利用H<sup>+</sup>浓度变化控制含Cl<sup>-</sup>的氨氮废水的电解时间

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Abstract The indirect electrochemical oxidation method was used to treat high or medium concentration ammonia nitrogen wastewater containing Cl^-. The change of H⁺ concentration of wastewater was used to control the electrolysis time of different concentration ammonia nitrogen wastewater. Based on theoretical calculation and electrolytic analysis of simulated and actual ammonia nitrogen wastewater, it was found that when the ammonia nitrogen in wastewater had not been completely degraded, one H⁺ would be generated in the degradation process of each NH₄⁺, c(H⁺) would rise linearly with time; when the ammonia nitrogen just completely degraded, c(H⁺) would reach the maximum value; after that, when the electrolysis continued and the pH of wastewater was less than 7, the OH^- formed in the electrolysis process would continue to consume H⁺, and c(H⁺) declined linearly with time. Using pH meter to monitor the pH of waste water in real time, and through the program-controlled signal converter, the pH value signal was converted into c(H⁺) signal, which could improve the accuracy and sensitivity of decision-making.

Key words： ammonia nitrogen treatment electrochemical oxidation pH value change hydrogen ion concentration electrolysis time decision making

Received: 08 April 2020

PACS:

X703.1

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	Articles by authors
	MO Heng-liang
	CHEN Yi-li
	WEN Jian-ping
	YU Kai-chang
	WU Wen-hui
	WAN Ping-yu
	TANG Yang
	LI Suo-ding

Cite this article:

MO Heng-liang,CHEN Yi-li,WEN Jian-ping等. Control of electrolysis time of ammonia nitrogen wastewater containing Cl^- by H⁺ concentration change[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(12): 5325-5330.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I12/5325

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