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Company develops six brine concentration projects
Gradiant announced that it is currently developing six brine concentration projects in China, two of which are in final stages of negotiation. The company is working with Shanghai Electric, a Hong Kong and Shanghai listed enterprise and one of China’s largest mechanical and electrical equipment manufacturers, to secure the contracts.
The cooperation with Shanghai Electric follows an investment made by the Chinese manufacturer in Gradiant earlier this year. Prior to the investment, Shanghai Electric engineers fully vetted Gradiant’s award-winning Carrier Gas Extraction (CGE) process. The company’s CGE technology produces fresh water from high-TDS wastewater with significant cost advantages over traditional brine concentration or zero-liquid discharge (ZLD) technologies.
Gradiant is developing projects in China to treat power plant flue gas desulfurization (FGD) wastewaters and oilfield produced water with distillate capacities ranging from 500 to 36,000 m3/d [0.13 to 9.5 mgd]. Gradiant has deployed similar projects in the U.S. up to 2,000 m3/d.
“In addition to power equipment, Shanghai Electric has a sizable desalination business, as well as a strong understanding of water needs in China’s industrial sectors. They invested in Gradiant after determining the huge market potential of our desalination technologies in the region,” said Anurag Bajpayee, co-founder and CEO of Gradiant.
Developed at the Massachusetts Institute of Technology (MIT) by the company’s founders, Gradiant’s proprietary CGE technology uses air as a carrier gas operating in a closed loop to extract water from high-TDS wastewater. Water is separated from the impurities by using it to humidify the carrier gas stream. Purified water is then recovered from the gas in a subsequent dehumidification process, which employs a unique bubble column heat and mass exchanger.
Gradiant is working with Shanghai Electric on a non-exclusive basis, but maintains a shared goal of meeting China’s growing industrial water needs and will continue to jointly pursue projects in the region. For the immediate future, Gradiant will continue to manufacture CGE systems in the U.S., and as future projects are secured, Gradiant will work with Shanghai Electric and partners to determine if systems could be manufactured in China.