Permeate yield up to 90 %

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The concentrate-staged reverse osmosis with high recovery up to 90 % is used for desalination of softened water with a salinity of up to 1,000 mg/l. 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 PLC Siemens S7-1200 allows visualization of the plant as well as optimal control and evaluation of the plant operation, optional data transfer via interfaces, remote access and subsequent control extensions are possible. Extension or adaptation of the controller possible (on request at extra cost).

Benefits

• Convenient and user-friendly PLC S7-1200
• High yield of up to 90 % saves water and minimises operating cost
• Equipment with VSD (FU) saves 30 - 50 % electricity cost, maintains permeate production constant and enables a longer lifespan as well as particularly quiet operation
• Concentrate flushing device KSE and connection kit ARA for manual cleaning unit MRA already included

Applications

• Desalination of softened water
• Suitable for all industrial applications
• Ideal for minimising water and energy costs

Controller :

PLC Siemens S7-1200

Desalination rate min.:

98.5 %

Permeate recovery:

85 – 90 %

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 softened feed water with drinking water quality or appropriately pre-treated well or surface water. The unit is designed for a salinity (TDS) of 1,000 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 – 25 °C

Feed water pressure:

2 – 4 bar

Pressure fluctuation:

± 0.5 bar