铁碳自养反硝化高效去除厌氧氨氧化出水硝酸盐氮效能分析

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Abstract The investigation of nitrate removal from anammox effluent using the iron-carbon autotrophic denitrification process, involved the examination of continuous operation, iron precipitation transformation, and microbial community structure. The study revealed the coupling mechanism between the iron-carbon carrier and biofilm, demonstrating the efficient removal of nitrate through the iron-carbon autotrophic denitrification process. At HRT of 16.6h, the total nitrogen (TN) removal efficiency of anammox effluent was found to be (90.0±4.7) %. Conversely, the TN removal rate of anammox effluent was (82.2±1.4) % at HRT of 13.3h. During Stage I, Fe₃O₄ was identified as the predominant form of iron precipitation within the biofilm, whereas in Stage III, there was a decrease in Fe₃O₄ and an increase in the density of FeOOH type iron precipitation. Throughout the iron-carbon autotrophic denitrification process, the prevalence of Dechloromonas, the primary denitrifying bacterium in the initial sludge inoculum, experienced a notable decrease. Conversely, there was an enrichment of autotrophic denitrifying bacteria and iron-converting bacteria, exemplified by the rise in relative abundance of Thermomonas from 0.70% on day 43 to 4.51% on day 120.

Key words： iron-carbon carrier biofilm autotrophic denitrification iron precipitation microbial community

Received: 13 January 2024

PACS:

X703

Corresponding Authors: 姚宏,教授,hyao@bjtu.edu.cn E-mail: hyao@bjtu.edu.cn

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	Articles by authors
	XING Wei
	LI Long-sheng
	GAO Dao-qing
	Zhang Ze-xi
	ZHOU Guang-xin
	YAO Hong

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XING Wei,LI Long-sheng,GAO Dao-qing等. Performance analysis of iron-carbon autotrophic denitrification for efficient removal of nitrate from anammox effluent[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(8): 4400-4406.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I8/4400

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