处理工艺
当原液通过分离膜时，水透过分离膜，原液返回到原液槽。再一次通过分离膜，又有新的水透过分离膜，这样连续循环，直到原液槽的水位低于目标水位，处理结束。一般能够浓缩到原液的1/10~1/20。

Treatment process
When the original liquid passes through the separating film, the water passes through and the original liquid returns to the tank. Once again there is new water through the separation film , the cycle circulates until the water level of the tank is lower than the target level.