| Summary: | 碩士 === 嘉南藥理大學 === 環境工程與科學系 === 107 === This study focuses on the treatment of high turbidity raw water for pre-treatment of purified water. The use of traditional coagulants in the treatment of high turbidity raw water requires a large amount of chemicals to be added and takes a long time, in order to find the dosage conditions for the removal of algae by the new coagulant. The removal rate of algae was investigated by adding modified magnetic particles with the addition of bismuth iron to iron in the laboratory. In this study, the high-algae raw water of (360~440) NTU was prepared by using the raw water mixed with algal water of Lantan Reservoir.
The parameters of the modified magnetic particles and the pH value were changed with polyferric citrate, and the optimum dosage was determined by the jar test. The amount, and then compare the higher turbidity (760 ~ 840) NTU algae water algae removal effect, the microscopic observation of the blood cell counter to calculate the algae removal rate, the results show that at (360 ~ 440) NTU at pH 7 conditions 10 (mg / L) PSI is best with 2 grams of modified magnetic particles (algae removal rate is 99.996%); (760~840) NTU is 20 (mg/L) PSI with 2 grams of modified magnetic particles at pH7 Good (algae removal rate of 96.33%).
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