Cleaning and Sanitation in the Food Industry: Food Safety, GMP, HACCP, Verification and Audit Compliance

Introduction

Cleaning and sanitation are among the most important control measures in the food industry. No food safety system can work properly if equipment, food contact surfaces, utensils, drains, floors, storage areas and processing zones are not cleaned and sanitized correctly.

In food manufacturing, cleaning and sanitation are not only routine housekeeping activities. They are technical food safety controls linked with GMP, GHP, HACCP, ISO 22000, FSSC 22000, BRCGS, regulatory compliance, customer confidence and product quality.

A surface may look clean, but it can still carry microorganisms, allergens, biofilm or chemical residues. This is why every food business must understand the science, method, verification and documentation behind cleaning and sanitation.

The main message is simple:

Cleaning removes contamination. Sanitation reduces microbial risk. Verification proves the system is working.

For food technologists, QA officers, sanitation supervisors, production teams, food safety inspectors, auditors and students, cleaning and sanitation must be treated as a professional food safety system, not as a casual washing activity.

What Is Cleaning?

Cleaning means the removal of food residues, grease, soil, dust, allergens, chemical residues, biofilm and visible or invisible contamination from food contact and non food contact surfaces.

In simple words, cleaning removes the material that can support microbial growth or contaminate food.

Common materials removed during cleaning include:

1. Food particles
2. Oil and grease
3. Protein residues
4. Starch and sugar residues
5. Dust and powder
6. Mineral scale
7. Allergen residues
8. Biofilm
9. Chemical residues
10. Foreign matter

Cleaning must always come before sanitation. If a surface is dirty, sanitizer cannot work effectively.

This is one of the most important rules in food hygiene:

Never sanitize a dirty surface.

What Is Sanitation?

Sanitation means reducing microorganisms on properly cleaned food contact and non food contact surfaces to an acceptable safe level.

Sanitation does not replace cleaning. It works only after effective cleaning.

Organic matter, grease, protein, dust and biofilm can reduce or neutralize sanitizer performance. This is one of the most common mistakes in food factories: applying sanitizer on dirty surfaces and assuming the area is safe.

A strong sanitation program must control:

1. Correct sanitizer type
2. Correct concentration
3. Correct contact time
4. Correct surface coverage
5. Correct application method
6. Correct verification
7. Correct documentation

Sanitation is effective only when cleaning has already removed the soil load.

Cleaning vs Sanitation: The Key Difference

Cleaning and sanitation are related, but they are not the same.

Cleaning answers this question

Has soil, residue, allergen, grease, dust or visible contamination been removed?

Sanitation answers this question

Have microorganisms been reduced to an acceptable level after cleaning?

Cleaning prepares the surface.

Sanitation controls microbial risk.

Verification confirms whether both were effective.

A food factory needs all three.

Why Cleaning and Sanitation Matter in Food Safety

Cleaning and sanitation protect food from biological, chemical, physical and allergen related hazards.

They are essential for controlling foodborne pathogens and spoilage organisms such as:

1. Salmonella spp.
2. Listeria monocytogenes
3. Escherichia coli
4. Staphylococcus aureus
5. Bacillus cereus
6. Campylobacter
7. Cronobacter
8. Yeasts and molds
9. Spoilage bacteria

Poor sanitation can lead to product contamination, food poisoning, reduced shelf life, customer complaints, recalls, legal action and brand damage.

A strong sanitation program supports:

1. Foodborne illness prevention
2. Cross contamination control
3. Allergen control
4. Biofilm prevention
5. Foreign matter control
6. Pest prevention
7. Shelf life protection
8. Product quality and sensory stability
9. Audit readiness
10. Regulatory compliance
11. Customer trust

Cleaning and sanitation are not optional support activities. They are core food safety controls.

Types of Soil Found in Food Plants

Different food soils require different cleaning approaches. One chemical cannot remove every type of soil effectively.

Protein Residues

Protein residues are commonly found in meat, milk, egg, fish, poultry and cereal processing areas.

These soils usually need alkaline detergents or enzymatic cleaners.

Fat and Oil Residues

Fat and oil residues come from butter, cream, vegetable oils, animal fats, shortening, frying operations and greasy equipment.

These require alkaline cleaners, degreasers, emulsifiers and suitable temperature control.

Carbohydrate and Starch Residues

Starch, flour, dough, sugar, syrup, rice and bakery residues may need water based cleaning, alkaline cleaners and enzymes where required.

Mineral Scale

Mineral scale comes from hard water, milk stone, calcium deposits, magnesium salts and processing water.

Acid cleaners are normally used to remove mineral deposits.

Burnt or Baked Residues

Burnt sugar, baked protein, caramelized residues and cooked fats require stronger alkaline cleaning, heat, soaking and mechanical action.

Biofilm

Biofilm is one of the most serious sanitation challenges.

It requires deep cleaning, mechanical action, chemical rotation, equipment dismantling and verification through swabs and trend analysis.

Allergen Residues

Allergen residues require validated cleaning, allergen specific testing, proper production sequencing, line clearance and documented verification.

Dust and Powder Residues

Dry materials such as flour, spices, cocoa powder, milk powder, starch and grains may require dry cleaning before wet cleaning.

Unnecessary water in dry areas can increase microbial risk.

The correct cleaning method depends on soil type, surface material, water quality, equipment design and food safety risk.

Cleaning Methods Used in the Food Industry

Food factories use different cleaning methods based on product type, equipment design, risk level and processing environment.

Manual Cleaning

Manual cleaning is used for small equipment, utensils, tables, removable parts and difficult to reach surfaces.

It allows direct attention to problem areas, but it depends heavily on operator training and supervision.

Clean in Place, CIP

CIP is used for closed systems such as pipelines, tanks, pasteurizers and fillers.

It cleans internal surfaces without dismantling equipment.

Critical controls include:

1. Flow rate
2. Turbulence
3. Temperature
4. Chemical concentration
5. Contact time
6. Conductivity
7. Final rinse quality

CIP records must be reviewed before equipment is released for production.

Clean out of Place, COP

COP is used when parts are removed and cleaned separately in a tank or washing system.

It is useful for valves, fittings, small parts and dismantled components.

Foam Cleaning

Foam cleaning is useful for open surfaces, walls, floors, external equipment and large processing areas.

Foam increases chemical contact time and improves visibility during application.

Spray Cleaning

Spray cleaning is common for general equipment and surface cleaning.

However, high pressure spraying must be controlled because it can spread microorganisms, allergens and soil particles.

Soak Cleaning

Soak cleaning is useful for heavily soiled tools, trays, parts and utensils.

It helps loosen soil before scrubbing or rinsing.

Dry Cleaning

Dry cleaning is important in low moisture foods, powders, grains, bakery ingredients, spices, nuts and dry blending areas.

Brushes, scrapers, vacuum systems and controlled dry methods are used to reduce moisture related contamination.

Wet Cleaning

Wet cleaning uses water and detergents. It is suitable for many food production areas, but moisture must be controlled to avoid microbial growth.

Steam and Heat Cleaning

Steam and heat cleaning can support cleaning and sanitation where suitable, but they must be used carefully to avoid condensation, surface damage and ineffective contact.

Cleaning Chemistry

Cleaning chemicals must be selected according to soil type, surface compatibility, water quality and process risk.

Common cleaning chemicals include:

1. Alkaline detergents for protein, fat and organic soil
2. Acid detergents for mineral scale and milk stone
3. Neutral detergents for light duty cleaning and delicate surfaces
4. Chlorinated alkaline cleaners for heavy organic soil and stain control
5. Enzymatic cleaners for protein, starch and biofilm related residues
6. Degreasers for oil and fat removal
7. Chelating agents to bind minerals and improve detergent performance
8. Surfactants to reduce surface tension and improve wetting
9. Anti foam agents for CIP and tank systems
10. Water conditioners to improve cleaning effectiveness

Important factors affecting cleaning performance include:

1. Correct concentration
2. Water temperature
3. Contact time
4. Mechanical action
5. Water hardness
6. pH
7. Soil load
8. Surface accessibility
9. Chemical compatibility
10. Equipment design

Chemical compatibility is very important. Some chemicals may damage aluminum, rubber, plastic, seals, gaskets or certain food grade surfaces if used incorrectly.

Sanitation Chemistry

Sanitizers are used after cleaning to reduce microorganisms to acceptable levels. The sanitizer must be approved for food industry use and applied at the correct concentration and contact time.

Chlorine Based Compounds

Chlorine compounds are broad spectrum and commonly used, but they are sensitive to organic matter. They may also cause corrosion if misused.

Quaternary Ammonium Compounds

Quaternary ammonium compounds are useful on floors, walls and non food contact surfaces in many applications.

They are stable and easy to use, but residue control and compatibility must be considered.

Peracetic Acid

Peracetic acid is effective against many bacteria, yeasts, molds and spores.

It works well in many food environments but can be corrosive at higher concentrations.

Hydrogen Peroxide

Hydrogen peroxide is used in certain sanitation applications and packaging systems.

It requires proper control because concentration, contact time and compatibility matter.

Iodophors

Iodophors are effective in specific applications but may stain surfaces and are affected by pH and organic matter.

Alcohol Based Sanitizers

Alcohol sanitizers are useful for small tools, gloves and quick drying applications.

They are flammable and less suitable for heavily soiled areas.

Ozone

Ozone can be used where technically suitable. It is a strong oxidizer but requires careful control, safety measures and proper system design.

Hot Water and Steam Sanitation

Hot water and steam can be effective where equipment is designed for heat. Proper temperature and contact time are essential.

UV Sanitation

UV can be useful in specific controlled applications, but it works only on exposed surfaces and has limited penetration.

It should not be treated as a universal sanitation method.

Correct Cleaning and Sanitation Sequence

A professional cleaning and sanitation process should follow a defined sequence.

1. Remove gross debris by dry cleaning where suitable.
2. Pre rinse with potable water.
3. Apply detergent at the correct concentration.
4. Allow the required contact time.
5. Scrub or apply mechanical action.
6. Rinse properly with potable water.
7. Conduct visual inspection.
8. Apply approved sanitizer.
9. Maintain required sanitizer contact time.
10. Drain and air dry where applicable.
11. Reassemble equipment hygienically.
12. Verify cleaning effectiveness.
13. Record the activity.
14. Release equipment for production only after approval.

Skipping any step can reduce the effectiveness of the entire sanitation program.

Technical Cleaning Principle

Cleaning effectiveness depends on a balance of several technical factors.

1. Time
2. Temperature
3. Chemical action
4. Mechanical action
5. Water quality
6. Surface accessibility
7. Soil type
8. Soil load
9. Equipment design
10. Operator skill
11. Verification result

If one factor is weak, another factor may need stronger control. For example, lower temperature may require longer contact time or stronger mechanical action.

However, food safety limits must never be compromised.

Food Contact and Non Food Contact Surfaces

Cleaning programs must cover both food contact and non food contact surfaces.

Food Contact Surfaces

Food contact surfaces include:

1. Tables
2. Conveyors
3. Cutters
4. Mixers
5. Fillers
6. Pipelines
7. Tanks
8. Utensils
9. Trays
10. Packaging machine parts that directly touch food

Non Food Contact Surfaces

Non food contact surfaces include:

1. Floors
2. Drains
3. Walls
4. Ceilings
5. Equipment frames
6. Cold rooms
7. Handles
8. Control panels
9. Cleaning tools
10. Employee tools

Cleaning tools themselves can become contamination sources if they are not cleaned, sanitized, dried and stored correctly.

Hygienic Design Requirements

Good cleaning is difficult when equipment is poorly designed. Hygienic design reduces product buildup, water accumulation, hidden contamination and biofilm formation.

Food equipment should have:

1. Smooth cleanable surfaces
2. No cracks, pits or rough welds
3. No dead ends
4. No hollow bodies
5. Proper drainage
6. Sloped surfaces where required
7. Easy dismantling
8. No product buildup points
9. No water accumulation
10. Food grade materials
11. Compatible seals and gaskets
12. Separation of raw and ready to eat zones
13. Dedicated tools for high risk areas
14. Color coding system
15. Controlled traffic flow

Good hygienic design makes cleaning easier, faster, safer and more reliable.

Master Sanitation Schedule

A Master Sanitation Schedule is a key document for audit readiness. It defines what must be cleaned, how often, by whom and how effectiveness will be checked.

A strong Master Sanitation Schedule should include:

1. Area or equipment
2. Risk category
3. Cleaning frequency
4. Cleaning method
5. Chemical name
6. Chemical concentration
7. Water temperature
8. Contact time
9. Sanitizer name
10. Sanitizer concentration
11. Responsible person
12. Verification method
13. Acceptance criteria
14. Corrective action
15. Supervisor approval
16. Record reference

The schedule should be risk based. High risk areas, allergen areas, wet zones, drains and ready to eat areas need stronger control.

SSOP Requirements

Sanitation Standard Operating Procedures, known as SSOPs, describe exactly how cleaning and sanitation must be performed.

A proper SSOP should include:

1. Purpose
2. Scope
3. Responsibility
4. Required tools
5. Required chemicals
6. Chemical dilution method
7. PPE requirements
8. Stepwise cleaning method
9. Sanitizer application method
10. Contact time
11. Inspection points
12. Verification method
13. Corrective action
14. Record keeping
15. Pre operational inspection
16. Post cleaning release procedure

SSOPs must be practical, clear and understandable for workers. They should be available at the workplace and followed consistently.

Cleaning Validation and Sanitation Verification

Validation and verification are often confused, but both are essential.

Validation

Validation proves that the cleaning and sanitation method is scientifically capable of controlling the identified hazard.

It answers this question:

Can this cleaning and sanitation method work?

Verification

Verification confirms that the method was performed correctly and achieved the required result.

It answers this question:

Did the cleaning and sanitation work this time?

Common verification tools include:

1. Visual inspection
2. ATP swabbing
3. Protein residue swabs
4. Allergen swabs
5. Microbiological surface swabs
6. Environmental monitoring
7. Listeria monitoring in high risk areas
8. Final rinse water testing
9. pH checks
10. Conductivity checks in CIP systems
11. Temperature records
12. Chemical concentration test strips
13. Titration methods
14. Trend analysis

Visual inspection alone is not enough for high risk operations. Scientific verification provides stronger confidence.

Acceptance Criteria for Cleaning Verification

Acceptance criteria must be defined before cleaning verification starts.

They should be based on risk assessment, product type, legal requirements, customer standards and validation data.

Examples of acceptance criteria include:

1. No visible soil
2. No product residue
3. No standing water where not acceptable
4. Correct detergent concentration
5. Correct sanitizer concentration
6. Correct sanitizer contact time
7. ATP result within internal limit
8. Microbiological swab within defined limit
9. Allergen test negative where required
10. CIP final rinse conductivity within target range
11. Supervisor approval before startup

Without clear acceptance criteria, cleaning results become subjective and difficult to defend during audits.

Biofilm Control in Food Factories

Biofilm is a structured microbial community attached to a surface and protected by extracellular polymeric substances. Once established, biofilm becomes difficult to remove and may continuously contaminate food contact areas.

Common biofilm risk areas include:

1. Drains
2. Gaskets
3. Valves
4. Dead ends
5. Filler heads
6. Slicers
7. Conveyors
8. Floor wall junctions
9. Wet zones
10. Cracks and damaged surfaces

Biofilm control requires:

1. Routine deep cleaning
2. Equipment dismantling
3. Mechanical scrubbing
4. Chemical rotation
5. Enzymatic cleaning where suitable
6. Drain hygiene programs
7. Environmental monitoring
8. Surface repair
9. Trend analysis

Biofilm control is especially important in wet processing areas and ready to eat food environments.

Allergen Cleaning

Allergen cleaning is critical when shared equipment is used for allergen and non allergen products.

A simple visual check is not enough.

Effective allergen control includes:

1. Validated allergen cleaning
2. Production sequencing
3. Dedicated tools where possible
4. Dry cleaning for powder allergens where suitable
5. Wet cleaning when required
6. Shared equipment controls
7. Changeover cleaning
8. Label control linkage
9. Allergen swab testing
10. Protein testing
11. Employee training
12. Record keeping
13. Final line clearance before non allergen production

Allergen cleaning failures can cause serious consumer health risks and product recalls.

CIP Technical Control

CIP systems require strong technical control because internal surfaces are not always visible.

A typical CIP cycle may include:

1. Pre rinse
2. Caustic wash
3. Intermediate rinse
4. Acid wash where required
5. Final rinse
6. Sanitizer cycle where required

Critical CIP parameters include:

1. Flow rate
2. Turbulence
3. Temperature
4. Chemical concentration
5. Conductivity
6. Time
7. Return temperature
8. Spray ball coverage
9. Dead leg control
10. Valve integrity
11. Final rinse verification
12. CIP chart or digital record review

A CIP record should be reviewed carefully before equipment is released for production.

Dry Cleaning Controls

Dry cleaning is very important in low moisture foods, powders, spices, grains, nuts, bakery ingredients and dry blending areas.

In dry areas, unnecessary water can create serious microbial risks. Salmonella control is especially important in low moisture food environments.

Dry cleaning controls include:

1. Avoid unnecessary water use.
2. Use vacuum systems where suitable.
3. Use dry brushes and scrapers.
4. Control compressed air use.
5. Prevent dust spread.
6. Keep tools dry.
7. Use alcohol based sanitation only where suitable.
8. Use dry steam only where technically justified.
9. Verify through environmental monitoring.

Dry areas require a special mindset. More water does not always mean better cleaning.

Common Cleaning and Sanitation Mistakes

Many sanitation failures happen because of simple but serious mistakes.

Common mistakes include:

1. Sanitizing dirty surfaces
2. Wrong chemical dilution
3. No concentration verification
4. Insufficient contact time
5. Using cold water when hot water is required
6. Poor rinsing
7. Leaving chemical residues on surfaces
8. Mixing incompatible chemicals
9. Using high pressure near exposed food
10. Ignoring drains
11. Ignoring gaskets and hidden parts
12. Using dirty cleaning tools
13. No line clearance
14. No record review
15. No corrective action after failed swab

These mistakes can compromise food safety, audit performance and consumer protection.

Chemical Safety During Cleaning

Cleaning chemicals can be hazardous if handled incorrectly. Chemical safety must be part of every sanitation program.

Important chemical safety controls include:

1. PPE use
2. Gloves
3. Goggles
4. Face shield where required
5. Apron
6. Boots
7. Respiratory protection where required
8. SDS availability
9. Chemical labeling
10. Approved storage
11. Secondary containment
12. Correct dilution order
13. Ventilation
14. Emergency shower and eyewash
15. First aid arrangements
16. Spill control
17. Lockout and tagout before equipment cleaning

Important warning:

Never mix chlorine with acid. Never mix chemicals unless approved by a trained and authorized person.

Chemical safety protects workers, equipment, food contact surfaces and final products.

Documentation Required for Audit Readiness

Food safety auditors expect cleaning and sanitation activities to be documented properly. If it is not recorded, it becomes difficult to prove.

Important sanitation records include:

1. Master Sanitation Schedule
2. SSOPs
3. Daily cleaning checklist
4. Pre operational inspection record
5. Chemical concentration log
6. Sanitizer verification record
7. ATP record
8. Microbiological swab record
9. Allergen cleaning verification record
10. CIP record
11. Corrective action report
12. Training record
13. Chemical inventory
14. SDS file
15. Maintenance link record
16. Pest control link record
17. Internal audit record

Records should be complete, accurate, signed, dated, reviewed and stored properly.

Training Requirements

Workers are the most important part of a sanitation system. Even the best chemical or procedure can fail if people are not trained.

Training should cover:

1. Basic food hygiene
2. Cleaning sequence
3. Chemical handling
4. Sanitizer use
5. Contact time
6. Tool color coding
7. Allergen control
8. Biofilm awareness
9. CIP controls
10. Dry cleaning controls
11. PPE
12. Emergency response
13. Record completion
14. Supervisor verification

Training should be repeated regularly and verified through observation, questioning and performance checks.

Audit Focus Areas

During food safety audits, cleaning and sanitation programs are reviewed in detail.

Auditors commonly check:

1. Is the cleaning schedule risk based?
2. Are SSOPs available and followed?
3. Are chemicals approved for food industry use?
4. Are concentrations verified?
5. Are records complete?
6. Are failed results investigated?
7. Are corrective actions documented?
8. Are employees trained?
9. Is equipment hygienically designed?
10. Are sanitation trends reviewed?
11. Is sanitation linked with HACCP, allergen control, pest control and environmental monitoring?

A strong sanitation system is not only about cleaning. It is about proof, control, training, verification and continuous improvement.

Cleaning and Sanitation Checklist for Food Businesses

Before releasing any area or equipment for production, ask:

1. Was gross soil removed?
2. Was detergent used at correct concentration?
3. Was required contact time followed?
4. Was mechanical action applied where needed?
5. Was rinsing done properly?
6. Was the surface visually inspected?
7. Was sanitizer applied after cleaning?
8. Was sanitizer concentration verified?
9. Was sanitizer contact time achieved?
10. Was ATP or swab verification required?
11. Were allergen checks required?
12. Was equipment reassembled hygienically?
13. Was the record completed?
14. Was the area released by an authorized person?

If any answer is doubtful, the area should not be released without QA or sanitation supervisor review.

Practical Example: Dairy Processing Line

In a dairy plant, milk residues can leave protein, fat and mineral deposits inside pipelines, tanks and pasteurizers.

A strong sanitation system may include:

1. Pre rinse to remove loose milk residues
2. Caustic wash for fat and protein soil
3. Intermediate rinse
4. Acid wash for mineral scale and milk stone
5. Final rinse
6. Sanitizer cycle where required
7. Conductivity and temperature record review
8. Microbiological or ATP verification where needed
9. QA release before production

If CIP time, temperature, flow or chemical concentration is weak, internal surfaces may remain contaminated even if the system looks normal from outside.

Practical Example: Bakery and Dry Powder Area

In bakery or dry powder areas, flour dust, starch, cocoa powder or spice powder can accumulate on surfaces and equipment.

Unnecessary wet cleaning can create moisture pockets and increase microbial risk.

A good dry cleaning program may include:

1. Controlled dry brushing
2. Vacuum cleaning
3. Dust control
4. Tool segregation
5. Allergen control where needed
6. Environmental monitoring
7. Limited wet cleaning only when justified

Dry areas require careful control because water can turn dry residues into sticky soil and may support microbial growth.

Practical Example: Ready to Eat Food Area

Ready to eat areas need stronger sanitation because food may not receive another kill step before consumption.

Important controls include:

1. Strict zoning
2. Dedicated tools
3. Frequent sanitation
4. Drain hygiene
5. Listeria environmental monitoring
6. Pre operational inspection
7. Surface swabbing
8. Employee hygiene control
9. Traffic flow control
10. Corrective action after positive findings

In ready to eat food production, sanitation failure can directly affect consumer safety.

Final Technical Message

Cleaning and sanitation are not just housekeeping tasks.

They are food safety controls that protect products from microorganisms, allergens, biofilm, chemical residues, foreign matter and cross contamination.

A strong sanitation system is based on:

Right method, right chemical, right concentration, right time, right temperature, right verification and right record.

Conclusion

Cleaning and sanitation are the foundation of food safety in every food business.

Effective cleaning removes soil, food residues, allergens and contamination sources. Effective sanitation reduces microbial risk to an acceptable level. Verification proves that the system is working.

For food technologists, QA officers, production teams, sanitation supervisors and food safety students, understanding cleaning and sanitation is not optional. It is a core professional skill.

A food factory can only produce safe food when its cleaning and sanitation program is controlled, verified, documented and continuously improved.

The strongest lesson is simple:

Cleaning removes the source of contamination. Sanitation controls microbial risk. Verification proves the system is working. Together, they protect food safety, product quality, consumer health and brand trust.

Author Note

Written by Mahtab Khan, Food Technology professional with experience in food safety, regulatory compliance, food testing, quality control, inspection and food sector operations. This article is prepared for food technology students, QA officers, sanitation supervisors, production teams, food safety inspectors, auditors and food industry professionals.

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FAQ Section

What is cleaning in the food industry?

Cleaning is the removal of food residues, grease, dust, allergens, biofilm and contamination from food contact and non food contact surfaces.

What is sanitation in the food industry?

Sanitation is the reduction of microorganisms on properly cleaned surfaces to an acceptable safe level.

What is the difference between cleaning and sanitation?

Cleaning removes soil and residues. Sanitation reduces microorganisms. Cleaning must happen before sanitation.

Why is sanitation important in food safety?

Sanitation helps prevent contamination, foodborne illness, spoilage, product recalls, customer complaints and regulatory action.

Can sanitizer work on a dirty surface?

No. Organic matter, grease, protein, dust and biofilm can reduce sanitizer effectiveness. The surface must be cleaned first.

What is an SSOP?

SSOP means Sanitation Standard Operating Procedure. It explains how cleaning and sanitation must be performed, verified and recorded.

What is CIP cleaning?

CIP means Clean in Place. It is used for closed systems such as tanks, pipelines, pasteurizers and fillers without dismantling the equipment.

Why is dry cleaning important in food factories?

Dry cleaning is important in low moisture foods, powders, spices, grains, nuts and bakery areas because unnecessary water can increase microbial risk.

What is cleaning validation?

Cleaning validation proves that a cleaning method is capable of removing soil, allergens or contamination to an acceptable level.

What is cleaning verification?

Cleaning verification confirms that cleaning was done correctly and achieved the required result for a specific cleaning activity.

References

1. Codex Alimentarius Commission. General Principles of Food Hygiene, CXC 1.
2. ISO 22000. Food Safety Management Systems.
3. FSSC 22000 Scheme Requirements.
4. BRCGS Global Standard Food Safety.
5. U.S. FDA Current Good Manufacturing Practice, 21 CFR Part 117.
6. U.S. FDA Food Code.
7. European Union Regulation EC No. 852/2004 on food hygiene.
8. EHEDG hygienic design guidance.
9. 3A Sanitary Standards.
10. Campden BRI hygiene and sanitation guidance.
11. ICMSF, Microorganisms in Foods.
12. AOAC International methods where applicable.
13. ISO microbiological testing methods where applicable.