Clean in Place (CIP) is widely used across food and beverage manufacturing where production equipment needs to be cleaned regularly and efficiently in situ. Rather than manually dismantling equipment and cleaning individual components, cleaning solutions are circulated through the processing system. This can include pipework, tanks, pumps, valves, heat exchangers and other suitable components.
The Importance of CIP Parameters
CIP effectiveness depends on several interacting factors.
Time-The chemical must remain in contact with the relevant surfaces for the specified period.
Temperature-The correct temperature can influence cleaning performance and chemical activity.
Chemical Concentration-The product needs to be used at the specified concentration. Under-dosing can compromise performance, while excessive dosing can increase chemical consumption and operational costs.
Mechanical Action-Flow and turbulence help provide mechanical cleaning action within pipes and equipment.
Soil Type-The chemistry needs to be matched to the contamination being removed.
These parameters are often considered together when developing a validated CIP process.
CIP Chemical Dosing
Accurate dosing is important for consistent CIP performance.
Depending on the installation, chemical dosing can be controlled using automated dosing systems, conductivity monitoring, concentration measurement or other site-specific controls.
Correct dosing can help:
- Maintain consistent chemical concentration
- Reduce chemical waste
- Improve repeatability
- Support CIP verification
- Improve operational efficiency
Chemical dosing systems should be correctly configured for the particular product and CIP installation.
CIP Verification
CIP processes should be appropriately monitored and verified as part of the site's food safety and hygiene management system.
Depending on the process, verification can include monitoring:
- Chemical concentration
- Temperature
- Flow
- Contact time
- Conductivity
- Rinse quality
- ATP
- Microbiological results
- Visual inspection where applicable
The appropriate verification approach depends on the individual process and risk assessment.
CIP Chemicals & Food Safety
Effective CIP is an important part of maintaining hygienic food production.
Poorly cleaned processing equipment can allow food residues and microorganisms to remain within the system, potentially contributing to contamination and product quality issues.
A suitable CIP programme should therefore be developed around the site's:
- HACCP system
- Equipment design
- Food products
- Cleaning requirements
- Chemical specifications
- Validation procedures
- Environmental conditions
- Microbiological risks
