【摘要】 以不锈钢丝网作为支撑材料、硅藻土作为预涂材料制备动态膜,考察其对污染物的去除效果以及运行过程中动态膜的跨膜压差及通量的变化规律。中试在广东省肇庆市某自来水厂(以北江为水源)进行,硅藻土预涂动态膜工艺对原水和沉淀池出水中浊度的去除效果良好,出水浊度皆在1 NTU以下,去除率达到95%左右。动态膜对有机物也有一定的去除效果,当处理原水时对CODMn的去除率为45.7%,处理沉后水时去除率为11.6%。运行过程中膜通量基本保持不变,说明膜污染较轻。更多还原

【Abstract】 The diatomite dynamic membrane was prepared using stainless steel mesh as support material and diatomite as precoated material.Pollutant removal,trans-membrane pressure and flux of the membrane in the treatment of Beijiang source water and settled water were investigated.The pilot testing results indicated that turbidity was reduced to <1 NTU(removal efficiency of about 95%).The removal efficiencies of organics by the dynamic membrane were 45.7% and 11.6% respectively for raw water and settled water.During the experiment,fouling of the dynamic membrane was minimal,and the membrane flux was essentially constant.更多还原