[Organic pollutants biodegradation in micro-polluted water enhanced by ultrasonic].
The effect of ultrasonic on the biotreatment of micro-polluted source water in a membrane bioreactor was studied through contrast experiments between the membrane bioreactor with and without ultrasonic. The results showed that ultrasonic at proper intensity could improve biological activity, increase organic load of the bioreactor, and enhance the removal of organic matters. The study of TTC-DHA of the bacteria and apparent molecular size distribution (AMSD) of organic compounds in the influent and effluent in the contrast experiments further proved that ultrasonic enhanced the bioactivity of the membrane bioreactor. The experiments with ultrasonic at different powers showed that ultrasonic at 10 W enhanced bioactivity most effectively. The effect of ultrasonic changed with running time. It was found that ultrasonic effect could be maintained for 24 hours, so the interval of ultrasonic treatment could be set at 24 hours. The mechanism of biological activity enhancement by ultrasonic was also investigated.
State Key Joint Laboratory of Environmental Simulation and Pollution Control, Institute of Environmental Sciences, Beijing Normal University, Beijing 100875, China. LH64@sina.com
Hong
H
Liu
Yun-hua
YH
He
Shan-li
SL
Zhang
Wei
W
Ouyang
D001673:Biodegradation, Environmental; D019149:Bioreactors; D009930:Organic Chemicals / Q000032:analysis; D014465:Ultrasonics; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis*
D009930:Organic Chemicals; D014874:Water Pollutants, Chemical