使用小规模中试装置进行直接砂滤试验以调查深床过滤机中被铝凝聚剂絮凝的高岭土颗粒的去除机理。通过从三个不同过滤机液位抽取的样水中颗粒粒径和 ζ—电位的测量表明过滤机内絮凝颗粒的除去由较大粒径和较好控制的 ζ电位颗粒开始。根据应用直接沙取样法所获得的对过滤时间 A small pilot plant was used for direct sand filtration testing to investigate the removal mechanism of kaolin particles flocculated by aluminum flocculants in a deep bed filter. Measurement of the particle size and the zeta potential in sample water drawn from three different filter levels showed that the removal of flocculated particles in the filter started with larger particle size and better controlled zeta potential particles. According to the application of direct sand sampling method to obtain the filter time