不同源水的过滤堵塞及臭氧预氧化控制效果研究

Clogging of Filter by Different Source Water and Control Effect of Preozonation

以低污染水质期的黄河水作为对比,研究了两种不同类型污染水质期源水(滦河水和黄河水)中的有机物和藻类对滤池堵塞的影响,以及臭氧预氧化的控制效果。研究显示,藻类对滤池堵塞有重要影响,滦河水以个体较大的蓝藻为主,黄河水以个体较小的绿藻为主,其中处理滦河水的滤池堵塞较为严重。两种微污染源水中,颗粒态有机物、溶解性有机物所占的比例不同。其中,黄河水的溶解性有机物含量高,造成气浮出水的大粒径颗粒比例增加,容易缩短滤池的运行周期;同时臭氧预氧化强化去除颗粒物的效果不明显,但能延长滤池的运行周期。滦河水中的"颗粒态"有机物所占比例较大,臭氧预氧化强化去除颗粒物的效果明显,但水头损失增长曲线表明,经臭氧预氧化后其过滤呈现出表层过滤的特性。

In comparison with Yellow River water in low pollution period, the impact of organic matter and algae in two types of source water from Luan River and Yellow River in pollution period on the filter clogging as well as the control effect of pre-ozonation were investigated. In the case of Luan River water, hearing dominantly blue-green algae, the filter is more severely clogged than that in the case of Yellow River water in which the dominant algae species are green algae. In the two types of water from different sources, the proportions of particulate and dissolved organic matter are different. For Yellow River water, the dissolved organic matter is at high level, so the particle size distribution after the air flo- tation treatment shifts to the large size ranges, thus shortening the operation cycle of the filter. The parti- cle removal is not improved significantly by the pre-ozonation, however the operation cycle of the filter is prolonged. For Luan River water, the proportion of particulate organic matter is relatively high, and the removal of particles is effective after the pre-ozonation. The head-loss development curve shows the characteristic of surface removal with the pre-ozonation in the case of Luan River water.