高锰酸盐复合药剂强化混凝改善再生水景观湖水质研究

实验通过投加助凝剂以强化混凝沉淀过程,从而达到去除再生水景观水中的藻类。以PAC为混凝剂,高锰酸盐复合药剂(PPC)为预氧化助凝剂,通过烧杯实验确定PPC、PAC同时投加,最佳投量分别为1 mg/L、60 mg/L。生产性实验中,机械加速澄清池强化混凝对TP、叶绿素、藻密度的去除率分别为54%、32.3%和35.4%,湖水中TP、TN逐渐降低分别由4.9 mg/L、23 mg/L降至0.72 mg/L、10.3 mg/L。PPC提高了混凝沉淀对藻类的去除效果,改善了再生水景观湖水质,降低水中氮磷营养盐的含量。

Study on improvement in water quality of landscape of reclaimed water by enhanced coagulation with potassium permanganate composite

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.