[Ultrasonic removal of organic pollutants in tannery waste water].
The effect of ultrasonic treatment on flocculating settling of tannery effluent was studied, removal of COD in particular was did. The influences of irradiation method and duration of ultrasonic as well prescription of coagulants on the efficiency of minimizing organic chemicals in waste water were investigated. The results show that: 1. when waste water was treated only by ultrasonic for 60s, the removal rate of COD was 40.6%; 2. when total concentration of coagulants increased to 100 mg/L, the highest removal rate of COD was achieved; 3. when waste water was firstly treated with ultrasonic for 60s, then flocculated with coagulants, the removal rate of COD came to 73.2%, 10% higher than the control without ultrasonic. Thus the treatment of tannery waste water with flocculating settling technology can be effectively strengthened by ultrasonic.
Li
G
G
Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China.
He
Y
Y
Shi
B
B
Gao
X
X
D007220:Industrial Waste; D012722:Sewage; D014465:Ultrasonics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D012722:Sewage; D014874:Water Pollutants, Chemical