Development of non-cellulosic RO systems for seawater desalting
Abstract
Sea water desalting through continued development and testing of the polyamide hydrazide (op-1) film membrane in a spiral configuration is described. Results of testing of polyamide hollow fiber permeators operating at 800 psi and desalting sea water in a single stage are also discussed. A process to continuously cast asymmetric DP-1 film membranes of up to 36 inches width was developed to supply membranes for fabrication of spiral module elements. Small spiral elements desalted sea water at expected flux and rejection levels and maintained stable performance in the field. Most larger elements lost salt rejection rapidly as a result of inadequate flatness of the membrane support (sailcloth) and of wrinkles in the spirally wound leaves.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- November 1975
- Bibcode:
- 1975STIN...7710385R
- Keywords:
-
- Desalinization;
- Osmosis;
- Pilot Plants;
- Sea Water;
- Cost Estimates;
- Membranes;
- Polyamide Resins;
- Tables (Data);
- Engineering (General)