Performance and mechanism of conductive magnetite particle-enhanced excess sludge anaerobic digestion for biogas recovery.
Performance and mechanism of conductive magnetite particle-enhanced excess sludge anaerobic digestion for biogas recovery.
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导电磁铁矿颗粒强化剩余污泥厌氧消化沼气回收性能及机理
DOI：
10.1039/d1ra06236k
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发表时间：
2021-10-28
期刊：
影响因子：
3.9
通讯作者：
Liu, Yali
中科院分区：
文献类型：
--
作者：
Kang, Xiaorong;Liu, Yali
本研究的目的是评估磁铁矿颗粒对剩余污泥厌氧消化的影响。结果表明，在0-5 g L−1范围内，甲烷产量随着磁铁矿投加量的增加而增加，当磁铁矿投加量为5 g L−1时，反应器20 d后的累计甲烷产量比空白反应器提高了50.1%。同时，许多挥发性脂肪酸（VFA）在高磁铁矿剂量产生，提供所需的底物产甲烷。磁铁矿的添加浓度与甲烷产率呈正相关，说明磁铁矿的添加有利于促进VFAs向甲烷的转化。当磁铁矿投加量为5 g L−1时，蛋白质和碳水化合物的降解率分别达到64%和52.6%，相应的蛋白酶和辅酶F420的活性分别为9.03 IU L−1和1.652 μmol L−1。此外，Methanosaeta和Methanoregula属富集了磁铁矿，磁铁矿通常作为电子受体参与种间直接电子转移。将磁铁矿颗粒应用于剩余污泥厌氧消化。甲烷产生量和污泥减量与磁铁矿颗粒投加量有关，参与电子传递的甲烷菌和甲烷调节菌得到富集。
The aim of this study was to evaluate the effect of magnetite particles on the anaerobic digestion of excess sludge. The results showed that methane production increased with the increase in magnetite dosage in the range of 0–5 g L−1, and the cumulative methane production increased by 50.1% at a magnetite dosage of 5 g L−1 compared with the blank reactor after 20 days. Simultaneously, numerous volatile fatty acids (VFAs) were produced at high magnetite dosages, providing the required substrates for methanogenesis. The concentration of magnetite addition was positively correlated with methane production, which proved that magnetite was beneficial for the promotion of the conversion of VFAs to methane. Moreover, the degradation efficiencies of proteins and carbohydrates reached 64% and 52.6% at the magnetite dosage of 5 g L−1, respectively, and corresponding activities of protease and coenzyme F420 were 9.03 IU L−1 and 1.652 μmol L−1. In addition, the Methanosaeta and Methanoregula genus were enriched by magnetite, which often participate in direct interspecies electron transfer as electron acceptors. Magnetite particles were applied to excess sludge anaerobic digestion. The methane production and sludge reduction were related to magnetite particle dosage, and the Methanosaeta and Methanoregula involved in the electron transfer were enriched.
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影响因子：
11.4
作者：
Cai, Yafan;Zhao, Xiaoling;Wang, Xiaofen
通讯作者：
Wang, Xiaofen
DOI：
10.1099/ijs.0.035048-0
发表时间：
2012-06-01
影响因子：
2.8
作者：
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11.4
作者：
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Escudie, Renaud
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影响因子：
11.4
作者：
Jia, Bo;Yun, Sining;Xing, Tian
通讯作者：
Xing, Tian
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影响因子：
12.8
作者：
Jing, Yuhang;Wan, Jingjing;Luo, Gang
通讯作者：
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