| 摘要 |
A method and apparatus for filtering/concentrating a raw liquid such as industrial waste water or suspension of various kinds. Such raw liquid is additionally dispersed with grains in advance before being subjected to a cross flow filtration in which a tubular filtering member is used. The raw liquid is supplied through the tubular member under pressure. Since the tubular filtering member is provided with a guide member which guides the supplied raw liquid spirally therealong, suspended matter or suspended particles will not stay on the filtering surface. The size of the grains is less than one third the diameter of the tubular member in case where said grains have a specific gravity larger than the raw liquid. If the grains have a specific gravity smaller than the raw liquid, the grain size may vary from one tenth to nine tenths the tubular filtering member. |
