高浓度制药含磷废水处理技术研究

以某制药厂生化车间超滤透出液为研究对象,通过小试试验考察了不同絮凝剂(三氯化铁、氧化钙、聚合氯化铝及氢氧化钙)对污水中磷的去除效果,并重点对氢氧化钙与聚合氯化铝三级混凝除磷的效果进行了探讨研究,试验结果表明Ca(OH)2与PAC复配三级混凝除磷的最佳投药量为在pH为9时,一级混凝沉淀除磷Ca(OH)2最佳投加量为1.66 g.L-1;在pH为9时,二级混凝沉淀除磷Ca(OH)2最佳投加量为0.2 g.L-1;在pH为7时,三级混凝沉淀除磷PAC最佳投加量为180 mg.L-1,最终出水总磷浓度为0.25 mg.L-1左右,总磷去除率达到99.94%以上。

Treatment Technology of High-concentration Pharmaceutical Waste Water Containing Phosphorus

Adopting ultrafiltration in biochemical shop of a pharmaceutical factory workshop as the researching object,through the laboratory test,the paper discusses the effect of various flocculant(ferric chloride,calcium oxide,chloride and calcium hydroxide)on phosphorus removal in sewage.The effect of calcium hydroxide and PAC three stage coagulation on phosphorus removal is discussed.The experimental results show that the optimal dose of phosphorus removal through 3-level coagulation of Ca(OH)2 and PAC is:when pH=9,best dosage of 1-level coagulation sedimentation phosphorus removal of Ca(OH)2 is 1.66 g.L-1;when pH=9,best dosage of 2-level coagulation sedimentation phosphorus removal Ca(OH)2is 0.2 g.L-1;when pH=7,best dosage of 3-level coagulation sedimentation phosphorus removal PAC is 180 mg.L-1;the ultimate total phosphorus concentration is 0.25 mg.L-1,the total phosphorus removal rate reaches over 99.94%。