高锰酸盐复合药剂强化混凝改善再生水景观湖水质研究

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

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。

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.