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http://dx.doi.org/10.4491/KSEE.2011.33.9.636

Study on Characteristics of Solubilization for Sewage Sludge Using Electronic Field and Ultrasonification  

Seo, Jang-Won (Environmental Engineering, Inha University)
Han, Ji-Sun (Environmental Engineering, Inha University)
Ahn, Chang-Min (Environmental Engineering, Inha University)
Min, Dong-Hee (Environmental Engineering, Inha University)
Yoo, Yeon-Sun (Environmental Engineering, Inha University)
Yoon, Soon-Uk (Environmental Engineering, Inha University)
Lee, Jong-Gyu (Research Institute of Industrial Science & Technology)
Lee, Jong-Yeon (Korean Environment Corporation)
Kim, Chang-Gyun (Environmental Engineering, Inha University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.33, no.9, 2011 , pp. 636-643 More about this Journal
Abstract
Sludge solubilization using sonification has been increasingly used for sludge volume reduction along with enhancing digestion efficiency during anaerobic biogas production. In this study, either electric field or ultrasonification or in combination with were investigated using three types of sludge (return, excess and mixed at G sewage treatment facility) for the most efficient solubilization. As a the closed loop, 200 L of sludge was continuously passing through the solubilization system at an average flow rate of $0.7m^3/h$, which is equivalent to 3.5 times treated per hour for up to 84 times (24 h). Only implying electric field showed no variation for sCOD/tCOD before and after treatment on sludge solubilization regardless of types of sludge. However, employing the ultrasonic or combined system could both increasingly solubilize sludge with regard to the number of passing-through, which more enhanced by the combined. In addition, VSS/TSS was lowered to in the range of 2 and 6% while its particle size, diameter (0.9) and diameter (0.5) were more minimized than that of raw sludge. For return sludge, ultrasonification was more efficiently facilitated for solubilization, whereas electric field-ultrasonification was more preferably applied for excess and mixed sludge. It is concluded that depending on types of sludge, solubilization system must be selectively applied for the most efficient break-up of them.
Keywords
Sludge; Solubilization; Ultrasound; Electric Field; Combined Treatment;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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