水处理SRUF-90个调值单位膜单元

UF membrane, UF membrane modules, Hollow-fiber membrane 1. UF membrane fairy --- SRUF-90 Membrane MaterialPVCExternal ShapeHollow fiberInner and outer diameters of hollow-fiber0.9mm/1.6mmMembrane fiber typeInside-out hollow-fiberDimensions of membrane module90X1135 mmArea of membrane module 5Pure water flux1200 L/HApplicable temperature5 - 45Molecular Weight Cut-off (MWCO) 100.000 DaltonsCharacteristics of membrane structureHydrophilic double-compact layers 2. Application Conditions Pre - filtration 50-150 umMax turbidity of inlet water ≤ 15 NTU Rated flux 60 160 L/M/H Running modeCross-flow filtration or dead end filtrationMax inlet water pressure 0.45 MPaPressure difference of transmembrane at 20 (TMP) 28 150 KPaMax pressure difference of transmembrane 0.2 MPaApplicable PH range 2 12Tolerable continuous residual chlorine 100 PPmTolerable interval residual chlorine 200 PPm 3. Backwashing Design Backwashing pressure 0.25 MPaBackwashing flow 220 300 L/M/HBackwashing frequency Every 20 -60 minutesBackwashing time 30 60 seconds every timeFrequency of chemically enhanced ( CEB )Auto adding of additives in backwashing is recommended.Time of chemically enhanced backwashing ( CEB ) 30 60 seconds every time 4. Chemically washing design Frequency of chemically washing Every 1 4 months or when TMP is over 0.15 MPaPressure of chemically washing 0.15 MPaFlow of chemically washing 200 250 L/M/HTime of chemically washing 60 90 minutes every timeAcid washing chemicalCitric acid or oxalic acid ( mixed into solution with PH = 2 )Alkali washing chemicalNaOH ( mixed into solution with PH=2) 5. Index of output water Turbidity of output water < 0.1 NTUIndex of silt density < 1.5Microorganism, pathogen 99.9 % Removed Remarks:1. Pure water flux is measured with pure water at 25 with inlet water pressure of 0.1MPa.2. If water are from surface water,river water or well water and so on,pre-treatment shall be done. It is suggested that a 50-150 um precision filter shall be equipped to have inlet water with turbidity ≤15NTU.