Study on performance enhancement of anaerobic digestion of municipal sewage sludge
Access Status
Open access
Authors
Yeneneh, Anteneh Mesfin
Date
2014Supervisor
Prof. Ming Ang
Dr Ahmet Kayaalp
Dr Tushar Kanti Sen
Type
Thesis
Education Level
Ph.D.
Metadata
Show full item recordAbstract
This research focuses on investigating effects of combined microwave-ultrasonic pretreatment of municipal sewage sludge on anaerobic digester performance. Application of a novel combined microwave-ultrasonic pretreatment on thickened excess activated and mixed sludge significantly improved methane production, volatile solid and COD reduction, digestion kinetics, pathogen removal and dewaterability. Effects of Organic loading rate, sludge retention time and sludge mixing ratio were studied. Microwave and ultrasonic pretreatment conditions and digester operational parameters were optimized using experimental and modelling techniques.
Faculty
Faculty of Science and Engineering, Department of Chemical Engineering
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Yeneneh, Anteneh; Kayaalp, A.; Sen, Tushar; Ang, Ming (2015)This research paper presented a comparative result on microwave (M) pretreatment and combined microwave-ultrasonic (CMU) pretreatment of mixed sludge. The mixed sludge was composed of 75% primary sludge (PS) and 25% ...
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Yeneneh, Anteneh Mesfin; Sen, Tushar; Ang, Ha Ming; Kayaalp, A.; Kayaalp, N M. (2014)Sewage sludge is categorised under the class of non-Newtonian fluids and it manifests shear thinning behaviour. The flow patterns and rheology of sludge in wastewater treatment plants particularly before and after the ...
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Yeneneh, Anteneh; Chong, Siew; Sen, Tushar; Ang, Ha Ming; Kayaalp, A. (2013)Anaerobic digestion is one of the most effective means for the stabilisation of sludge. However, it has a very slow rate-limiting hydrolysis phase which is attributed to the low biodegradability of cell walls and the ...