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• W2214751344 startingPage "453" @default.
• W2214751344 abstract "Sequential anaerobic-aerobic digestion has been demonstrated to be effective for enhanced sludge stabilization, in terms of increased solid reduction and improvement of sludge dewaterability. In this study, we propose a modified version of the sequential anaerobic-aerobic digestion process by operating the aerobic step under mesophilic conditions (T=37 °C), in order to improve the aerobic degradation kinetics of soluble and particulate chemical oxygen demand (COD). Process performance has been assessed in terms of classical parameters such as volatile solids (VS) removal, biogas production, COD removal, nitrogen species, and polysaccharide and protein fate. The aerobic step was operated under intermittent aeration to achieve nitrogen removal. Aerobic mesophilic conditions consistently increased VS removal, providing 32% additional removal vs. 20% at 20 °C. Similar results were obtained for nitrogen removal, increasing from 64% up to 99% at the higher temperature. Improved sludge dewaterability was also observed with a capillary suction time decrease of ~50% during the mesophilic aerobic step. This finding may be attributable to the decreased protein content in the aerobic digested sludge. The post-aerobic digestion exerted a positive effect on the reduction of microbial indicators while no consistent improvement of hygienization related to the increased temperature was observed. The techno-economic analysis of the proposed digestion layout showed a net cost saving for sludge disposal estimated in the range of 28-35% in comparison to the single-phase anaerobic digestion." @default.
• W2214751344 created "2016-06-24" @default.
• W2214751344 creator A5054080783 @default.
• W2214751344 creator A5065862821 @default.
• W2214751344 creator A5076755055 @default.
• W2214751344 date "2016-03-01" @default.
• W2214751344 modified "2023-09-25" @default.
• W2214751344 title "Two-stage anaerobic and post-aerobic mesophilic digestion of sewage sludge: Analysis of process performance and hygienization potential" @default.
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• W2214751344 doi "https://doi.org/10.1016/j.scitotenv.2015.12.053" @default.
• W2214751344 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26760266" @default.
• W2214751344 hasPublicationYear "2016" @default.
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