Bioelectrochemically assisted anaerobic digestion system for biogas upgrading and enhanced methane production

Food‐processing wastes

“…Addition of food waste produced effluents with lower effluent nitrogen (3.6-7.9.g/L for BNR; 0.6-1.3 mg/L for A2O; 1.0-2.3 mg/L for Bardenpho), reduced operating costs of between 25% and 78% for various processes analyzed, and produced a net energy gain of 3,300-3,700 kWh/ day for a 10 MGD plant. Dou, Dykstra, and Pavlostathis (2018) and Dou, Toth, and Westendorf (2018) indicated that the cost/benefit ratios of wetfeed treatment, dry-feed treatment, composting, and incineration are 2.0, 4.0, 4.9, and 5.1, respectively. The cost/benefit ratio increases to 10.2 and 40.4 for anaerobic digestion for electricity and landfill, respectively.…”

“…Dou, Dykstra, and Pavlostathis (2018) and Dou, Toth, and Westendorf (2018) indicated that the cost/benefit ratios of wet‐feed treatment, dry‐feed treatment, composting, and incineration are 2.0, 4.0, 4.9, and 5.1, respectively. The cost/benefit ratio increases to 10.2 and 40.4 for anaerobic digestion for electricity and landfill, respectively.…”

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

“…Conventional AD has been used for waste treatment, and consists of the following four major processes: hydrolysis, acidogenesis, acetogenesis, and methanogenesis . Integration of AD with BES can enrich exoelectrogens (anode) and hydrogenotrophic methanogens (cathode) . The degradation rate of recalcitrant compounds in wastewater is higher in the integrated MEC‐AD system, and the effluent has been found to have low organics and ammonium contents .…”

“…The degradation rate of recalcitrant compounds in wastewater is higher in the integrated MEC‐AD system, and the effluent has been found to have low organics and ammonium contents . Dou et al . reported that an MEC‐AD had higher resilience to shock organic loading, and a potential of 2 V resulted in water electrolysis and led to a higher CH 4 production rate (105 mL L −1 day −1 ) and biogas CH 4 content (88.5 + 1.4%).…”

Performance, process kinetics and functional microbial community of biocatalyzed electrolysis-assisted anaerobic baffled reactor treating carbohydrate-containing wastewater

“…This reveals that the maximum rate of consumption of COD gradually decreased from C1 to C5. According to the Stover-Kincannon model, the relationship between S e , S i and the HRT is described by eqn (9). To further conrm the accuracy of the Stover-Kincannon model, eqn (9) was used to predict the concentration of COD (Fig.…”