混凝土拌合站污水快速处理技术研究

Study on Technology of Rapid Treatment of Sewage in Concrete Mixing Station

隧道拌合站沉淀池无法有效沉淀污水中细小固体颗粒,属于富含钙离子的强碱性污水。实验采用细粒高岭土模拟污水,选用阴离子型聚丙烯酰胺对污水进行絮凝处理。利用水中钙离子作为反离子降低固体颗粒ζ电位,从而降低颗粒间静电斥力使得聚丙烯酰胺架桥吸附作用效果提升。实验研究了聚丙烯酰胺分子量、投药量、搅拌速度、搅拌时间和pH对絮凝效果的影响。还根据实验所得最佳絮凝参数对现场污水进行实验,絮凝处理效果理想。

The tunnel mixing station is equipped with a sedimentation tank,but it cannot effectively settle the fine solid particles in the sewage,which belongs to the strong alkaline sewage rich in calcium ions.The fine kaolin simulation wastewaterwas tested,anionic polyacrylamide flocculation of sewage treatment and utilization of calcium ion in water were choseas counterionto reduce solid particle zeta potential,thus reduce the electrostatic repulsion between particles,so the effect of polyacrylamide bridging adsorption was improved.The influence of molecular weight,dosage,stirring speed,stirring time and pH of polyacrylamide on the flocculation effect was studied experimentally.The flocculation treatment effect was ideal.