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Evaluation of inocula and Packing Material for Acceleration of Start-Up in Biofilters

China Petroleum Processing & Petrochemical Technology 2019年第2期21卷 67-75页

作者： Li Chao Zhao Dongfeng Mu Guiqin Song Xiangning Zhang Tingting Liu Jun SINOPEC Research Institute of Safety Engineering Qingdao 266000 Department of Environmental and Safety Engineering China University of Petroleum (East China)266580 Qingdao Oasis Environmental & Safety Technology Co. Ltd. Qingdao 266555 Center for Safety Environmental & Energy Conservation Technology China University of Petroleum (East China) Qingdao 266555 Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao 266237

Several strategies with different combination of inocula and packing material were investigated to obtain the optimal start-up time and elimination capacity (EC) in toluene biofiltration. The inocula contained the activated sludge and toluene degrading bacteria, and the packing material consisted of different mixing ratios of peat and wood chips. A final toluene load of 21.2 g/(m3·h) was attained step by step in four parallel biofilters. A shortest start-up time of 15 days and a highest EC of 17.0 g/(m3·h) were observed in the biofilter B-4, which was inoculated with a special microbial consortium consisting of three strains of toluene degrading bacteria and was packed with the mixture of peat and wood chips at a ratio of 80:20 (w/w). These results indicated that inoculating pre-acclimatized microbes dramatically shortened the start-up time, and such a composition of packing material could maintain an appropriate environment (with the bed porosity and water content equating to 0.45 and 1.96, respectively) for the growth of dominant toluene degrading bacteria in the biofilter.

关键词： acceleration of start-up biofilter inocula packing material

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