The wastewater discharged from industry parks mainly consists of chemical industrial wastewater and non-chemical industrial wastewater.  Alternatively, chemical industrial wastewater has the characteristics of toxicity and irritation, high concentration of organic matter, complex composition, unstable pH value, more nutritive substances, difficult treatment, and poor biodegradability.

Through suitable pretreatment, the pollutant concentrations can be decreased with balanced water qualit, eliminated ring-opening fractures and removal of toxicity, thus improving biodegradability of the wastewater for better biochemical treatment.

Finally, through the applications of catalytic oxidation technology, the drainage can be deeply oxidized to qualify the national standard discharge requirements.