The measure would allow the Department of Budget and Finance to issue up to $100 million in special purpose revenue bonds to assist Trevi Systems Inc. and Kona Coast Water in bringing operational two or more plants to desalinate water using 100 percent renewable solar energy and supply it to customers on Hawaii Island, and potentially other islands as well.
Developed by a research team at MIT, the proprietary system incorporates what are described as “well-known and standard chemical processes.” These include a nano-filtration process to initially remove unwanted compounds from the brine, followed by one or more stages of electrodialysis.
Before the Carlsbad Desalination Plant in Southern California began operations in 2015, scientists at UC Santa Cruz recognized an important opportunity to study the effects of the high-salinity brine that would be discharged from the plant into coastal waters.
Starting in 2014, they collected measurements of water chemistry and biological indicators in the area so they could compare conditions before and after the plant began discharging brine into the ocean.
By using the best technology, sound management practices, public participation, and a balanced approach to human and environmental needs, Sweet-water Authority—known locally as the Authority—provides its customers clean, safe water from local water supplies.
The celebration also correlated with the third anniversary of the plant opening. The Carlsbad plant produces more than 50 million gallons of desalinated water each day and is the largest and most technologically advanced desalination plant in the U.S., according to the county.
After three strong years, the plant just produced its 40 billionth gallon of drinking water. That’s enough water to fill a billion bathtubs, or fill every floor of the empire state building, 145 times.