应用加载磁混凝处理微污染河水

实验对比考察了常规混凝和加载磁混凝工艺对微污染河水中COD、浊度和TP等污染物的去除效果，系统研究了混凝剂用量、磁种加载量、搅拌条件和药剂投加顺序等因素对加载磁混凝效果的影响。实验结果表明，加载磁种后沉淀颗粒的体积平均粒径为从常规混凝工艺的50.1 μm显著增加到68.6 μm；污染物去除效果明显优于常规混凝工艺，尤其对浊度和总磷的去除效果得到了显著的提升；在实验最优条件下COD、浊度和TP的去除率分别达到54.17%、99.28%和75.82%；并且加载磁种后可减少50%以上的混凝剂投加量，同时大大缩短沉淀时间。

Application of magnetic coagulation process for slightly polluted river water treatment

The removals of COD,turbidity and TP for slightly polluted river water were investigated comparatively by the conventional coagulation process and magnetic coagulation process.The influence of different factors such as coagulant dosage,magnetic seed dosage,stirring conditions,dosing sequence of materials was also systematically studied.After loading magnetic seed in conventional coagulation process,the volume average particle diameter significantly increased from 50.1 μm to 68.6 μm.The results indicated that the effect of magnetic coagulation process was better than that of conventional coagulation process.With the addition of magnetic seed,the removals of turbidity and TP was significantly improved,and the removals of COD,turbidity and TP were high up to 54.17%,99.28% and 75.82%,respectively under the optimum conditions.Simultaneously,the coagulant dosage was reduced by 50%,while the period of solid-liquid separation was shortened significantly.