Solar-powered water desalination is of technologies for removing salt from water. Through the special design of distillation unit, which is a technology that uses solar energy to heat the water to boiling, and cooling the steam back together to get pure water. Salt and other impurities are left in Distiller.
At present, all in water desalination plant in the world, less than 1% to use renewable energy. But it seems to WaterFx companies in Los Angeles, it won't take long, this situation may change completely. The company's Aqua4 "concentrated type solar stills" (CSS) using a cluster of concentrating solar collectors to heat to produce steam and extracts distilled water, its efficiency is 30 times of natural evaporation. It can produce 65 000 gallons a day of pure water, and beyond the sea, it will minimize a number of different sources.
From next year onwards, WaterFx will use a solar-powered water desalination technology to handle agricultural center in California--from experiencing drought "Central Valley" 1.6 billion gallons of water of high salinity and drainage. Crops absorb almost pure water from the soil, leaving a large number of potential toxicity of salt and minerals, such as selenium, a naturally occurring substance in the water. These extra minerals must be discharged from the soil, or else it will affect crop yields. By processing these waste WaterFx can make California a lot of arable land from the luck had to in order to store the water from returning. It also can stop the clean river water pollution in water row, or threatened wildlife. According to the statistics of the California water resources administration, about 9 493 miles of rivers and streams and 513 130 acres of lakes and reservoirs have been contaminated by agricultural irrigation and drainage.
"If we don't start now to eliminate salt, the future of California is being used by at least 10% of cultivated land had to ' retire '. And, in some cases, this figure can reach 30%, or even 40%, especially at those on the West side of the canyon where the salinity is high, "says Matthew Stuber WaterFX:" water discharge of sewage will speed up the natural surface water and ground water pollution, and eventually contaminate drinking water sources and the environment. Once the wastewater is discharged into the environment, it will cause severe damage to the natural ecology and wildlife. ”
Another large scale solar desalination project is currently in Saudi Arabia are built and scheduled for completion in 2017. Throughout the plant every day for Saudi Arabia aerhaifu-JI in the northeast was to provide 60 000 cubic metres of fresh water to ensure year-round stable water supply in arid areas. According to Abengoa introduced from Spain's renewable energy company built this innovative facility, the use of solar energy can significantly reduce operating costs. Currently Saudi Arabia Bai 50%~70%, national drinking water from seawater desalination, and desalination plant to burn 1.5 million barrels of oil a day. Saudi Arabia and neighboring countries, total demand for desalinated water is expected to be reached 110 million cubic metres per day in 2030.
Due to reasons such as climate change, fresh water in many countries all over the world have become very valuable, so now is the best time of solar-powered water desalination technology is mature. This emerging technology can quickly become mainstream, may determine the future of the world is to keep the peace, still to compete for increasingly scarce freshwater supplies are in the throes of conflict.