BATCH AND SEMI-BATCH PRESSURE AND OSMOTICALLY DRIVEN SEPARATION PROCESSES

摘要

A method and device for continuous batch separation where batch reset time is eliminated is provided. Separation is achieved in passes employing more than one liquid container or chamber. First pass begins with batch feed solution from a source reservoir, the feed solution flows from the source reservoir, undergoes separation in the separation device and the retentate is returned to a receiving reservoir until the source reservoir is evacuated. On feed switch over sequence, all pass one solution present in the holdup volume of the system is replaced with pass two solution with minimal to no mixing between the two solutions. Separation continues during the switch over sequence. The batch continues with subsequent passes until desired separation or operating conditions are met. Feed solution for the next batch is filled and kept ready during separation of a batch. Similar feed switch over sequence is followed between batches.