RXSOL 3935 – Oxidizing Liquid Biocide & Microorganism Control Chemical

RXSOL 3935 is an oxidizing liquid biocide and microorganism-control chemical based on sodium hypochlorite. It is designed for microbiological control in a wide range of industrial water-treatment applications, including recirculating cooling-water systems, once-through cooling-water systems, RO pretreatment, wastewater treatment, and water disinfection.

RXSOL 3935 provides a convenient liquid approach to oxidizing biocide treatment and can be used as an alternative to gaseous chlorine in appropriately designed industrial water-treatment systems.

Applications of RXSOL 3935

1. Cooling Water Treatment

Microbiological growth in cooling-water systems can lead to slime, biofilm, biological fouling, reduced heat-transfer efficiency, and corrosion under deposits.

RXSOL 3935 can be incorporated into a properly designed cooling-water treatment program to help control microorganisms and maintain system cleanliness.

2. Once-Through Cooling Systems

Once-through cooling systems can also experience microbiological fouling. Sodium hypochlorite-based oxidizing treatment can help control biological growth when applied according to system requirements and applicable regulations.

3. Reverse Osmosis Pretreatment

Microbial growth can cause serious biofouling of RO membranes. RXSOL 3935 can be considered for upstream microbiological control where compatible with the overall RO pretreatment program.

Because many polyamide RO membranes are sensitive to free chlorine, adequate dechlorination is generally required before treated water reaches the membrane. The treatment system should therefore be designed and monitored accordingly.

4. Wastewater Treatment

RXSOL 3935 can be used in selected wastewater-treatment and disinfection applications where oxidizing microbiological control is required.

Treatment dosage depends on factors such as organic load, pH, temperature, contact time, water quality, and the required disinfection performance.

5. Water Disinfection

Sodium hypochlorite-based products are widely used for disinfection of suitable water streams. Proper dosing and contact-time control are important to achieve the required microbiological reduction while managing residual chlorine.

Remarks

How RXSOL 3935 Works

RXSOL 3935 uses sodium hypochlorite chemistry to provide available chlorine in aqueous systems.

Depending on pH, available chlorine exists primarily as hypochlorous acid and hypochlorite ion. Hypochlorous acid is an effective antimicrobial species that can oxidize and disrupt essential cellular components of microorganisms.

This oxidation mechanism helps control microorganisms in properly managed industrial water-treatment systems.

Benefits of RXSOL 3935

A sodium hypochlorite-based oxidizing biocide such as RXSOL 3935 offers:

• Effective microbiological control

• Oxidizing biocide action

• Liquid-form chemical dosing

• Control of slime-forming microorganisms

• Helps reduce biological fouling

• Suitable for automated dosing systems

• Useful for cooling-water treatment

• Applicable to selected wastewater disinfection systems

• Suitable for selected RO pretreatment applications

• Practical alternative to gaseous chlorine in appropriate applications

RXSOL 3935 for Cooling Towers

Cooling towers and recirculating cooling-water systems can provide favorable conditions for microbiological growth.

If uncontrolled, microorganisms may contribute to biofilm, slime, biological deposits, fouling, and under-deposit corrosion.

RXSOL 3935 can be used as part of an integrated cooling-water treatment program designed around system conditions, microbiological monitoring, water chemistry, and the required oxidant residual.

RXSOL 3935 for RO Pretreatment

RO membrane systems require effective pretreatment to minimize fouling and maintain membrane performance.

Where sodium hypochlorite is used for microbiological control before RO, the residual free chlorine must be controlled because polyamide RO membranes can be damaged by oxidizing agents.

A suitable dechlorination stage should be incorporated where required, and residual chlorine should be monitored before the water enters the RO membranes.