The consolidated bioprocessing (CBP) of corn stover pretreated via ammonia fiber expansion (AFEX-CS) into ethanol was investigated in a microbial electrolysis cell (MEC) driven by the exoelectrogen Geobacter sulfurreducens and the CBP bacterium Cellulomonas uda. C. uda was identified in a screening for its ethanologenic potential from AFEX-CS and for producing electron donors for G. sulfurreduc...

The hydrogen production rate in a microbial electrolysis cell (MEC) using a non-buffered saline catholyte (NaCl) can be optimized through proper control of the initial anolyte pH and catholyte NaCl concentration. The highest hydrogen yield of 3.3 0.4 mol H2/mole acetate and gas production rate of 2.2 0.2 m H2/m/d were achieved here with an initial anolyte pH 1⁄4 9 and catholyte NaCl concentrati...

Hydrogen production in a microbial electrolysis cell (MEC) can be achieved by either setting the anode potential with a potentiostat, or by adding voltage to the circuit with a power source. In batch tests the largest total gas production (46 3 mL), lowest energy input (2.3 0.3 kWh/m of H2 generated), and best overall energy recovery (sEþS 1⁄4 58 6%) was achieved at a set anode potential of EAn...

Hydrogen gas can be produced by electrohydrogenesis in microbial electrolysis cells (MECs) at greater yields than fermentation and at greater energy efficiencies than water electrolysis. It has been assumed that a membrane is needed in an MEC to avoid hydrogen losses due to bacterial consumption of the product gas. However, high cathodic hydrogen recoveries (78 +/- 1% to 96 +/- 1%) were achieve...

BACKGROUND While microbial electrolysis cells (MECs) can simultaneously produce bioelectrochemical hydrogen and treat wastewater, they consume considerable energy to overcome the unfavorable thermodynamics, which is not sustainable and economically feasible in practical applications. This study presents a proof-of-concept system in which hydrogen can be produced in an MEC powered by theoretical...

The anaerobic digestion (AD) and microbial electrolysis cell (MEC) coupled system has been proved to be a promising process for biomethane production. In this paper, it was found that by co-cultivating Geobacter with Methanosarcina in an AD-MEC coupled system, methane yield was further increased by 24.1%, achieving to 360.2 mL/g-COD, which was comparable to the theoretical methane yield of an a...

Nitrous oxide (N2O) is not only recognized as a potent greenhouse gas, but it also used in industry clean energy source. In this study, different electrode materials of carbon felt and graphite were equipped the ΔnosZ P. aeruginosa/microbial electrolysis cell (MEC) systems to explore optimization mechanism for long-term N2O recovery during incineration leachate treatment. The group showed bette...

An innovative biogas upgrading process consists in the utilization of a microbial electrolysis cell (MEC) which biocathode performs bioelectromethanogenesis reaction reducing CO2 into CH4 while an additional removal mechanism sorption as HCO3−, due to alkalinity generation catholyte. Here, two chamber 12-liter tubular MEC has been developed upgrade by using bioelectrochemical organic matter oxi...