混凝与浑浊度分类测定

Coagulation and Classification of Turbidity

混凝的主要作用是提高沉淀效率，借以延长滤池洗砂周期；同时，在降低浑浊度上起了作用．致浊粒子的粗细范围很广，且性质不同．所用处理方法去除不同致浊粒子的效果不同，浑浊度宜分类测定．建议分为自混浊度、混凝浊度、可滤浊度、聚沉浊度，并提出了测定方法草案，供进一步研究．

The main function of coagulation is to promote the sedimentation efficiency so as to prolong the washing cycle of rapid sand filter and in the meantime the turbidity of raw water is greatly reduced. Sizes of suspended particles which form turbidity cover a wide range and their properties are diverse too. The treatment efficiencies of processes about the removal of different suspended particles are different. In the study of treatment processes of turbidity removal of raw water, it may be better to classify the turbidity into different classes. It is suggested that the turbidity of raw water may be classified into settleable turbidity, coagulatod-settleable turbidity, unfilterable turbidity and coagulable turbidity. And a draft of their determination methods is proposed for further studies.