Field Research on Mixing Aeration in a Drinking Water Reservoir: Performance and Microbial Community Structure

Zizhen Zhou, Tinlin Huang, Weijin Gong, Yang Li, Yue Liu and Shilei Zhou
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Zizhen Zhou: School of energy and environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Tinlin Huang: School of environmental and municipal engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Weijin Gong: School of energy and environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Yang Li: School of energy and environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Yue Liu: School of energy and environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Shilei Zhou: School of environment science and engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

IJERPH, 2019, vol. 16, issue 21, 1-17

Abstract: Field research on the performance of pollutant removal and the structure of the microbial community was carried out on a drinking water reservoir. After one month of operation of a water-lifting aeration system, the water temperature difference between the bottom and the surface decreased from 9.9 to 3.1 °C, and the concentration of the dissolved oxygen (DO) in the bottom layer increased from 0 to 4.2 mg/L. The existing stratification in the reservoir was successfully eliminated. Total nitrogen (TN), total phosphorus (TP), and total organic carbon (TOC) concentrations were reduced by 47.8%, 66.7%, and 22.9%, respectively. High-throughput sequencing showed that Proteobacteria , Bacteroides, and Actinomycetes accounted for 67.52% to 78.74% of the total bacterial population. Differences in the bacterial changes were observed between the enhanced area and the control area. With the operation of the water-lifting aeration system, the populations of bacteria of the main genera varied temporally and spatially. Principal component analysis pointed out a clear evolution in the vertical distribution of the microbial structure controlled by the operation of the aeration system. Permutational analysis of variance showed a significant difference in the microbial community ( p < 0.01). Redundancy analysis showed that physical (water temperature, DO) and chemical environmental factors (Chl-a, TOC, TN) were the key factors affecting the changes in the microbial communities in the reservoir water. In addition, a hierarchical partitioning analysis indicated that T, Chl-a, ORP, TOC, pH, and DO accounted for 24.1%, 8.7%, 6.7%, 6.2%, 5.8%, and 5.1% of such changes, respectively. These results are consistent with the ABT (aggregated boosted tree) analysis for the variations in the functional bacterial community, and provide a theoretical basis for the development and application of biotechnology.

Keywords: drinking water reservoir; water-lifting aeration; microbial community; environmental factors (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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