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Bioresour Technol

Title:		"Enhancing biofilm formation in biofilters for benzene, toluene, ethylbenzene, and xylene removal by modifying the packing material surface"
Author(s):		Sun Z; Ding C; Xi J; Lu L; Yang B;
Address:		"Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, PR China. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, PR China. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, PR China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China. Electronic address: xijinying@tsinghua.edu.cn"
Journal Title:		Bioresour Technol
Year:		2020
Volume:		20191025
Issue:
Page Number:		122335 -
DOI:		10.1016/j.biortech.2019.122335
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"Polyurethane (PU) sponges are popular packing material in biofilters and their smooth and hydrophobic surface often leads to an uneven distribution and detachment of biofilms. In this work, the surface of PU sponge was modified to obtain higher roughness and positive charge. The performances of two biofilters (BF1 with pristine sponge and BF2 with modified sponge) for benzene, toluene, ethylbenzene, and xylene (BTEX) removal were investigated. Total Volatile Organic Compound (TVOC) removal efficiency and CO(2) increment were 61% and 804?ª+ppm for BF2 respectively after start-up, compared with 51% and 538?ª+ppm for BF1. Analysis on biofilms showed that the modification of PU sponge significantly improved the microbial growth, viability and adhesive strength in biofilms, reduced extracellular polymeric substance (EPS) and changed the microbial community. These results demonstrate that modified sponge can enhance biofilm formation and BTEX removal in biofilters and may applied in large-scale applications"
Keywords:		"Benzene Benzene Derivatives Biodegradation, Environmental Biofilms Extracellular Polymeric Substance Matrix *Toluene *Xylenes Biofilm Biofilter Polyurethane sponge Surface modification;"
Notes:		"MedlineSun, Zhuqiu Ding, Cheng Xi, Jinying Lu, Lichao Yang, Bairen eng England 2019/11/17 Bioresour Technol. 2020 Jan; 296:122335. doi: 10.1016/j.biortech.2019.122335. Epub 2019 Oct 25"