新型PD/A工艺同步处理低C/N生活原水和二级出水

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Abstract

Anovelfixed-bed biofilm process based on partial denitrification/anammox (PD/A) was developed for the simultaneous treatment of low C/N domestic wastewater and secondary effluent. The nitrogen removal performance of the process at different influent C/N (1.3, 1.5, 1.6, 1.8) and different pH (7.5, 8.0, 8.5, 9.0) was studied. Results showed that increasing influent C/N enhanced the complete denitrification of the system, whichincreased the average removal rate of NO₃^--N from 52.3% to 85.7%; The higher influent pH promoted theNO₂^--N accumulation in partial-denitrification process, and then enhanced the autotrophic nitrogen removal by the anammox, which increased the average removal rate of NH₄⁺-N from 82.2% to 89.7%. Under the conditions of C/N=1.6 and pH=9.0, 88.3% of TN removal rate was achieved, and the effluent TN was stable less than 2mg/L. Moreover, the potential of the fixed-bed biofilm process based on PD/Ain the upgrading of traditional AAO process was analyzed.

Key words： partial denitrification/anammox (PD/A) fixed-bed biofilm secondary effluent C/N pH

Received: 11 September 2019

PACS:

X703.1

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	Articles by authors
	CHEN Kai-qi
	ZHANG Liang
	SUN Shi-hao
	PENG Yong-zhen
	JIATi-pei

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CHEN Kai-qi,ZHANG Liang,SUN Shi-hao等. NovelPD/A processtotreat low C/N domestic wastewater and secondary effluent simultaneously[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1515-1522.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I4/1515

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