A short-term stimulation of ethanol enhances the effect of magnetite on anaerobic digestion
A short-term stimulation of ethanol enhances the effect of magnetite on anaerobic digestion
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乙醇的短期刺激增强了磁铁矿对厌氧消化的影响
DOI：
10.1007/s00253-018-9531-2
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发表时间：
2018-12
影响因子：
5
通讯作者：
Zhu Liang
中科院分区：
文献类型：
--
作者：
Wang Caiqin;Qiao Weilong;Chen Hui;Xu Xiangyang;Zhu Liang
近年来，导电氧化铁(CIO)在间歇实验中被证明可以促进厌氧微生物的合成，其基础是物种间直接电子转移(DICE)。然而，在厌氧消化(AD)反应器中，CIO的影响一直不显著，特别是在缺乏以饲料为基础的合养伙伴的情况下。在本研究中，考察了磁铁矿对以蔗糖为唯一碳源的AD系统性能的影响，但在最初36天的运行中取得了有限的增强作用。在磁铁矿改性的AD反应器中进一步研究了乙醇投加的短期效果，结果表明，添加10gFe/L微米磁铁矿(R3)的AD反应器与其他反应器(不加磁铁矿的R1；投加2gFe/L微米磁铁矿的R2；投加2gFe/L纳米磁铁矿的R4)相比，具有更高的COD去除性能和甲烷比例。同时，R3厌氧污泥胞外聚合物(EPS)中的吡哆醇含量和电导率显著高于其他菌株。高通量测序分析表明，R3污泥中古生菌的丰度增加，以摄食甲基肉桂酸为主(63.64%)。此外，潜在电活性细菌氯柔菌素R3的丰度分别是R1、R2和R4的7.57倍、3.61倍和7.37倍。这些结果表明，磁铁矿投加和乙醇短期刺激的协同作用可以有效地富集厌氧污泥中的电活性微生物和产甲烷菌。
Conductive iron oxides (CIO) have been proved recently to facilitate the anaerobic microbial syntrophy based on the direct interspecies electron transfer (DIET) in batch experiments. However, the effect of CIO was always insignificant in anaerobic digestion (AD) reactor especially when the DIET-based syntrophic partners were absent. In this study, the effect of magnetite on performance of AD system with sucrose as a sole carbon source was investigated, but limited enhancement was achieved during the first 36-day operation. The short-term effect of ethanol addition was further studied in the magnetite-amended AD reactor, and results showed that the AD reactor with 10gFe/L micro-sized magnetite (R3) achieved higher performance of COD removal and methane proportion compared with the other reactors (R1 without magnetite; R2 with 2gFe/L micro-sized magnetite; R4 with 2gFe/L nano-sized magnetite). Meanwhile, the pyridoxine in extracellular polymeric substances (EPS) and conductivity of anaerobic sludge from R3 increased more significantly than those of the others. Analysis of high-throughput sequencing indicated that the abundance of archaea increased in sludge from R3 andMethanosarcinaresponsible for DIET was dominant (63.64%). Additionally, the abundance of potential electroactive bacteriaChloroflexiin R3 was 7.57-fold, 3.61-fold and 7.37-fold as that of R1, R2 and R4, respectively. These results demonstrated that the electroactive microbes and methanogens could be enriched efficiently in anaerobic sludge via synergetic effect of magnetite addition and ethanol short-term stimulation.
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影响因子：
7.7
作者：
McInerney, Michael J.;Sieber, Jessica R.;Gunsalus, Robert P.
通讯作者：
Gunsalus, Robert P.
DOI：
10.1021/jp065115p
发表时间：
2006-11
期刊：
The journal of physical chemistry. A
影响因子：
--
作者：
J. M. Matxain;Mikael Ristilä;Å. Strid;L. Eriksson
通讯作者：
J. M. Matxain;Mikael Ristilä;Å. Strid;L. Eriksson
影响因子：
6
作者：
Lei Wang;Qi Zhou;Fengting Li
通讯作者：
Lei Wang;Qi Zhou;Fengting Li
影响因子：
11.4
作者：
E. Blanchet;Sophie Pécastaings;B. Erable;C. Roques;A. Bergel
通讯作者：
E. Blanchet;Sophie Pécastaings;B. Erable;C. Roques;A. Bergel
生态相容性生物炭在厌氧消化中的应用缓解酸胁迫并促进功能微生物的选择性定殖
影响因子：
12.8
作者：
Luo, Chenghao;Lu, Fan;He, Pinjing
通讯作者：
He, Pinjing