With the increasing demand of clean water globally, membrane desalination has become one of the commonly used methods to provide pure water. Reverse osmosis (RO) systems are used for the removal of salts and minerals from brackish, sea, bore-well and other surface waters. In the process of reverse osmosis, water is pushed under pressure through a semi-permeable membrane and collected as permeate. Minerals and salts are thus “concentrated up” in the reject stream and this gives rise to the potential of scale formation as their respective saturation limits are exceeded.

Along with scale formation during the membrane desalination process, other potential issues like organic fouling and microbiological growth causing biofilm formation on the membranes can lead to restricted flows and ultimately a lower recovery rate and sometimes permeate quality. To maintain the reverse osmosis unit’s permeate flow under these conditions, more operating pressure is required and this often leads to higher running costs.

The CrestoPro R series of RO antiscalants aim to control potential scale formation in reverse osmosis systems and to help it operate at its design recovery rate. Our solutions have been built upon the proven chemistries and some further improved to suit today’s ever-changing landscape as your plant seeks to produce more pure water. To complement our RO antiscalant range of products, CrestoPro R145 is a fast acting non oxidizing biocide for application in reverse osmosis systems and has a proven efficacy at low concentrations. In addition, CrestoPro R800 and R820 are improved formulated cleaners to help restore your membrane desalinatoin systems to achieve its design recovery rate.

Along with monitoring tools and the technical know-how to interpret operating parameters before selecting and applying the appropriate RO antiscalant, biocide and cleaning solutions, our team of experts will work together with you to achieve your goals.

Scale Control

CrestoPro R-series of RO antiscalants and are designed to control scale and particulate fouling in your reverse osmosis units, with the aim to achieving their design recovery rate.

• CrestoPro R430 – Basic phosphonate-based antiscalant suitable for controlling carbonate and sulphate scales
• CrestoPro R432 – Non-polymeric antiscalant excellent for calcium, barium, and strontium sulphate scale control.
• CrestoPro R490 – Neutralized polymeric antiscalant with dispersant properties. Alternative to move away from phosphonate based chemistries
• CrestoPro R491 – Neutralized polymeric antiscalant excellent for carbonate and sulphate scale control. Control deposition of hydroxide scales that could form on the second pass of RO systems designed to remove boron.
• CrestoPro R493C – Concentrated polymeric antiscalant with dispersant properties. Moderate silica scale inhibition and iron tolerance.
• CrestoPro R494 – Premium polymeric antiscalant, partially neutralized and excellent for carbonate, sulphate and fluoride scales. Superior silica scale inhibition up to 400 mg/l in the concentrate. Excellent for both soluble and insoluble iron.

Cleaners

CrestoPro R-series of cleaners are specially formulated acid and alkaline cleaners to tackle the toughest deposits.

• CrestoPro R800 – low pH formulated cleaner highly effective in removing metal hydroxides, calcium carbonate and other similar scales. High cleaning effectiveness at ambient temperature, even from 15°C up to maximum recommended temperature by membrane manufacturer.
• CrestoPro R820 – high pH formulated cleaner highly effective in removing organics, silt and other particulate deposits. High cleaning effectiveness at ambient temperature, even from 15°C up to maximum recommended temperature by membrane manufacturer.

Biocidal Control

CrestoPro R series of biocides are formulated to be used for application in reverse osmosis systems and has a proven efficacy at low concentrations to help remove biofilm and improve efficiency.

• CrestoPro R145 – fast acting non oxidizing biocide for application in reverse osmosis systems and has a proven efficacy against bacteria, fungi, yeast, cyanobacteria (blue-green algae) and true algae.