Microbial communities change in an anaerobic digestion after application of microbial electrolysis cells

Lee, Beom; Park, Jun-Gyu; Shin, Wonbeom; Tian, Dongjie

doi:10.1016/j.biortech.2017.02.022

Cited by 127 publications

(33 citation statements)

References 32 publications

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“…Among them, AD technology, as it enhances methane production increasing the overall efficiency of the process. Several works have reported an increase of the methane yield and/or a better decomposition of complex substrates when coupling BES to anaerobic digesters [31,32,72,80,109,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158]. However, de Vrieze et al attributed those improvements to an increase of biomass retention on the electrodes, rather than electrochemical interaction [159].…”

Section: Applications Of Electromethanogenesismentioning

confidence: 99%

On the Edge of Research and Technological Application: A Critical Review of Electromethanogenesis

Blasco-Gómez

Batlle-Vilanova

Villano

et al. 2017

IJMS

169

113

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The conversion of electrical current into methane (electromethanogenesis) by microbes represents one of the most promising applications of bioelectrochemical systems (BES). Electromethanogenesis provides a novel approach to waste treatment, carbon dioxide fixation and renewable energy storage into a chemically stable compound, such as methane. This has become an important area of research since it was first described, attracting different research groups worldwide. Basics of the process such as microorganisms involved and main reactions are now much better understood, and recent advances in BES configuration and electrode materials in lab-scale enhance the interest in this technology. However, there are still some gaps that need to be filled to move towards its application. Side reactions or scaling-up issues are clearly among the main challenges that need to be overcome to its further development. This review summarizes the recent advances made in the field of electromethanogenesis to address the main future challenges and opportunities of this novel process. In addition, the present fundamental knowledge is critically reviewed and some insights are provided to identify potential niche applications and help researchers to overcome current technological boundaries.

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Section: Applications Of Electromethanogenesismentioning

confidence: 99%

On the Edge of Research and Technological Application: A Critical Review of Electromethanogenesis

Blasco-Gómez

Batlle-Vilanova

Villano

et al. 2017

IJMS

169

113

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“…Organic loading, long reaction time, ammonia levels and higher substrate concentrations are the key to enhanced methane production. Up to 40% enrichment of acetoclastic methanogen population was observed during an anaerobic digestion-MEC, which was proposed to efficiently degrade the organic material and convert VFA to CH 4 [85,94]. Methanobacterium palustre was among the first few organisms studied for the CH 4 generation with an abiotic anode and biocathode [47].…”

Section: Biogasmentioning

confidence: 99%

“…Progress is underway to exploit biowastes for CH 4 generation through the bioelectrochemical system. In this context, garbage slurry, food wastes, and wastewater have been explored as a substrate for biogas production [94,97,98]. MEC works well on low-strength wastewater and must be supported by anaerobic digesters when the feed has very high-strength wastewater or organic load.…”

Section: Biogasmentioning

confidence: 99%

Electro-Fermentation in Aid of Bioenergy and Biopolymers

et al. 2018

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Abstract:The soaring levels of industrialization and rapid progress towards urbanization across the world have elevated the demand for energy besides generating a massive amount of waste. The latter is responsible for poisoning the ecosystem in an exponential manner, owing to the hazardous and toxic chemicals released by them. In the past few decades, there has been a paradigm shift from "waste to wealth", keeping the value of high organic content available in the wastes of biological origin. The most practiced processes are that of anaerobic digestion, leading to the production of methane. However; such bioconversion has limited net energy yields. Industrial fermentation targeting value-added bioproducts such as-H 2 , butanediols; polyhydroxyalkanoates, citric acid, vitamins, enzymes, etc. from biowastes/lignocellulosic substrates have been planned to flourish in a multi-step process or as a "Biorefinery". Electro-fermentation (EF) is one such technology that has attracted much interest due to its ability to boost the microbial metabolism through extracellular electron transfer during fermentation. It has been studied on various acetogens and methanogens, where the enhancement in the biogas yield reached up to 2-fold. EF holds the potential to be used with complex organic materials, leading to the biosynthesis of value-added products at an industrial scale.

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“…So, herein, the variations of 0.5 V and 0.7 V were chosen to investigate the impact of the applied voltage. Magnetic stirring was continuously used to mix the medium in the chamber [14]. The MECs worked at batch mode.…”

Section: Mec Operationmentioning

confidence: 99%

Combined freezing-thawing pretreatment and microbial electrolysis cell for enhancement of highly concentrated organics degradation from dewatered sludge

Jia

Cheng

et al. 2020

Bioengineered

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2020) Combined freezing-thawing pretreatment and microbial electrolysis cell for enhancement of highly concentrated organics degradation from dewatered sludge, Bioengineered, 11:1, 301-310, ABSTRACTThe influence of freezing-thawing (F/T) pretreatment on the degradation of highly concentrated organic matters from dewatered sludge (DS) in microbial electrolysis cell (MEC) was investigated in this study. Extended freezing disintegrated the DS matrix and resulted in accelerated hydrolysis rate. The biogas production and stabilization were increased due to the pretreatment by 25-70% of H 2 production rate and 17.8-33.8% of COD reduction rate, respectively. Fourier transform infrared spectroscopy analysis indicated that the pretreatment was unable to alter the bioelectrochemical reactions except for accelerating degradation rate. Excitation and emission matrix (EEM) spectra showed that aromatic protein and soluble microbial products (SMPs)like materials in DS were increasingly solubilized by the pretreatment and significantly removed during electrogenesis. The F/T-pretreated DS favored the enrichment of exoelectrogens in MEC. ARTICLE HISTORY

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Microbial communities change in an anaerobic digestion after application of microbial electrolysis cells

Cited by 127 publications

References 32 publications

On the Edge of Research and Technological Application: A Critical Review of Electromethanogenesis

On the Edge of Research and Technological Application: A Critical Review of Electromethanogenesis

Electro-Fermentation in Aid of Bioenergy and Biopolymers

Combined freezing-thawing pretreatment and microbial electrolysis cell for enhancement of highly concentrated organics degradation from dewatered sludge

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