Enhancing excess sludge aerobic digestion with low intensity ultrasound①
来源期刊：中南大学学报(英文版)2006年第4期
论文作者：丁文川 李懂学 曾晓岚 龙腾锐
文章页码：408 - 411
Key words：low intensity ultrasound; excess sludge; aerobic digestion; kinetics
Abstract: In order to enhance the efficiency of aerobic digestion, the excess sludge was irradiated by low intensity ultrasound at a frequency of 28 kHz and acoustic intensity of 0.53 W/cm2. The results show that the sludge stabilization without ultrasonic treatment can be achieved after 17 d of digestion, whereas the digestion time of ultrasonic groups can be cut by 3-7 d. During the same digestion elapsing, in ultrasonic groups the total volatile suspended solid removal rate is higher than that in the control group. The kinetics of aerobic digestion of excess sludge with ultrasound can also be described with first-order reaction.
