Brackish Water Reverse Osmosis (BWRO) desalination applications include treatment of saline and polluted surface and ground water. Because most BWRO applications are located far from the coast, and are therefore unable to discharge to the sea, it is essential to minimize the amount of brine produced.
Modern BWRO plants are designed with two to four stages, often utilizing inter-stage booster pumps or turbo-boosters, to achieve high recovery. In contrast, Desalitech's Closed Circuit DesalinationTM (CCDTM) products and systems can attain maximum permeate recovery in a single stage with no additional boosting equipment.
Desalitech offers complete, ultra-low energy, high recovery BWRO units that dramatically reduce energy consumption while providing unmatched operational flexibility to accommodate the wide variations in conditions that are typical for these water sources. Major advantages include:
ü Maximum Recovery - Any Desalitech unit can attain ultimate recovery in a single stage, thereby minimizing source water waste, pretreatment costs, brine disposal expenses and extra equipment costs. Recovery is limited only by the scaling characteristics of the specific source water. Desalitech BWRO plants have desalinated brackish water of 5,700 mg/L TDS salinity at up to 87% recovery, source with a TDS of 4,000 mg/L at over 90% recovery, and lower salinity sources at over 97% recovery.
ü Reduced Membrane Fouling and Scaling - The high cross-flow and brine salinity cycling inherent in the CCD process inhibit fouling and scaling, resulting in decreased maintenance procedures and expenses and enhanced system reliability.
ü Reduced Equipment Costs - As a result of needing fewer membrane elements and doing away with multiple stages and boosters systems, capital costs can be dramatically reduced.
ü Unmatched Operational Flexibility - Process flexibility is especially important for the variable salinity sources and variable operating conditions typically found in brackish desalination applications. Desalitech BWRO plants have operated continuously and automatically in situations characterized by intense seasonal variations.
ü Reduced Energy Consumption - Desalitech BWRO systems reduce energy consumption by 35% compared to modern conventional desalination systems.