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Chemosphere

Title:		Performance enhancement of a biofilter with pH buffering and filter bed supporting material in removal of chlorobenzene
Author(s):		Han MF; Wang C; Yang NY; Hu XR; Wang YC; Duan EH; Ren HW; Hsi HC; Deng JG;
Address:		"School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Lab of Indoor Air Environmental Quality Control, Tianjin, 300072, China; School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, China. School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Lab of Indoor Air Environmental Quality Control, Tianjin, 300072, China. Electronic address: wangcan@tju.edu.cn. School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Lab of Indoor Air Environmental Quality Control, Tianjin, 300072, China. School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, China. School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, China. Electronic address: renhongweirhw@126.com. Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 106, Taiwan. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China"
Journal Title:		Chemosphere
Year:		2020
Volume:		20200228
Issue:
Page Number:		126358 -
DOI:		10.1016/j.chemosphere.2020.126358
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Acidic substances, which produced during chlorinated volatile organic compounds, will corrode the commonly used packing materials, and then affect the removal performance of biofiltration. In this study, three biofilters with different filter bed structure were established to treat gaseous chlorobenzene. CaCO(3) and 3D matrix material was added in filter bed as pH buffering material and filter bed supporting material, respectively. A comprehensive investigation of removal performance, biomass accumulation, microbial community, filter bed height, voidage, pressure drops, and specific surface area of the three biofilters was compared. The biofilter with CaCO(3) and 3D matrix material addition presented stable removal performance and microbial community, and greater biomass density (209.9 kg biomass/m(3) filter bed) and growth rate (0.033 d(-1)) were obtained by using logistic equation. After 200 days operation, the height, voidage, pressure drop, specific surface area of the filter bed consisted of perlite was 27.4 cm, 0.39, 32.8 Pa/m, 974,89 m(2)/m(3), while those of the filter bed with CaCO(3) addition was 28.2 cm, 0.43, 21.3 Pa/m, and 1021.03 m(2)/m(3), and those of the filter bed with CaCO(3) and 3D matrix material addition was 28.7 cm, 0.55, 17.4 Pa/m, and 1041.60 m(2)/m(3). All the results verified the biofilter with CaCO(3) and 3D matrix material addition is capable of sustaining the long-term performance of biofilters. CaCO(3) could limit the changes of removal efficiency, microbial community and filter bed structure by buffering the pH variation. And 3D matrix material could maintain the filter bed structure by supporting the filter bed, regardless of the buffering effect"
Keywords:		"Aluminum Oxide Biomass Chlorobenzenes/*chemistry Filtration/methods Gases Hydrogen-Ion Concentration Silicon Dioxide Volatile Organic Compounds/chemistry Water Pollutants, Chemical/*chemistry Water Purification/*methods 3D matrix material Biofilter Buffer;"
Notes:		"MedlineHan, Meng-Fei Wang, Can Yang, Nan-Yang Hu, Xu-Rui Wang, Yong-Chao Duan, Er-Hong Ren, Hong-Wei Hsi, Hsing-Cheng Deng, Ji-Guang eng England 2020/03/11 Chemosphere. 2020 Jul; 251:126358. doi: 10.1016/j.chemosphere.2020.126358. Epub 2020 Feb 28"