The invention relates to a fluidized bed apparatus 100. Said fluidized bed apparatus 100 comprises one or more modules 110 for treating materials and an optional air/gas treatment unit 130, each module 110 for treating materials containing 1 - 32, preferably 1 - 16 and particularly preferably 2 - 4 fluidizing units 120 operating independently and each fluidizing unit 120 comprising an integrated or exchange­able fluidizing chamber 50, a means 10 for controlling and measuring the air/gas flow, said means being an electronic hot wire sensor device or a device based on a static pressure difference, and optionally a heating/cooling means 51 for the air/gas. Further, the invention relates to a method for processing material in a fluidized bed apparatus 100. In said fluidized bed apparatus 100, one or several unit operations are carried out simultaneously, the materials in each of the fluidizing chambers being identical or different, and the amounts thereof in each of the fluidizing chambers be­ing equal or different.
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