Title :
Ultrasonic Pretreatment for Performance in Aerobic/Anoxic Sludge Digestion
Author :
Zheng Li ; Sun Shui-yu ; Xu Yan-bin ; Zhan Xing-xing ; Liu Bao-jian ; Cai Ming-Shan
Author_Institution :
Fac. of Environ. Sci. & Eng., Guangdong Univ. of Technol., Guangzhou, China
Abstract :
Effect of ultrasonic pretreatment on aerobic/anoxic sludge digestion was investigated. In the first part of this study, the ultrasonic conditions for sludge pretreatment was optimized with orthogonal experiment for achieving better biological activity and disintegration of sludge, then the influence of sonication on the aerobic/anoxic digestibility was studied. The results revealed that the optimal ultrasonic condition is 28kHz, 0.15W/mL for 10 min. The aerobic/anoxic digestion was improved by sonication, using ultrasonic irradiation with optimal parameters, the VSS removal efficiency at the optimal conditions was increased by 20.30%, and digestion time was shorten by 8 d, compared to the control.
Keywords :
sludge treatment; ultrasonic applications; ultrasonic waves; VSS removal efficiency; aerobic/anoxic digestibility; aerobic/anoxic digestion; aerobic/anoxic sludge digestion; biological activity; sludge disintegration; sludge pretreatment; sonication; ultrasonic conditions; ultrasonic irradiation; ultrasonic pretreatment; Acoustics; Biology; Inductors; Radiation effects; Solids; Time frequency analysis; Ultrasonic imaging; aerobic/anoxic digestion; sludge; ultrasonic pretreatment;
Conference_Titel :
Biomedical Engineering and Biotechnology (iCBEB), 2012 International Conference on
Conference_Location :
Macau, Macao
Print_ISBN :
978-1-4577-1987-5
DOI :
10.1109/iCBEB.2012.459
