commercial and industrial reverse osmosis desalination

energy-efficient industrial and commercial Reverse Osmosis water desalination

Our energy-efficient Reverse Osmosis water desalination systems deliver the maximum treated water-flow with the minimum power consumption. 

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Salinity in water is the sum of all the disolved ions. The presence of these ions is the result of the dissolution of different salts (not just NaCl or common salt) while water is in contact with different types of mineral soil. This way, the terrain's geological features have a determining effect on the chemical composition of the water that circulates in it.

Water desalination consists in the removal of such dissolved salts.

Commercial and Industrial reverse osmosis Water desalination

A commonly used method to evaluate the salinity or total amount of dissolved minerals in water is the concentration of total dissolved solids (TDS). This parameter is the sum of all dissolved ions such as sodium, potassium, bromide, boron, calcium, magnesium, chloride, sulfate, bicarbonate, nitrate, metals, etc. TDS or salinity are usually expressed as mg/L or parts per million (ppm).

typical Water salinity levels for different sources:

Typical salinity levels for water found in oceans, lakes and rivers are:

  • 500 mg/L is considered the top salinity limit for potable (fresh) water.
  • Rainwater has a typical salinity of 20 mg/L
  • Seawater has an average TDS concentration of 35,000 mg/L, with an actual range from 33,000 to 36,000 mg/L at various locations and depths.
  • Groundwater (lakes, rivers and underground) presents a high TDS variability. Being a consequence of the terrain’s nature and structure typical TDS values range from 200 mg/L to 15,000 mg/L. 

 

Energy-efficient reverse osmosis Water desalination plants

Watercore engineers have collaborated with industry leaders to design our SMART series of energy-efficient reverse osmosis water desalination systems. 

The main benefit of these SMART energy-efficient reverse osmosis water desalination units is that, with a powerful PLC control, electronic pressure, flow and conductivity sensors and motorised valves are constantly optimising the operational settings to deliver the maximum treated water-flow with the minimum power consumption. 

This game-changing technology is applicable to multiple industries such as irrigation or waste-water treatment and was conceived focusing on optimised energy costs and high water recovery.

Our RO desalination units are also equipped with an industrial MODBUS communication bus for integration in complex industrial environments, can be easily controlled locally or remotely by means of a powerful HMI interface and can be programmed to send alarms and notifications by email.

Dry contacts are provided for pretreatment units or storage tanks. When needed they can  can also be controlled remotely with a TCP/IP interface and can be easily programmed to send alarms and notifications by email.

Available as skid-mounted or containerised units, our energy-efficient reverse osmosis water desalination systems are available for tapwater, ground water to seawater desalination and cover all type of application including drinking water, irrigation waterfeedwater for cooling towers and other industrial process water.
 
Australian made with high quality components our energy-efficient reverse osmosis water desalination systems arrive at your facility fully factory-tested and ready to be energised. This way installation, commissioning and start-up times are minimal.
 

In order to achieve high recovery rates for our brackish reverse osmosis plants, we use three-stage configurations for large systems or concentrate recirculation for smaller systems and pilot units. This way we can reach up to an 80% overall recovery rate while each membrane still works under its standard 10% recovery rate. Recirculation allows membranes in small units simulate concentration conditions applicable to the final element in an industrial installation with low scale hydraulics.

 

energy-efficient reverse osmosis water desalination units, standard features and options:

Standard Technical Data *(1) BRO-15 BRO-20 BRO-25 BRO-35 BRO-50 BRO-120 BRO-250 BRO-500
Permeate flow (m3/d)
15
20
25
35
50
120
250
500
Feed TDS
< 6000 ppm
Feed pressure
2 bar (min) – 4 bar (max)
Permeate TDS
< 200 ppm (screen-selected by user for irrigation units)
Recovery
65% – 80%
Rejection
97% – 99%
Recirculation flow
Yes
Membrane Type
Low Energy – 4″
Low Energy – 8″
Array
1/1/1
1/1/1/1
1/1/1/1/1
2/2/2/2
2/2/2/2/2
1/1
1/1
2/2
Hydraulic connections

Feed
Permeate
Concentrate


1″
3/4″
3/4″

1″
3/4″
3/4″

1″
3/4″
3/4″

1″
1″
3/4″

1″
1″
3/4″

1 1/2″
1 1/2″
1″

2″
2″
1″

3″
3″
2″
Dimensions

Width
Depth
Height


1400 mm
650 mm
1800mm

2400 mm
650 mm
1800mm

1400 mm
1000 mm
1800mm
Power (KW)
2,2
7,5
15
30
Power supply
50Hz, 230V (1-Phase) or 400V (3-Phases)
50Hz, 400V (3-Phases)
Qualified Feed Water Quality*(2)
Total dissolved solids (TDS)
< 6000 ppm
PH value
2-11
Iron
< 0.05 ppm
Aluminium
< 0.05 ppm
Manganese
< 0.05 ppm
Free Chlorine
0 ppm
Oil and grease
0 ppm
Turbidity
< 1 NTU
(TOC) Total Organic Carbon
< 2 ppm
*(2) higher values of any of these parameters will require a pre-treatment. Contact us for a personalised solutions
Features & Options Standard Option
5 & 1 micron cartridge filters
Standard
High pressure pump
Standard
Low pressure pump
Optional
Stainless Steel 316 piping
Standard
Auto-flushing
Standard
Antiscalant dosing system
Standard
Chlorine Sterlization (pretreatment)
Optional
Iron, Aluminium, Manganese removal (pretreatment)
Optional
Turbidity removal (pretreatment)
Optional
Skid mounted
Standard
Containerised
Optional
VFD for high pressure pump
Optional

learn more about The reverse osmosis technology:

Reverse Osmosis (RO) is a pressure-driven membrane separation technique used to separate dissolved solids from solutions. Semipermeable membranes allow water and some dissolved solids to pass through, retaining the majority of dissolved solids.

Rejection is defined as the degree to which dissolved solids are retained by the membrane. It is expressed in terms of percent of feed concentration and typical values for RO membranes are 98% or 99%. That means that 98% to 99% of dissolved solids are retained by the membrane.

The higher the concentration of dissolved solids, the greater the osmotic pressure of the solution and the driving pressure required to force the water flow inside the membrane in the reverse osmotic direction. As a consequence, typical working pressures for low salinity waters are 10-20 Bar, while typical working pressures for seawater RO are > 50 Bar.

Water salinity comes as a combination of concentrations of all the dissolved ions present in water. It is also called TDS (Total Dissolved Solids).

Measuring salinity or TDS involves collection and evaporation of a discrete water sample at 105°C followed by weighing of the solids remaining after evaporation. At the same time salinity is a critical value that requires continuos monitoring for many water treatment process and in particular for reverse osmosis. 

Therefore, in practice, TDS concentration is often monitored continuously by measuring the electrical conductivity (EC) which reflects the water’s ability to conduct electricity. Conductivity is expressed in microsiemens per centimetre (μS/cm) or decisiemens per metre (dS/m).

The ratio between TDS and EC in water depends on the type of dissolved ions and the temperature and usually varies between 0.67 and 0.70.

No, reverse osmosis cannot remove dissolved gases in water.  In fact that is the reason why reverse osmosis permeate is sometimes acidic, as dissolved CO2 in the feed water permeates as product and dissociates into carbonic acid. 

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