Evaluation of continuous mesophilic anaerobic sludge digestion after high temperature microwave pretreatment |
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| Authors: | Isil Toreci Kevin J. Kennedy |
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| Affiliation: | a Department of Chemical and Biological Engineering, University of Ottawa, 161, Louis Pasteur Room A412, Ottawa, ON, Canada, K1N 6N5
b Department of Civil Engineering, University of Ottawa, Ottawa, ON, Canada, K1N 6N5 |
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| Abstract: | Effect of microwave pretreatment (MW) high temperature (175 °C) and MW intensity to waste activated sludge digested with acclimatized inoculum in single- and dual-stage semi-continuous mesophilic anaerobic digesters at different sludge retention times (SRTs) (20, 10 and 5 days) were investigated. MW pretreatment led to similar sludge stabilization at low SRTs (5 and 10 days). Although lowering MW intensity slightly improved sludge solubilization, it had a negative effect on digestion at low SRTs. Single-stage digesters with MW pretreatment surpass dual-stage digesters performances. |
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| Keywords: | Microwave High temperature Pretreatment Waste activated sludge Sludge retention time Mesophilic anaerobic digestion |
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