Analysis of electrode microbial communities in an up-flow bioelectrochemical system treating azo dye wastewater

Cui, Min-Hua; Cui, Dan; Gao, Lei; Cheng, Hao-Yi; Wang, Aijie

doi:10.1016/j.electacta.2016.10.121

Cited by 41 publications

(9 citation statements)

References 53 publications

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“…In these systems microorganisms perform the oxidation of compounds and the electrons generated in this process can be used in the production of energy and other compounds of interest [82]. BES have proven to be better compared to conventional anaerobic and electric or electrochemical processes by performing well in a shorter time, in a more cost-effective manner, and causing less negative environmental impact [83].…”

Section: Bioreactors and Their Potential In The Bioremediation Of Azo Dyes By Bacteriamentioning

confidence: 99%

Degradation of Azo Dyes: Bacterial Potential for Bioremediation

et al. 2022

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The use of dyes dates to ancient times and has increased due to population and industrial growth, leading to the rise of synthetic dyes. These pollutants are of great environmental impact and azo dyes deserve special attention due their widespread use and challenging degradation. Among the biological solutions developed to mitigate this issue, bacteria are highlighted for being versatile organisms, which can be applied as single organism cultures, microbial consortia, in bioreactors, acting in the detoxification of azo dyes breakage by-products and have the potential to combine biodegradation with the production of products of economic interest. These characteristics go hand in hand with the ability of various strains to act under various chemical and physical parameters, such as a wide range of pH, salinity, and temperature, with good performance under industry, and environmental, relevant conditions. This review encompasses studies with promising results related to the use of bacteria in the bioremediation of environments contaminated with azo dyes in the most diverse techniques and parameters, both in environmental and laboratory samples, also addressing their mechanisms and the legislation involving these dyes around the world, showcasing the importance of bacterial bioremediation, specialty in a scenario in an ever-increasing pursuit for sustainable production.

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Section: Bioreactors and Their Potential In The Bioremediation Of Azo Dyes By Bacteriamentioning

confidence: 99%

Degradation of Azo Dyes: Bacterial Potential for Bioremediation

et al. 2022

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“…At the end of each phase, anodic microbial biofilm was obtained as the method described by Cui et al (2016). In brief, the fibers covered with biofilm were cut randomly from at least three positions of anodic carbon brush and crushed using sterile scissors.…”

Section: Microbial Community Analysismentioning

confidence: 99%

Effect of Substrate Conversion on Performance of Microbial Fuel Cells and Anodic Microbial Communities

Zhao

Zhang

She

et al. 2017

Environmental Engineering Science

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Performance of microbial fuel cells (MFCs) was monitored during the influent nutrient change from lactate to glucose/acetate/propionate and then to lactate. Meanwhile, anodic microbial communities were characterized by culture-independent molecular biotechnologies. Results showed MFC performance recovered rapidly when the lactate was replaced by one of its metabolic intermediates acetate, while it needed a longer time to recover if lactate substrate was converted to glucose/propionate or acetate to lactate. Secondary lactate feed enhanced the enrichment of bacterial populations dominating in first lactate feed. Electricity-producing bacteria, spp., and beneficial helpers, spp. and spp., revived from a low abundance as lactate secondary supply, but microbial communities were hard to achieve former profiles in structure and composition. Hence, microbial community profiles tended to recover when outside environmental condition were restored. Different substrates selected unique functional microbial populations.

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“…The electroactive biofilm formation process on the anode-surface is critical for an efficient electricity producing MFC (Kumar et al, 2015; Li and Cheng, 2019), and changes in this biofilm consequently strongly affect its electrical output. Hence, the anodic biofilm microbial composition and function has been considered a vital component of the MFC performance, and the metabolic processes that characterize it have been intensively studied (Chae et al 2009; Beecroft et al 2012; Commault et al 2015; Lee et al 2015; Cui et al 2016; Hodgson et al 2016; Paitier et al 2016; Yanuka-Golub et al, 2016; Ishii et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Anode surface bioaugmentation enhances deterministic biofilm assembly in microbial fuel cells

Yanuka‐Golub

Dubinsky

Korenblum³

et al. 2020

Preprint

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Microbial fuel cells (MFCs) are devices that can generate energy while aiding biodegradation of waste through the activity of an electroactive mixed biofilm. Metabolic cooperation is considered essential for MFCs’ efficiency, especially during early-anode colonization. Yet, the specific ecological processes that drive the assembly of an optimized anode-attached community remain unknown. Here, we show, using 16S rRNA gene amplicon and shotgun metagenomic sequencing that bioaugmentation of the anode surface with an electroactive consortium originating from a well-established anodic biofilm, dominated by different Desulfuromonas strains, resulted in an extremely rapid voltage generation (reaching maximal voltage within several hours). This was in sharp contrast to the highly stochastic and slower biofilm assembly that occurred when the anode-surface was not augmented. By comparing two inoculation media, wastewater and filtered wastewater, we were able to illustrate two different "source-communities" for newly arriving species that with time colonized the anode surface in a different manner and resulted in dramatically different community assembly processes. Remarkably, an efficient anode colonization process was obtained only if unfiltered wastewater was added, leading to a near-complete replacement of the bioaugmented community by Geobacter lovleyi. We propose that anode bioaugmentation reduced stochasticity by creating available niches that were quickly occupied by specific newly-arriving species that positively supported the fast establishment of a highly-functional anode biofilm.

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Analysis of electrode microbial communities in an up-flow bioelectrochemical system treating azo dye wastewater

Cited by 41 publications

References 53 publications

Degradation of Azo Dyes: Bacterial Potential for Bioremediation

Degradation of Azo Dyes: Bacterial Potential for Bioremediation

Effect of Substrate Conversion on Performance of Microbial Fuel Cells and Anodic Microbial Communities

Anode surface bioaugmentation enhances deterministic biofilm assembly in microbial fuel cells

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