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UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature

Department of Civil Engineering & Architecture, University of Pavia, 27100 Pavia, Italy
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Academic Editors: Panagiotis Karanis, Layla Ben Ayed, Eleni Golomazou, Patrick Scheid, Ourania Tzoraki, Anna Lass and Muhammad Shahid Iqbal
Water 2022, 14(1), 115; https://doi.org/10.3390/w14010115
Received: 11 December 2021 / Revised: 3 January 2022 / Accepted: 4 January 2022 / Published: 5 January 2022
(This article belongs to the Topic Emerging Solutions for Water, Sanitation and Hygiene)
UASBs present several advantages compared to conventional wastewater treatment processes, including relatively low construction cost facilities, low excess sludge production, plain operation and maintenance, energy generation in the form of biogas, robustness in terms of COD removal efficiency, pH stability, and recovery time. Although anaerobic treatment is possible at every temperature, colder climates lead to lower process performance and biogas production. These factors can be critical in determining the applicability and sustainability of this technology for the treatment of urban wastewater at low operating temperature. The purpose of this study is the performance evaluation of a pilot-scale (2.75 m3) UASB reactor for treatment of urban wastewater at sub-mesophilic temperature (25 °C), below the optimal range for the process, as related to biogas production and organic matter removal. The results show that, despite lower methane production and COD removal efficiency compared to operation under ideal conditions, a UASB can still achieve satisfactory performance, and although not sufficient to grant effluent discharge requirements, it may be used as a pretreatment step for carbon removal with some degree of energy recovery. Options for UASB pretreatment applications in municipal WWTPs are discussed. View Full-Text
Keywords: UASB; anaerobic processes; domestic sewage; biogas; low temperature UASB; anaerobic processes; domestic sewage; biogas; low temperature
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MDPI and ACS Style

Cecconet, D.; Callegari, A.; Capodaglio, A.G. UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature. Water 2022, 14, 115. https://doi.org/10.3390/w14010115

AMA Style

Cecconet D, Callegari A, Capodaglio AG. UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature. Water. 2022; 14(1):115. https://doi.org/10.3390/w14010115

Chicago/Turabian Style

Cecconet, Daniele, Arianna Callegari, and Andrea G. Capodaglio. 2022. "UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature" Water 14, no. 1: 115. https://doi.org/10.3390/w14010115

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