Can Salt-Tolerant Sludge Mitigate the Salt Inhibition to Acidogenic Fermentation of Food Waste? Insight Into Volatile Fatty Acid Production and Microbial Community

For treatment of saline wastewater, the feasible approach to mitigate salt inhibition is using acclimated salt-tolerant sludge. The aim this work was verify if use sludge (AS) also could alleviate salinity stress on acidogenic fermentation food waste (FW) under environment. responses volatile fatty acid (VFA) production and microbial community were investigated. Results showed that VFA reduced by high (30 g/L 70 NaCl) compared with control (0 NaCl), especially for groups inoculated AS, whereas inoculating non-acclimated (non-AS) caused less reduction. impact seen accumulation more propionic acetic along traces butyric acid. Significant shift composition occurred upon biomass exposure salt. communities non-AS AS at same NaCl concentrations converged over time. contained a proportion phyla Bacteroidetes, Atribacteria Chloroflexi levels. These findings demonstrate conducive due presence higher proportions hydrolytic fermenting bacteria.