Osmotically Assisted Reverse Osmosis Configuration

Systems and methods for desalinating a liquid feed using a membrane-based fluid filtration system are disclosed herein. The desalination system of the present embodiments can include a first osmotically assisted reverse osmosis (OARO) unit in fluid communication with a second OARO unit for desalination and brine concentration of a liquid feed into the first OARO unit. The concentrate product from the first OARO unit can be split into a first stream and a second stream, with the first stream entering the concentrate side of the second OARO unit and the second stream entering the diluate side of the second OARO unit. Additionally, or alternatively, the diluate product of the second OARO unit can be further split between inlets of the first and second OARO units. In some embodiments, the OARO units can be in fluid communication with a reverse osmosis (RO) unit to receive a RO concentrate feed therethrough.