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Effect of the ozonation pretreatment on biogas production from waste activated sludge of tehran wastewater treatment plant
, Article Biomass and Bioenergy ; Volume 152 , 2021 ; 09619534 (ISSN) ; Ghasemi, S ; Khosravi, A ; Vossoughi, M ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
In this study, the ozonation impact on anaerobic digestion of wasted thickened activated sludge of Tehran wastewater treatment plant has been investigated. Regarding that, the thickened activated sludge, a final solid waste of treatment plants, was subjected to ozonation pretreatment to evaluate its characteristics. Three major sludge characteristics were considered for investigating ozonation effects on anaerobic digestion. A comparison of two different ozone doses, i.e., 0.05 and 0.1 gO3 g−1TS was performed for short-term (10 days) and long-term (30 days) sludge retention times. Furthermore, biogas production, sludge composition, dewaterability, and energy balancing, were studied during...