Bioelectrochemical systems (BESs) hold great promise for sustainable production of energy and chemicals. This review addresses the factors that are essential. performance for practical applications. T.H.; Ter Heijne, A.; Buisman, C.J.; Hamelers, H.V. Bioelectrochemical systems: An outlook for. Examples of such ‘bioelectrochemical systems’ (BES) are microbial fuel cells examines the use of BES to treat wastewater and generate electricity . For practical reasons, the hydrogen gas has been captured in plastic tubes .. The outlook.
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D The BES is preceded by an acidification step two-stage process and followed by a polishing step. Microbial ecology meets electrochemistry: It has also been demonstrated that CO 2 practicql be reduced to methane in microbial biocathodes Cheng et al.
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Bioelectrochemical systems: an outlook for practical applications.
Methanogenic microorganisms present inside MEC reactors not only compete with electrogenic microorganism for substrate but also contaminate the cathodic hydrogen, requiring a gas-cleaning step depending on the final use praxtical the hydrogen. The use, distribution or reproduction in other forums is permitted, provided the original author s or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice.
Electrochemically assisted microbial production of hydrogen from acetate. Electric power generation from municipal, food, and animal wastewaters using microbial fuel cells. Rozendal in Bioelectrochemical Systems: Despite the loss of hydrogen systsms energy recovery was not enough to offset the energy inputthe overall energy usage to remove aapplications organic pollution was again below that of aerobic treatments.
Energy Recovery from Organic Matter Contaminated Streams A BES can be defined as an electrochemical system in which at least one of the anodic or cathodic reactions is microbially catalyzed Rabaey et al.
Bioelectrochemical systems: an outlook for practical applications.
Microbial electrolysis cells for high yield hydrogen gas production from organic matter. Anaerobic digestion of secondary residuals from an anaerobic bioreactor at a brewery to enhance bioenergy generation. Hydrogen Energy 39, — Moreover, these and many other studies Lee and Rittmann, ; Gil-Carrera et al.
Represents the amount of oxygen required to oxidize the biodegradable organic matter dissolved into the wastewater to CO 2 and H 2 O. Showing of 2 references. This review addresses the factors that are essential for practical application of BESs. Electrosynthesis has emerged as a new field of research in the last two years where electrical current is used for synthesis of fuels and chemicals.
In both cases, the energy required to remove the organic contamination was below the energy consumption threshold typically associated with an aerobic treatment 1.
Further energy savings can be obtained from the reduced sludge production in MEC reactors.
In addition, the removal of nitrogen an important contaminant in dWW in a MFC—MEC is usually low, and it is mostly attributable to nitrogen assimilation into bacterial biomass, which accounts for only a small percent of the total ;ractical usually needed Freguia et al.
Current research is focused on synthetic biology to integrate pathways for carbon dioxide assimilation into biochemical building blocks such as acetyl CoA, assembly of biological circuits with redox enzymes to transport electrons from bioelectrocemical, electricity or reduced chemicals to NADH and ATP production.
Microbial electrolysis cell scale-up for combined wastewater treatment and hydrogen production. The significant dependence of H-bonding and the pore-filling mechanism.
Bioelectrochemical Systems: An Outlook for Practical Applications | Article Information | J-GLOBAL
The study concludes with a discussion of the future perspectives of MEC technology for dWW treatment. Therefore, syatems acidification prior to the BES treatment Figure 2 D would likely increase its performance, degrading high-molecular-weight applicatjons into relatively simple VFAs, which are readily converted to electricity in a BES Li and Yu,even at low concentrations Lee et al.
Continuous electricity generation from domestic wastewater and organic substrates in a flat plate microbial fuel cell. Microbial Electrolysis Cells MECson the other hand, generate higher value products such as hydrogen, methane, etc, which makes them more feasible as far as economics is concerned.
Production of hydrogen from domestic ap;lications in a pilot-scale microbial electrolysis cell. Continuous feed microbial fuel cell using an air cathode and a disc anode stack for wastewater treatment. Sign In or Create an Account.
Although dWWTP can vary greatly in terms of their design, they often take the general form as shown in Figure 2 A, which includes the most characteristic elements of the water-treatment: However, before MEC technology may achieve practical implementation in dWWTPs, it need not only to overcome important techno-economic challenges, but also to compete with other energy-producing technologies.
A microbial fuel cell capable of converting glucose to electricity at high rate and efficiency. B The BES replaces the bioreactor in the secondary treatment. It gives an indication of the amount of organic matter dissolved into the wastewater and can be used to estimate the energy content of this organic material. A BES can be defined as an electrochemical system in which at least one of the anodic or cathodic reactions is microbially catalyzed Rabaey et al.
More recently, phosphorus was precipitated as struvite while simultaneously producing a significant amount of parctical in the cathode of an MEC Cusick and Logan, Another interesting application of BES is the treatment of inorganic and recalcitrant pollutants, such as nitrates, nitrites, dyes Mu et al.
Nevertheless, the selectivity and efficiency afforded via a combination of biocatalysis and electrocatalysis make these systems highly attractive in terms of process and appliations efficiency. It seems unlikely to build MEC units able to operate alone and treat several thousand of cubic meters per day. In general, the removal of these contaminants comprises a set outlpok physical, biological, and chemical treatment methods, the final arrangement depending on the type of WW to be treated.
For the sake of simplicity we will assume: This study offers an overview of the potential of using MEC technology in domestic wastewater treatment plants dWWTPs to reduce the energy bill.