摘要
比较了活性污泥采用碱处理、碱处理与超声处理(20 kHz,150 W)不同组合预处理的效果.在溶解效果实验中,采用碱预处理,溶解性COD与TCOD的比值可增大到30.1%,再接超声处理,该比值可增大到79.3%;如同时采用碱和超声处理,该比值达到75.9%.在后续BAP实验中,初始活性污泥中挥发性脂肪酸与TCOD的比值小于10%,采用碱预处理,该比值可增大到30%,再接超声处理,该比值可增大到59%;如同时采用碱和超声处理,该比值达到最大值80%.此外,同时采用碱和超声处理可大大缩短预处理时间.因此,将碱和超声同时用于预处理,能有效增加活性污泥中挥发性脂肪酸的产量、改善后续的消化过程.
The study compared the effect of different methods for pretreating waste activated sludge （WAS）, including different combination of alkali treatment, alkali treatment and ultrasonic treatment （20 kHz, 150 W）. In the experimentstesting dissolution effect with the alkali pretreatment, the ratio of soluble COD to the total COD could be increased to 30.1%; if ultrasonic treatment followed, the ratio could be increased to 79.3%; if alkali and ultrasound treatment were used simultaneously, the ratio reached 75.9%. In the subsequent BAP experiment, the ratio of volatile fatty acid to the total COD in the initial activated sludge was less than 10%; by adopting alkali pretreatment, the ratio could be increased to 30%; if ultrasonic treatment followed, the ratio could be increased to 59%; if alkaline and ultrasonic treatments were adopted simultaneously, the maximum ratio of 80% was reached. In addition, the simultaneous use of alkaline and ultrasonic treatments could significantly shorten the pre-processing time. Therefore, simultaneously using alkali and ultrasound treatments could effectively increase the production of volatile fatty acids in activated sludge and improve the follow-up digestive process.
出处
《五邑大学学报（自然科学版）》
CAS
2009年第3期8-13,共6页
Journal of Wuyi University(Natural Science Edition)
基金
广东省自然科学基金资助项目(7300048)
关键词
碱处理
超声处理
厌氧消化
活性污泥
alkaline pretreatment
ultrasonic pretreatment
anaerobic digestion
waste activated sludge
