⑦膜过滤法 When there is a small number of organisms in a large amount of liquid, the liquid is filtered through a membrane and then the membrane is placed on agar in a petri dish Membrane filter removed and placed in plate Water sample filtered Membrane filter through membrane appropniate Incubation on a fiiter support filter(0. 45 um) medium for 24 hours Figure 6.7 The Membrane Filtration Procedure⑦膜过滤法 When there is a small number of organisms in a large amount of liquid, the liquid is filtered through a membrane and then the membrane is placed on agar in a petri dish