Ready for Transfer

Chlorine Resistant Polyamide Desalination Membranes


Agency: U.S. Bureau of Reclamation (USBR)

Technology: Chlorine-Resistant Membranes, a new polyamide (PA) membrane chemical formulation that can reduce water treatment costs.

Overview: Reverse osmosis (RO) polyamide membranes are used to desalinate and purify seawater, wastewater, and surface water. Chlorine is used in the reverse osmosis process to prevent biofouling of the membrane, but chlorine rapidly degrades polyamide membranes. A high-performance membrane that is resistant to chlorine degradation has long been sought by the desalination industry to simplify and lower the cost of operating desalting plants. This new chemical formation has the potential to be that solution because it is resistant to chlorine degradation.

Benefits: The technology could revolutionize the industry by increasing the life of membranes and reducing replacement costs for desalting plants. Existing RO treatment facilities could replace damaged membranes with chlorine-resistant PA membranes that would significantly lower operating costs. New facilities using chlorine-resistant PA membranes would benefit from reduced capital and operation costs. All current users of RO treated water and other applications, including microfiltration, ultrafiltration and nanofiltration, could benefit.

Opportunity: Available for licensing.

Contacts: Yuliana Porras, Principal Investigator; Samantha Zhang, Technology Transfer Coordinator

For more information, view the USBR fact sheet on the technology.