Protec RO

For Preventing Fouling by Organics, Biological Material, Colloids


Besides dissolved salts that can form scales, there are organic and biological materials that can also foul membranes. Colloids, silt, other fine particulates also can act as foulants. These materials usually can be removed by good membrane cleaning. However, some feed waters contain such a large amount of these types of foulants that the system needs to be cleaned far too frequently. Antifoulants are injected into the feed water, in the same fashion as antiscalants, to react with this mixture of colloids and organics and prevent them from coating the membrane surface and lowering productivity.

What kind of sites benefit from injecting Protec RO™?

Protec RO™ is injected to keep organics and colloids such as silt from fouling the membrane. It is added to increase productivity, increase the time between cleanings and allow membrane cleanings to be more effective. Protec RO™ is used on desalination membrane systems with open intakes, sites using brackish surface waters, and at water reclamation sites.

Advantages to using Protec RO™

  • Inhibits deposition of organic colloidal particles.
  • Certified under ANSI/NSF Standard 60 for drinking water production.
  • Compatible with major manufacturers’ RO, NF, and UF membranes.
  • Moderate antiscalant activities combined with particulate control makes it an ideal antifoulant for sea, river, and lake waters.
  • Inhibits anchoring of microorganisms on membrane surfaces.
  • Environmentally friendly dispersant. Food-grade additive.

Specification: Liquid

Appearance: pH: Specific Gravity:
Clear, straw colored 5.2 ± 1.29 1.028 ± 0.015

Specification: Powder

Appearance: pH (1% in water):
Yellow powder 5 (approx.)


Protec RO™ should be injected into the feed stream prior to cartridge filter. Effective pH range is 4–12. If frozen, thaw and stir before use. Stability is >2 years, excellent, but best used within 12 months.

Dosing Recommendations:

In the useful dosage range of 1–100 mg/L (liquid), and 0.1 – 10 mg/L (powder), the liquid being 10% w/w of the powder in water plus a preservative. The initial dose should be 5 mg/L. By monitoring the concentrate stream and trend charts, optimal dosage can be achieved for the control of colloidal particles in feed waters of microbial, plant or inorganic sources, and organic compounds in industrial process or waste streams. For concentrations of food products, Protec-RO™ is acceptable as an additive.


  • 5 gal pails
  • 55 gal drums
  • 250, 275 gal totes
  • Tankers
  • Custom Sizes Available

Rev. 7/2012