一定温度下的速率先增加后减少最后趋于平缓．这是由气相在吸收剂颗粒间的扩散和在产物层内的扩散引起的。
The gas diffusion through the inter-particle and the product layer was the mainly factor on the reaction rate.
膜表面形成的PAC层还可过滤微生物和胶体颗粒，减少了它们到达膜表面的数量。
At the same time, the PAC layer can also filter the microorganisms and colloids to cut down the amount land…
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