Effects of different particle size of zero-valent iron (ZVI) during anaerobic digestion: Performance and mechanism from genetic level

Co-digestion of food waste and hydrothermal liquid digestate: Promotion effect of self-generated hydrochars

“…Bacteroidetes represents acid-forming bacteria that can be capable of converting arabinose, glucose, cellobiose, starch, and other substances into acetic acid, butyric acid, isovaleric acid, H 2 , and CO 2 [ 51 ]. The increase in the abundances of Bacteroidetes in FW-SDFW, FW-SH140, and FW-SH180 during the acidogenesis stage indicated the presence of more favorable conditions, such as the pH.…”

Culture adaptation for enhanced biogas production from birch wood applying stable carbon isotope analysis to monitor changes in the microbial community

“…Family members of Actinobacteriota are abundant in lignin and fiber-rich environments. These families can degrade complex plant materials and recalcitrant polymers including cellulose and hemicellulose converting them to monosaccharides and volatile acids [ 77 – 79 ]. Fibrobacteraceae can be found in the cattle rumen that contribute in complete degradation of cellulosic materials through generation of cellulases enzyme [ 80 ].…”

“…Bacteroidota can generate a wide range of extracellular hydrolytic enzymes converting glucose, arabinose, cellobiose and other carbohydrates in lignocellulosic biomass to acetic acid, butyric acid, isovaleric acid, Propionic, H 2 and CO 2 [ 92 ]. An increase in the relevant abundance of Rikenellaceae , Bacteroidales _UCG-001 and GZKB124 belonging to Bacteroidota phylum as a result of a long-term operation with SEBW and CM reveal that the microbial community adaptation improved hydrolysis efficiency [ 77 , 89 ].…”

Effects of micron-scale zero valent iron on behaviors of antibiotic resistance genes and pathogens in thermophilic anaerobic digestion of waste activated sludge

“…Recently, micron zero valent iron (mZVI) has attracted widespread interest as a costeffective agent in improving methane production in AD of food waste (Jing et al, 2022), swine manure (Yang et al, 2018b), and glucose-substrate (Zhong et al, 2022). Also, it has been observed that mZVI performed well in eliminating ARGs in various AD applications, such as wastewater treatment (Xu et al, 2021b), co-digestion of waste sludge and kitchen waste (Gao et al, 2017), and swine manure treatment (Zhang et al, 2018).…”

“…However, current investigations on the effect of ZVI on the overall abundance and diversity of ARGs in sludge AD process have mainly focused on nano-sized ZVI (nZVI). Yet, considering the different effects on physiochemical properties and microbial composition induced by ZVI with various particle sizes (Xu et al, 2021a;Zhong et al, 2022), the role of mZVI in the TAD process regarding the entire antibiotic resistome in WAS has not been fully explored.…”