Synergism of co-digestion of food wastes with municipal wastewater treatment biosolids

Enhancing the Energy Efficiency of Wastewater Treatment Plants through Co-digestion and Fuel Cell Systems

“…This data is in line with literature works on co-digestion, where a 50:50 VS/TS ratio is usually proposed (Mattioli et al, 2014;Koch et al, 2015;Kim et al, 2016;Arnò et al, 2017). The biogas production increases by 151% thanks to codigestion.…”

“…Co-digestion is in fact also interesting because of the high availability of organic substrates (Hickey and Ozbay, 2014;Vilarino et al, 2017). Kim et al (2016) mentioned that that annual food waste in US could potentially generate the 0.12% of the total global electrical energy consumptions. Furthermore, anaerobic digestion of organic waste only could also generate criticalities in the process because of the low content in trace meals, excessive macro-nutrients, high C/N ratio and lipid content, and high variability of the composition.…”

“…Crawford and Sandino, 2010 Risk of digester overloading, especially with FOG and food waste Shen et al, 2015 Increase in biogas production (by balancing the C:N ratio and the biodegradability of sludge only digestion). Shen et al, 2015;Awe et al, 2016 Acceleration of methane production rates Kim et al, 2016 an increase in biogas production from 35% (in the first 25 days) to 99% (in the second 25 days). On the others side, these substrates also show high viscosity, thus leading to possible criticalities in the pumping section and requirements for plant modifications.…”

“…Kim et al (2016) also collected different works on codigestion and analyzed the effect of the co-substrate percentage on the methane yield of the reactor. Unfortunately, there is not a clear correlation between co-digestion feedstock and methane yield among different works, because many other process parameters are influencing the biogas production rate.…”

Biosolids and Sludge Management

“…Co-digestion. Co-digestion with substrates such as food waste (Algapani et al, 2017;Cousens et al, 2017;Dixon et al, 2017;Keleman et al, 2017;Kim et al, 2017;Li, Li et al, 2017); fats, oils, and greases (FOG) (Grosser et al, 2017;Gupta et al, 2017;Kashi et al, 2017); cow manure (Gaur and Suthar, 2017;Ziels et al, 2017b); organic fraction of municipal solids waste (Mattioli et al, 2017); glycerol (Kurahashi et al, 2017;Maragkaki et al, 2017); olive mill Grosser (2017) Composting. An overview of compost quality assessment along with appropriate usage for vegetable production was given by Hampton (2017).…”