30 - 50 % less electricity cost

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The brackish water reverse osmosis unit is used for desalination of water with a salinity of up to 5,000 mg/l and is operated with a permeate yield of 50 - 75 % depending on the salinity of the feed water. It is equipped with a high-quality centrifugal pump with variable-speed drive (VSD = FU). Frequency-controlled operation reduces electricity cost by 30 - 50 %, extends the lifespan of the unit and keeps permeate production constant irrespective of operation pressure. The RO digital microprocessor controller enables fully automatic operation with logging of all relevant operating data and freely adjustable limit values. The unit can be connected to the central control system via optional interfaces.

Benefits

• Use of adapted materials for resistance even to high salt content in the concentrate
• Equipment with VSD (FU) saves 30 - 50 % electricity cost, maintains permeate production constant and enables a longer lifespan as well as particularly quiet operation
• Versatile RO digital controller with logging of operation data and many parametrisation options
• Optionally with PLC Siemens S7-1200
• Control and connection of two dosing units possible (e.g. antiscalant and acid)

Applications

• Desalination of brackish water or well and process water with high salt content
• As second stage for existing / new RO units to save water (reduction of wastewater by 50 - 75 %), UO-D 250 BW can also be used as piloting / trial unit
• Suitable for reduction of electricity cost

Controller :

RO digital (PLC optional)

Desalination rate min.:

97 %

Permeate recovery:

50 – 75 %

Permeate back pressure max.:

0.3 bar

pH value operation:

6.5 – 9.5

pH value cleaning:

2 – 12

Ambient temperature:

5 – 40 °C

Conditions of use:

The unit may only be used for the desalination of hardness-stabilized brackish water / reverse osmosis concentrate.

For unit sizes from 250 to 1,000 l/h, it might be necessary dilute antiscale before use to ensure constant dosing and thus stable operation.

The unit is designed for a salinity (TDS) of 5,000 mg/l and a temperature of 15 °C. Under these conditions, the projected permeate output is achieved even after three years of operation. The permeate yield depends on the raw water quality and the pre-treatment. The following parameters must be maintained in the feed water:

Free chlorine:

not detectable

Iron (Fe):

< 0.2 mg/l

Manganese (Mn):

< 0.05 mg/l

Silica (SiO2):

< 25 mg/l

Silt density index (SDI):

< 3

Feed water temperature:

5 – 35 °C

Feed water pressure:

2 – 6 bar

Pressure fluctuation:

± 0.5 bar