HIROX® (High Recovery Reverse Osmosis) combines our CIF® (continuous ionic filtration) with reverse osmosis (RO) to provide a low cost, highly effective water treatment process. HIROX® uses ion exchange to remove di- and tri-valent cations such as calcium, magnesium and heavy metals from waste waters. These ions are primarily responsible for the precipitation (scaling) that occurs on the RO membranes when operating at high recoveries. With this scaling potential removed, the RO process can be more efficient with higher recoveries, resulting in lower brine volumes.

The RO brine is used to regenerate the CIF® resins, providing chemical free pre-treatment for the RO. The CIF® process consists of a series of resin filled columns which are designed for specific functions, including filtration & ion exchange, cleaning, and resin regeneration.

Typical HIROX® Arrangement


Clean TeQ Water’s HIROX® technology can treat a wide range of feed waters by removing both suspended particles (TSS) and dissolved contaminants (TDS) via the integrated ion exchange and RO. Flowsheets can be simplified, and recoveries increased for potable and wastewater applications. Operational costs (especially power) are much lower than other processes used for these applications.

HIROX® has the following advantages:

  1. Extremely high recoveries (Typically 95-99%)
  2. Chemical free pre-treatment by using RO brine to regenerate the ion exchange resins
  3. Greater tolerance to solids in the feed, with CIF® tolerating up to 150 mg/L TSS
  4. Resistance to scaling/fouling, usually with no pre-treatment required before HIROX®
  5. Low operational cost
  6. Greater tolerance to feed water quality and flowrate variations
  7. Fully automatic system


Typical IndustriesHIROX® Can Remove
Municipal Reuse – reuse for potable, industrial or irrigation with higher recovery for less brineHardness
Mining Water – hardness and metal ion removal followed by reverse osmosis for higher recoverySalinity
Surface Water Treatment & Groundwater Treatment – hardness and metal ion contaminant removal before RO, producing potable, industrial or irrigation water.Iron, Manganese, and other Metal Cations
Power Plants – high quality boiler water and treatment of FGD water with minimum brine productionTSS
Industrial Water – treatment of water and brines with minimum liquid dischargeTDS and Other Contaminants Removed by RO

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