[Improvement of disintegration and anaerobic digestion for sewage sludge with ultrasonic generator].
Ultrasonic generating trough was applied to study the impact of ultrasonic on conditioning of sewage sludge. There are few ultrasonic generators for sludge treatment specifically, so we designed a double-frequency ultrasonic generating trough which could adjust frequency, energy density and treating time flexibly. In the research characteristics of sewage sludge treated by single-frequency and double-frequency ultrasonic were compared. According to the results, the digestion biogas of the sewage sludge treated by ultrasonic increase obviously, and the digestion biogas increment of the sewage sludge treated by single-frequency is 40.93%, higher than that treated by double-frequency. But the SCOD of the sewage sludge treated by double-frequency is 23.5%, more than that treated by single-frequency.
Jiang
Jian-Guo
JG
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. jianguoj@tsinghua.edu.cn
Zhang
Yan
Y
Zhang
Qun-Fang
QF
Chen
Mao-Zhe
MZ
Du
Xue-Juan
XJ
D000693:Anaerobiosis; D010316:Particle Size; D012722:Sewage / Q000737:chemistry*; D014465:Ultrasonics; D014865:Waste Disposal, Fluid / Q000379:methods*
D012722:Sewage