| 摘要 |
A filtration, mass exchange or heat exchange apparatus comprises a tank (2) having an inlet and an outlet and a mass of buoyant or floatable members (1, 1A, 10) in the tank. Means are provided for passing fluid through the tank and the buoyant or floatable members (1) serve as a filter and/or a contact surface for heat or mass transfer for two or more fluids. The buoyant or flexible members preferably take the form of wooden pebbles. A process for filtration and/or mass or heat exchange utilises the apparatus. Many different shapes of member are disclosed. <IMAGE>
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