Enhanced direct interspecies electron transfer and methane production during anaerobic digestion of fat, oil, and grease by coupling carbon-based conductive materials and exogenous hydrogen
Enhanced direct interspecies electron transfer and methane production during anaerobic digestion of fat, oil, and grease by coupling carbon-based conductive materials and exogenous hydrogen
复制标题
通过耦合碳基导电材料和外源氢，增强脂肪、油和油脂厌氧消化过程中的直接种间电子转移和甲烷产生
DOI：
10.1016/j.biortech.2022.128083
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发表时间：
2022-10-10
影响因子：
11.4
通讯作者：
Wang, Chun
中科院分区：
文献类型：
--
作者：
He, Xia;Xu, Weijia;Wang, Chun
选择了基于脂肪，油和油脂（FOG）甲烷回收的碳基导电材料和外源氢（EH2）的组合，选择了与EH2合作的颗粒，颗粒状活性碳（GAC）和碳布（CC），从而产生在增加甲烷的产量中，分别增加了59％和84％。长链脂肪酸（LCFA）的进一步消化证实，与仅具有GAC/CC的反应器相比，在具有GAC/CC + EH2的反应器中，可以实现增强的直接种间电子转移（饮食）。发现其他证据（例如，微生物种群增加和挥发性脂肪酸的快速降解）支持GAC/CC + EH2在促进饮食中的作用。使用GAC/CC + EH2观察到微生物群落的显着变化，这主要归因于富集电气物种（例如螺旋藻科，副神经胶质膜棕榈酸酯和甲酸酯），从而导致在酸中发生和甲壳发生过程中代谢途径的某些变化。 GAC/CC + EH2共同获得了增强的饮食，从而改善了从雾中恢复的甲烷。
To investigate the combination of carbon-based conductive materials and exogenous hydrogen (EH2) on methane recovery from fat, oil, and grease (FOG), granular activated carbon (GAC) and carbon cloth (CC) were chosen to collaborate with EH2, resulting in increased methane production by 59 % and 84 %, respectively. Further digestion of long chain fatty acids (LCFAs) confirms that enhanced direct interspecies electron transfer (DIET) was achieved in the reactors with GAC/CC + EH2 than those with GAC/CC only. Other evidences (such as increased microbial population and rapid degradation of volatile fatty acids) were found to support the role of GAC/CC + EH2 in promotion of DIET. Significant change of microbial community was observed using GAC/CC + EH2, which was mainly attributed to the enrichment of electrogenic species (such as Spirochaetaceae, Syn-trophomonas palmitatica, and Methanosaeta), leading to some changes in metabolic pathways during acidogenesis and methanogenesis. Together, enhanced DIET was achieved by GAC/CC + EH2, thus improving the methane recovery from FOG.