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Sci Rep. 2018 Mar 15;8(1):4566. doi: 10.1038/s41598-018-22683-1.

Seasonal bacterial community succession in four typical wastewater treatment plants: correlations between core microbes and process performance.

Zhang B1, Yu Q2, Yan G3, Zhu H4, Xu XY1,2, Zhu L5,6.

Author information

1
Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China.
2
Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou, 310058, China.
3
Hangzhou Drainage Co., LTD, East City Water Treatment Branch, Hangzhou, 310018, China.
4
Shangyu Wastewater Treatment Plant, Shangyu, 312369, China.
5
Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China. felix79cn@hotmail.com.
6
Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou, 310058, China. felix79cn@hotmail.com.

Abstract

To understand the seasonal variation of the activated sludge (AS) bacterial community and identify core microbes in different wastewater processing systems, seasonal AS samples were taken from every biological treatment unit within 4 full-scale wastewater treatment plants. These plants adopted A2/O, A/O and oxidation ditch processes and were active in the treatment of different types and sources of wastewater, some domestic and others industrial. The bacterial community composition was analyzed using high-throughput sequencing technology. The correlations among microbial community structure, dominant microbes and process performance were investigated. Seasonal variation had a stronger impact on the AS bacterial community than any variation within different wastewater treatment system. Facing seasonal variation, the bacterial community within the oxidation ditch process remained more stable those in either the A2/O or A/O processes. The core genera in domestic wastewater treatment systems were Nitrospira, Caldilineaceae, Pseudomonas and Lactococcus. The core genera in the textile dyeing and fine chemical industrial wastewater treatment systems were Nitrospira, Thauera and Thiobacillus.

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