Nanophotonic-Enabled Solar Membrane Distillation (NESMD)
Photothermal nanoparticles are coated on a hydrophobic membrane. Sunlight reacts with the nanoparticles generating heat on the membrane’s surface. The heat evaporates the feed water generating clean water vapor that flows through the membrane, leaving the dirty feed water behind.
Localized Water’s NESMD technology has advanced past prototype feasibility and is now on a path to full commercialization within 12-24 months
Small- Scale Prototype
Second Generation Prototype
Max water output of the NESMD membrane is up to 15 liters / hour / m2 assuming 90% heat recovery scaling linearly, or 1/3 gallons per hour per square foot.
For perspective, NESMD could produce up to roughly 10,000 gpd of pure water using the surface area of a basketball court (4,700 sqft), assuming 6 hours of sunlight. Increased water production is possible through supplemental infra-red illumination during non-sunlight hours.
LWS is currently designing NESMD water purification systems that can modularly scale for expanding water needs for the following uses for which it has obtained exclusive rights: