Residuals Management & Zero Liquid Discharge Using Ceramic Membrane De-Watering
Common methods of managing residuals in drinking water production vary widely and include thickening tanks, drying beds, screw presses, polymer, solids handling and other hardware. These methods are routinely high in labour, chemicals, complexity, footprint and have significant capital & operating costs. This paper will review the operational histories of an alternative dewatering process, based […]
Reverse Osmosis Membrane Compaction and Embossing at Ultra-High Pressure Operation
Herein, we evaluate the performance (i.e., flux and rejection) of commercially-available, thin film composite brackish water RO (BWRO), seawater RO (SWRO) and high-pressure RO (HPRO) membranes operating at pressures from 14 bar (200 psi) to 207 bar (3,000 psi). For each membrane material, we elucidate the impacts to performance using a porous metal frit and […]
Reverse Osmosis Membrane Compaction and Embossing at Ultra-High Pressure Operation
Herein, we evaluate the performance (i.e., flux and rejection) of commercially-available, thin film composite brackish water RO (BWRO), seawater RO (SWRO) and high-pressure RO (HPRO) membranes operating at pressures from 14 bar (200 psi) to 207 bar (3,000 psi). For each membrane material, we elucidate the impacts to performance using a porous metal frit and […]
Closed-Circuit High-Pressure Membrane Systems for the Separation of Per and Polyfluoroalkyl Substances
In this study, four commercially available membranes (NF270, NF90, CR100, and SW30) spanning the loose NF to tight RO separation ranges were investigated for their PFAS rejection performance. The specific focus was devoted to evaluating the removal of perfluoroalkyl acids (PFAAs) in a full-scale closed-circuit desalination (CCD) pilot module operating at 97% recovery. The results […]
Closed-Circuit High-Pressure Membrane Systems for the Separation of Per and Polyfluoroalkyl Substances
In this study, four commercially available membranes (NF270, NF90, CR100, and SW30) spanning the loose NF to tight RO separation ranges were investigated for their PFAS rejection performance. The specific focus was devoted to evaluating the removal of perfluoroalkyl acids (PFAAs) in a full-scale closed-circuit desalination (CCD) pilot module operating at 97% recovery. The results […]
Longer Term Impact of Desalinated Water on Blended Supplies
Lifecycle Cost Analysis of Photobioreactor Followed by Secondary RO for Enhanced Water Recovery in Brackish Water Desalination
Population growth and prolonged and frequent drought events call for an urgent need for alternative sources of water. The use of unconventional water resources such as brackish water and reclaimed water has become a viable option because of the recent advances in reverse osmosis (RO) technologies. As of March 2021, there are more than 1,200 […]
Lifecycle Cost Analysis of Photobioreactor Followed by Secondary RO for Enhanced Water Recovery in Brackish Water Desalination
Population growth and prolonged and frequent drought events call for an urgent need for alternative sources of water. The use of unconventional water resources such as brackish water and reclaimed water has become a viable option because of the recent advances in reverse osmosis (RO) technologies. As of March 2021, there are more than 1,200 […]
A Plethora of Seawater Intakes Which Will Be Selected?
The Claude “Bud” Lewis Carlsbad Desalination Plant (CDP), pictured in Figure 1, has been operating for nearly 3 years, producing approximately 50= million gallons per day (MGD) to meet 10 percent of the City of San Diego’s daily potable water demands. The plant has been operating under a temporary State Water Quality Control Board (Water […]
The Evolution of High Recovery Reverse Osmosis to Achieve 95%+ Recovery
Increasing regulatory requirements and disposal costs around the world, as well as ESG mandates and incentives for recycling, are prompting industries to reduce their water and energy footprint, and highlight a growing need for innovation in reverse osmosis (RO) technology. Historically, it was challenging for conventional RO technologies to achieve recovery rates greater than 75% […]
