High recovery Reverse osmosis (RO) membrane desalination of inland brackish water sources has been pursued in various regions of the world as a potential approach to generating new water supplies. However, high recovery membrane desalination is often limited by membrane mineral scaling of sparingly soluble mineral salts. Membrane mineral scaling si...

A new RO rapid desalting evaluation system is used to demonstrate performance of RO membranes for treatment of inland water. A unique mini module system combined with an external scale monitor allows for rapid detection of scale formation. The pretreatment scheme was then adjusted to optimize antiscalant dosage and RO performace was measured. This ...

The OCWD has approved the final expansion project of the Groundwater Replenishment System to produce 130 million gallons per day of purified water. This final expansion will bring the GWRS facility to its built-out capacity, however with challenges, including a new wastewater source, different water quality, and membrane pilot study data to evaluat...

Advanced treatment trains for potable reuse in California are required to demonstrate high log removal values (LRVs) for Giardia, Cryptosporidium, and enteric viruses. Reverse osmosis (RO) is a key treatment step that contributes to the total required LRV credits. The RO system at the Orange County Water District (OCWD) Groundwater Replenishment Sy...

Advanced treatment trains for potable reuse in California are required to demonstrate high log removal values (LRVs) for Giardia, Cryptosporidium, and enteric viruses. Reverse osmosis (RO) is a key treatment step that contributes to the total required LRV credits. The RO system at the Orange County Water District (OCWD) Groundwater Replenishment Sy...