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Erschienen in: Journal of Material Cycles and Waste Management 3/2022

21.02.2022 | ORIGINAL ARTICLE

Effect of mixing ratio on sewage sludge and septage co-digestion

verfasst von: Changmin Lee, Xin Zhao, Jae Young Kim

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 3/2022

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Abstract

Septage, which is made up of liquid and solid materials pumped from septic tanks, can be a potential co-digestion resource for sewage sludge. This study was conducted to evaluate possibility of co-digestion of sewage sludge and septage. Biochemical methane potential tests were performed using primary sludge, secondary sludge and septage. The mixing ratio of the septage ranged from 30% to 62% (by volatile solid wt.) based on the typical ratio of the septage transported to municipal WWTP plants and the sewage sludge generated in the plants. The co-digestion of sewage sludge and septage showed synergistic effects on the methane potential due to the enhanced C/N ratio. The observed methane potential of co-digestion substrate was 8–16% higher than the predicted value based on weighted average of mono-digestion substrate's methane potentials. The maximum synergistic effect on methane potential was observed when 42% (by volatile solid wt.) of the septage was co-digested. In conclusion, the septage can be a suitable resource for co-digestion with sewage sludge.

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Metadaten
Titel
Effect of mixing ratio on sewage sludge and septage co-digestion
verfasst von
Changmin Lee
Xin Zhao
Jae Young Kim
Publikationsdatum
21.02.2022
Verlag
Springer Japan
Erschienen in
Journal of Material Cycles and Waste Management / Ausgabe 3/2022
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI
https://doi.org/10.1007/s10163-022-01372-2

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