本幻灯片概述了犹他州中部水利区关于废过滤器反冲洗处理的项目。概述的主题包括: 技术和经验； 水力效应； 使用适当的化学品；还有，用粒子计数来衡量成功与否 和浊度计。包括数字。

This slide presentation outlines a project by the Central Utah Water Conservancy District on Spent Filter Backwash Treatment. Topics outlined include: techniques and experience; hydraulic effects; applying proper chemicals; and, measuring success with particle counts and turbidimeters. Includes figures.