Biocides | Biocide Water Treatment

What is Biocide Water Treatment?

Biocide water treatments are chemicals that help maintain the water quality in cooling towers and water systems. If left untreated, the water cooling process can encourage the growth of bacteria, algae and fungi. This leads to contaminated water, harmful toxins, and serious conditions such as Legionella disease.

Oxidising and non-oxidising biocide chemicals treat your water, destroying and preventing the growth of microorganisms. Biocides also help reduce equipment corrosion, improving system longevity and efficiency.

Choosing The Right Biocide For Your System

Oxidising Biocides

Oxidising biocides are chemical products that attack the cell structure of microorganisms. Oxidising the organism's cells disrupts their function, killing them and controlling any further risks. They’re suited to open cooling systems, and include key chemicals such as chlorine, bromine, chlorine dioxide, hydrogen peroxide and ozone.

Product	Purpose	Benefits	Composition	Application
BV102	Tanks Down-water Services Potable Water Systems	Highly effective oxidant Disinfect	Chlorine-based 14/15% Sodium Hypochlorite liquid	Disinfection Shock treatment Continuous dosage
BV1014		Disinfectant for a wide range of applications	Chlorine-based Calcium Hypochlorite tablets	Tablet form of BV21
BV1037	Hard Water Areas	Highly effective oxidant An antiscalant	Chlorine-based 14/15% Sodium Hypochlorite Antiscalant Chlorine	Continuous dosage
BV1103 ULTRALOX 40	Domestic & Industrial Water & Ancillaries Down Water Services	Microbial control & removal Safe & effective Easy-to-use Approved under Regulation 31	Chlorine-based	Stable active halogen liquid Approved formulation Continuous dosing of potable water
BV125	Wide range of disinfectant applications	Slowly reacts with water to release Chlorine Effective disinfectant	Chlorine-based Trichloro Isocyanuric acid	Chlorine tablets Slow-release 20g tablets
BV126	Wide range of disinfectant applications	Very slow. Reacts with water to release Chlorine Effective disinfectant	Chlorine-based Trichloro Isocyanuric acid	Chlorine tablets Very slow release 20g tablets
BV21	Wide range of disinfectant applications	Easy-to-use granules Rapid dissolving properties	Chlorine-based Calcium Hypochlorite	Rapid dissolving granules
BV54	Cooling Towers Open Cooling Systems	Biocide treatment Biodispersant treatment Biofilm prevention	Chlorine-based	Dosed 1:1 with BV55 to generate Hypobromous Acid
BV92	Wide range of disinfectant applications	Fast-dissolving tablets Easy-to-use	Chlorine-based Sodium Dichloroisocyanurate	Small tablets enable accurate dosing 1 tablet = 1 ppm in 1000 litres
BV138	Cooling Towers		Bromine-based Concentrated Sodium Bromide solution	Dosed 1:3 with BV54 to generate Hypobromous Acid
BV1422	Cooling Towers		Bromine-based Sodium Bromine solution	Dosed 1:1 with BV54 to generate Hypobromous Acid
BV476	Cooling Towers Water Features		Bromine-based Mixture of Brominated & Chlorinated Hydantoins	Tablet form A purpose-built brominator is recommended Timers or redox control preferred
BV55	Cooling Towers		Bromine-based Sodium Bromide solution	Doses 1:1 with BV54 to generate Hypobromous Acid
BV659	Tanks Down Water Service Pipework Potable Water Systems	Disinfectant Removes biofilm Approved constant dose biocide	Peracetic acid-based Silver stabilised Hydrogen Peroxide	Extensive BPR Authorization in UK for PT02-05
BV103	CIP Procedures Down Water Services Heat Exchangers Para Flows Cask Rackers Fillers & Filters	Effective disinfection Cleans complex CIP routes	Hydrogen Peroxide
BV392	Food & Drinks Industry Brewery Dairy & soft drinks terminal rinse	Softener resin disinfectant Sanitiser Rapid action Broad-spectrum biocide	Peracetic Acid
BV1634	Tanks Down Water Service Pipework Potable Water Systems	Dilute version of BV659	Silver stabilised Hydrogen Peroxide 20% solution
BV1633		Hard & hazardous surface disinfectant Ready-to-use Proven virucidal & bactericidal action	Silver stabilised Hydrogen Peroxide Ready-to-use 3% solution
BV19	Chlorine dioxide generation	Coloured pink with food-safe dye Easy-to-use Supplied in clear drum with red cap	Chlorine-based 9% Hydrochloric Acid	Dosed 1:1 with BV123 via generator
BV123	Chlorine dioxide generation	Supplied in clear drum with blue cap	Chlorine-based 8% Sodium Chlorite solution	Dosed 1:1 with BV19 via generator
BV1053 & BV1054	Tanks Down Water Service Pipework Potable Water Systems	Effective disinfectant Removes biofilm Wide range of applications	Liquid, 2-part product for ClO2 generation	Activated on site using supplied activator Generates 1% ClO2 solution
BV1304	Tanks Down Water Service Pipework Potable Water Systems	Small-scale disinfection Easy-to-use	Chlorine Dioxide	Tablet form 1 tablet in 1L = 2000 ppm ClO2 Ideal portable ClO2 source

Non-Oxidising Biocides

Non-oxidising biocides attack the walls of microorganisms in water. They suffocate them, prevent reproduction, and dissolve cell walls to break down and erase microbial growth. You may require one or two non-oxidising biocides, which work in open and closed cooling systems.

Check out our guide to using non-oxidising biocides!

Product	Purpose	Benefits	Composition	Application
BV1011	Small Water Tanks Air Conditioning Systems	Controls bacteria levels Removes odours Reduces sludge & blockages Non-hazardous Non-corrosive	Biocide Quaternary ammonium compound	Tablet form Fully soluble: leaves no residue
BV105	Open & Closed Systems	System protection Broad-spectrum bactericide Low-toxicity	BNP	Effective from pH 6.0 to 8.0 Stable up to 40°C
BV1441	Industrial Recirculating Water Systems Food contact applications, pasteurisers, air washers, heat exchangers	Rapid action Effective vs Legionella, algae, fungi Low-toxicity	DBNPA	Breaks down to low-toxicity end products
BV1507	Open & Closed Systems	Flushing & system protection Rapid biocidal action Broad-spectrum activity Effective vs SRBs	Glutaraldehyde	Effective from pH 6.5 to 9.0 Stable up to 60°C
BV1528	Closed-circuit systems	Highly effective non-oxidising biocide Synergistic blend Effective against Pseudomonas & SRBs	Proprietary	Effective from pH 6.5 to 8.5 Stable up to 50°C
BV1532	Closed Systems	Flushing & system protection No copper stabiliser contact	ITA blend	Effective from pH 6.5 to 8.5 Stable up to 50°C
BV254	Open & Closed Systems	System protection Broad-spectrum product Effective vs SPBs	THPS	Effective from pH 3 to 10 Stable up to 60°C
BV529	Open & Closed Systems	System protection Rapid biocidal action Broad-spectrum activity Effective against Legionella spp	DBNPA
BV585 Pseudokill	Closed Systems	System Protection Biocidal flushing Low-toxicity Very stable Effective vs Pseudomonas spp	Proprietary	Use with high pH nitrite-based inhibitors Effective after 24–48 hrs contact pH 8.0–11.0 Stable up to 80°C Test kit available
BV595	Open & Closed Systems	Flushing & system protection Effective against NRBs	ITA/BNP blend	Effective from pH 6.5 to 8.5 Stable up to 50°C
BV595	Open Cooling Systems	Effective biocide & biodispersant Low-toxicity Effective vs Pseudomonas, Legionella, algae Biofilm removal & prevention	Concentrated THPS-based biocide & biodispersant	Concentrated formula Biodispersant enhances biocide
BV67	Open Cooling Systems	Broad-spectrum disinfectant & biocide Rapid action Effective vs Legionella Effective in heavily soiled systems Good surfactant properties	Quaternary ammonium chloride	Can also be used for surface disinfection & fogging
BV66	Open Cooling Systems Swimming Pools	Very effective algaecide	Polymeric quaternary ammonium compound	Algaecide

Manufacturing Biocides For Own-Label Partners

B & V Chemicals are biocide manufacturers, specialising in oxidising and non-oxidising water treatment products. We work with clients to create their own-label biocide products that they can self-brand or supply to their customers.

Premises that require biocides to manage microbial levels include wastewater services, water processing, closed circuit systems, recreational waters, open cooling systems, and operations working with drinking water.

Get in touch today!

Biocide Manufacturers In Europe

Our biocidal products are developed with full consideration of the Biocidal Products Regulation (BPR), also known as Regulation (EU) 528/2012. This legislation plays a key role in shaping the future of biocide use across water treatment and related industries. Our in-house regulatory experts ensure full compliance with BPR requirements, helping to protect both human health and the environment while supporting safe, effective product use across the UK, Europe, and beyond.

Finding The Right Biocide

Selecting the best biocide treatment for your cooling tower or water system involves several factors, such as:

Contact period
Concentration
Temperature
pH levels
Compatibility with materials
Efficacy against microbes
Cost-effectiveness
Type of system
Industry requirements

At B & V Chemicals, we’ll work with you to asses your current setup and introduce the most effective biocide water treatment solution.

Happy to answer your questions!

Frequently Asked Questions

What is the difference between oxidising and non-oxidising biocides?

Oxidising biocides add or remove oxygen to a microorganism’s cell structure to kill and remove it. Meanwhile, non-oxidising biocides don’t add or remove oxygen. Instead, they attack the wall of a cell, preventing it from reproducing and weakening it until it dies.

Which biocide is best for cooling towers?

Cooling towers predominantly use biocides to manage microbial growth and improve water quality. They also prevent scaling and corrosion in the tower, which could contaminate the water. Therefore, oxidising biocides like chlorine and bromine, and non-oxidising biocides like isothiazolinones and glutaraldehyde are ideal for cooling tower water treatments.

Are biocides safe for drinking water treatment?

When used correctly, biocides are a safe drinking water treatment. They are essential for disinfecting drinking water, killing harmful microorganisms, and keeping users safe. Common biocide chemicals used for drinking water include chlorine, chlorine dioxide, and hydrogen peroxide.

How often should biocides be applied in industrial systems?

Typically, water treatment biocides should be applied to maintain effective control of microbial growth. This typically involves cleaning systems on start-up and regularly as needed, preventing system contamination, and employing biocides either continuously or through a programmed shock dosing regimen.

Biocides For Water Treatment

We supply cooling tower biocide chemical solutions to help reduce harmful bacteria and support clean, reusable water.

What is Biocide Water Treatment?

Choosing The Right Biocide For Your System

Oxidising Biocides

Non-Oxidising Biocides

Manufacturing Biocides For Own-Label Partners

Biocide Manufacturers In Europe

Finding The Right Biocide

Frequently Asked Questions

Supply Partners

Chemical Treatments

Lab Analysis

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