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http://dx.doi.org/10.4491/eer.2009.14.1.048

Effect of Temperature-increase Rate and Terminal Temperature on the Solubilization of Sewage Sludge using Microwave Irradiation  

Park, Woon-Ji (Division of Environmental and Geosystem Engineering, College of Engineering, Kangwon National University)
Ahn, Johng-Hwa (Division of Environmental and Geosystem Engineering, College of Engineering, Kangwon National University)
Lee, Chan-Ki (Division of Environmental and Geosystem Engineering, College of Engineering, Kangwon National University)
Publication Information
Environmental Engineering Research / v.14, no.1, 2009 , pp. 48-52 More about this Journal
Abstract
Solubilization of sewage sludge creates favorable conditions for anaerobic microorganisms to produce biogas. In this paper, we quantify the effect of heating pretreatment on the degree of solubilization of sewage sludge. The pretreatment process was carried out using a lab-scale industrial microwave unit (2450 MHz frequency). Response surface analysis was applied to determine the combination of temperature-increase rate (ramp rate) (2.9 to 17.1 ${^{\circ}C}$/min) and terminal temperature (52 to 108${^{\circ}C}$). Both ramp rate and temperature significantly affected the solubilization degree of sludge. Within the design boundaries, the conditions predicted to maximize the solubilization degree of 15.8% were determined to be 2.9 ${^{\circ}C}$/min and 104${^{\circ}C}$.
Keywords
Anaerobic digestion; Central composite design; Optimization; Pretreatment; Response surface analysis;
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Times Cited By KSCI : 1  (Citation Analysis)
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