Unbalanced Method For High Recovery (UMHR)

There are new kinds of flow schemes that can reduce the cost of higher recovery seawater and brackish water systems. Under normal operating conditions, there is minimal mixing from the concentrate to the feed flow streams. This concept involves decreasing the low pressure system feed flow while maintaining the high pressure concentrate flow through the pressure exchanger (PX). The result is an increased system recovery while the membranes operate at a lower recovery, but at the expense of a higher feed water salinity due to concentrate flow recirculating through the PX.