期刊
CHEMOSPHERE
卷 252, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.126490
关键词
Biodegradation; BTF; VOCs; n-hexane; 4-Methyl-2-pentane; Toluene
资金
- National Natural Science Foundation of China [51978178, 51478172, 51521006]
- Department of Science and Technology of Guangdong Province of China [2019A1515012044, 2018S0011]
- Natural Science Foundation of Zhejiang Province of China [LY17E080002]
- Department of Science and Technology of Hunan Province of China [2017JJ2029, 2017SK2362]
Hydrophilic VOCs (volatile organic compounds) were applied to explore their positive influence on the elimination of the single hydrophobic VOC in biotrickling filters (BTFs). Comparison experiments were carried to evaluate the effect of 4-methyl-2-pentanone and toluene on the performance of BTFs for n-hexane removal. The results showed that the existence of 4-methyl-2-pentanone improved the removal performance of BTFs at short gas empty bed contact time (EBRT) of 15 s and low temperature of 10 degrees C. The degradation of n-hexane in the presence of 4-methyl-2-pentanone was slightly enhanced with a loading ratio of 6:1. When the mixing ratio was greater than 4, toluene significantly promoted the biodegradation of n-hexane with toluene loading rate less than 10 g m(-3) h(-1). Additionally, The promotion effect was not only reflected in the contents of proteins and polysaccharides, but also in the growth rates of microorganisms in biofilms. This work discussed the detailed effect between n-hexane and hydrophilic VOCs in BTFs, which would contribute to develop a more economical method to improve the removal performance of hydrophobic VOCs in BTFs. (C) 2020 Elsevier Ltd. All rights reserved.
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