In the present research, insights about the mechanisms of excess sludge minimization occurring in an oxic- settling-anaerobic (OSA) were provided. The investigation involved two systems operating in parallel. In particular, a conventional activated sludge (CAS) system as control and a system implementing the OSA process both having a pre-denitrification scheme were considered. Five periods (P1–P5) were studied, during which several operating conditions and configurations were tested. Specifically, the hydraulic retention time (HRT) in the anaerobic reactor of the OSA system (P1 8 h, P2–P3 12 h, P4 8 h, P5 12 h) and the return sludge from the anaerobic to the anoxic (scheme A) (P1–P2) or aerobic (scheme B) mainstream reactors (P3–P5) were investi- gated. The results highlighted that the excess sludge production in the OSA was lower in all the configurations (12–41%).

Corsino, S.F., Carabillo, M., Cosenza, A., De Marines, F., Di Trapani, D., Traina, F., et al. (2022). Insights on mechanisms of excess sludge minimization in an oxic-settling-anaerobic process under different operating conditions and plant configurations. CHEMOSPHERE, 312 [10.1016/j.chemosphere.2022.137090].

Insights on mechanisms of excess sludge minimization in an oxic-settling-anaerobic process under different operating conditions and plant configurations

Corsino, Santo Fabio
Primo
Methodology
;
Carabillo, Michele
Formal Analysis
;
Cosenza, Alida
Membro del Collaboration Group
;
De Marines, Federica
Investigation
;
Di Trapani, Daniele
Writing – Review & Editing
;
Traina, Francesco
Software
;
Torregrossa, Michele
Conceptualization
;
Viviani, Gaspare
Supervision
2022-11-02

Abstract

In the present research, insights about the mechanisms of excess sludge minimization occurring in an oxic- settling-anaerobic (OSA) were provided. The investigation involved two systems operating in parallel. In particular, a conventional activated sludge (CAS) system as control and a system implementing the OSA process both having a pre-denitrification scheme were considered. Five periods (P1–P5) were studied, during which several operating conditions and configurations were tested. Specifically, the hydraulic retention time (HRT) in the anaerobic reactor of the OSA system (P1 8 h, P2–P3 12 h, P4 8 h, P5 12 h) and the return sludge from the anaerobic to the anoxic (scheme A) (P1–P2) or aerobic (scheme B) mainstream reactors (P3–P5) were investi- gated. The results highlighted that the excess sludge production in the OSA was lower in all the configurations (12–41%).
Settore ICAR/03 - Ingegneria Sanitaria-Ambientale
https://reader.elsevier.com/reader/sd/pii/S0045653522035834?token=B1D50FAB7FB80C5722C05C27754542D41485957E60682D8A852565BB350DEED1070630867C85C552A6CDA6CB708E2F12&originRegion=eu-west-1&originCreation=20221214075031
Corsino, S.F., Carabillo, M., Cosenza, A., De Marines, F., Di Trapani, D., Traina, F., et al. (2022). Insights on mechanisms of excess sludge minimization in an oxic-settling-anaerobic process under different operating conditions and plant configurations. CHEMOSPHERE, 312 [10.1016/j.chemosphere.2022.137090].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/576648
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