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EnglishtThis work analyzed the feasibility of pre-treatments to improve the anaerobic digestion (AD) of wasteactivated sludge (WAS) at 20◦C. We investigated different physicochemical pre-treatments (thermal at115◦C, thermo-alkaline at pH 10 and 70◦C and ozonation at 190 mg-O3L−1) by comparing their perfor-mances about COD solubilization and sludge disintegration rate. Best performances were obtained bythermo-alkaline pre-treatment, followed by thermal and ozonation; results were consistent with litera-ture. Pre-treated WAS was fed to 12 1-L anaerobic digesters operated in semi-continuous mode. Thermaland thermo-alkaline reactors produced biogas yields (0.30–0.36 m3kg−1VS in standard conditions, 65–70% methane) analogous to mesophilic conditions. The economic assessment of the scale-up of the wholeprocess demonstrated that thermo-alkaline pre-treatment made AD at 20◦C economically profitable forWAS generated by a 20,000 PE WWTP.
| Titolo: | Investigation of pre-treatments improving low-temperature anaerobic digestion of waste activated sludge |
| Autori: | |
| Data di pubblicazione: | 2019 |
| Rivista: | |
| Digital Object Identifier (DOI): | 10.1016/j.psep.2019.08.034 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| PSEP 2019 FINAL.pdf | versione finale a stampa | 2a. Post-print Versione editoriale | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
| PSEP_2019_1124_post print_clean.pdf | post print | 2. Post-print |  | Embargo: 04/09/2021 Richiedi una copia |
http://hdl.handle.net/11583/2756532
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