Containerized Seawater System with UF Pretreatment - 10,000 GPD - USA

Product Description

This particular application is very unique as we are treating the open intake seawater with an Ultrafiltration system as pre-treatment and passing it through two seawater reverse osmosis systems to generate a concentrated salt rejection. The entire plant is projected to produce 10,000 gallons per day in the state of Oregon.

The concentrate from the first seawater RO system is taken and passed through a second RO system to further concentrate the reject. This particular customer is not interested in the clean permeate but rather the concentrated reject stream to manufacture and process crystallized salts.

The seawater systems include a feed pump to pressurize the feed to meet the requirements of our duplex high-pressure pumps. It also includes 1000 PSI pressure vessels with duplex stainless-steel pressure switches to prevent corrosion of the gauges. This results in excellent longevity as it is made from excellent material. Additionally, we have included a reject conductivity sensor that will monitor the reject per the clients’ intended application as opposed to monitoring the permeate. To further reduce the permeate volume, we included a fresh water flush tank system to extend the life of the system and to always have it ready on standby.


The water source is from an open intake seawater well so we offered incorporated our UF system for as pre-treatment to meet the restrictions of the RO feed. Included in the UF system is a feed and backwash pump, screen filter on the feed side, throttle valve pump, and digital instrumentation controlled by central Siemens PLC for the entire plant. This advanced PLC will control all the seawater systems, UF system, flushing, and all chemical dosing for the chemically enhanced backwash on the UF. After the pre-treatment filtration system (UF), the filtrate is then taken and passed through to the RO systems.



Per the circumstantial application, our team engineered a seawater desalination system that is able to concentrate the reject at maximum level. Aside from giving the client a piece of mind and the containerization option of the system, we are able to give the client a return investment of one year for this entire plant.



  • Superior filtration performance with high flux
  • Very small nominal pore diameter (0.03 µm)
  • Efficiently gets rid of bacteria and viruses
  • Periodically back washed and air scoured to enhance overall performance and casting off the fouling layer to extend working life
  • Low fouling membrane modules
  • UF Outside-In or Inside-Out Configuration lets in reduced plugging and greater solids loading
  • Basic, vertical, modular plan approves low cost, compact systems
  • Effective membrane cleaning has a high chemical resistance and temperature tolerance


(1 review) Write a Review
  • 5
    Cost effective...

    Posted by Yale C. on Feb 4th 2019

    Our team evaluated 3 bids and we went with Pure Aqua due to cost-effective pricing and very compact footprint which is needed in our plant due to space constraints.

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