Document Detail


Bio-oxidation of airborne volatile organic compounds in an activated sludge aeration tank.
MedLine Citation:
PMID:  15991669     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
An activated sludge aeration tank (40 x 40 x 300 cm, width x length x height) with a set of 2-mm orifice air spargers was used to treat gas-borne volatile organic compounds (VOCs; toluene, p-xylene, and dichloromethane) in air streams. The effects of liquid depth (Z), aeration intensity (G/A), the overall mass-transfer rate of oxygen in clean water (KLaO2), the Henry's law constant of the tested VOC (H), and the influent gaseous VOC concentration (C0) on the efficiency of removal of VOCs were examined and compared with a literature-cited model. Results show that the measured VOC removal efficiencies and those predicted by the model were comparable at a G/A of 3.75-11.25 m3/m2 hr and C0 of approximately 1000-6000 mg/m3. Experimental data also indicated that the designed gas treatment reactor with KLaO2 = 5-15 hr(-l) could achieve > 85% removal of VOCs with H = 0.24-0.25 at an aerated liquid depth of 1 m and > 95% removal of dichloromethane with H = 0.13 at a 1-m liquid depth.
Authors:
Ming-Shean Chou; Hsiao-Yu Chang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Air & Waste Management Association (1995)     Volume:  55     ISSN:  1096-2247     ISO Abbreviation:  J Air Waste Manag Assoc     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-07-04     Completed Date:  2005-07-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9503111     Medline TA:  J Air Waste Manag Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  604-11     Citation Subset:  IM    
Affiliation:
Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan, Republic of China. ms.chou@msa.hinet.net
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MeSH Terms
Descriptor/Qualifier:
Air Pollution / prevention & control*
Bioreactors
Methylene Chloride / chemistry,  isolation & purification*
Oxidation-Reduction
Toluene / chemistry,  isolation & purification*
Volatilization
Xylenes / chemistry,  isolation & purification*
Chemical
Reg. No./Substance:
0/Xylenes; 108-88-3/Toluene; 75-09-2/Methylene Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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