SUEZ Water - Water Technologies & Water

Eliminate scale and reduce fouling in your membrane systems

RO systems create salt concentrated water streams that could produce scale or fouling, while “the narrow feedwater channel found in your spiral would and hollow fiber elements accentuates scaling and fouling”. SUEZ RO membrane antiscalants are pretreatment programs designed to eliminate scale and reduce fouling in membranes systems, regardless of the feedwater source.

While treatment with an ordinary antiscalants does provide some improvement, the use of SUEZ’s patented chemistry maximizes efficacy against a broad range of scale-forming substances and keeps fouling material in suspension.

What is an Antiscalant?

An antiscalant is a pretreatment that gets injected into the feedwater that flows through the RO membrane, preventing the membrane from scaling. RO membrane scaling occurs when particles accumulate on a membrane, causing the membrane’s pores to plug. Some common membrane foulants and scalants include calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate, calcium fluoride, iron, colloidal material, silica and other organic contaminants.

SUEZ suggests adding a RO membrane antiscalant to your pretreatment program to improve efficacy against the broad range of scale-forming substances and to keep fouling material in suspension.

Antiscalant Dosing

The typical antiscalant dosing range is between 0.5 and 4 mg/L. To determine the adequate dosage rate for your system, it is recommended to use SUEZ’s Argo Analyzer* simulation software. The Argo Analyzer will provide the appropriate application dosage based on your specific water chemistry and system design.

Argo Analyzer is a tool designed to provide guidance on the best choice of antiscaling chemicals for your RO plant. Our software is very accurate in recommending the best Hypersperse product, the correct dosage and further guidelines for reverse osmosis systems. It also gives information about cleaner selection and cleaning procedures.

Membrane Antiscalant Features

SUEZ’s antiscalant pretreatments, used together with our Argo Analyzer simulation software, will provide one or more of the following benefits:

  • Effectively controls scale, including calcium carbonate, calcium sulfate, strontium sulfate, calcium fluoride, iron, colloidal material, silica, and other organic and inorganic contaminants
  • Compatible with most leading RO membranes
  • Products are NSF 60 certified
  • Reduced need to handle sulfuric or hydrochloric acid
  • Reduced cleaning and maintenances costs
  • Lower operating costs
  • Ro system operate at higher recovery rates due to reduced scale

Types of Antiscalants for RO membranes

SUEZ provides a comprehensive solution in projecting scaling potential for major scale-forming ions present in membrane systems. Our package of solutions includes engineering level expertise for antiscalants program optimization, customizes solutions and personalized service. Each potential application is evaluated to meet the specific treatment goals of the system. Some of our anti scaling chemicals include:

  • Hypersperse* Antiscalants – Highly effective liquid products developed to control scale precipitates and reduce particulate fouling within membrane separation systems.

Featured Video


Open this animation to learn more about Argo Analyzer 4.0 and the benefits of our Hypersperse* antiscalants.


*A trademark of SUEZ. May be registered in one or more countries.

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