多因素对ANAMMOX菌利用零价铁还原硝酸盐过程影响

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Abstract Effects of iron form, pH, temperature and Fe/N on the process of ANAMMOX bacteria strengthening nitrate reduction by zero-valent iron (Fe⁰) were studied by single factor control experiment combined with Central Composite Design (CCD) methodology. The results demonstrated that the test with nano-Fe⁰ addition showed the highest nitrate removal efficiency compared with the iron powder and iron filings addition. According to the CCD analysis, the temperature and Fe/N had significant effects on the nitrate removal efficiency, while the effect of pH was weak. The optimum reaction conditions predicted based on CCD analysis were initial pH of 4.00, temperature of 35.00℃, and Fe/N of 38.23. The predictive nitrate removal efficiency was 94.70%, which was closed to the actual experimental value of 88.99%.

Key words： ANAMMOX nitrate zero-valent iron (Fe⁰) Central Composite design (CCD) methodology

Received: 08 April 2019

PACS:

X703.1

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	Articles by authors
	SONG Ge
	ZHANG Wen-jing
	BI Zhen
	HUANG Yong
	DONG Shi-yu

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SONG Ge,ZHANG Wen-jing,BI Zhen等. Effects of multiple factors on the process of ANAMMOX bacteria strengthening nitrate reduction by zero-valent iron[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4666-4672.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4666

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