固相自养-异养反硝化脱氮同步去除微污染物

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Abstract Aiming at the solid-phase denitrification system, PCL/PS (polycaprolactone composite peanut shell) solid carbon source was used as the substrate, coupled with autotrophic denitrification dominated by S and FeO to construct a new multi-functional carbon source. The simultaneous degradation efficiency of typical micropollutant (Cr(Ⅵ), ClO₄^-, BPA, NPX) and nitrates was investigated, and the microbial community characteristics and micro-mechanism in the denitrification system of autotrophic heterotrophic coexistence were explored. The results showed that the PCL/PS heterotrophic denitrification system had better denitrification and simultaneous removal of Cr(VI) and BPA. The removal rates of NO₃^--N and Cr(VI) were 94% and 92%, respectively, and the removal rates of NO₃^--N and BPA were more than 99%. The simultaneous removal of ClO₄^- and NPX by denitrification and denitrification in the system of PCL/PS coupled with FeO and S was good and stable. Based on 90% denitrification rate, the removal rates of NO₃^--N and ClO₄^- were 90% and 96%, respectively, and the removal rates of NO₃^--N and NPX were 96% and 99%, respectively. Different solid carbon sources have different selectivity for the degradation and removal of micropollutant. The sequencing results showed that the microbial diversity and richness in the reaction system were improved after coupled autotrophic denitrification. Clostridium_sensu_strito, Lactococcus and Prevotella were the main dominant bacteria affecting the removal performance of pollutants in the four solid carbon source systems.

Key words： solid carbon autotrophic denitrification micropollutant synchronous removal

Received: 24 July 2023

PACS:

X703.1

Corresponding Authors: 刘彩虹,副教授,caihong.liu@cqu.edu.cn E-mail: caihong.liu@cqu.edu.cn

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	CAO Yang
	LIU Cai-hong
	CHEN Zi-wei
	LIU Qian-liang
	HE Qiang

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CAO Yang,LIU Cai-hong,CHEN Zi-wei等. Solid phase autotrophic-heterotrophic denitrification and simultaneously removal of trace pollutants[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1265-1277.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I3/1265

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