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Water Environ Res

Title:		Odor and volatile organic compound removal from wastewater treatment plant headworks ventilation air using a biofilter
Author(s):		Converse BM; Schroeder ED; Iranpour R; Cox HH; Deshusses MA;
Address:		"Department of Civil and Environmental Engineering, University of California, Davis, USA"
Journal Title:		Water Environ Res
Year:		2003
Volume:		75
Issue:		5
Page Number:		444 - 454
DOI:		10.2175/106143003x141240
ISSN/ISBN:		1061-4303 (Print) 1061-4303 (Linking)
Abstract:		"Laboratory-scale experiments and field studies were performed to evaluate the feasibility of biofilters for sequential removal of hydrogen sulfide and volatile organic compounds (VOCs) from wastewater treatment plant waste air. The biofilter was designed for spatially separated removal of pollutants to mitigate the effects of acid production resulting from hydrogen sulfide oxidation. The inlet section of the upflow units was designated for hydrogen sulfide removal and the second section was designated for VOC removal. Complete removal of hydrogen sulfide (H2S) and methyl tert-butyl ether (MTBE) was accomplished at loading rates of 8.3 g H2S/(m3 x h) (15-second empty bed retention time [EBRT]) and 33 g MTBE/(m3 x h) (60-second EBRT), respectively. In field studies performed at the Hyperion Treatment Plant in Los Angeles, California, excellent removal of hydrogen sulfide, moderate removal of nonchlorinated VOCs such as toluene and benzene, and poor removal of chlorinated VOCs were observed in treating the headworks waste air. During spiking experiments on the headworks waste air, the percentage removals were similar to the unspiked removals when nonchlorinated VOCs were spiked; however, feeding high concentrations of chlorinated VOCs reduced the removal percentages for all VOCs. Thus, biofilters offer a distinct advantage over chemical scrubbers currently used at publicly owned treatment works in that they not only remove odor and hydrogen sulfide efficiently at low cost, but also reduce overall toxicity by partially removing VOCs and avoiding the use of hazardous chemicals"
Keywords:		Air Pollutants/isolation & purification *Bioreactors Carcinogens/isolation & purification Facility Design and Construction Filtration Hydrogen Sulfide/isolation & purification Methyl Ethers/isolation & purification *Odorants Organic Chemicals/isolation &;
Notes:		"MedlineConverse, B M Schroeder, E D Iranpour, R Cox, H H J Deshusses, M A eng Evaluation Study Research Support, Non-U.S. Gov't 2003/11/01 Water Environ Res. 2003 Sep-Oct; 75(5):444-54. doi: 10.2175/106143003x141240"