摘要：

从絮体的分形结构、粒度、有效密度等微观特性出发,研究预臭氧氧化对聚硅酸铝铁絮凝效果和絮体形态的影响。结果表明,臭氧具有良好的助凝作用,并存在臭氧最佳投加量。一定浓度的臭氧能增大混凝过程中絮体的粒径,改变絮体的形态,使其更加规整,从而使分形维数发生变化。同时,适当的预臭氧氧化能增大絮体的有效密度,使絮体更加密实,提高沉降性能。

关键词: 预臭氧氧化, 聚硅酸铝铁, 絮体

Abstract:

The effect of preozonation on flocculation capacity and floc morphology of polyaluminum ferric silicate has been studied，with the emphasis on the micro-characteristics，such as fractal structure，granule size，effective density，etc. of the floc. The results show that ozone has very good coagulant capacity，having optimal dosing quantity. A certain concentration of ozone can increase the granule size of floc in the process of flocculation，change the floc morphology，making it more standarized，so as to make the fractal dimension change. At the same time，the appropriate preozonation can increase the effective density of the floc，making the floc more dense and improving its sedimentation capacity.

Key words: preozonation, polyaluminum ferric silicate, floc

中图分类号: 

• X703.1