Global Water Intelligence (GWI) has named Oasys Water and its partner Beijing Woteer as one of four finalists for “Industrial Water Project of the Year” at the 2016 Global Water Awards.
Oasys and Woteer jointly delivered China’s first membrane-based zero liquid discharge (ZLD) system for transforming challenging flue gas desulfurization (FGD) power plant wastewater. The Changxing Power Plant Project also serves as a reference point for other power producers as water and environmental regulations rise around the globe.
Changxing Power Plant Facility, China – an F/O breakthrough
Oasys Water is transforming high salinity wastewater at the Changxing Power Plant.
Due to new regulations on environmental control, power plant wastewater streams in China are now required to reach strict ZLD standards. Oasys Water and its Chinese partner were selected to deliver the world’s first commercial application of Forward Osmosis (FO)-based ZLD at the state-of-the-art Changxing coal-fired power plant. Oasys provided its ClearFlo MBC system and pre-concentrating reverse osmosis (RO), while Beijing Woteer supplied physic-chemical filtration, ClearFlo Complete ion exchange pretreatment, and a crystallizer package. The project offers complete treatment for complex FGD effluent at Huaneng Group’s Changxing Power Plant.
- Feed Water: The feed water at Changxing is a complex combination waste stream that includes flue gas desulfurization (FGD) blowdown wastewater and cooling tower blowdown (CTBD).
- Results: Oasys Water’s patented technology is now transforming 630 m3/day of complex FGD wastewater at the Changxing Power Plant, reducing both the intake of local surface water and the outflow of industrial wastewater. This project has allowed Oasys to introduce an innovative FO-based brine concentration and water reuse process to treat desulfurization wastewater.
- Economics: The draw solution recovery at Changxing was designed to use steam as the energy source, thus reducing overall energy requirements and overall cost. The Changxing system’s typical energy requirement is 90 kWht per m3 of processed wastewater.
Not only is this project transforming challenging industrial waste and reducing the need for fresh intake water within the plant, it also serves as an example of membrane-based ZLD technology to power producers and other industrial customers around the world.