Lab - used ceramic membranes have filtration pore sizes ranging from 1KD to 1200nm, with excellent acid and alkali resistance (pH 0–14) and high temperature resistance. They are often installed in pilot - scale experimental devices for treating various difficult - to - filter feed liquids, such as removing mycelia and soluble proteins from fermentation broths. They are also applicable for separating precious metal catalysts from mother liquors in fine chemical experiments, as well as purifying active ingredients from animal and plant extracts and desalting and concentrating feed liquids. The online cross - flow cleaning design ensures stable flux during experiments.