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Huan Jing Ke Xue

Title:		[Mechanism and performance of a membrane bioreactor for treatment of toluene vapors]
Author(s):		Ye QH; Wei ZS; Xiao P; Li HQ; Zhang ZL; Fan QJ;
Address:		"Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China. 283737880@qq.com"
Journal Title:		Huan Jing Ke Xue
Year:		2012
Volume:		33
Issue:		8
Page Number:		2558 - 2562
DOI:
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"The performance of a membrane bioreactor for treatment of toluene as a model pollutant is presented. Effects of toluene inlet concentration, residence time, spray density and pH of liquid phase on the toluene removal rate were evaluated. The experimental results showed that the toluene removal efficiency reached 99%. The optimal pH, residence time and spray density were 7.2, 6.4 s and 2.5 m3 x (m2 x h)(-1), respectively. The gas-phase biodegradation intermediate products were acetaldehyde acid (C2H2O3) and vinyl formic acid (C3H4O2), which were identified by means of gas chromatography/mass spectrometry (GC/MS). The mechanism of toluene degradation using a membrane bioreactor can be described as the combination of mass transfer from hollow fiber membrane to biofilm and biological degradation. Toluene (C6H5CH3) and oxygen diffused from the gas phase to the wet layer of the biofilm and were then consumed by the microbial communities. Toluene was oxidized to the intermediate organic products such as acetaldehyde acid (C2H2O3) and vinyl formic acid (C3H4O2), and the intermediate products were then converted to CO2 and H2O through continuous biological oxidation reactions"
Keywords:		"*Bioreactors Gases/isolation & purification/metabolism Membranes, Artificial Toluene/*isolation & purification/*metabolism Volatile Organic Compounds/isolation & purification/metabolism Waste Management/*methods;"
Notes:		"MedlineYe, Qi-hong Wei, Zai-shan Xiao, Pan Li, Hua-qin Zhang, Zai-li Fan, Qin-juan chi English Abstract Research Support, Non-U.S. Gov't China 2012/12/12 Huan Jing Ke Xue. 2012 Aug; 33(8):2558-62"