Study on improvement in water quality of landscape of reclaimed water by enhanced coagulation with potassium permanganate composite
高锰酸盐复合药剂强化混凝改善再生水景观湖水质研究

Coagulation technics with flocculent aid enhanced the efficiency of algae removal in landscape of reclaimed water. A practice for improved coagulation is the use of potassium permanganate composite (PPC) as a flocculent aid and PAC as a coagulant. Comparing the effect of the PPC and PAC different dosages to treating the landscape water by jar-test, it was found that the optimal PPC and PAC dosages were 1 mg/L and 60 mg/L respectively by fed into simultaneously. The removal rate of TP, chlorophyll a, and algae density was 54%, 32.3% and 35.4%, respectively, which was treated by clarification with enhanced coagulation in pilot test. The TP and TN of landscape of reclaimed water decreased gradually, from 4.9 mg/L and 23 mg/L to 0.72 mg/L and 10.3 mg/L. Enhanced coagulation with PPC is great effective for controlling algae growth to improve the water quality of landscape.