两级PNDPR耦合Anammox脱氮除磷工艺研究

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Abstract Considering that the influent of Anammox process must contain two substrates, NO₂^--N and NH₄⁺-N, and it could only be denitrified. In order to further realize phosphorus removal on this basis, this study proposed to combine phosphorus removal and nitrogen removal with partial nitrification technology, namely partial nitrification and denitrifying phosphorus removal tandem Anammox process:the partial nitrification and denitrification phosphorus removal unit was the first to pass into domestic sewage to convert NH₄⁺-N to NO₂^--N and remove part of COD. Part of the effluent was mixed with domestic sewage and enters the anaerobic ammonium oxidation unit. At the same time, the partial nitrification and denitrification phosphorus removal unit was denitrified and absorbed phosphorus under the hypoxia state, and the effluent of the two treatment units was mixed and discharged after the end of the reaction. The experimental results showed that controlling the influent mixing ratio to be 4.2 could ensure that the values of C/N and NO₂-N/NH₄⁺-N in the Anammox unit were 2 and 1.5, respectively, the average △NO₂^--N/△NH₄⁺-N=1.41, △NO₃^--N/△NH₄⁺-N=0.12, Anammox nitrogen 85.2% on average, denitrification and Anammox coupling reaction was good. After stable operation of the whole system, the effluent COD, P, NH₄⁺-N, NO₂^--N and NO₃^--N concentrations were 15.2, 0.85, 0.59, 5.56 and 3.33mg/L, respectively, and the TN removal rate was 89.4%. The PNDPR-Anammox coupling new process successfully realized the efficient treatment of simulated domestic sewage.

Key words： short-cut nitrification anaerobic ammonia oxidation denitrifying phosphorus removal influent mixing ratio

Received: 01 April 2021

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X703

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	XU Gui-da
	LI Dong
	LIU Zhi-cheng
	TAO Bo
	ZHANG Jie

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XU Gui-da,LI Dong,LIU Zhi-cheng等. Study on two-stage PNDPR coupled with Anammox for nitrogen and phosphorus removal[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(11): 5133-5141.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I11/5133

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