检查颗粒计数仪器在市政饮用水设施中的作用。简要介绍了粒子计数器和浊度计的比较结构，说明了它们在设计和应用上的差异。本文介绍并讨论了美国各地中试和全尺寸过滤器的颗粒计数结果，包括颗粒计数与浊度的比较，以及通过选择混凝剂、聚合物剂量和流速进行优化。还介绍了使用颗粒计数、浊度和囊肿接种结果进行膜废水监测的比较。

The role of particle counting instrumentation is examined for use in the municipal drinking water facility. The comparative construction of the particle counter and turbidimeter are described briefly, showing their differences in design and application. Particle count results from both pilot and full scale filters from various sites across the United States are presented and discussed, including particle count comparison to turbidity and optimization by choice of coagulant, polymer dosage, and flow rate. Membrane effluent monitoring comparisons using particle counts, turbidity, and cyst seeding results are also presented.