Saehan RE8040-BLF Saltwater Reverse Osmosis Membrane (11500 GPD)

Low pressure membranes for low TDS water filtration. 1 GPD = 3.78543 liters/day

Characteristics:

• Productivity: 43.5 m3/day.

• Selectivity: 99.2%.

• Filter surface area: 37.2 m2.

1. Bench tests were carried out for 30 minutes. under the following conditions: 500 mg/l NaCl solution, pressure-0.7 MPa, permeate content-15%, water temperature 25 C and pH 6.5-7.0.
2. Minimum selectivity 99.0%.
3. Performance is individual for each membrane, however, it will differ by no more than 10% from the indicated one.
4. The area of the filtering surface can vary within 3%.
5. All items are stored in vacuum plastic packaging with 1% soda bisulfite solution and packed in cardboard boxes.

Description:

• Membrane type: Thin film composite.

• Membrane material: PA (Polyamide).

• Membrane surface charge: Negative.

• Construction: Roll membrane with FRP sheath (fiberglass).

Dimensions:

• Length: 1016 mm.

• Outer diameter: 203 mm.

• Outlet tube diameter: 28 mm.

Peculiarities:

• Low pressure CSM BLF diaphragms provide high performance even at very low pressures, helping to save energy and costs for high pressure pumps, plumbing and diaphragm pressure housings.
• The use of this type of membrane is justified when the TDS of the feed water is low enough and high quality permeate is not required.

Comparison of membrane characteristics:

Comparison of low pressure CSM membranes under the condition of supplying the same water (TDS -500mg/l NaCl) and obtaining the same amount of permeate (25 l/m2-hour) at a temperature of 25 C.
General storage conditions for membranes:
• All elements must be stored in a dry place at room temperature to prevent freezing or overheating. In case of violation of the integrity of the polyethylene packaging, it is necessary to pour a new protective solution into the membrane and pack it hermetically to prevent the appearance of bacteria.
• After the start of use, all elements must always be in the water.
• The water produced during the first hour of operation must be drained to flush out the protective solution from the system components.
• All CSM elements must be stored in a protective solution during storage, transport, or shutdown of the system to prevent bacteria or freezing. The standard solution consists of a 1% soda bisulfate solution or a 1% soda metabisulfite solution (food grade). For a short-term system shutdown (no more than a week), a 1% solution of soda metabisulphite is sufficient to prevent the formation of bacteria.
• The customer is solely responsible for the use of chemicals that are incompatible with the elements. Their use will void the warranty on those items.

Characteristics (operating limits):

• Maximum pressure drop (element) 0.1 MPa.
• Maximum pressure drop (housing) 0.42 MPa.
• Maximum working pressure 4.14 MPa.
• Maximum feed water flow 15.0 m3/hour.
• Minimum concentrate output 3.6 m3/hour.
• Maximum operating temperature 45 C.
• Operating pH 3.0-10.0.
• CIP pH value 2.0-11.0.
• Maximum turbidity 1 NTU.
• The maximum concentration of free chlorine is 0.1 mg/l.
• Maximum SDI 5.0 pollution allowed.

Characteristics when using different types of water.

• Wastewater (SDI <5) 8-12 gfd.
• Wastewater treated with UF (SDI <3) 10-14 gfd.
• Sea water (direct intake) (SDI <5) 7-10 gfd.
• Brackish well water (SDI <3) 8-12 gfd.
• Fresh water (SDI <5) 12-16 gfd.
• Fresh water (SDI <3) 13-17 gfd.
• Well water (SDI <3) 13-17 gfd.
• RO/UF permeate (SDI <1) 21-30 gfd.

Salt restrictions.

• CaSO4 230%.
• SrSO4 800%.
• BaSO4 6000%.
• SiO2 100%.

The indicated values are valid subject to the availability of scale inhibitors for the respective salts.

Potential for CaCO3 precipitation by LSI and SDSI.

• With sediment inhibitor <-0.2.
• LSI (SDSI) with SHMP <+0.5.
• LSI (SDSI) with special inhibitor <+1.5.
• SDSI with any inhibitor <+0.5.