弗里德利过滤厂是明尼苏达州明尼阿波利斯市的一家表面软化厂，其双介质和混合介质过滤器组受到流化和亚流化反冲洗速率的影响。作者描述了这些速率对水头损失、出水浊度和过滤器运行长度的影响。较低反洗率的经济优势包括节能、过滤器运行时间较短、清洗水箱、反洗储水箱、管道和相关泵送系统较小。包括15个参考文献、表格和图表。

Sets of dual and mixed media filters at the Fridley filter plant, a surface softening plant in Minneapolis, Minnesota, were subjected to fluidization and subfluidization backwashing rates. The author describes the effects of these rates on head loss, effluent turbidity, and length of filter run. Economic advantages of lower backwashing rates include energy savings, somewhat shorter filter runs, and smaller wash water tanks, backwash holding tanks, piping, and allied pumping systems. Includes 15 references, tables, figures.