城市污水A<sup>2</sup>/O处理系统好氧池N<sub>2</sub>O和NO的释放特征及影响因素

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Abstract

In this study, online N₂O and NO analyzer were used to monitor N₂O and NO emissions in different zones of the aeration tank of a municipal wastewater treatment plant. Parameters such as ammonia, nitrite, nitrate, dissolved oxygen (DO) and pH were also measured to reveal their influence on N₂O and NO emissions. The results showed that the DO concentration of the aeration tank was between 0.24 mg/L and 1.12 mg/L, and mostly at approximately 0.6 mg/L. The low DO concentration led to the nitrite accumulation along the aeration tank. The N₂O and NO emission rose along the aerobic tank and ultimately reached the maximum value at the end of the aeration tank. Besides, NO emission was significantly and positively correlated with the nitrite concentration, while the N₂O emission was less significant. The N₂O and NO emission factors of the wastewater treatment plant were 6.3~8.83% and 0.033~0.034% of influent ammonia.

Key words： nitrous oxide nitric oxide nitrification spatial variations nitrite concentration

Received: 10 August 2015

PACS:

X703.1

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	HAN Hai-cheng
	ZHOU Dong
	WANG Ya-yi
	CHEN Jie
	SONG Cheng-kang

Cite this article:

HAN Hai-cheng,ZHOU Dong,WANG Ya-yi等. The emission characteristics of nitrous oxide and nitric oxide and related influence factors in an aeration tank of a municipal wastewater treatment plant using an A²/O process[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(2): 398-405.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I2/398

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