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自吸式发酵罐
AAF型自吸式发酵罐分为两种类型，一类是AAF-I型，该型设备完全自吸空气，给微生物发酵过程供氧;另一类是AAF-II型，该型自吸式发酵罐需要外配鼓风机供气，上图为AAF-II-200型自吸式发酵罐。
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AAF-S型自吸式发酵罐，该型设备完全自吸空气，给微生物发酵过程供氧。AAF型自吸式发酵罐主要功能部件为置于罐底部的气液混合强化器，它由多棱形空心叶轮和围绕叶轮的定子组成。叶轮旋转后产生负压，自动吸入空气，在混合腔内与发酵液充分混合，气体被分散成细小气泡(直径约200μm)，形成巨大的气液传质界面，发酵罐内体积传质系数KLa得到很大提高，同时气液混合流以射流方式分散到发酵液主体中，在发酵罐内部形成强湍流，造成了完美的供氧[供氧速率OTR高达3.5~7.0(kg·M3·hr-1)]。
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