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

Hua, Tao; Li, Shengnan; Li, Fengxiang; Zhou, Qixing; Ondon, Brim Stevy

doi:10.1002/jctb.5898

Cited by 90 publications

(38 citation statements)

References 174 publications

(286 reference statements)

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“…Moreover, when a complex biorefinery (pyrolysis) stream or de-oiled wastewaters were used as the substrates of MECs, the COD removal rate could reach up to 79% (Ren et al, 2013;Lewis and Borole, 2016). More detailed advancements on the breakdown of complex organic pollutants via MECs can be found in recent reviews Hua et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Efficient Treatment of Wood Vinegar via Microbial Electrolysis Cell With the Anode of Different Pyrolysis Biochars

et al. 2020

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Microbial electrolysis cell (MEC) has emerged as the promising technology for COD removal as well as bioenergy recovery during the treatment of bio-refractory wastewaters. This study mainly focused on wood vinegar (the by-product from biomass pyrolysis) treatment via MEC technology with two typical biochars (coconut shell biochar and shrub biochar) as the carriers of microorganisms in anode chamber. Results indicated that MECs with coconut shell biochar had an obvious beneficial effect for treating wood vinegar, with COD removal reached up to 71.4%. GC-MS analysis showed that furfurals present in the wood vinegar were thoroughly degraded after MEC treatment. One interesting finding is that hydrocarbons accounted for a large portion of the compounds in the effluent, which may be the comprehensive result of complex organic reactions, including decarboxylation reactions, dehydration reaction, etc. The dominant microbial populations in MEC with biochar anode mainly included Geobacter, Macellibacteroides, Oscillibacter, Sedimentibacter, Comamonas, and Lachnoclostridium. This study demonstrated that pyrolysis biochar could be incorporated as a high-efficiency MEC anode material, and MECs with the inclusion of biochar could provide a feasible way for the treatment of recalcitrant wood vinegar.

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Section: Introductionmentioning

confidence: 99%

Efficient Treatment of Wood Vinegar via Microbial Electrolysis Cell With the Anode of Different Pyrolysis Biochars

et al. 2020

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“…Focusing on these features, microbial fuel cells (MFC) and microbial electrolysis cells (MEC), in which microbes are considered as "bio-electrocatalysts," have been intensively studied as summarized in recent Reviews. [7][8][9][10][11][12][13] For MFC, the respiratory electrons from microbes are transferred to the anode. By combining them with an appropriate cathodic reaction, such as an oxygen reduction reaction, a battery circuit is constructed.…”

Section: Introductionmentioning

confidence: 99%

Redox‐Active Polymers Connecting Living Microbial Cells to an Extracellular Electrical Circuit

Kaneko

Ishihara

Nakanishi

2020

Small

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Microbial electrochemical systems in which metabolic electrons in living microbes have been extracted to or injected from an extracellular electrical circuit have attracted considerable attention as environmentally‐friendly energy conversion systems. Since general microbes cannot exchange electrons with extracellular solids, electron mediators are needed to connect living cells to an extracellular electrode. Although hydrophobic small molecules that can penetrate cell membranes are commonly used as electron mediators, they cannot be dissolved at high concentrations in aqueous media. The use of hydrophobic mediators in combination with small hydrophilic redox molecules can substantially increase the efficiency of the extracellular electron transfer process, but this method has side effects, in some cases, such as cytotoxicity and environmental pollution. In this Review, recently‐developed redox‐active polymers are highlighted as a new type of electron mediator that has less cytotoxicity than many conventional electron mediators. Owing to the design flexibility of polymer structures, important parameters that affect electron transport properties, such as redox potential, the balance of hydrophobicity and hydrophilicity, and electron conductivity, can be systematically regulated.

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“…Practically power potential is less due to various loss. At ambient temperatures, MFCs may produce upto1.8kWh/ m 3 from a treated effluent (Hua et al, 2019), (Ge et al, 2013).It is estimated that in USA around 1960 MW of electricity can be produced from the dairy industrial wastewater (Borole and Hamilton, 2010). Electricity production from both municipal and various type of industrial wastewater are shown at table 4.…”

Section: Biogas Production From Wastewatermentioning

confidence: 99%

An Assessment of Wastewater Inventory and its Energy Potential: Bangladesh Perspective

Islam¹

2020

Preprint

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Background: Everyday considerable amount of wastewater is produced by each one of us. Developed country produce more wastewater than developing country. But disposing this wastewater into the environment is an expensive task and need heavy initial investment for that reason developing country only focus on water supply not on wastewater treatment considering it’s a burden and threatening the human health environment and climate change. Research shows that wastewater contain considerable amount kinetic and biochemical energy. But tapping energy from wastewater, proper inventory of national wastewater including type and characteristics of both industrial and municipal wastewater is essential which is presently absent in Bangladesh. In this paper, efforts have been taken firstly to estimate yearly total domestic as well as industrial wastewater production in Bangladesh based on reliable secondary data and monthly per capita income. Secondly, common, and emerging energy recovery technologies ideal for tapping energy from wastewater have been reviewed systematically and identified which are anaerobic digestion (AD) micro hydro powerplant (MHP), microbial electrolysis cell (MEC) and microbial fuel cell (MFC). Finally, energy potential has been estimated basing on previous research outputs and with empirical formula. At the end barrier and overcoming strategy with important recommendation has been proposed for researchers and decision makers.Results: Estimated yearly domestic and industrial wastewater is 4.874 billion and 0.452 billion tons respectively. For energy estimation,10%-50% total wastewater has been considered. Calculation shows that, 10% wastewater can produce 2.41, 1829.09 and 1.97 GW energy yearly through AD, MHP, MEC and MFC technologies, respectively whereas 50% total wastewater can generate 9145.94 GW energy yearly by MHP only.Conclusion: Estimated quantity of produced wastewater and energy potentials from wastewater is based on secondary data. For more reliable estimation feasibility study may be conducted by the researchers supported by stakeholders. Both wastewater producers and treatment plant owners should have noble desire backed by governmental organizations will facilitate the process. Outcomes are very significant and optimistic and it is expected that this findings not only inspired researcher, wastewater operators and policy makers of Bangladesh but also other developing countries around the globe.

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

Cited by 90 publications

References 174 publications

Efficient Treatment of Wood Vinegar via Microbial Electrolysis Cell With the Anode of Different Pyrolysis Biochars

Efficient Treatment of Wood Vinegar via Microbial Electrolysis Cell With the Anode of Different Pyrolysis Biochars

Redox‐Active Polymers Connecting Living Microbial Cells to an Extracellular Electrical Circuit

An Assessment of Wastewater Inventory and its Energy Potential: Bangladesh Perspective

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