Volatile fatty acids production from biowaste at mechanical-biological treatment plants: Focusing on fermentation temperature

Assessing the potential of waste activated sludge and food waste co-fermentation for carboxylic acids production

“…Fermentation batch assays were performed in 250 mL serum bottles under anaerobic conditions at mesophilic conditions (35 °C). Mesophilic conditions were selected since higher fermentation yields have been reported compared to psychrophilic and thermophilic conditions (Fernández-Domínguez et al, 2020;Jiang et al, 2013;Komemoto et al, 2009). Both mono-fermentation (FW and WAS controls) and WAS/FW co-fermentation assays contained a total of 150 g (on wet basis).…”

“…FW generation is estimated at 20% of the total food production in the European Union (EU), representing about 90 million tons per year (Braguglia et al, 2018;Poças Ribeiro et al, 2019). Anaerobic digestion and composting are the most common treatment options for FW in the EU; however, fermentation products have a higher potential market value and a wider range of applications than biogas and compost (Dahiya et al, 2018;Fernández-Domínguez et al, 2020). FW stands as an ideal substrate for acidogenic fermentation, with reported VFA yields ranging between 50 and 400 mgCOD/gVS depending on the fermentation conditions (Jiang et al, 2013;Lim et al, 2008).…”

Enhancing volatile fatty acids (VFA) production from food waste in a two-phases pilot-scale anaerobic digestion process

“…Compared to higher T examples [25], OFMSW fermentability at 37 • C was found to be less performing for COD and solids solubilisation (0.49 ± 0.02 and 0.33 ± 0.01 on COD TOT and initial VS respectively). However, the obtained high conversion VFA yield led to a high VFA content on soluble COD.…”

Cascading Integration of Electrofermentation and Photosynthesis—Low‐Carbon Biorefinery in Closed Loop Approach

“…[21][22][23] Energy efficiency with perpetual electron and carbon flux in EF systems needs to be widened to improve the scope of bioeconomy in terms of targeted product outcomes. [24][25][26] Integration of these processes with tertiary and polishing systems can also enhance further the cumulative influence on wastewater treatment with consideration of multiple parameters for near zero discharge. [27,28] In this context, residual EF effluents could be integrated to tertiary photosynthetic processes to achieve additional product, energy, and wastewater treatment benefits, accounting for low-carbon biorefinery platforms.…”