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通过混凝试验去除饮用水中的磷,对单独投加混凝剂和混凝剂复配除磷效果进行了研究,确定了混凝剂复配时的最佳投加方式,投加比例和投加时间。单独投加混凝剂时FeCl_3投量为15 mg/L时,能够满足饮用水的生物稳定的限制范围要求,但存在出水色度的问题,采用FeCl_3与PAC复配可以减少出水色度同时减少混凝剂用量。复配总的投加量为10 mg/L,PAC紧随FeCl_3投加,FeCl_3与PAC投加比例为3:1,先投加FeCl_3再投加PAC时除磷效果最佳,出水满足饮用水的生物稳定的限制范围要求。FeCl_3与PAC复配除磷效果较好,可减少单一投加FeCl_3的用量,同时减少出水色度,适合饮用水除磷。
By means of coagulation test to remove phosphorus in drinking water, the effects of single dosage of coagulant and coagulant on phosphorus removal were studied, and the best dosage method, dosage ratio and Add time. When the dosage of FeCl_3 was 15 mg / L, the biostability of drinking water could be satisfied with the dosage of FeCl_3 alone, but there was a problem of chroma of water. The combination of FeCl_3 with PAC could reduce the chroma of water and decrease Coagulant dosage. The total dosage of compounding was 10 mg / L, PAC followed FeCl_3 addition, the ratio of FeCl_3 to PAC was 3: 1, the first addition of FeCl_3 and then the addition of PAC gave the best phosphorus removal effect, and the effluent met the drinking water Biologically stable limits the scope of the requirement. FeCl_3 and PAC compound phosphorus removal effect is better, can reduce the dosage of a single FeC_3 addition, while reducing the water color, suitable for drinking water phosphorus removal.