Characterization and optimization of cathodic conditions for H 2 O 2 synthesis in microbial electrochemical cells

Sim, Junyoung; An, Junyeong; Elbeshbishy, Elsayed; Ryu, Hodon; Lee, Hyung-Sool

doi:10.1016/j.biortech.2015.06.076

Cited by 56 publications

(50 citation statements)

References 20 publications

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“…Most MPPC research focused more on optimization of one or two variables rather than a systematic investigation of factors affecting H 2 O 2 production, net energy demand, and reactor design. Fu et al., Modin and Fukushi, Arends et al., and Sim et al . focused on maximizing H 2 O 2 production from different wastewater sources at different anode and cathode hydraulic retention times (HRTs).…”

Section: Introductionmentioning

confidence: 99%

Tailoring Microbial Electrochemical Cells for Production of Hydrogen Peroxide at High Concentrations and Efficiencies

et al. 2016

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A microbial peroxide producing cell (MPPC) for H O production at the cathode was systematically optimized with minimal energy input. First, the stability of H O was evaluated using different catholytes, membranes, and catalyst materials. On the basis of these results, a flat-plate MPPC fed continuously using 200 mm NaCl catholyte at a 4 h hydraulic retention time was designed and operated, producing H O for 18 days. H O concentration of 3.1 g L H O with 1.1 Wh g H O power input was achieved in the MPPC. The high H O concentration was a result of the optimum materials selected. The small energy input was largely the result of the 0.5 cm distance between the anode and cathode, which reduced ionic transport losses. However, >50 % of operational overpotentials were due to the 4.5-5 pH unit difference between the anode and cathode chambers. The results demonstrate that a MPPC can continuously produce H O at high concentration by selecting compatible materials and appropriate operating conditions.

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Section: Introductionmentioning

confidence: 99%

Tailoring Microbial Electrochemical Cells for Production of Hydrogen Peroxide at High Concentrations and Efficiencies

et al. 2016

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“…In contrast, voltage decrease from −1.0 to −1.2 V resulted in lower succinic acid concentrations, lower succinic acid yields, and unnecessary energy losses. The energy losses at lower potential were expressed as overpotential of the cathode compartment . A higher voltage could harm the bacteria, resulting in poor performance of succinic acid concentration and yield .…”

Section: Resultsmentioning

confidence: 99%

“…The energy losses at lower potential were expressed as overpotential of the cathode compartment. 38 A higher voltage could harm the bacteria, resulting in poor performance of succinic acid concentration and yield. 19 To summarize, a potential of −1.0 V in fed-batch fermentation could provide sufficient electrons in MECs and could adequately enhance the intracellular NADH level to increase the concentration of succinic acid.…”

Section: Effects Of Potential Optimization On Succinic Acid Productiomentioning

confidence: 99%

Enhanced succinic acid production from polyacrylamide‐pretreated cane molasses in microbial electrolysis cells

Wang

Jiao

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Microbial electrolysis cells (MECs) are bioelectrochemical reactors in which chemical energy stored in organic compounds is converted to hydrogen through biocatalytic oxidation by microorganisms. This study is the first to report on the practical application of an electric MEC bioreactor to succinic acid anaerobic fed‐batch fermentation from polyacrylamide‐pretreated cane molasses by Actinobacillus succinogenes (130Z). RESULTS When molasses was used as the carbon source with an initial sugar concentration of 15 g L‐1, the succinic acid concentration was 22.4% higher in electric MECs than in non‐electric MECs. However, the high molasses concentration inhibited the function of MECs. Nevertheless, anionic polyacrylamide (APAM) pretreatment of molasses was noted to be effective for succinic acid production in MECs even at an initial sugar concentration of 75 g L‐1. Therefore, fed‐batch fermentation of APAM‐pretreated cane molasses with electric MECs at −1.0 V was performed, and a succinic acid concentration of 83.67 g L‐1 and productivity of 1.743 g L‐1 h‐1 were obtained, which were 20.7% and 505% higher than those achieved in non‐electric MECs and without pretreated molasses in MECs, respectively. CONCLUSION The succinic acid concentration is significantly increased in electric MECs. Polyacrylamide treatment strategy can resolve the inhibition of high molasses concentration to succinic acid production in MECs and might be an effective method for improvement of chemical production from high hydrolysate content using MECs. Fed‐batch fermentation with polyacrylamide‐pretreated cane molasses in electric MECs is noted to be ideal to achieve further increase in succinic acid concentration and yield. © 2017 Society of Chemical Industry

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“…(A)) . The cathode potential has been identified as a key parameter for H 2 O 2 production in the MEC . Li et al .…”

Section: Applications Of the Microbial Electrolysis Cellmentioning

confidence: 99%

“…87 The cathode potential has been identified as a key parameter for H 2 O 2 production in the MEC. 88 Li et al 89 were the first to develop an innovative method for cost-effective production of H 2 O 2 by using a microbial reverse-electrodialysis electrolysis cell. In this system, the electrical potential generated by the exoelectrogens and the salinity gradient between salt and fresh water were used to drive a high rate of H 2 O 2 production ( Fig.…”

Section: Production Of Hydrogen Peroxide (H 2 O 2 )mentioning

confidence: 99%

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

Hua

et al. 2019

J of Chemical Tech & Biotech

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Microbial electrolysis cells (MECs) have been studied in a wide range of potential applications such as recalcitrant pollutants removal, chemicals synthesis, resources recovery and biosensors. However, MEC technology is still in its infancy and poses serious challenges for practical large‐scale applications. To understand the diversified applications of MEC, this review aims to explore MEC applications in the following contexts: an overview of MEC for energy generation and recycling such as hydrogen, methane, formic acid and hydrogen peroxide; contaminant removal, specifically complex organic pollutants and inorganic pollutants; as a sensor; as well as resource recovery. New concepts of MEC technology; configuration optimization; electron transfer pathways in biocathodes, and coupling with other technologies for value‐added applications such as MEC‐anaerobic digestion, MEC‐MFC, MEC‐MDC and bio‐E‐Fenton system are discussed. Finally, challenges and outlooks are suggested. The review aims to assist researchers and engineers to understand the latest trends in MEC technologies and applications. © 2018 Society of Chemical Industry

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Characterization and optimization of cathodic conditions for H 2 O 2 synthesis in microbial electrochemical cells

Cited by 56 publications

References 20 publications

Tailoring Microbial Electrochemical Cells for Production of Hydrogen Peroxide at High Concentrations and Efficiencies

Tailoring Microbial Electrochemical Cells for Production of Hydrogen Peroxide at High Concentrations and Efficiencies

Enhanced succinic acid production from polyacrylamide‐pretreated cane molasses in microbial electrolysis cells

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

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