Water treatment method by catalyzing ozone with a persulfate

摘要

A water treatment method by catalyzing ozone with a persulfate comprises the following steps: introducing the ozone into an ozone contact reactor filled with water to be treated; at the same time putting the persulfate into the reactor, wherein a stirring state is kept in the water treatment process. The method solves the problems of difficulty in the ionization of hydrogen peroxide, low capability in inducing the decomposition of the ozone, high hydrogen peroxide residues and inconvenience of hydrogen peroxide transportation and storage existing in the conventional water treatment method for catalyzing the ozone by using the hydrogen peroxide. Hydroxyl radicals and sulfate free radicals with strong oxidizing properties, which are generated by catalyzing ozone with the persulfate, are oxidized to remove pollution, so that the method has the advantages of high catalytic capability, high oxidative degradation efficiency, wide pH application range, a small amount of catalyst residues, convenience of operation and the like, and can be applied in mass production.

主权项

1. A water treatment process by catalyzing ozone with a persulfate, characterized in that: the water treatment process by catalyzing ozone with a persulfate comprises the steps of:
(a) filling water subject to treatment into an ozone contact reactor; (b) simultaneously introducing ozone and adding persulfate into an ozone contact reactor such that the ozone has an initial concentration of 0.1˜40 mg/L and a molar ratio of persulfate to ozone is 1:0.1˜10, wherein a hydraulic retention time of the water subject to treatment in the ozone contact reactor is 5˜60min, and the water subject to treatment is kept at a stirring condition during the water treatment process, then the water treatment process is complete, wherein the water subject to treatment is polluted water, secondary effluent from wastewater treatment plant, water from any water source or filtered water.