Assessing the potential of waste activated sludge and food waste co-fermentation for carboxylic acids production
نویسندگان
چکیده
This study investigated waste activated sludge (WAS) and food (FW) co-fermentation in batch assays to produce carboxylic acids. Three mixtures (50%, 70% 90% WAS VS basis) were studied under different conditions: with without extra alkalinity, auto-hydrolysis pre-treatment. All tests carried out at 35 °C, pH adjustment external inoculum. Experimental results showed that yields, including volatile fatty acids lactic acid, always higher than FW mono-fermentation yields (ca. 100 80 mgCOD/gVS, respectively). Co-fermentation increased as the proportion of mixture increased, indicating improvement was primarily due a degradation conditions. The maximum yield on average 480 mgCOD/gVS for WAS/FW_50/50 mixture. importance performance evident experiments which should be high enough keep above 5.0. However, fermenters operational conditions also prevent enrichment acetic acid consuming microorganisms. pre-treatment did not enhance but minor kinetic improvements. Regarding product profile, butyric enriched concomitant decreased detriment propionic acid. Propionic prevailed neutral WAS/FW_90/10
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2021
ISSN: ['0048-9697', '1879-1026']
DOI: https://doi.org/10.1016/j.scitotenv.2020.143763