期刊
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
卷 116, 期 -, 页码 405-412出版社
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.psep.2018.03.019
关键词
1,2-Dichloroethane; Hydrophobic mixed culture; Batch-mode biodegradation; Kinetic analysis; Waste gas treatment; Two-phase partitioning airlift bioreactors
资金
- National Natural Science Foundation of China [51608475]
- Science and Technology Projects of Zhejiang Province [2015C31011, 2017C03007]
- Open Fund Project of Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration [XTCX-001]
Recent studies highlighted that hydrophobic microorganisms played key roles in VOC removal performance of two-phase partitioning bioreactors (TPPBs). The objective of this study was to evaluate the performance of a hydrophobic mixed culture for 1,2-dichloroethane (1,2-DCA) biodegradation in both batch and TPPB tests. The hydrophobic mixed culture with cell surface hydrophobicity of 79% was acclimated from an activated sludge able to efficiently degrade 1,2-DCA as sole carbon and energy source. It was primarily composed of Xanthobacter genus (62%). Nearly complete degradation with coefficients of 0.80 mg(co2) mg(1,2-DCA)(-1) and 0.66 mg(cl)(-) mg(1,2-DCA)(-1) was achieved for a wide range of 1,2-DCA concentrations (114.1-1141.5 mg L-1) in the presence of silicone oil. The maximum specific growth rate was 0.247 h(-1) which was approximately two times the values of previous pure strains. The two-phase partitioning airlift bioreactors inoculated with the hydrophobic mixed culture was robust against step changes of gas flow rates and spike changes of inlet 1,2-DCA concentrations. All data proved the potential of the hydrophobic mixed culture for toxic-VOC removal in the TPPBs. (C) 2018 Published by Elsevier B.V. on behalf of Institution of Chemical Engineers.
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