The filtration mechanism of PVA17-88 crosslinked is that the formation of a fine film between filtrate medium and cake can prevent loss of water in slurry into formation.
加入交联剂的PVA17 - 88降失水剂的降滤失机理是：在过滤介质与滤饼之间形成一层致密的薄膜，阻止了水泥浆中的水向地层流失。
The advances of production process are mainly applications of two stage filtration, full filtrate circulation, filter aids, membrane solvent recovery, dewaxing at room temperature, etc.
工艺进展主要是两段过滤、全滤液循环、助滤剂应用、渗透膜溶剂回收、室温脱蜡等。
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.
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。
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