Effects of Ultrasound on Must Hospital Composite Wastewaters.
Final rept. 1 Jan-30 Nov 77,
ARIZONA UNIV TUCSON DEPT OF CIVIL ENGINEERING
Pagination or Media Count:
This research examined the effect sonic and ultrasonic sound waves had 1 in an ozone reactor during the oxidation of synthetic MUST Hospital Composite ultrafiltration UF and reverse osmosis RO permeates using low volumetric gas flow rates i.e., volume of gas per minute per volume of liquid VVM of 0.1, 0.2, and 0.4 VVM, 2 on the mass transfer of oxygen into solution at the above VVMs, and 3 on the air-stripping of UF permeates at 45 C. Kinetic mathematical models were derived to express the rate of COD and TOC destruction as a function of ozone concentration, VVM and organic concentration. These models can be used for design and scale-up of similar ozone-sound reactors. Insonation was found to increase system overall oxygen mass transfer coefficients in the range of 1 to 36 over the no sound condition. Improvements in air-stripping rates of organics in UF permeates were noted when sound waves were employed over previously reported plain air-stripping experiments.
- Water Pollution and Control