Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 7, Pages 2204-2209Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.10.035
Keywords
Biofiltration; Odor removal; PCR-SSCP; Microbial diversity
Funding
- National High Technology [2006AA06Z331]
- National Key Technology RD [2007BAK27B05-03]
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The treatment of odorous pollutants by microorganisms on packed waste straw and cortex was investigated at the wastewater treatment plant of the Shanghai petrochemical factory. The removal efficiency of H2S, NH3 and VOCs (volatile organic compounds) reached 98%, 91% and 90%, respectively after operation for one month at an empty bed retention time (EBRT) of 120 s. The heterotrophic bacteria were found to be the dominant microorganism in the biofilter, while fungi and actinomycetes were also present. The bacteria were mostly identified as the members of the genus Bacillus (62.5% of cultured bacteria). The single strand conformation polymorphism (SSCP) results revealed that the genus Bacillus and Pseudomonas were the predominant bacteria. The microbial diversity gradually increased as the treatment progressed, which indicated that the microbial community in the biofilter became more stable upon pollutant removal. The scanning electron microscopy (SEMI) was performed to evaluate the microorganism growth on the media. It was found that the waste straw and cortex were suitable for microorganism attachment and growth, and may have potential application in odor treatment. (C) 2008 Elsevier Ltd. All rights reserved.
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