本研究著重於淨水前處理之高濁原水處理，在處理高濁度原水時使用傳統混凝劑，需添加大量藥劑且耗時頗長，為尋求新型混凝劑除藻之加藥量條件，以實驗室自製矽鐵比1的聚矽酸鐵搭配添加改質磁性顆粒對藻類進行去除率的探討。
本研究使用蘭潭水庫原水混合藻水調製成(360~440)NTU之高藻原水，以聚矽酸鐵搭配改質磁性顆粒參數與pH值的變化，藉由瓶杯試驗找出最適加藥量，然後再比較更高濁度(760~840) NTU藻水的除藻效用，以顯微鏡觀察血球計數器計算藻類去除率，結果顯示在(360~440) NTU時以pH7條件下10(mg/L)PSI搭配2克改質磁性顆粒為最佳(藻類去除率達99.996%)；(760~840) NTU則以pH7條件下以20(mg/L)PSI搭配2克改質磁性顆粒為最佳(藻類去除率達96.33%)。 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%).
