ro membrane cleaning L-UF250

Specifications and Product Details:

Character of wellblue UF membrane:

1. Good hydrophilicity

Through a special hydrophilic treatment, our UF membrane has permanent hydrophilic properties. Even at a lower trans-membrane pressure, it also can get high water flux.
With uniform pores, the hollow fiber UF membrane can remove the micro-organisms, colloids, algae and other turbidity substances. All the modules pass through air water inspection to ensure the fibers without broken or leaking.

2. Good mechanical strength

Through improving the formulation and process, our UF membrane products have good breaking strength and breaking elongation, to ensure no broken occurred in use.

3. Long service life

Using high quality improved PVC as raw materials, the hollow fiber UF membrane has good advantages of resistance to acid and alkali, organic solvent, grease and light aging. It also has good pollution resistance and strong endurance, it can be washed with various methods in order to remove contaminants and restore membrane flux.

4. Many field application

They are mainly used in water purifying, the treatment of pure water, prefilteration of RO system, recycling of municipal water and industrial waste water, separating of special solution and many other fields.

l Specification

Membrane Material	PVC	External Shape	Hollow fiber
Inner and outer diameters of hollow-fiber	0.9mm/1.6mm	Membrane fiber type	Inside-out hollow-fiber
Dimensions of membrane module	90 X 1190mm	Area of membrane module	3.8M2
Pure water flux	1000 L/H	Applicable temperature	5 – 45 centidegree
Molecular Weight Cut-off (MWCO)	100.000 Daltons
Characteristics of membrane structure	Hydrophilic double-compact layers

l Application Conditions

Pre - filtration	50-150 um
Max turbidity of inlet water	≤ 15 NTU
Running mode	Cross-flow filtration or dead end filtration
Max inlet water pressure	0.45 MPa
Max pressure difference of transmembrane	0.2 MPa
Applicable PH range	2- 12

Tolerable continuous residual chlorine	100 PPm
Tolerable interval residual chlorine	200 PPm

l Backwashing Design

Backwashing pressure	0.25 MPa
Backwashing frequency	Every 20 -60 minutes
Backwashing time	30-60 seconds every time
Frequency of chemically enhanced ( CEB )	Auto adding of additives in backwashing is recommended.
Time of chemically enhanced backwashing ( CEB )	30- 60 seconds every time

l Chemically washing design

Frequency of chemically washing	Every 1~4 months or when TMP is over 0.15 MPa
Pressure of chemically washing	0.15 MPa
Time of chemically washing	60 -minutes every time
Acid washing chemical	Citric acid or oxalic acid ( mixed into solution with PH = 2 )
Alkali washing chemical	NaOH ( mixed into solution with PH=2)

l Index of output water

Turbidity of output water	< 0.1 NTU
Index of silt density	< 1.5
Microorganism, pathogen	99.9 % Removed
Remarks:	1. Pure water flux is measured with pure water at the 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.