Effects of Temperature on the Characteristics of Nitrogen Removal and Microbial Community in Post Solid-Phase Denitrification Biofilter Process

Qian Zhang, Xue Chen, Wandong Luo, Heng Wu, Xiangyang Liu, Wang Chen, Jianhong Tang and Lijie Zhang
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Qian Zhang: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Xue Chen: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Wandong Luo: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Heng Wu: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Xiangyang Liu: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Wang Chen: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Jianhong Tang: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Lijie Zhang: School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, China

IJERPH, 2019, vol. 16, issue 22, 1-15

Abstract: In order to solve the problems of high energy consumption, complex process and low nitrogen removal efficiency in the currently available low carbon source wastewater treatment processes, a novel coagulation sedimentation/post-solid-phase denitrification biofilter process (CS-BAF-SPDB) was proposed. The effect of temperature on the nitrogen removal performance of BAF-SPDB was intensively studied, and the mechanism of the effect of temperature on nitrogen removal performance was analyzed from the perspective of microbial community structure by using the polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE). The results showed that, to realize favorable nitrifying and denitrifying performance simultaneously in the BAF-SPDB unit, the operation temperature should be set above 18 °C. In addition, the influence of the macro operation parameters on the performance of the BAF and SPDB has a direct relationship with the dynamic changes of the micro microbial community. The influence of temperature on nitrification performance in BAF was mainly embodied in the change of composition, amount and activity of ammonia oxidizing bacteria Candidatus Nitrospira defluvii and nitrite oxidizing bacteria Nitrosomonas sp. Nm47 , while that on denitrification performance in SPDB is mainly embodied in the change of composition and amount of solid carbon substrate degrading denitrifying bacteria Pseudomonas sp., Myxobacterium AT3-03 and heterotrophic denitrifying bacteria Dechloromonas agitate , Thauera aminoaromatica , Comamonas granuli and Rubrivivax gelatinosus .

Keywords: biodegradable polymers; gas/water ratio; microbial community; PCR-DGGE; post solid-phase denitrification (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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