Based on the same number of transfer units, the mass transfer rate in the counter-current flow arrangement is the largest, and the enhancement of mass transfer by means of the ultrafiltration flux in the co-current flow system is the highest.

• 在相同之传送单元数下，以逆流流动方式者之质传速率为最大，而超过滤速对质传速率之提升则以顺流流动方式者中最为明显。