Abstract: After advanced treatment, the regenerated water can be reused as circulating cooling water of power plant. The advanced treatment process of the petrochemical waste water in a power plant was introduced. In this process, the aeration biological fluidized tank + coagulation clarification process were adopted to treat the petrochemical waste water; the coagulation clarification treatment with adding lime was adopted to treat the exhaust waste water of power plant circulating water. The two kinds of waste water are merged, and then are filtered in the filter with variable holes. The quality of the output water of the filter can attain the standard of power plant circulating cooling water and is used in production.

Key words: regenerated water, petrochemical waste water, circulating cooling water, aeration biological fluidized tank