Abstract: Taking the waste water treatment system of Huadian International Zouxian Power Plant as a example, using the secondary treated municipal wastewater and the sewage of power plant as the waste water source, the principle and method of lime coagulation and clarification treatment were introduced. Based on these, the selection of technology, the waste water treatment system, and process flow of reclaimed water deep treatment were described in detail, and three terms needing attention in lime coagulation and clarification treatment were proposed.

Key words: lime coagulation and clarification treatment, waste water, selection of technology, reclaimed water, application