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Conducting NSF NO3/NO2 RO performance tests on Coway 8-Inch S-Type 3 membranes under varying test conditions including influent challenge concentrations, pressure, pH, temperature, and recovery rate. Pre-RO testing involves TDS reduction rate assessment. Results summary includes reduction rates for Sodium Nitrate and Sodium Nitrite in influent challenge water makeup. Detailed data analysis provided.
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NSF NO3/NO2 RO Performance TEST • [Test Condition] • - RO membrane : Coway 8 Inch S Type 3 set at each Condition • Influent challenge conc(mg/L) : 120 & 300 as Total Nitrogen • Pressure : 50 PSI & 100 PSI • Sampling Time : 4 hrs & 8 hrs • Recovery rate : 50 % • pH_: 7.2 ~ 7.3, Temperature : (20 ± 5) ℃ • Pre RO TEST : TDS reduction rate > 88 % (by Tap water) [Influent challenge water Make-up] - Standard : RO + Sodium Nitrate(NaNO3) & + Sodium Nitrite(NaNO2) by 1 ton Tank [Result Summary : Reduction rate(%)]