摘要：介绍了水中微颗粒能长期悬浮的原因，讨论了微颗粒混凝沉淀的影响因素及原理，并简单介绍了凝聚控制的几种方法。

关键词：微颗粒；悬浮；沉淀；凝聚

Abstract：The long 一 term suspension causes of particle in water were introduced. Theeffect factors and mechanism of condensing sediment of particle were discussed. And some kindsof control means of condensation were briefly introduced.

Keywords：particle ; suspension ; sediment ;condense