Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration

Yan, Wangwang; Sun, Fenglian; Li, Jianbo; Zhou, Yan

doi:10.1016/j.cej.2018.06.187

Cited by 134 publications

(40 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This MHC mediates in vitro reduction of soluble Fe 3+ by the Rnf complex in Ms . acetivorans (Yan et al, , b), and is believed to enable Ms . acetivorans performing the methanogenesis‐dependent respiration on ferrihydrite through extracellular electron transfer (Prakash et al ., ).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Redox cycling of Fe(II) and Fe(III) in magnetite accelerates aceticlastic methanogenesis by Methanosarcina mazei

Wang

Byrne

Liu

et al. 2020

Environ Microbiol Rep

View full text Add to dashboard Cite

It has been recently shown that magnetite nanoparticles (nanoFe 3 O 4 ) can facilitate methanogenic syntrophy but the effect of magnetite on methanogenesis alone remains elusive. Here we show that aceticlastic methanogenesis by Methanosarcina mazei is accelerated by magnetite and is correlated with the redox cycling of structural Fe(II) and Fe(III) in the mineral. An enrichment and its closest pure culture relative, Ms. mazei zm-15, both obtained from a natural wetland of the Tibetan plateau were tested in this experiment. The Fe(II) to Fe(III) ratios in magnetite, as measured by multiple approaches, show an initial increase in both the methanogenic cultures and the blank preparations containing no microbes. The Fe(II)/Fe(III) ratio then displays a distinct decline followed by an increase towards the end of incubation only in the enrichment and pure culture cultivations. This redox cycling of magnetite is in accordance with the stimulation of aceticlastic methanogenesis. Microscopic observation reveals the precipitation of nanoFe 3 O 4 on methanogen cell surface. The genomic analysis predicts that in addition to electron transfer components essential for aceticlastic methanogenesis, Ms. mazei zm-15 contains an outer-surface multiheme c-type cytochrome (MHC) and a few function-unknown surface proteins that harbour monoheme motif. We hypothesize that the redox cycling of nanoFe 3 O 4 delivers a positive influence via the MHC to the membrane electron transfer chain and hence promote the aceticlastic methanogenesis.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The Rhodobacter nitrogen fixation (Rnf) complex in Methanosarcina acetivorans is such a membrane‐associated oxidoreductase, which has been shown to catabolize in vitro reduction of soluble Fe 3+ and furthermore enable Ms . acetivorans performing respiratory growth on ferrihydrite (Yan et al, , b; Prakash et al ., ). The Ms .…”

Section: Introductionmentioning

confidence: 99%

Redox cycling of Fe(II) and Fe(III) in magnetite accelerates aceticlastic methanogenesis by Methanosarcina mazei

Wang

Byrne

Liu

et al. 2020

Environ Microbiol Rep

View full text Add to dashboard Cite

show abstract

“…This indicates the enrichment of protein-like substances, in the presence of CNT [37,60]. Such HS and protein-like substances can work as shuttles for electrons, which could enhance the DIET pathway [53,61,62]. Previously, it was concluded that different CMs can enrich certain constituents of SMP [61].…”

Section: Conductive Material-based Broth Changementioning

confidence: 86%

“…Although, the CNT-supplemented batches contained only 0.2 g of CNT, they could cause higher sludge conductivity that that achieved by 1.1 g nFe 3 O 4 found in nFe 3 O 4 -supplemented batches. CNT is, indeed, more effective than all other CBCMs, in regards to DIET stimulation [1,53]. On the other hand, CNT had almost similar electric conductivity as nFe 3 O 4 (>10,000 S/m) [46,54], therefore the higher sludge conductivity after CNT supplementation, compared to nFe 3 O 4 , might be because of the difference in specific surface area that reached 948 and 101 m 2 /g in CNT [55] and nFe 3 O 4 [56], respectively.…”

Section: Conductive Material-based Broth Changementioning

confidence: 95%

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

Mostafa

Song

et al. 2020

Microorganisms

View full text Add to dashboard Cite

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%.

show abstract

“…尽管没有明确证据表明苯甲酸可作为DIET产甲烷途径的底物, 但导电磁铁可明显促进矿稻田土壤中互养代谢苯甲酸为甲烷 [29] , 暗示难降解有机物(如芳香族化合物等)代谢可通过DIET产甲烷途径. Yan等人 [34] 报道导电磁铁矿或碳纳米管可明显强化厌氧污泥中苯酚代谢并提高产甲烷速率. 在该报道中发现, 投加导电磁铁矿或碳纳米管可促使微生物释放更多的胞外聚合物(EPS), 而EPS可作为电子穿梭体, 促进种间电子传递 [34] .…”

Section: 复杂有机物unclassified

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

Zhao¹,

Li²,

Zhang³

2020

Chin. Sci. Bull.

View full text Add to dashboard Cite

Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration

Cited by 134 publications

References 48 publications

Redox cycling of Fe(II) and Fe(III) in magnetite accelerates aceticlastic methanogenesis by Methanosarcina mazei

Redox cycling of Fe(II) and Fe(III) in magnetite accelerates aceticlastic methanogenesis by Methanosarcina mazei

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

Contact Info

Product

Resources

About