Residual municipal solid waste as co-substrate at wastewater treatment plants: An assessment of methane yield, dewatering potential and microbial diversity
نویسندگان
چکیده
Separately collected organic fraction of municipal solid waste, also known as biowaste, is typically used to fill the available capacity digesters at wastewater treatment plants. However, this approach might impair use ensuing digestate for fertilizer production due presence sewage sludge, a contaminated substrate. Worldwide, unsorted household i.e. residual still disposed in landfills or incinerated, despite its high content biodegradables and recyclables. Once efficiently separated from waste by mechanical processes, be appropriate substitute biowaste Thus, would contribute reduction demand on non-renewable fertilizers. This study aimed determining technical feasibility co-digesting mechanically with sludge. Further, key parameters implementation co-digestion plants were determined, namely, degradation solids organics, specific methane production, flocculant demand, dewatered sludge production. The microbial community diversity both mono- was investigated. Semi-continuous laboratory scale experiments showed that co-substrate derived provided stable anaerobic process, producing 206 245 L per kg volatiles added digester. dewaterability increased 4.8 percentage points when added; however, there an increase demand. 955 ton total Amplicon sequencing analysis detailed insight into communities, which primarily affected addition co-substrate. microbiota fully functional no inhibition problems digestion process observed after addition.
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2022
ISSN: ['0048-9697', '1879-1026']
DOI: https://doi.org/10.1016/j.scitotenv.2021.149936