Benefits and drawbacks of integrating a side-stream sludge fermenter into an A2O system under limited COD conditions
Zhang, Congcong (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Guisasola, Albert (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Oehmen, Adrian (University of Queensland)
Baeza Labat, Juan Antonio (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Date: |
2023 |
Abstract: |
The implementation of a side-stream sludge fermenter (SSSF) has been identified as a possible solution to improve the performance of an anaerobic/anoxic/aerobic (A2O) configuration when treating low COD wastewater. This study systematically evaluated the effects of incorporating a SSSF into an A2O configuration (side-stream enhanced biological phosphorus removal, S2EBPR) for P/N/COD removal under a limited influent COD (CODINF) condition. The performance of the S2EBPR (with the SSSF receiving 6% of the recycled activated sludge and operating with a hydraulic retention time (HRT) of 2. 4 d) and A2O were compared under the same limited CODINF (350 mg/L) condition. S2EBPR improved the amount of P removed (26. 6%) under a low influent COD/P of only 26. 3 compared with A2O of 32. 6, and enhanced denitrification (11%) without compromising full ammonium and COD removal. However, the PLOAD to the plant increased due to the P-release in SSSF, resulting in higher effluent P concentration. The methane and energy recovery indexes were around 45% lower than those of A2O. Sequencing analysis revealed a high abundance of PAO in accordance to its higher P removal. This study represents a comprehensive evaluation of the S2EBPR configuration and provides an assessment of its suitability. |
Grants: |
Agencia Estatal de Investigación PID2020-119018RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-515
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Note: |
Altres ajuts: acords transformatius de la UAB |
Rights: |
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Language: |
Anglès |
Document: |
Article ; recerca ; Versió publicada |
Subject: |
Anaerobic/anoxic/aerobic (AO) ;
COD limitation ;
Enhanced biological phosphorus removal (EBPR) ;
Side-stream enhanced biological phosphorus removal (S2EBPR) ;
Side-stream sludge fermenter (SSSF) |
Published in: |
Chemical engineering journal, Vol. 468 (July 2023) , art. 143700, ISSN 1873-3212 |
DOI: 10.1016/j.cej.2023.143700
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Record created 2023-07-25, last modified 2024-03-10