Cleaning in kitchens, canteens and food businesses is regulated by law. Here are the hygiene zones, HACCP's seven principles and where cleaning fits as a prerequisite programme, two-step cleaning and disinfection of food contact surfaces, allergens and documented self-inspection.
Introduction
When working with food, cleaning is not just a service — it is part of food safety and is controlled by legislation. The EU Food Hygiene Regulation (EC No. 852/2004) requires that food businesses keep premises and equipment clean and work according to HACCP principles, and that they conduct self-inspection which the Danish Food Authority can check. For a cleaning technician in commercial services, it is therefore crucial to know the system around cleaning — not just the method itself.
Hygiene zones: keep clean and dirty separate
A food production area is divided into zones according to how sensitive the food is to contamination. The purpose is to prevent cross-contamination — transferring microorganisms, allergens or dirt from a contaminated zone to a clean one. Colour-coded equipment (see the article on colour coding) is the practical way to keep the zones separate.
| Zone | Examples | Cleaning considerations |
|---|---|---|
| Unclean zone. | Goods receipt, waste, floor drain, toilet/staff facilities. | Highest contamination level; own, separate equipment — must never be taken to clean zones. |
| Raw materials zone | Handling of unprocessed raw materials (meat, vegetables, fish). | Separate raw and prepared; frequent cleaning and possible disinfection of surfaces and tools. |
| Clean zone / food contact surfaces | Preparation, plating, packaging; cutting boards, tables, machines that touch food. | Strictest: two-step cleaning and disinfection; dedicated, clean equipment. |
Cleaning and disinfection of food contact surfaces — two stages
On surfaces that touch food, one step is not enough. You FIRST clean (remove visible dirt, grease and food residue with a suitable agent and rinse), then DISINFECT where necessary with an agent suitable for food contact — followed by rinsing/drying according to the product's instructions. The order matters because organic material (grease, food residue) reduces the disinfectant's effectiveness. The disinfectant must also be approved for use on food-contact surfaces and used in the correct concentration and contact time (see the disinfection article).
HACCP's seven principles
HACCP (Hazard Analysis and Critical Control Points) is an international system for managing food safety. It is based on seven principles, which come from Codex Alimentarius and are part of EU legislation. Cleaning is rarely itself a critical control point, but it is one of the prerequisite programmes (basic programmes) on which HACCP is built — if basic hygiene is not in order, the system cannot function.
| No. | Principle |
|---|---|
| 1 | Risk analysis — map the hazards (biological, chemical, physical) in the process. |
| 2 | Establish the critical control points (CCP) — where the hazard can be managed. |
| 3 | Set critical limits for each CCP (e.g. a temperature/time). |
| 4 | Monitor each CCP continuously. |
| 5 | Establish corrective actions when a limit is exceeded. |
| 6 | Verify — check that the system works. |
| 7 | Document — before records so it can be verified. |
For cleaning, this means especially principles 4 and 7: cleaning must be performed according to a plan (what, where, how often, with what), and it must be documented — who cleaned where and when — so both the company and the authority can see that the prerequisites programme is followed.
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