Effects of Low- Intensity Ultrasound Treatment on Excess Sludge
DING Wen - Chuan, LONG Teng - Rui , XU Long , LI Li , LIAN He - chuan
DOI:10.11835/j.issn.1674-4764.2006.03.020
Received January 25, 2006,Revised January 25, 2006, Accepted , Available online July 01, 2015
Volume ,2006,Pages 74-77
- Abstract
In this study the influence of the low-intensity ultrasound treatment on excess sludge has been observed.The oxygen uptake rate(OUR),soluble chemical oxygen demand(SCOD),soluble total nitrogen(TN) and soluble total phosphorus(TP) were examined for three power levels of 0.03 W/mL, 0.05 W/mL and 0.1 W/mL as well as two time series of 0~5 min and 0~30 min.It showed that there were two stages of ultrasonic treatment: the first stage took place within the flocs in four minutes,in which SCOD,TN,TP were dissolved from flocs.In the second stage,the microbial activities have been strengthened,as well as OUR,TN,TP have increased greatly.