20,000 ~ 50,000 GPD Brackish Water Desalination System

Brackish Water Desalination Systems
20,000 - 50,000 GPD Brackish Water Desalination System

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Brackish Water Desalination Plant General Specification
*Brackish water desalination plant design will depend on indivdual customer’s requiements

Product Data Sheet
Chlorine Dosing System
One metering injection system will be supplied for controlling different elements in the feed water of the RO plant. The metering pump will allow controlling of different functions such as the stroke length and percentage rate. The Chlorine Dosing System adds chlorine to feed water source, protecting the system from bio-fouling.
 
Booster Pump
Delivers feed water to RO plant at 40~50 psi under required feed water flow rate. Grundfos, Tonakflo or others. 316 stainless steel.
 
Multi-Media Filter
Multi-media filtration system is used to filter sand and sediment (turbidity) down to approximately 20 Microns. Both automatic and manual backwash option is available. Corrosion resistant, high performance composite & fiberglass tank will be used to hold the media.
 
Activated Carbon Filter
Activated carbon filtration system is used to remove chlorine from feed water, which protects TFC membrane from damaging chemical reaction with chlorine. Both automatic and manual backwash option is available. Corrosion resistant, high performance composite & fiberglass tank will be used to hold the media.
 
Pre-Filtration System
5 micron cartridge type sediment filter further reduces suspended solids in the feed water stream to RO system.
 
Sodium Metabisulfite Dosing System
One metering injection system will be supplied for controlling different elements in the feed water of the RO plant. The metering pump will allow controlling of different functions such as the stroke length and percentage rate. The Sodium Metabisulfate Dosing System neutralizes chlorine, which is added in the feed water to reduce bacteria. The residual serves as an excellent biocide, which prevents membranes from bio-fouling.
 
Acid Dosing System
One metering injection system will be supplied for controlling different elements in the feed water of the RO plant. The metering pump will allow controlling of different functions such as the stroke length and percentage rate. The Chemical Dosing System prevents membrane scaling.
 
Antiscalant Dosing System
One metering injection system will be supplied for controlling different elements in the feed water of the RO plant. The metering pump will allow controlling of different functions such as the stroke length and percentage rate. The Antiscalant Dosing System prevents the membrane from scaling.
 
Caustic Dosing System
(Post Treatment)

One metering injection system will be supplied for controlling different elements in the product water of the RO plant. The metering pump will allow to control different functions such as the stroke length and percentage rate. The Caustic Dosing System adjusts product water pH.
 
Chlorine Dosing System
(Post Treatment)

One metering injection system will be supplied for controlling different elements in the product water of the RO plant. The metering pump will allow to control different functions such as the stroke length and percentage rate. The Chlorine Dosing System sterilizes product water.
 
UV Sterilization System
(Post Treatment)

Sterilizes product water by alternating the DNA structure inside bacteria.
 
Ozone System
(Post Treatment)

Sterilizes product water by burning off the outer membrane of bacteria.
RO System
 
1. Membrane Housing: corrosion resistant, fiberglass construction, or 316 stainless steel. 400psi or 600 psi.

2. Membranes: Dow Filmtec or Fluid Systems brackish water, TFC membranes.

3. High pressure RO Pump: multi-stage centrifugal, 316
stainless steel. Grundfos, Tonkaflo or others.

4. Motor: 415V/380V/230V/208V/120V, 50hz/60hz, single phase or three phase

5. High pressure side piping material: 316 SS

6. Low pressure side piping material: schedule 80 PVC

7. Concentrate control valve: 316 stainless steel

8. Water quality monitor: brackish water and product water digital TDS meter, brackish water and product water pH meter, ORP meter. Ashcroft, Marshal, Signet, Fisher or equivalent.

9. Flow meters: Panel Mount Digital Flow Meters or rotameter for feed water and product water

10. Pressure Gauges: on the inlet and outlet of every filtration stage, and before and after each RO membrane vessel.
 
11. System controls (automatic or manual operation):
  • PLC control to provide start/stop, sequential, and alarm control.
  • RO System start permissible conditions:
​1. Power On
2. Start button pushed
3. low pressure switch closed
4. permeate water tank level below low level (low and high level switches are on open position)
5. Raw water tank water level switch closed
  • Six conditions will cause the RO to shut down the machine:
1. high working pressure 
2. low inlet pressure (<20 psi)
3. starter overload trip
4. raw water storage tank level low
5. product water storage tank level high
6. emergency shut-down button pushed.
  • Low Feed Pressure Shut Off with indicator light
  • High pressure shut-off switch
  • Product Water and raw water Tank level control
  • System On switch with light
  • Power On switch with light
  • Mimic panel (twin led type)
  • PH Audio and visual alarm
  • ORP Audio and visual alarm
  • Brine flow audio and visual alarm
  • Feed water Temperature audio and visual alarm
  • High TDS diversion
  • High turbidity diversion
 
Membrane Cleaning/Flushing System
Includes high flow pump, 316 SS, heater. It cleans membranes when needed, extends membrane life. Use chemicals for cleaning. Automatic cleaning/flushing. Installed with automation, valves. Etc. With common service tank for product/cleaning/flushing. The cleaning system has pressure transmitter at In/Out of each membrane vessel. If Delta P is greater than design Delta P, then audio and visual alarm will trigger.