Food Processing Plant Hygiene, Sanitation, and Safety
Scope of the domain
This domain tests plant layout, zoning, cleaning and sanitising, personal hygiene, pest control, waste handling and worker safety in a food processing plant.
Core rules and concepts
- Plant layout should separate high-risk and low-risk areas and control movement of people, air, water and waste.
- Cleaning removes soil; sanitising reduces microorganisms on a clean surface. Sanitiser applied to a dirty surface is ineffective.
- CIP (cleaning-in-place) circulates cleaning solutions through pipelines and tanks; COP cleans dismantled parts in a tank.
- Personal hygiene includes clean uniforms, handwashing, hair cover, no jewellery and exclusion of ill workers.
- Pest control needs proofing, inspection, baiting and waste control, not only spraying.
- Safety hazards include wet floors, hot surfaces, rotating machinery, chemicals, electrical faults and fire.
Worked example
A stainless-steel table has been used for raw meat. State the correct cleaning sequence. Reasoning: first remove visible soil by dry cleaning and pre-rinsing. Then apply detergent with mechanical action to lift fat and protein. Rinse thoroughly, apply a food-safe sanitiser at the correct concentration and contact time, and allow air drying. Sanitiser must not be applied before detergent, because soil shields microorganisms. The sequence is: pre-clean → detergent → rinse → sanitise → air dry.
Traps that cost marks
- Sanitising before cleaning; soil prevents sanitiser contact.
- Mixing cleaning chemicals, which can release toxic gases.
- Using high-pressure water near electrical panels or open product.
- Treating pest control as spraying only; proofing and waste control are essential.