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Enhancing methanogenesis from anaerobic digestion of propionate with addition of Fe oxides supported on conductive carbon cloth.
Bioresource Technology ( IF 11.4 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.biortech.2020.122796
Yanguang Xu 1 , Mingwei Wang 1 , Qilin Yu 1 , Yaobin Zhang 1
Affiliation  

In this study, a Fe2O3 supported on conductive carbon cloth (FC) was prepared and supplemented into anaerobic digestion reactors to improve propionate degradation. In the FC-supplemented reactors, the cumulative methane production and propionate degradation increased by 15.4% and 19.67% compared with those of the control, respectively. Less methane production with H2/CO2 as the sole substrate in the culture taken from the FC reactors suggested that interspecies hydrogen transfer in the FC reactors was weaker. These results suggested that direct interspecies electron transfer (DIET) was established in the FC reactors to improve the performance. Fe2O3 increased the secretion of electron shuttle components of extracellular polymeric substances to increase electron exchange capacity of biomass of the FC reactors, which further facilitated the DIET. Analysis on microbial communities confirmed that the abundance of microorganisms-related DIET in the FC reactors was higher than that in the control.

中文翻译:

通过添加负载在导电碳布上的Fe氧化物来增强丙酸厌氧消化的甲烷生成。

在这项研究中,制备了负载在导电碳布(FC)上的Fe2O3,并补充到厌氧消化反应器中以改善丙酸酯的降解。在装有FC的反应器中,与对照相比,累积的甲烷产量和丙酸酯降解分别增加了15.4%和19.67%。从FC反应器中提取的以H2 / CO2为唯一底物的甲烷产生量较少,这表明FC反应器中的种间氢转移较弱。这些结果表明,在FC反应堆中建立了直接种间电子转移(DIET)以提高性能。Fe 2 O 3增加了细胞外聚合物的电子穿梭组分的分泌,从而增加了FC反应器生物质的电子交换能力,这进一步促进了DIET。
更新日期:2020-01-13
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