城市生活污水SNAD生物膜脱氮特性

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Abstract

The nitrogen removal performance of simultaneous partial nitrification, anaerobic ammonium oxidization and denitrification (SNAD) biofilm was investigated in batch tests. The SNAD biofilm performed good anammox and denitrification activities. The NH₄⁺-N, NO₂^--N and total inorganic nitrogen (TIN) removal rates of anammox activity were 0.121, 0.180 and 0.267kg N/(kg VSS·d), respectively. The denitrification and nitrite oxidation activities were 0.211 and 0.053kg NO₂^--N/(kg VSS·d), respectively. The suitable pH ranges for anammox activity were 5.0 to 9.0. The the inhibition effect of pH on the anammox bacteria could be largely relieved by biofilm. Besides, the SNAD biofilm was found to perform high tolerance to the inhibition of NO₂^--N and free nitrous acid (FNA). The NH₄⁺-N removal rates for anammox process were 0.087 and 0.029kg N/(kg VSS·d) with the NO₂^--N concentrations of 100mg/L (FNA concentration of 70μg/L) and 150mg/L (FNA concentration of 100μg/L), respectively. The SEM observations indicated that the bacteria in the outer part of the SNAD biofilm were mainly short rod-shaped. In the inner part of the SNAD biofilm, the bacteria were mainly crater-shaped, which should be anammox bacteria.

Key words： SNAD biofilm nitrogen removal performance anammox nitrite effect of pH

Received: 01 August 2016

PACS:

X703.5

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	Articles by authors
	ZHENG Zhao-ming
	LI Jun
	HOU Ai-yue
	MA Jing
	DU Jia
	ZHAO Bai-hang
	YANG Jing-yue

Cite this article:

ZHENG Zhao-ming,LI Jun,HOU Ai-yue等. Nitrogen removal performance of SNAD biofilm cultured by domestic wastewater[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(4): 1322-1330.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I4/1322

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