ULTRASONIC INTENSIFICATION OF AEROBIC STABILIZATION OF SEWAGE SLUDGE
Journal Title: Civil and Environmental Engineering Reports - Year 2007, Vol 1, Issue 2
Abstract
The aerobic stabilization of excess sewage sludge using low frequency ultrasound (25kHz) was investigated. The mechanically thickened excess sludge was obtained from full-scale wastewater treatment plants. The samples of sewage sludge were prepared by dissolving drinking water to obtain initial total solid concentration of 1800 mg/dm3. Five samples were treated with ultrasound of different power per sample volume: 3,12; 6,25; 12,5; 25,0 and 50,0 Wh/l. The experiments show that ultrasonic pre-treatment with 50 Wh/dm3 power increases the digestion of organic matter in aerobic stabilization of sewage sludge.<br/><br/>
Authors and Affiliations
Piotr SORYS, Ewa ZIELEWICZ
Keywords
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