氨氮对厌氧氨氧化过程的抑制规律及调控策略

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Abstract

NH₄⁺-N was one of the important substrate for ANAMMOX bacteria. But instable nitrogen removal process often occurred and microbial activity even had inhibited by using ANAMMOX bacteria, because of high substrate concentration. In order to effectively avoid NH₄⁺-N inhibition to anammox bacteria activity, the effect of NH₄⁺-N on the activity of anammox bacteria was analysis by inhibitor morphology, main influence factors and inhibiting regularity. The results showed that temperature and pH were important impact on morphology and concentration changes between NH₄⁺-N and FA. The ANAMMOX activity was recovered after 44h operation when the pH was decreased from 7.9 to 7.3under the influent concentration of NH₄⁺-N was fixed at 500mg/L. Half maximal inhibitory concentration (IC₅₀) of FA on ANAMMOX was different when the influent concentration of NH₄⁺-N was variety. IC₅₀ of FA and inhibitory time under different NH₄⁺-N concentrations have relationship (y=732.38x^-0.89). Thus, we avoided the effect of FA on activity of anammox bacteria by changing the pH when the influent concentration of NH₄⁺-N was constant. Besides pH decreased, HRT can also be shortened to avoid the effect of FA on activity of ANAMMOX bacteria, when the influent concentration of NH₄⁺-N was fluctuate.

Key words： Anammox free ammonium half maximal inhibitory concentration control Strategy

Received: 09 January 2017

PACS:

X703.1

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	Articles by authors
	YUAN Yan
	ZHOU Zheng
	LIN Xin
	WANG Fan
	LI Xiang
	GU Chen-wei
	ZHU Liang

Cite this article:

YUAN Yan,ZHOU Zheng,LIN Xin等. Inhibiting regularity and control strategy of NH₄⁺-N on ANAMMOX Process[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(9): 3309-3314.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I9/3309

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