直接过滤是指原水不经沉淀而直接进入滤池过滤。直接过滤充分体现了滤层中特别是深层滤料中的接触絮凝的作用。
· 高梯度磁过滤（high gradient magnetic filter) · 粒状层过滤 （ granular bed filter ) · 直接过滤(direct filter) ..
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为什么不直接过滤溶液而不稀释它？
Why not just filter the solution directly, without diluting it?
接触絮凝的概念源于直接过滤，是指介质存在时的絮凝作用。
The concept of contact flocculation was originated from direct filtration, which refers to flocculation among suspended particles in the presence of contact media.
采用轻质滤料滤池和砂滤池组成的直接过滤系统就能够克服这些不足。
The application of light media filterer can overcomes these shortcomings, especially when direct filtration process is used in treatment plants.
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