微生物燃料电池回收氨氮合成微生物蛋白研究

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Abstract In this experiment, ammonium nitrogen in organic wastewater was recovered via microbial fuel cell (MFC). In MFC system, the recovery efficiency of ammonium nitrogen could reach 41.3%, along with electric energy of about 95.5J. The migration tendency of ammonium nitrogen matched well with Levenberg-Marquardt equation (R²>0.95). Subsequently, microbial protein (MP) was synthesized by hydrogen oxidizing bacteria (HOB), using CO₂ and the extracted nitrogen from MFC. The CO₂ sequestration rate was about 1.1LCO₂/(L×d) and dry cell weight in HOB system was 2.41g/L. The protein content was 49.4%, and the production of amino acids was 1.19g/L. The amino acid content of MP produced in this experiment was higher than that of the Clupanodom punchtatus. Also, the amino acid species were more abundant than that of the plant protein feeds. Thus, MP performs the potential on market competitiveness and practical application. In this experiment, CO₂ and nitrogen from wastes could be used for providing green and sustainable protein supply source, which played a positive role in promoting the resource utilization of organic wastewater.

Key words： bio-electrochemical system hydrogen oxidizing bacteria microbial protein ammonium nitrogen

Received: 25 July 2022

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X703.1

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	Articles by authors
	LI Xiao-yue
	WANG Yue
	JIA Pei
	LI Ya-jie
	CHEN Jia-qi
	JIN Li-jun
	WANG Wen
	YANG Zi-yi

Cite this article:

LI Xiao-yue,WANG Yue,JIA Pei等. Microbial protein production by using nitrogen extracted from microbial fuel cells[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(3): 1152-1159.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I3/1152

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