间歇曝气对部分硝化-厌氧氨氧化处理氨氮废水的影响

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Abstract A one-stage PN/A(partial nitrification coupled with anaerobic ammonia oxidation) process was successfully implemented using a lab-scale MBBR reactor with the intermittent aeration. The total nitrogen removal efficiency reached 83.74% under the condition of 35℃, 150.00 mg/L influent ammonia nitrogen, 0.24 kg/(m³·d) influent nitrogen loading rate and(1.41±0.24)mg/L DO concentration. The maximum activity of anaerobic ammonia oxidizing bacteria(AnAOB) and ammonia oxidizing bacteria(AOB) in biofilms were 3792.00 and 5166.00 mg/(m²·d), respectively, while nitrite oxidizing bacteria(NOB) activity was not detected. The results of high throughput analysis showed that the AnAOB was mainly Candidatus Brocadia with a relative abundance of 1.33%,and the dominated AOB and NOB were Nitrosomonas at 0.17% relative abundance and Nitrospira at 0.003% relative abundance,respectively. The efficient PN/A process could be achieved in MBBR reactors at moderate ammonia-nitrogen concentration, and the augmentation of DO concentrations by the intermittent aeration could effectively improve the nitrogen removal performance.

Key words： one-stage partial nitrification ANAMMOX MBBR intermittent aeration

Received: 05 July 2021

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X703.1

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	ZHOU Meng-yu
	PENG Dang-cong
	HAN Yun
	Lü Kai

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ZHOU Meng-yu,PENG Dang-cong,HAN Yun等. Partial nitrification-anaerobic ammonia oxidation for the treatment of moderately concentrated ammonia-nitrogen wastewater: Effect of intermittent aeration on nitrogen removal performance[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1120-1127.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I3/1120

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