Cleaning Digest 2

Types of Cleanliness

Why Clean

• Enhancing the life of the surface
• Disease Prevention
• Hygiene
• Occupational Safety
• Image / Status
• Aesthetic appearance

What to Clean

The cleanability of the surface is a primary consideration in evaluating cleaning effectiveness.

Surface Characteristics

Thorough examination is required before starting any cleaning activity :-

• Surface Composition
• Surface Finish
• Surface Condition

Soil

Cleaning is the removal of dust, dirt, foreign matter, tarnish & stains from various surfaces with the aid of certain cleaning agents and equipment. Dust, dirt, and foreign matter deposited on a surface are referred to as soil.

Soiling :-

• soluble in water (sugars, some starches, most salts);
• soluble in acid (limestone and most mineral deposits);
soluble in alkali (protein, fat emulsions);
• soluble in water, alkali, or acid.

Soil Classification

• Fat-based Soils
• Protein-based Soils
• Carbohydrate-based Soils
• Mineral Salt-based Soils
• Microbiological Films
• Lubricating Greases and Oils
• Other Insoluble Soils

When to Clean

Various Types of cleaning and frequency of conducting the cleaning activity.

• Maintenance Cleaning
• Intermediate Cleaning
• Deep Cleaning

Selection Criteria for cleaning

• Construction of the surface and its sensitivity
• Size of the surface to be cleaned
• Cost of cleaning
• Location and accessibility
• Transportation of material and machines
• Permissible Time to clean.
• Environmental consideration

Cleaning Methods

Equipment can be categorised with regard to cleaning method as follows:

Manual Cleaning

Using manual cleaning material and Aid.

Mechanical Cleaning

Using machines in different areas and surfaces.

Cleaning-in-place ( CIP - Requires no disassembly or partial disassembly ) & Clean-out-of-Place (COP)

Can be partially disassembled and cleaned in specialized COP pressure tanks. These are mainly used in food processing and Pharma Industry.