更多情况下,进料(悬浮液)需要进行预处理,以便加快过滤速度。预处理方式包括加热、重结晶或是加入过滤助剂如纤维素或硅藻土。

Oten the feed is modified in some way by pretreatment to increase the fltration rate, as by heating, recrystalizing, or adding a “filter aid" such as cellulose or diatomaceous earth.