R4 ; Jafari MJ5 ; Masoorian E3
Authors
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Authors Affiliations
  1. 1. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Medical Mycology & Parasitology, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Environmental Health Engineering, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Safety Promotion and Injury Prevention Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: AMB Express Published:2020


Abstract

With increasing concerns about industrial gas contaminants and the growing demand for durable and sustainable technologies, attentions have been gradually shifted to biological air pollution controls. The ability of Pseudomonas putida PTCC 1694 (bacteria) and Pleurotus ostreatus IRAN 1781C (fungus) to treat contaminated gas stream with toluene and its biological degradation was compared under similar operating conditions. For this purpose, a biofilter on the laboratory scale was designed and constructed and the tests were carried out in two stages. The first stage, bacterial testing, lasted 20 days and the second stage, fungal testing, lasted 16 days. Inlet loading rates (IL) for bacterial and fungal biofilters were 21.62 ± 6.04 and 26.24 ± 7.35 g/m3 h respectively. In general, fungal biofilter showed a higher elimination capacity (EC) than bacterial biofilter (18.1 ± 6.98 vs 13.7 ± 4.7 g/m3 h). However, the pressure drop in the fungal biofilter was higher than the bacterial biofilter (1.26 ± 0.3 vs 1 ± 0.3 mm water), which was probably due to the growth of the mycelium. Fungal biofiltration showed a better performance in the removal of toluene from the air stream. © 2020, The Author(s).
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