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

fYear

2012

fDate

28-30 May 2012

Firstpage

1877

Lastpage

1880

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering and Biotechnology (iCBEB), 2012 International Conference on

Conference_Location

Macau, Macao

Print_ISBN

978-1-4577-1987-5

Type

conf

DOI

10.1109/iCBEB.2012.459

Filename

6245511