Restricted by raw materials and manufacturing technologies, conventional ultrafiltration membranes can only operate under low presure (<0.3 MPa). In contrast, reverse osmosis membranes require high-pressure operation (1.0 MPa) to separate pure water from inorganic salts. The conventional dual-membrane process runs under inconsistent water quality conditions and varying pressure levels, which requires complicated intermediate processing equipment. This remains a common technical bottleneck in the current water treatment industry

Conventional Dualmembrane Process

After pretreatment, raw water flows into the ultrafiltration system and reverse osmosis system with gradually increasing filtration accuracy. The ultrafiltration membrane removes insoluble substances, while the reverse osmosis membrane eliminates salts. Since the reverse osmosis membrane features an extremely thin and fragile membrane layer with poor pollution resistance and no backwashing tolerance, a durable and backwashable ultrafiltration membrane must be installed in the front for pollutant interception. This combination forms the conventional dual-membrane water treatment technology, which has been widely applied across industries.

High-pressure Dual-membrane Process

Since the conventional dual-membrane process has been adopted in water treatment systems for a long time, most technical personnel from design institutes, engineering companies and manufacturers are accustomed to the traditional process flow. Few have explored the feasibility of direct connection between ultrafiltration and reverse osmosis membranes.As an innovative technical project, the high-pressure direct-connected dual-membrane water treatment process realizes the direct connection of UF and RO membranes. Breaking through the traditional technical limitations, it effectively solves the inherent drawbacks of conventional dual-membrane technology by simplifying intermediate links.

30% Reduction in Construction Cost

With optimized pressure resistance and flux retention performance of carbon nanotube ultrafiltration membranes, the newly developed high-pressure ultrafiltration membrane cuts the traditional process flow by 50%, reducing the overall system construction cost by approximately 30%.

20% Reduction in Floor Area

The high-pressure dual-membrane technology greatly simplifies the traditional process flow, lowering the floor occupation of the dual-membrane system by 20%.

15% Reduction in Energy Consumption and Carbon Emissions

The optimized process reduces power consumption and equipment maintenance workload. Benefiting from the centralized self-maintenance workflow and decreased water consumption rate of the direct-connected dual-membrane structure, the carbon emission per ton of water is ultimately reduced by about 10%.