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Article

Correlating Microbial Community Characteristics with Environmental Factors along a Two-Stage Biological Aerated Filter

by 1,†, 2,†, 3,*, 1 and 1
1
School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
2
Department of Water Conservancy Engineering, Tianjin Agriculture University, Tianjin 300384, China
3
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work and should be considered co-first authors.
Water 2020, 12(12), 3317; https://doi.org/10.3390/w12123317
Received: 21 September 2020 / Revised: 6 November 2020 / Accepted: 17 November 2020 / Published: 26 November 2020
(This article belongs to the Section Wastewater Treatment and Reuse)
The purification effect of a biological aerated filter (BAF) mainly comes from the microorganisms in the reactor. Understanding the correlation between microbial community characteristics and environmental factors along the filter has great significance for maintaining good operation and improving the removal efficiency of the filter. A two-stage BAF was employed to treat domestic sewage under organic loads of 1.02 and 1.55 kg/m3·d for 15 days each. 16S rDNA high-throughput sequencing technology and redundancy analysis were applied to explore the correlation between microbial community characteristics and environmental variables. The results showed that: (1) the crucial organic-degrading bacteria in the A-stage filter were of the genus Novosphingobium, which had a significant increase in terms of relative abundance at sampling outlet A3 (135 cm of the filling height) after the increase of organic load; (2) the microbial communities at different positions in the B-stage filter were similarly affected by environmental factors, and the main bacteria associated with nitrogen removal in the B-stage filter were Zoogloea and Rhodocyclus; and (3) to improve the pollutant removal performance of this two-stage biological aerated filter, a strategy of adding an internal circulation in the B-stage filter can be adopted. View Full-Text
Keywords: microbial community characteristics; environmental factors; two-stage biological aerated filter; redundancy analysis microbial community characteristics; environmental factors; two-stage biological aerated filter; redundancy analysis
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MDPI and ACS Style

An, Y.; Li, S.; Wang, X.; Liu, Y.; Wang, R. Correlating Microbial Community Characteristics with Environmental Factors along a Two-Stage Biological Aerated Filter. Water 2020, 12, 3317. https://doi.org/10.3390/w12123317

AMA Style

An Y, Li S, Wang X, Liu Y, Wang R. Correlating Microbial Community Characteristics with Environmental Factors along a Two-Stage Biological Aerated Filter. Water. 2020; 12(12):3317. https://doi.org/10.3390/w12123317

Chicago/Turabian Style

An, Yuchen, Songmin Li, Xiaoling Wang, Yuyang Liu, and Ruonan Wang. 2020. "Correlating Microbial Community Characteristics with Environmental Factors along a Two-Stage Biological Aerated Filter" Water 12, no. 12: 3317. https://doi.org/10.3390/w12123317

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