由于本实用新型的多孔支撑装置开孔率很大，可大大减小过滤水头损失。
As a porous support device has larger opening percentage, the filtering head loss can be greatly reduced.
该投加点面临的主要问题是活性炭穿透滤料层以及水头损失过快增长导致滤池过滤周期的大幅度缩短。
The major problems in this technology are PAC penetrating filter material layer and the great shorten of the filter cycle owing to the growth rate of filter head loss is so quickly.
比较了砂滤和纤维球过滤对浊度、COD、SS和油的去除情况，及其在水头损失、过滤周期和产水量等方面的异同。
The sand filtration is compared with fibre-ball filtration on the removal rate of turbidity, COD and SS, and on the head losses, filtration period and filtrate.
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