Journal
BIORESOURCE TECHNOLOGY
Volume 240, Issue -, Pages 84-93Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.01.053
Keywords
Traditional Chinese medicine wastewater; Anaerobic-anoxic-aerobic combined process; UV254; Microbial community; Illumina MiSeq Sequencing
Funding
- National Science and Technology Major Project of China [2012ZX07205002]
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Biodegradation of traditional Chinese medicine (TCM) wastewater was investigated in a pilot-scale anaerobic-anoxic-aerobic combined process, which was composed of an expanded granular sludge blanket (EGSB) reactor, a hydrolysis acidification (HA) reactor and a biological contact oxidation (BCO) reactor. In stable stage, the average values of COD and color in the combined process effluent were 45.7 mg L-1 and 13 times, respectively. Excellent linear relations (R-2 > 0.915) were achieved between color and UV254 at three color levels. Comprehensive community structures of the combined process were analysed by Illumina MiSeq Sequencing, which revealed that microbial community in the aerobic reactor had the greatest diversity and richness. Bacteroidetes, Firmicutes and Proteobacteria were dominant phyla in the three reactors, and Bacteroidales, Geobacter, ZB2 were the predominant functional microorganisms in the anaerobic, anoxic and aerobic reactors, respectively. Good removal efficiencies and presence of core microorganisms confirmed that the combined process was feasible for treating TCM wastewater. (C) 2017 Elsevier Ltd. All rights reserved.
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