Treatment of Source Water from South-to-North Water Diversion Project Mixed with Reservoir Water by Pre-oxidation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
9 9
Page:
36-41
Column:
Date of publication:
2020-05-01
- Keywords:
-
pre-oxidation
; coagulation; source water from South-to-North Water Diversion Project; response surface analysis; chlorophyll a; turbidity
- Abstract:
-
Based on dual water sources of Handan water supply system, source water from South- to-North Water Diversion Project mixed with local reservoir water was treated by pre-oxidation enhanced coagulation process. The optimum dosage of PAC and sodium hypochlorite were 5-15 mg/L and 0.1-1.0 mg/L respectively, and the opitimum stirring speed of slow reaction was 60-100 r/min. The Box-Behnken method was used to optimize the single factor test parameters of the process, and a secondary regression model with the response value(chlorophyll a and turbidity removal rates)and PAC dosage,sodium hypochlorite dosage and slow reaction stirring speed were established. The optimal process parameters obtained by Design-Expert software were as follows: PAC dosage of 11.85 mg/L, sodium hypochlorite dosage of 0.88 mg/L and slow reaction stirring speed of 67 r/min. Under the optimal condition, the predicted removal rates of chlorophyll a and turbidity were 93.27% and 90.79%, respectively, which were close to the measured values of 93.26% and 90.85%.
Last Update:
2020-05-01