碳供应商可以在安装GAC之前检查工厂，进行床层测量，并建议最佳筛孔尺寸的碳和最佳清洗率。此处描述的方法由一家供应商开发，用于在快速重力过滤器中安装GAC之前预测是否会发生床层损失。它的应用可以使处理厂利用GAC高效运行。还包括压力柱、双介质过滤、冲洗速度过快、干舷不足、截留空气和反洗。包括表格、数字。

Carbon suppliers can examine a plant prior to GAC installation, make bed measurements, and suggest the best mesh size carbon and the optimum wash rate. The method described here was developed by one supplier for predicting prior to the installation of GAC in rapid gravity filters whether bed losses will occur. Its application can enable treatment plants to operate efficiently using GAC. Also covered are pressure columns, dual media filtration, excessive wash rates, insufficient freeboard, entrapped air, and backwashing. Includes tables, figures.