Volume 9, Issue 2 (6-2019)                   JHSW 2019, 9(2): 95-104 | Back to browse issues page

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Ghasemi R, Golbabaei F, Jafari M J, Pourmand M R, Rezaei S, Nabizadeh R et al . A comparative study of bacterial and fungal bio filtration treating toluene vapors from air stream. JHSW. 2019; 9 (2) :95-104
URL: http://jhsw.tums.ac.ir/article-1-6074-en.html
1- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
2- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , fgolbabaei@tums.ac.ir
3- Department of Occupational Health Engineering, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4- Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
5- Department of Medical Mycology and Parasitology, Tehran University of Medical Sciences, Tehran, Iran
6- Department of Environmental Health Engineering, Tehran University of Medical Sciences, Tehran, Iran
Abstract:   (637 Views)
Introduction: Air pollution is now recognized as an important environmental and health concern. Biological control processes, due to their durable, cost-effective and eco-friendly, have become a good alternative to physic-chemical methods. Biotechnology is based on the activity of microorganisms.
The aim of this study was to compare the capability of Pseudomonas Putida PTCC 1694 (bacteria) and Polarotus Stratus IRAN 1781C (mushroom) in the removal of toluene from the air stream and its biodegradation under same operating conditions.
Material and Methods: To this purpose, a bio filter containing two parallel columns was designed and constructed on a laboratory scale and the experiments were carried out based on measuring the removal efficiency (RE), elimination capacity (EC) and pressure drop in these two columns. Thus, the bacteria were inoculated in one of the columns and in the other the fungus was inoculated.
Results: The bacterial testing lasted for 20 days and the fungal testing lasted for 16 days. The contaminant loading rates (LR) for bacterial and fungal bio filters were 11.65±2.26 and 11.94±2.56 g/m3.h, respectively. The results showed that the fungal bio filter was more capable of eliminating of toluene vapor than bacterial bio filter (9.65±3.53 vs 9.18±2.6 g/m3.h). However, the pressure drop in the bacterial bio filter was lower than the fungal bio filter (1±0.28 vs 1.1±0.32 cm water).
Conclusion: According to the results, fungal bio filtration appeared to be more successful than bacterial bio filtration in the removal of toluene.
Full-Text [PDF 768 kb]   (157 Downloads)    
Type of Study: Research | Subject: Special
Received: 2019/05/30 | Accepted: 2019/05/30 | Published: 2019/05/30

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