期刊
DESALINATION AND WATER TREATMENT
卷 57, 期 41, 页码 19096-19105出版社
DESALINATION PUBL
DOI: 10.1080/19443994.2015.1100556
关键词
Coking wastewater; Aromatic compounds; Biological degradation; Microbial community; Pyrosequencing
资金
- National Natural Science Foundation of China [31370281]
- Fundamental Research Funds for the Central Universities of China University of Mining and Technology (Beijing) [2010YH05]
- National Science and Technology Support Project [2011BAC06B09]
- National Water Pollution Control and Treatment Science and Technology Major Projec [2012ZX07202006]
Coking wastewater is one of the most toxic industrial effluents since it contains high concentration of toxic organic compounds. Biological treatments are widely applied in coking wastewater treatment, pollutants can be degraded completely due to the synergistic effect of the community composition. In this study, the community structure and degradation of organic compounds of a full-scale coking wastewater treatment plant with anaerobic, anoxic, and oxic process (A(1)/A(2)/O) were studied. GC-MS results showed that phenols, indole, quinoline and pyridine, accounting for 61.70, 13.63, 7.71 and, 2.30%, respectively, were the main organic pollutants in the raw coking wastewater. Those pollutants were degraded gradually during the A(1)/A(2)/O bioprocess, respectively. High throughput pyrosequencing was applied to investigate the bacterial community, the sequences could be affiliated to 21 phylogenetic groups, including Proteobacteria, Chloroflexi, Bacteroidetes, Planctomycetes, Synergistetes, Chlorobi, Acidobacteria, Nitrospira, Firmicutes, and Actinobacteria. Diversity and richness indexes, venn analysis and principal component analysis indicated that the diversity and abundance of species in three samples were different. The abundance of the phylum Proteobacteria accounted for 84.64% (A(1)), 62.73% (A(2)), and 83.24% (O) of the total reads, respectively. The corresponding most dominant orders in three samples were Pseudomonadales (A(1)), Syntrophobacterales (A(2)), and Burkholderiales (O), respectively. While genus Pseudomonas, Desulfoglaeba, and Diaphorobacter was the dominant bacterium in three samples, respectively.
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