Roles of magnetite and granular activated carbon in improvement of anaerobic sludge digestion

Peng, Hong; Zhang, Yaobin; Tan, Dongmei; Zhao, Zhiqiang; Zhao, Huimin; Quan, Xie

doi:10.1016/j.biortech.2017.10.047

Cited by 168 publications

(36 citation statements)

References 37 publications

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“…However, increase in genus Methanosaeta was observed in M1 (+ 34.17%), M10 (+ 22.03%) and T10 (+ 34.27%). This result was consistent with data from Peng et al [41] and Wang et al [21] who reported the enrichment of genus Methanosaeta with adding magnetite and granular AC and sawdust BC under mesophilic conditions, respectively. However, Lin et al [16] reported a decrease in this genus when adding graphene under mesophilic conditions.…”

Section: Relative Abundance Of Bacterial and Archaeal Generasupporting

confidence: 93%

Succession of microbial community in anaerobic digestion of dairy manure induced by manure-derived biochar

Jang

Brady

Kan

2020

Environmental Engineering Research

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The present study investigates possible roles of manure-derived biochar (MBC) in anaerobic digestion (AD) of dairy manure. Addition of MBC led to an increase in cumulative methane yield and a decrease in lag phase under all tested conditions (concentration of MBC: 1 and 10 g/L, temperature: 20, 35 and 55°C). For example, the cumulative methane yield in the mesophilic AD with 10 g/L MBC were 24.51% higher than that of the AD without MBC. Additionally, lag phage of mesophilic AD with 10 g/L MBC decreased from 2.08 d to 1.52 d. Microbial community analysis indicated that the addition of MBC to mesophilic and thermophilic AD of dairy manure increased the relative abundance of Ruminofilibacter which related to the hydrolysis. In addition, the addition of MBC to AD potentially stimulated the growth of syntrophic bacteria (e.g., genera Clostridium, Syntrophomonas and Syntrophus) and hydrogenotrophic methanogens (e.g., genera Methanobacterium, Methanolinea and Methanomassiliicoccus). Furthermore, microbial community analysis also suggested that mediate interspecies electron transfer and direct interspecies electron transfer would be accelerated by addition of MBC which showed high electrical conductivity (3230 μS/cm).

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Section: Relative Abundance Of Bacterial and Archaeal Generasupporting

confidence: 93%

Succession of microbial community in anaerobic digestion of dairy manure induced by manure-derived biochar

Jang

Brady

Kan

2020

Environmental Engineering Research

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“…Previously, it was stated that the supplementation of conductive materials (CMs) in AD systems can play a vital role in stimulating DIET [21,22]. The utilized CM can be classified into carbon-based CM (CBCM) and iron-based CM (IBCM).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Anaerobic Digestion of Long Chain Fatty Acid by Adding Magnetite and Carbon Nanotubes

Mostafa

Song

et al. 2020

Microorganisms

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This study investigated the impact of stimulating direct interspecies electron transfer (DIET), by supplementing nano-sized magnetite (nFe3O4, 0.5 g Fe/g VSS) and carbon nanotubes (CNT, 1 g/L), in anaerobic digestion of oleic acid (OA) at various concentrations (0.10–4.00 g chemical oxygen demand(COD)/L). Both supplementations could enhance CH4 production, and its beneficial impact increased with increased OA concentration. The biggest improvements of 114% and 165% compared to the control were achieved by nFe3O4 and CNT, respectively, at OA of 4 g COD/L. The enhancement can be attributed to the increased sludge conductivity: 7.1 ± 0.5 (control), 12.5 ± 0.8 (nFe3O4-added), and 15.7 ± 1.1 µS/cm (CNT-supplemented). Dissolved iron concentration, released from nFe3O4, seemed to have a negligible role in improving CH4 production. The excretion of electron shuttles, i.e., humic-like substances and protein-like substances, were found to be stimulated by supplementing nFe3O4 and CNT. Microbial diversity was found to be simplified under DIET-stimulating conditions, whereby five genera accounted for 88% of the total sequences in the control, while more than 82% were represented by only two genera (Methanotrix concilli and Methanosarcina flavescens) by supplementing nFe3O4 and CNT. In addition, the abudance of electro-active bacteria such as Syntrophomonas zehnderi was significantly increased from 17% to around 45%.

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“…但在常规厌氧消化系统中, DIET互养菌的丰度不高, 导致DIET产甲烷不明显. 一些研究尝试利用导电材料在常规厌氧消化系统中构建 DIET产甲烷途径, 但提高的效果甚微 [77,78] . 但当Fe(III) 氧化物存在时, DIET产甲烷立即明显.…”

Section: 刺激Diet互养菌unclassified

“…但当Fe(III) 氧化物存在时, DIET产甲烷立即明显. 例如, Peng等人 [78] 在处理剩余污泥的厌氧消化器中发现, 投加颗粒 , 易发生异化铁还原过程, 与产甲烷菌竞争电子供体, 导致产甲烷代谢抑制. 此外, 一些Fe(III)还原菌 (如Geobacter等)更喜欢生长在还原电势较低的固体Fe (III)氧化物或电极表面 [82,83] , 具备更高的Fe(III)/Fe(II)还原电势Fe(III)氧化物不利于Fe(III)还原菌的生长和代谢.…”

Section: 刺激Diet互养菌unclassified

Direct interspecies electron transfer in anaerobic digestion: Research and technological application

Zhao¹,

Li²,

Zhang³

2020

Chin. Sci. Bull.

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Roles of magnetite and granular activated carbon in improvement of anaerobic sludge digestion

Cited by 168 publications

References 37 publications

Succession of microbial community in anaerobic digestion of dairy manure induced by manure-derived biochar

Succession of microbial community in anaerobic digestion of dairy manure induced by manure-derived biochar

Enhanced Anaerobic Digestion of Long Chain Fatty Acid by Adding Magnetite and Carbon Nanotubes

Direct interspecies electron transfer in anaerobic digestion: Research and technological application

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