In the dynamic world of water treatment, the efficacy of biocidal products is paramount. At B & V Chemicals, our commitment to delivering technical excellence is reflected in our range of Silver Stabilised Hydrogen Peroxide products. This blog post addresses some of the most frequently asked questions about our range, providing insights into its applications, benefits, and compliance with industry standards.
The Range:
We offer three concentrations of Silver Stabilised Hydrogen Peroxide, each designed for specific water treatment needs:
SuPerSil (Huwa-San TR50):
- Concentration: 50% hydrogen peroxide.
- Ideal for commercial water services as a continuously dosed biocide.
- Designed for down water services and water tank disinfection.
Huwa-San TR20:
- Contains 20% hydrogen peroxide.
- Tailored for use in small to medium water systems.
- Ready-to-use biocidal product with 3% hydrogen peroxide.
- Effectively combats bacteria, fungi, yeast, spores, viruses, and mycobacteria.
- Versatile applications, including water, surface, tool disinfection, and vaporisation for large areas.
Here is an informative graphic to illustrate the unique advantages of the Huwa-San range:
Frequently Asked Questions:
Q: What is the maximum pH recommended when using Huwa-San TR50?
A: In use, Huwa-San remains stable and effective within a pH range of 2.9 to 10.
Q: What is the shelf life of Huwa-San TR50?
A: Huwa-San TR50 boasts a 2-year shelf life, batch controlled for quality assurance.
Q: Are there issues with Huwa-San TR50 in hot water systems compared to Chlorine dioxide?
A: Huwa-San is less affected by high temperatures than chlorine dioxide and can be used in hot systems as it remains effective up to 95⁰C with very little loss of efficacy. Chlorine dioxide loses 70% of its efficacy when held at 70oC for 4 hours. Ultralox 40 is also more stable than chlorine dioxide and on average will lose between 25 and 30% of its activity when held at 70oC for 4 hours.
Q: What additional applications are there for Huwa-San?
A: Huwa-san can be used in many varied applications extremely effectively. A selection of these applications are listed below:
1. Uses in organic food production:
Independent laboratory testing has demonstrated that Huwa-San is unique in leaving no residue after use with the degradation products being water and oxygen. For this reason, the product has now been verified as compliant with current organic standards for use as a leave in place disinfectant in organic food production facilities i.e., for cleaning preparation equipment, surfaces, conveyor belts, trays etc and does not require a freshwater rinse prior to the production of organic approved foodstuff.
2. Disinfection of ion exchange resins and RO membranes:Huwa-San is used to clean and disinfect ion exchange resins and Reverse Osmosis membranes.
3. Disinfection of water features and fountains.Huwa-San TR50 produces clearer and cleaner water than when dosing with Bromine.
4. Pool and Spa- Disinfection of swimming pools, footbaths, hot tubs, whirlpool baths and saunas
- Surface disinfection of floors and walls around the pool and spa.
- Legionella control.
5. Irrigation systems in greenhouses / horticulture.
6. Animal husbandry and drinking water.
7. Disinfection by fogging
8. Disinfection against coronavirus / norovirus.
Q: Can Huwa-San TR50 help reduce water temperatures?
A: Yes, by following guidelines in HSG 274, hot water temperatures can be reduced while ensuring efficacy against legionella:
2.86 If hot water is not needed for other reasons, e.g., for kitchens or laundries, and there is no requirement to store hot water at 60°C (or distribute at 50°C), then hot water temperatures can be reduced. As reducing hot water temperatures will leave the system vulnerable if there are any lapses in the biocide control regime, the control system should be checked at least weekly to ensure it is operating effectively and continuing to control legionella.
2.87 Any reduction of hot water temperatures should be carried out in stages and temperatures only reduced when efficacy against legionella is confirmed, with monitoring for legionella and biocide levels in the water system carried out at each stage.
Q: How do I neutralise Huwa-San TR50 if needed?
A: Huwa-San does not generally need to be neutralised as it breaks down to oxygen and water and the silver at very low ppb levels does not bioaccumulate but Huwa-San TR50 can be neutralised, if required using sodium bisulphite.
Q: What equipment is needed for continuous dosing of Huwa-San TR50?
A: Huwa-San TR50 is dosed using a simple proportional dosing system, which is cost-effective and easy to operate and maintain. Ultralox 40 and chlorine can also be dosed using simple proportional dosing equipment.
In comparison, Chlorine Dioxide requires special dosing equipment. The system requires several safeguards to protect against pump failures and over-dosing.
Q: What are the dose rates and contact times for different applications of Huwa-San TR50?
A: Guidance can be supplied to our ‘Own Label’ customers for the most widely used applications of Huwa-San TR50 including the disinfection of domestic hot and cold-water systems. This is available on request.
For further information on our Silver Stabilised Hydrogen Peroxide range, contact our technical team at: ownlabel@bvwater.co.uk.
