Nanofiltrationsmembran

BDX4040N and BDX8040Nseries of spiral nano filtration membrane adopted polyamide.They have moderate desalination rate and has relatively high desalination rate to remove macromolecule, multiple valence ion and especially noxious TOC substances in water, such as pesticide, weed-killer and THM predecessor. BDX4040N and BDX8040N seriesare excellent in the water softening and organism removal. They areapplicable to drinking water, municipal engineering and etc. The trades to which Nano filtration membrane technique is suitable: (1) Removal of two valet ion and organics by softening. (2) Recovery of dyeing. (3) Separation and refinement of oligosaccharide, concentration of high strong fruit juice. (4) Separation of peptide and amino acid ,concentration and purification of antibiotics. (5) Concentration of milk and whey protein. (6) Comprehensive utilization of agricultural products. ModelBDX4040N-40BDX4040N-70BDX4040N-90BDX8040N-40BDX8040N-70BDX8040N-90Capability Average Salt Rejection%NaCl35-4565-7585-9535-4565-7585-95MgSO4≥88≥95≥97≥88≥95≥97Permeate Flowgpd(m3/d)2220(8.4)2100(8.0)1900(7.2) 9500(36.0)10000(38.0)8454(32.0)Error±15%Active Membrane Areaft2(m2)80(7.5)385(36.0) Testing Conditions Standard Solution500 ppm NaCl 500 ppm MgSO4Operating Pressurepsi(Mpa)100(0.68)150(1.0)225(1.55)100(0.68)150 (1.0)225(1.55)Recovery Rate of Single Membrane Element15%Temperature25PH Value of Solution7-8Test TimeRun for 30 minutesLimiting ConditionsMax. Feed water Temperature45Max. Operating Pressurepsi(MPa)600(4.12)Max. Feed water Flowgpm(m3/h)16(3.6)75(17.0)Max. SDI of Feed water5Max. NTU of Feed water1Concentration of Free Chlorineppm< 0.1PH Value Range of Feed water as Continuous Operation2-11PH Value Range of Feed water as Chemical Cleaning1-12Max. Pressure Difference of Single Membrane Elementpsi(MPa)13(0.09)The minimal proportion of single membrane element's conc. press to perm. flow 5 : 1