Mechanisms of metabolic performance enhancement during electrically assisted anaerobic treatment of chloramphenicol wastewater

Guo, Na; Ma, Xiaofang; Ren, Shaojie; Wang, Shuguang; Wang, Yunkun

doi:10.1016/j.watres.2019.03.032

Cited by 71 publications

(18 citation statements)

References 44 publications

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“…Romboutsia is reported as a hydrogen‐producing bacteria and may transfer electrons to contaminant through hydrogen for improving contaminant degradation efficiency. Macellibacteroides is a fermentative‐related bacteria . Its abundance in BES‐IP is higher than that in BES‐P, probably because it might further decompose the intermediate metabolites from p‐CNB degradation.…”

Section: Resultsmentioning

confidence: 99%

Bioaugmentation of p‐chloronitrobenzene in bioelectrochemical systems with Pseudomonas fluorescens

Song

Zhou

Wang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: p-Chloronitrobenzene (p-CNB) is easily accumulated in the environment and subsequently is a threat to humans and the ecosystem. The anaerobic process as an important pathway for p-CNB degradation has a relatively low degradation rate. This study illustrated that the strain Pseudomonas fluorescens was evaluated as the biocatalyst for bioaugmentation to enhance the p-CNB removal in bioelectrochemical system (BES). RESULTS:When the initial p-CNB concentration was 100 mg L −1 , the p-CNB removal efficiency reached 100% at 12 h in BES with P. fluorescens. All the p-CNB removal efficiencies in BES were higher than that in anaerobic degradation and electrocatalysis. Meantime, the highest total organic carbon (TOC) removal efficiency was obtained at 89.8% after augmentation with P. fluorescens. During the bioaugmentation, microbial community analysis showed that the main abundance changes were in Pseudomonas, Romboutsia and Macellibacteroides. The cyclic voltammetry (CV) showed BES with bioaugmentation had the highest activity in reducing p-CNB and hydrogen evolution. Combined with intermediates analysis, bioaugmentation possibly stimulated nitro reduction and hydrodechlorination rate in p-CNB reduction.CONCLUSION: These results demonstrate that BES with P. fluorescens bioaugmentation could serve as a potential treatment process for p-CNB removal. Microbial communitySamples were collected from biofilm on the cathode in BES-I, BES-IP and AEC-I at the end of the experiment using bacterial 16S rDNA sequence analysis on an Illumina platform. The PowerSoil ® J Chem Technol Biotechnol 2020; 95: 274-280

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Section: Resultsmentioning

confidence: 99%

Bioaugmentation of p‐chloronitrobenzene in bioelectrochemical systems with Pseudomonas fluorescens

Song

Zhou

Wang

et al. 2019

J of Chemical Tech & Biotech

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“…Indeed, although exoelectrogenic bacteria have been shown to favor DIET-mediated methane production [7,8,10], only Geobacter bacterial species have been found so far to participate in DIET with methanogens [19]. Shewanella species and methanogens have been previously detected simultaneously in the same niche [26,27], but no evidence was given for increasing methane production by exoelectrogenic activity. Second, the high increase of methane production by addition of conductive materials is explained by easier electron transfer between the electron donor S. oneidensis MR-1 and methanogens, thus suggesting an electric syntrophy.…”

Section: Increase Of Methane Production Performance With S Oneidensimentioning

confidence: 99%

“…Therefore, there may be a potential syntrophy between Shewanella and methanogens by acetoclastic methanogenesis. However, strong experimental evidence is actually missing, despite observations of the co-occurrence of both Shewanella and methanogens in some environments [26,27].…”

Section: Introductionmentioning

confidence: 99%

Methane production by acetate dismutation stimulated by Shewanella oneidensis and carbon materials: An alternative to classical CO2 reduction

Xiao

Liu

Lichtfouse

et al. 2020

Chemical Engineering Journal

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“…Methane (CH 4 ) is the principal component of biogas produced by anaerobic digestion and can be used as clean, renewable bioenergy that can substitute fossil fuels ( Holm-Nielsen et al, 2009 ; Haberl et al, 2012 ; Awe et al, 2017 ; Li et al, 2019 ). Additionally, many kinds of organic hazards, such as polycyclic aromatic hydrocarbons (PAHs), BTEX, chloramphenicol, polyacrylamide, and antibiotics, can be effectively removed from the initial substrates and converted into CH 4 via anaerobic digestion ( Kunapuli et al, 2007 ; Agarry and Owabor, 2011 ; Hu et al, 2018 ; Guo et al, 2019 ; Bianco et al, 2020 ). Therefore, how to efficiently harness the anaerobic digestion process for the improvement of CH 4 production and removal the rate of organic pollutants has long been a global challenge.…”

Section: Introductionmentioning

confidence: 99%

Co-metabolic Effect of Glucose on Methane Production and Phenanthrene Removal in an Enriched Phenanthrene-Degrading Consortium Under Methanogenesis

Zhou

Wang

et al. 2021

Front. Microbiol.

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Anaerobic digestion is used to treat diverse waste classes, and polycyclic aromatic hydrocarbons (PAHs) are a class of refractory compounds that common in wastes treated using anaerobic digestion. In this study, a microbial consortium with the ability to degrade phenanthrene under methanogenesis was enriched from paddy soil to investigate the cometabolic effect of glucose on methane (CH4) production and phenanthrene (a representative PAH) degradation under methanogenic conditions. The addition of glucose enhanced the CH4 production rate (from 0.37 to 2.25mg⋅L−1⋅d−1) but had no influence on the degradation rate of phenanthrene. Moreover, glucose addition significantly decreased the microbial α-diversity (from 2.59 to 1.30) of the enriched consortium but showed no significant effect on the microbial community (R2=0.39, p=0.10), archaeal community (R2=0.48, p=0.10), or functional profile (R2=0.48, p=0.10). The relative abundance of genes involved in the degradation of aromatic compounds showed a decreasing tendency with the addition of glucose, whereas that of genes related to CH4 synthesis was not affected. Additionally, the abundance of genes related to the acetate pathway was the highest among the four types of CH4 synthesis pathways detected in the enriched consortium, which averagely accounted for 48.24% of the total CH4 synthesis pathway, indicating that the acetate pathway is dominant in this phenanthrene-degrading system during methanogenesis. Our results reveal that achieving an ideal effect is diffcult via co-metabolism in a single-stage digestion system of PAH under methanogenesis; thus, other anaerobic systems with higher PAH removal efficiency should be combined with methanogenic digestion, assembling a multistage pattern to enhance the PAH removal rate and CH4 production in anaerobic digestion.

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Mechanisms of metabolic performance enhancement during electrically assisted anaerobic treatment of chloramphenicol wastewater

Cited by 71 publications

References 44 publications

Bioaugmentation of p‐chloronitrobenzene in bioelectrochemical systems with Pseudomonas fluorescens

Bioaugmentation of p‐chloronitrobenzene in bioelectrochemical systems with Pseudomonas fluorescens

Methane production by acetate dismutation stimulated by Shewanella oneidensis and carbon materials: An alternative to classical CO2 reduction

Co-metabolic Effect of Glucose on Methane Production and Phenanthrene Removal in an Enriched Phenanthrene-Degrading Consortium Under Methanogenesis

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