Field Test Evaluation Research and Development and Operation and Maintenance of Reverse Osmosis Systems and Electrodialysis Pilot Plants at Roswell Test Facility

摘要

The primary objective of this work is to provide field evaluation testing of the reverse osmosis (RO) and electrodialysis (ED) pilot plants at the Roswell test facility (RTF). This report describes the blend systems, pretreatment systems, and pilot plants, and provides detailed information and test data on the performance of the pretreatment systems and pilot plants. Results of on-going research and development work on microbiological determination and control and details of the mechanical maintenance program are included. Four separate pretreatment and blend systems (a chlorinated and a non-chlorinated feedwater blend system, and two simulated feedwaters) were assessed at the RTF during the past year. In addition, activities were conducted in the operation and maintenance of 14 specific tests concerning RO systems, subsystems, test loops, and the ED reversal pilot plant. These tests included: long-term high-recovery performance evaluation with one RO stage using softened RO brine feedwater and use of concentrated brines for softener regeneration; independent evaluation of membrane performance using a simulated feedwater; evaluation of feedwater containing about 3000 ppm total dissolved solids with/without iodine; tests with/without chlorine; and tests on bacteriological effects. Detailed chemical and physical analysis results on the feedwaters and products are provided.