CHN Energy Ningxia Coal Group uses DuPont multi-tech solution to construct a minimum liquid discharge (MLD) solution to process their wastewater and achieve significant water recovery before thermal processing to achieve ZLD.
The compact and efficient system uses DuPont™ IntegraFlux™ ultrafiltration pre-treatment, FilmTec™ Fortilife™ nanofiltration salt separation, and FilmTec™ Fortilife™ reverse osmosis multi-stage salt concentration. The advanced membrane technology has allowed the system to maintain stable performance and it offers high tolerance to membrane fouling, which reduces cleaning requirements.
Since the system commenced trial operations in March 2019, the recovered clean water has consistently met the requirements for reuse, successfully reducing freshwater consumption. The by-products have all surpassed design requirements. This project has not only successfully addressed the water scarcity issue that this company is always facing, but it also minimized environmental impacts.
A New Chapter in Sustainability for the Paper Industry
DuPont Water Solutions multi-tech minimal liquid discharge (MLD) solution strongly supports the Chenming Shouguang paper & pulp wastewater reuse project with treatment capacity of 80,000 tons per day. The project represents the one of largest deployment of FilmTec™ Fortilife™ Reverse Osmosis and DuPont™ IntegraFlux™ ultrafiltration products in China.
With the large surface area of 77 m2 per UF module, a water yield of up to 4,000 t/d per train has been achieved. This advanced membrane product has resulted in a significant reduction of investment in pipes, instruments and other accessories.
With the advantage of higher water productivity, FilmTec™ Fortilife™ CR100 allows customers to increase the capacity of RO system while reducing their footprint and capital costs. The high salt rejection established a solid foundation for extending the lifetime of the membranes.