本文总结了加利福尼亚州奥克兰市东湾公用事业区（EBUD）为优化粘土聚合物混凝与直接在线过滤相结合处理低浊度水而进行的研究。在1982年和1983年期间，三个EBUD直接过滤厂长期使用阳离子聚合物作为主要混凝剂，添加和不添加粘土。本文比较了聚合物、粘土聚合物和明矾混凝的效果，并讨论了它们各自的优点。比较了三种混凝剂的化学成本、污泥产量和反冲洗水的使用情况。讨论了聚合物使用的其他方面，包括质量控制、年龄效应、氯需求、三卤甲烷形成和聚合物残留物。包括4个参考文献、表格和图表。

This article summarizes the research conducted by the East Bay Utility District (EBUD), Oakland, California, to optimize clay-polymer coagulation used in conjunction with direct, in-line filtration to treat low-turbidity waters. During 1982 and 1983, cationic polymers were used as the primary coagulants, with and without clay, for extended periods at three EBUD direct filtration plants. This article compares the effectiveness of polymer, clay-polymer, and alum coagulation and discusses advantages of each. Chemical costs, sludge production, and use of backwash water were compared for the three types of coagulants. Other aspects of polymer use including quality control, effect of age, chlorine demand, trihalomethane formation, and polymer residuals are discussed. Includes 4 references, tables, figures.