摘要
悬浮颗粒的絮凝过程对直接过滤的去除效率有影响,絮凝时间是控制絮粒形成大小及特性的主要因素之一。为提高直接过滤去除低温低浊微污染水中污染物的效率,考察了不同絮凝时间对去除效果的影响。结果表明,直接过滤处理低温低浊微污染水时,设置絮凝池的出水效果较优;絮凝时间大于10 min时,所形成的絮体更密实,Zeta电位趋于0,有利于悬浮颗粒吸附在滤料上,特别是对一些芳香族有机物及带双键的有机物,当絮凝时间为14 min时,去除率可达35%。
The flocculation process of suspended particles had influence on the removal efficiencies of direct filtration, and the flocculation time was one of the main factors controlling the size and characteristics of flocs. In order to improve the efficiency of direct filtration on removal of organic pollutants in low temperature and low turbidity micro-polluted water, the influence of different flocculation time on removal efficiency was investigated. The results showed that the outflow of the process with a coagulation tank was better than that without the tank. The flocs were more close-grained and the Zeta potential was more tending to zero when the floeeulation time was longer than 10 rain. There were more advantageous for the flocs to be adsorbed on the filter media, especially for some aromatic organic matters and duplet bond organic matters. The removal rate could reach 35% when the flocculation time was 14 min.
出处
《供水技术》
2014年第2期1-4,共4页
Water Technology
基金
住房与城乡建设部研究开发项目(2012-K7-20)
关键词
微污染水
低温低浊
絮凝时间
直接过滤
micro-polluted water
low temperature and low turbidity
flocculation time
direct filtration
