不同C/N条件下排水管道生物膜中氮分布特性

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Abstract In order to explore the nitrogen transport and transformation mechanism of the biofilm in the drainage pipeline, the effect of different C/N on the denitrification process of the biofilm are studied. The biofilms of drainage pipes were cultured under the condition that C/N were 2, 5, 10, respectively. Distribution regularities of NH₄⁺, NO₂^-, NO₃^- inside the mature biofilms were studied using micro electrode technology. Results showed that biofilm thickness were (1.7±0.1), (1.9±0.1), (2.0±0.1) mm when C/N were 2, 5, 10, respectively, the concentration of DO, NH₄⁺ and NO₃^- in the depth direction of biofilm gradually decreased while NO₂^- concentration gradually increased. Under three different C/N conditions, the concentration distribution of the substance within the biofilm showed significant differences. Biofilm thickness affected the distribution of dissolved oxygen, which then affected the N transformation processes in the biofilms.

Key words： pipeline biofilm micro electrode dissolved oxygen denitrification

Received: 02 May 2017

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	Articles by authors
	AI Hai-nan
	MA Rui-xiang
	HE Qiang
	XU Jing-wei
	WANG Yin-liang

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AI Hai-nan,MA Rui-xiang,HE Qiang等. The distribution characteristics of nitrogen element in biofilm on drainage pipe under different C/N conditions[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4549-4555.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4549

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