The waste water from thermal power plant under Qilu Petrochemical Corp

including daily-life sewage and discharged water from fishpond

has been treated by using techniques of aerated biological filtration

coagulated air-floatation

filtering

and bacteriside etc.

the waste water after treatment being used as make-up water for circulating water system. The results show

the treatment technology to be reasonable

the operation of said system to be stable

the turbidity of delivery water ≤ INTU

COD Mn ≤5mg/L

the ammoniacal nitrogen≤2mg/L

the heterotrophic bacteria≤1000 unit/mL

meeting the quality requirements of make-up water for circulating water system. Through cost accounting

recovery of one ton waste water can economize RMB 4.95 yuan

the investment being recouped only within one year

having obvious benefits in economic and environmental aspects.