驯化底物对微生物电解池降解丁酸型发酵液的影响

柏艺博; 孙杏; 胡凯; 陈卫; 许航

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中国环境科学 ›› 2026, Vol. 46 ›› Issue (2) : 749-757.

水污染与控制

驯化底物对微生物电解池降解丁酸型发酵液的影响

柏艺博^1,2, 孙杏³, 胡凯^1,2, 陈卫^1,2, 许航^1,2

作者信息 +

Effect of acclimation substrates on the degradation of butyric acid fermentation broth in microbial electrolysis cells

BAI Yi-bo^1,2, SUN Xing³, HU Kai^1,2, CHEN Wei^1,2, XU Hang^1,2

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文章历史 +

摘要

针对微生物电解池(MEC)处理剩余污泥丁酸型发酵液有机质降解率低的问题,探讨了丁酸驯化对丁酸型发酵液降解及微生物群落的影响,分析了电化学特性、产气性能、有机物去除和微生物群落结构响应.结果表明,丁酸钠驯化有效提高了系统的稳定输出电流密度,提升了产气速率.驯化后处理丁酸型发酵液时,该系统表现出更高的电流密度峰值(19A/m³)、更显著的氧化峰(峰值电流78.1mA)和更高的有机物降解率(SCOD去除率58.67%,VFAs去除率41.76%),能量回收率达118.8%.机制分析表明,丁酸钠驯化有效富集了丁酸氧化菌(Syntrophomonas),形成了比乙酸钠驯化系统更高效的代谢路径,从而强化了丁酸型发酵液的降解.

Abstract

In order to improve the degradation efficiency of microbial electrolysis cells (MECs) treating butyric acid fermentation broth from excess sludge, this study investigated the influence of butyrate acclimation on degradation and microbial communities, with a focus on the changes of electrochemical characteristics, gas production, organics removal, and microbial community structure. Results showed that sodium butyrate acclimation enhanced current density and gas production rate during stable operation period. Moreover, when treating butyric acid fermentation broth, the acclimated system achieved higher peak current density (19A/m³), higher oxidation peak (78.1mA), and higher organics degradation rate (SCOD removal of 58.67%; VFAs removal of 41.76%), with energy recovery attaining 118.8%. Mechanism analysis revealed that sodium butyrate acclimation effectively enriched butyrate-oxidizing bacteria (Syntrophomonas), establishing more efficient metabolic pathway in comparison with sodium acetate acclimation, thereby ameliorating the degradation of butyric acid fermentation broth.

导出引用

柏艺博, 孙杏, 胡凯, 陈卫, 许航. 驯化底物对微生物电解池降解丁酸型发酵液的影响[J]. 中国环境科学. 2026, 46(2): 749-757

BAI Yi-bo, SUN Xing, HU Kai, CHEN Wei, XU Hang. Effect of acclimation substrates on the degradation of butyric acid fermentation broth in microbial electrolysis cells[J]. China Environmental Science. 2026, 46(2): 749-757

中图分类号： X703

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