ChloroKlean BPR Compliant Chlorine Dioxide Disinfectant - UK Supplier

Chlorine Dioxide vs UV for Food and Beverage CIP

UV (ultraviolet) disinfection inactivates microorganisms by damaging their DNA at the point the water passes through the UV chamber. It produces no disinfection by-products and is highly effective on clear, low-turbidity water for pathogens including Cryptosporidium. However, UV has three structural limitations for food and beverage CIP (Clean-in-Place): it provides no residual downstream of the chamber, it only treats water passing directly through the lamp (the 'shadow effect' means no protection on equipment surfaces or in dead legs), and it does not penetrate or remove existing biofilm inside pipework and tanks. Chlorine dioxide (ClO₂) is a chemical biocide that maintains a measurable residual throughout the CIP loop, penetrates biofilm in pipework, and acts on equipment surfaces during cleaning cycles. ClO₂ at 0.1-0.5 ppm is BPR-compliant for PT4 (food and feed area) applications under the UK GB BPR. The two technologies are often complementary: UV for incoming process water, ClO₂ for CIP loops and surface sanitisation.

Author
Key Advantage of ClO₂
Provides measurable residual throughout CIP loops, penetrates biofilm in pipework, and acts on equipment surfaces - UV does none of these.
By-products
ClO₂ produces no THMs or HAAs at typical dose rates. UV produces no chemical by-products but can generate small amounts of nitrite from nitrate in some source waters.
pH Range
ClO₂ effective at pH 4-10. UV unaffected by pH but blocked by turbidity, suspended solids, and biofilm shadowing.
Regulatory Sources
EHEDG Guidelines, BRCGS Food Safety Standard, WHO Drinking-water Guidelines, EU BPR 528/2012 PT4, FSA UK guidance, FDA 21 CFR 178.1010
UK Compliance
ChloroKlean Plus L20 is BPR-compliant for PT4 (food and feed area hygiene) applications under UK GB BPR. UV systems must comply with relevant water treatment standards.
Comparison Guide

Chlorine Dioxide vs UV

UV is excellent point-of-use disinfection for clear water - but it cannot reach equipment surfaces, leaves no residual, and cannot break down biofilm inside CIP loops. Compare ClO₂ and UV for food and beverage hygiene.

ClO₂

Chlorine Dioxide

  • Sustained residual through entire CIP loop
  • Removes existing biofilm in pipework
  • Works on equipment surfaces, valves, and dead legs
  • BPR-compliant PT4 for food and feed areas
  • No shadow effect - reaches everywhere water flows
UV

UV (Ultraviolet)

  • No chemical residual or by-products at point of use
  • Effective against Cryptosporidium and most pathogens
  • No residual protection downstream of lamp
  • Cannot penetrate or remove biofilm on equipment
  • Effectiveness drops with turbidity and lamp fouling

Detailed Comparison

Detailed comparison of chlorine dioxide versus uv
FeatureChlorine DioxideUV
Residual Disinfection

Yes

Maintains 0.1-0.5 ppm through CIP loop

No

Effective only inside the UV chamber

Biofilm Removal

Excellent

Penetrates and breaks down EPS matrix

None

Cannot reach biofilm inside pipework

Surface Sanitisation

Yes

Contact with tank walls, valves, gaskets

No

Only treats water passing through lamp

Dead Leg Treatment

Yes

Residual reaches stagnant zones

No

No flow through lamp = no protection

Effect of Turbidity

Minimal

Works in coloured and turbid product water

Severe

Suspended solids block UV transmission

Capital Cost

Low

Metering pump + storage tank

Moderate

UV chamber + ballast + monitoring

Operating Cost

Low chemical use

Sub-ppm dosing rates

Lamp replacement

Annual lamp + quartz sleeve cleaning

Cryptosporidium Efficacy

Yes (at dose)

Effective at higher doses

Excellent

Low UV dose inactivates oocysts

BPR Status

PT4 Compliant

Authorised for food and feed area hygiene

Out of BPR scope

Physical process, not a biocidal product

When to Choose Each

Choose Chlorine Dioxide When:

  • You need to break down existing biofilm in CIP loops
  • Equipment surfaces, valves, or dead legs need sanitisation
  • A measurable residual is required for HACCP / BRCGS compliance
  • Process water has variable turbidity or organic content
  • Food or feed area hygiene under BPR PT4 is required
  • Replacing peracetic acid or sodium hypochlorite without raising corrosion

Consider UV When:

  • Final polishing of clear, pre-filtered bottled water
  • Point-of-use disinfection where no residual is wanted in product
  • Cryptosporidium-specific risk in incoming municipal supply
  • Low-flow inline disinfection of process water with no biofilm history
  • Used in series with a chemical biocide for surfaces
"UV is brilliant at what it does - which is killing planktonic organisms in clear water as they pass through the lamp. The problem in food and beverage CIP is that pathogens are rarely planktonic; they're sitting in biofilm on the inside of a heat exchanger, a valve seat, or a dead leg in a CIP return line. UV cannot get there. Chlorine dioxide can. We routinely see plants pair UV for incoming water with ChloroKlean for the CIP loop itself, and the microbiology results speak for themselves."
GO

Gavin Owen, Managing Director, ChloroKlean

BPR-compliant disinfection specialist

Why Choose ChloroKlean Plus L20

If you're considering switching to chlorine dioxide, ChloroKlean Plus L20 is purpose-built for industrial and commercial applications.

BPR PT4 Compliant

Authorised under UK GB BPR for food and feed area hygiene. Approved for use on surfaces in contact with food and beverage at specified residual concentrations.

Penetrates CIP Biofilm

Regenerative ClO₂ chemistry penetrates extracellular polymeric substance (EPS) matrix in CIP loops, where UV cannot reach. Documented in poultry and vegetable processing case studies.

Reduces Chemical Load

Field-proven 99% chemical reduction in poultry processing versus sodium hypochlorite. Lower dose rates than PAA, no corrosion of stainless steel CIP equipment.

Regulatory and Scientific References

This comparison is informed by the following authoritative sources. Always refer to the latest published guidance.

EHEDG Guidelines
European Hygienic Engineering and Design Group

Hygienic Equipment Design and CIP

EHEDG sets the European standard for hygienic design of food processing equipment, including CIP system design and biocide selection.

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BRCGS Food Safety
Brand Reputation through Compliance Global Standards

Global Standard Food Safety Issue 9

BRCGS requires documented cleaning and disinfection procedures, including microbiological verification - both UV and ClO₂ can support compliance when used appropriately.

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WHO Guidelines
World Health Organization (WHO)

Guidelines for Drinking-water Quality (UV Disinfection)

WHO guidance on UV disinfection acknowledges its lack of residual effect and recommends a downstream chemical residual for distributed systems.

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FDA 21 CFR 178.1010
US Food and Drug Administration

Sanitizing Solutions

FDA permits chlorine dioxide as a no-rinse sanitiser on food-contact surfaces at up to 200 ppm under specified conditions.

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EU BPR PT4
European Chemicals Agency (ECHA)

Biocidal Products Regulation - Product Type 4 (Food and Feed)

PT4 covers biocides used in food and feed areas including dairy processing, beverage production, and CIP systems. Chlorine dioxide is an approved active substance.

View source

Frequently Asked Questions

Add Residual Protection to Your CIP Loops

ChloroKlean Plus L20 delivers BPR PT4-compliant chlorine dioxide for CIP and process water disinfection. Works where UV cannot reach.