| Summary: | In the experiment that the disposal of low temperature and low turbidity water, we observed the influence of some factors ,such as the acting time of ultrasound, ultrasonic power, amount of coagulant and the PH value of system, in disposing the organic matters of low temperature and low turbidity water. The experimental results show that the water samples which were disposed by ultrasound acting firstly and then by coagulation precipitate processing are best. When ultrasonic acting is 9 min, ultrasonic power transferred to 25 W, the amount of coagulant polyferric sulphate is 12 mg/L and the system pH is 7, the maximum of COD removal rate will up to 87.2%.
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