WFSI处理低C/N比养猪废水的效果及脱氮机制

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Abstract

In order to treat piggery wastewater with high ammonium density and low C/N ratio, a wood-chip-framework soil infiltrator (WFSI) was constructed and its performance in COD, NH₄⁺-N and TN removal was investigated, while the mechanism for denitrification was analyzed. The infiltrator was started up at a hydraulic surface loading rate of 0.2 m³/m²·d and temperature (25±1)℃, and could get steady in performance within 30 days. The results showed that COD, NH₄⁺-N and TN removal in the infiltrator were about 61.7%, 85.0% and 36.3%, respectively, as against a feed concentration which ranged 160~359, 253~298 and 317~374 mg/L, respectively. Heterotrophic denitrification and ANAMMOX were identified as the denitrification approaches in the WFSI, and the contribution of ANAMMOX to the TN removal was more than 42.3%. The COD, NH₄⁺-N and TN removal in the infiltrator were about 61.7%, 85.0% and 36.3%, respectively, as against a ranged feed concentration of 160~359, 253~298 and 317~374mg/L, respectively.

Key words： piggery wastewater ammonium low C/N ratio soil infiltrator denitrification

Received: 21 May 2015

PACS:

X703.1

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	Articles by authors
	DENG Kai-wen
	LI Jian-zheng
	ZHAO Bo-wei

Cite this article:

DENG Kai-wen,LI Jian-zheng,ZHAO Bo-wei. Efficiency and denitrification mechanism in a wood-chip-framework soil infiltrator treating piggery wastewater with low C/N ratio[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(1): 87-91.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I1/87

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