Biocides

Biocides

A biocide is a product that is intended to control harmful microorganisms by chemical means. When selecting a biocide for use in a system; whether as a biocidal flush, maintenance dose or a shock dose, several factors need to be considered. This includes contact time, concentration, pH, and efficacy against microbiology present in the system amongst other factors.

The choice between oxidising and non-oxidising biocides depends on many factors that are mentioned below. In some cases, a combination of both types of biocides may be used synergistically to achieve comprehensive microbial control while minimizing adverse effects.

Furthermore, WTP have invested heavily in conforming to the BPR, and latterly the GB BPR, to ensure that you get a wide range of biocides to use that comply with the latest GB BPR regulations.

Use biocides safely, always read the label!

Our Biocide Guides

Oxidising Biocides

Oxidising biocides play a crucial role in water treatment when rapid and broad-spectrum microbial control is required. These biocides work by oxidising (electron transfer reaction) and disrupting the cellular structures of microorganisms, leading to cell death. They achieve this by releasing oxygen or reactive oxygen species that interact with essential cell components, including proteins, lipids, and nucleic acids.

There are many uses for oxidising biocides, including shock treatment, residual disinfection, emergency disinfections and routine disinfections These biocides find applications in various treatments such as shock treatment, residual disinfection, emergency disinfections, and routine disinfections.

Be sure to consult a water treatment professional before using an oxidising biocide. Several factors must be considered before dosing, including the type of system, system characteristics, microorganisms present, regulatory requirements, and compatibility with system materials.

Non-Oxidising Biocides

Non-oxidising biocides are preferred when a longer-lasting microbial control is desired. These biocides have diverse mechanisms in which they breakdown harmful bacteria, algae, and fungi, including enzyme inhibition and metabolic pathway disruption.

While non-oxidising biocides have many similar applications to oxidising biocides, they are particularly useful in scenarios involving microbial resistance, low pH or temperature conditions, and systems containing sensitive materials.

Proper dosage, monitoring, and maintenance of water quality parameters are essential to ensure effective and safe use of non-oxidising biocides in water treatment applications.

Technical Help

Our expert scientists are here to help with your water treatment needs. Here are a few of our most frequently asked questions. If you can’t find the answer you are looking for get in touch by clicking here

  • Yes, unfortunately bacteria can develop a resistance to biocide, like any organism when exposed to a poison for long enough. In this case, you may want to introduce a new biocide to the system. For many cooling tower treatments, two different biocides are used, typically an oxidising and a non-oxidising biocide.

  • When dosing a closed system, we recommend using a non-oxidising biocide. Although they are effective, you want to avoid using oxidising biocides as they can contribute to the corrosion in a closed system.

  • When dosing a system that is used for potable water, you must be very careful not to overdose and to make sure you adhere to the strict regulations.