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Chemosphere

Title:		"Abatement of binary gaseous chlorinated VOC by biotrickling filter: Performance, interactions, and microbial community"
Author(s):		Li Q; Tang Z; Ou Yang D; Zhang J; Chen J; Chen D;
Address:		"College of Petrochemical and Environment, Zhejiang Ocean University, Zhoushan, 316022, China; Zhejiang Provincial Key Laboratory of Petrochemical Pollution Control, Zhejiang Ocean University, Zhoushan, 316022, China; National-Local Joint Engineering Laboratory of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Ocean University, Zhoushan, 316022, China. College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China. College of Petrochemical and Environment, Zhejiang Ocean University, Zhoushan, 316022, China; Zhejiang Provincial Key Laboratory of Petrochemical Pollution Control, Zhejiang Ocean University, Zhoushan, 316022, China; National-Local Joint Engineering Laboratory of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Ocean University, Zhoushan, 316022, China. Electronic address: chendz@zjou.edu.cn"
Journal Title:		Chemosphere
Year:		2023
Volume:		20221215
Issue:
Page Number:		137542 -
DOI:		10.1016/j.chemosphere.2022.137542
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"The treatment of waste-gas containing chlorinated volatile organic compounds (CVOCs) has become a difficult issue in current air pollution control. Biotrickling filters (BTFs) have been recognized to be applicable for the treatment of CVOCs, but research on the biodegradation of binary gaseous CVOCs is rare. Herein, a BTF inoculated with Methylobacterium (M.) rhodesianum H13, Starkeya sp. T-2 and activated sludge was established to investigate the biodegradation of the gaseous dichloromethane (DCM) and 1,2-dichloroethane (1,2-DCE) and their interactions implicated. The bioaugmented BTF showed a faster startup (13 days), better removal efficiencies of DCM (80%) and 1,2-DCE (72%), and superior mineralization (65.9%) than that inoculated with activated sludge alone. The ECs of DCM and 1,2-DCE were positively related with the inlet load when the total inlet load was <50 g m(-3) h(-1). However, inlet loads higher than 50 g m(-3) h(-1) led to dramatic drop of the RE of DCM and 1,2-DCE due to the limitation of the degradation capacity of microorganisms and the toxic effect of high-concentration substrates. Besides, BTF could stand a lower shock load of 400 mg m(-3), while higher shock loads would deteriorate the RE of DCM and 1,2-DCE. And BTF showed better impact resistance toward DCM than 1,2-DCE, probably because the 1,2-DCE biodegrading bacteria was more sensitive to the concentration change. For the same reason, the removal recovery of DCM after starvation was quicker than 1,2-DCE. Kinetic interactions were quantified by the EC-SKIP model, results of which revealed that DCM cast negative effect on 1,2-DCE biodegradation, while 1,2-DCE could promote DCM biodegradation. Moreover, both the results of real-time PCR and high-throughput sequencing showed M. rhodesianum H13 had stronger competitiveness and adaptability than Starkeya sp. T-2. The survived M. rhodesianum H13 and Starkeya sp. T-2 after starvation robustly demonstrated the success of bioaugmentation as well as its great potential of engineering application"
Keywords:		"*Volatile Organic Compounds/analysis Gases/analysis Sewage/microbiology Biodegradation, Environmental Methylene Chloride *Microbiota Bioreactors/microbiology Filtration/methods *Air Pollutants/analysis Binary gaseous CVOCs Bioaugmentation Biotrickling fil;"
Notes:		"MedlineLi, Qian Tang, Zeqin Ou Yang, Dujuan Zhang, Jiahui Chen, Jianmeng Chen, Dongzhi eng England 2022/12/19 Chemosphere. 2023 Feb; 313:137542. doi: 10.1016/j.chemosphere.2022.137542. Epub 2022 Dec 15"