Data-driven model for feedstock blending optimization of anaerobic co-digestion by BMP maximization

Understanding Anaerobic Co-digestion of Organic Wastes through Meta-Analysis

“…The ideal CR for maximizing methane production depends on the intrinsic qualities of the substrate, including its macromolecule and fiber composition, nutrient profile, and the presence or generation of potential inhibitors, such as long-chain fatty acids (LCFAs), sulfide, ammonia, humic acid, and dissolved lignin. 7−10 While the optimal C/N ratio is typically associated with achieving digester stability and enhanced methane yield, studies have identified optimal C/N (C/N Opt ) ratios for certain co-substrates that differ from the stoichiometric C/N range, including sewage sludge (SS):onion juice (C/N Opt = 15), 11 SS:shredded grass (C/N Opt = 10), 12 and Sida hermaphrodita:microalgae (C/N Opt = 15−21), 13 indicating that co-substrates have a range of effects on AcoD, from synergistic 14−16 to antagonistic, 17,18 neutral, 19−21 or mixed effects. 22 Long-term studies covering at least three hydraulic retention times (3-HRTs) to achieve a steady state are essential to thoroughly understand the interactions of co- substrate metabolites and chronic toxicity.…”

“…While the optimal C/N ratio is typically associated with achieving digester stability and enhanced methane yield, studies have identified optimal C/N (C/N Opt ) ratios for certain co-substrates that differ from the stoichiometric C/N range, including sewage sludge (SS):onion juice (C/N Opt = 15), SS:shredded grass (C/N Opt = 10), and Sida hermaphrodita:microalgae (C/N Opt = 15–21), indicating that co-substrates have a range of effects on AcoD, from synergistic − to antagonistic, , neutral, − or mixed effects . Long-term studies covering at least three hydraulic retention times (3-HRTs) to achieve a steady state are essential to thoroughly understand the interactions of co-substrate metabolites and chronic toxicity.…”

Biochemical Methane Potential Assays for Organic Wastes as an Anaerobic Digestion Feedstock

“…The anaerobic digestion (AD) process is a widely applied technology to treat several feedstocks from different sources, like manure (dairy, pig, sow, chicken, sheep, and goat), agricultural waste (straw rice husk, sugar, dry grass, maize, corn, and potato), organic waste (food waste, fruit and vegetables, organic fraction of municipal solid waste, slaughterhouse waste, and exhaust kitchen oil) and sludge (sewage sludge and food industry sludge) [1,2]. This process also allows for the reduction in greenhouse gas emissions because it treats waste that would otherwise be sent to landfill.…”

“…In recent decades, the anaerobic digestion process has received increasing attention due to the recovery of energy [2,3] from biogas production, which contributes to achieving the targets of renewable energies [1,4]. Renewable energy sector growth is extremely important with simultaneous socio-economic development in order for all European member states to become climate neutral.…”

“…Sustainability 2023, 15, 11573 2 of 29 Also, the solid residue resulting from AD and designated by digestate can be used as a fertilizer or soil additive due to the nutrients and organic contents [2,7], contributing to the circular economy. On average, the digestate amount can be estimated by a factor of 75 t of digestate (dry matter) per GWh of biogas or biomethane produced.…”