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Removal of multicomponent VOCs in off-gases from
an oil refining wastewater treatment plant by a compost-based biofilter
system |
| Dan WU1,Chunyan ZHANG2,Li HAO2,Changjun GENG3,Xie QUAN3, |
| 1.School of Environmental
Science, Liaoning University, Shenyang 110036, China；School of Environmental
and Biological Science and Technology, Dalian University of Technology,
Dalian 116024, China; 2.Research Institute of
Daqing Petrochemical Company, Daqing 163714, China; 3.School of Environmental
and Biological Science and Technology, Dalian University of Technology,
Dalian 116024, China; |
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Abstract Waste gases from oil refining wastewater treatment plants are often characterized by the presence of multicomponent and various concentrations of compounds. An evaluation of the performance and feasibility of removing multicomponent volatile organic compounds (VOCs) in off-gases from oil refining wastewater treatment plants was conducted in a pilot-scale compost-based biofilter system. This system consists of two identical biofilters packed with compost and polyethylene (PE). This paper investigates the effects of various concentrations of nonmethane hydrocarbon (NMHC) and empty bed residence time (EBRT) on the removal efficiency of NMHC. Based on the experimental results and practical applications, an EBRT of 66 s was applied to the biofilter system. The removal efficiencies of NMHC were within the range of 47%―100%. At an EBRT of 66 s, the average removal efficiency of benzene, toluene, and xylene were more than 99%, 99%, and 100%, respectively. The results demonstrated that multicomponent VOCs in off-gases from the oil refining wastewater treatment plant could be successfully removed in the biofilter system, which may provide useful information concerning the design criteria and operation of full-scale biofilters.
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| Keywords
biodegradation
volatile organic compounds (VOCs)
biofiltration
biofilter
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Issue Date: 05 December 2009
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