Unit II of Food Safety & Standards | B.Sc. Ag(hon's) 5th Semester Notes

Food Storage, Product Design, Hygiene and Sanitation in Food Service Establishments

1. Introduction

Food safety and quality management are essential components of modern food service systems. With increasing dependence on ready-to-eat foods and expansion of hospitality industries, maintaining proper food storage, hygienic handling, and sanitation practices has become crucial to safeguard public health.

Food service establishments such as restaurants, hotels, and catering units must follow scientific principles of food preservation and hygiene. Improper practices can lead to contamination, spoilage, and foodborne diseases.

2. Food Storage

2.1 Concept of Food Storage

Food storage refers to preserving food under controlled conditions to prevent spoilage and contamination, thereby extending shelf life and maintaining quality.

2.2 Principles of Food Storage

Temperature Control

• Refrigeration (0–5°C): Slows microbial growth
• Freezing (-18°C or below): Stops microbial activity
• Hot holding (>60°C): Prevents bacterial multiplication

Moisture Control

• Low moisture reduces microbial growth
• Airtight containers prevent humidity exposure

Oxygen Control

• Vacuum packaging reduces oxidation and microbial growth

Light Control

• Prevents degradation of vitamins and fats

2.3 Types of Food Storage

Dry Storage

• Used for cereals, pulses, spices
• Temperature: 10–21°C
• Humidity: Less than 60%

Refrigerated Storage

• Used for perishable foods like milk, vegetables, meat
• Temperature: 0–5°C

Frozen Storage

• Temperature: -18°C or lower
• Used for long-term preservation

Controlled Atmosphere Storage

• Used for fruits and vegetables
• Regulates oxygen and carbon dioxide levels

2.4 Storage Practices

• FIFO (First In First Out) principle
• Proper labeling (date, batch, expiry)
• Separation of raw and cooked foods
• Use of food-grade containers

2.5 Storage Hazards

• Cross-contamination
• Temperature abuse
• Pest infestation
• Chemical contamination

3. Product Design in Food Service

3.1 Concept

Product design refers to the development of food products that meet consumer expectations in terms of safety, quality, nutrition, and taste.

3.2 Objectives

• Ensure food safety
• Improve shelf life
• Enhance sensory quality
• Meet nutritional requirements

3.3 Factors Affecting Product Design

Consumer Preferences

Taste, texture, and cultural habits influence product design.

Nutritional Requirements

Focus on balanced and functional foods.

Processing Methods

Includes cooking, drying, freezing, and fermentation.

Packaging

Protects food and extends shelf life.

3.4 Steps in Product Development

1. Idea generation
2. Concept development
3. Prototype preparation
4. Sensory evaluation
5. Shelf-life testing
6. Commercialization

4. Hygiene and Sanitation

4.1 Definition

• Hygiene: Practices that maintain health
• Sanitation: Measures to ensure cleanliness

4.2 Importance

• Prevents foodborne diseases
• Maintains food quality
• Ensures regulatory compliance

4.3 Components

• Personal hygiene
• Equipment sanitation
• Environmental cleanliness
• Waste management
• Pest control

5. Sources of Contamination and Control

5.1 Types of Contamination

Biological

• Bacteria, viruses, fungi

Chemical

• Pesticides, cleaning agents

Physical

• Dust, glass, metal particles

5.2 Sources

• Raw materials
• Food handlers
• Equipment
• Environment
• Pests

5.3 Control Measures

• Good Hygiene Practices (GHP)
• HACCP implementation
• Temperature control
• Prevent cross-contamination

6. Waste Disposal

6.1 Types of Waste

• Organic waste
• Packaging waste
• Liquid waste

6.2 Methods

• Segregation
• Composting
• Recycling
• Incineration

6.3 Best Practices

• Use covered bins
• Regular disposal
• Maintain cleanliness

7. Pest and Rodent Control

7.1 Common Pests

• Rats and mice
• Flies and cockroaches

7.2 Control Measures

• Seal entry points
• Maintain sanitation
• Use traps and chemicals carefully
• Integrated Pest Management (IPM)

Food Safety Measures and Management Tools

1. Introduction to Food Safety

• Food safety ensures that food is free from biological, chemical, and physical hazards.
• It covers the entire food chain from production to consumption (farm to fork).
• Importance:
  • Prevents foodborne diseases caused by pathogens like Salmonella and E. coli.
  • Protects public health and ensures consumer safety.
  • Maintains compliance with regulatory standards.
  • Enhances consumer trust and market value.
• Types of hazards:
  • Biological: bacteria, viruses, parasites
  • Chemical: pesticides, toxins, heavy metals
  • Physical: glass, metal fragments, stones

2. Food Safety Management Systems (FSMS)

• Structured system to identify, evaluate, and control food safety hazards.
• Objectives:
  • Prevent contamination rather than detect it later.
  • Ensure consistent food production.
  • Maintain traceability and accountability.
• Key elements:
  • Hazard analysis
  • Documentation and records
  • Monitoring and verification
  • Corrective actions

3. Prerequisite Programs (PRPs)

• Basic environmental and operational conditions for safe food production.
• Components:
  • Facility design to prevent contamination
  • Equipment maintenance and calibration
  • Cleaning and sanitation schedules
  • Pest control systems
  • Waste management
  • Personnel hygiene practices
• Forms the foundation for HACCP implementation.

4. Operational PRPs (OPRPs)

• Specific control measures for significant hazards.
• Require strict monitoring and documentation.
• Examples:
  • Temperature control during storage
  • Allergen control
  • Metal detection systems

5. Sanitation Standard Operating Procedures (SSOPs)

• Documented procedures for cleaning and sanitation.
• Types:
  • Pre-operational SSOPs
  • Operational SSOPs
• Components:
  • Cleaning methods
  • Sanitizing agents
  • Frequency of cleaning
  • Responsible personnel
  • Verification procedures

6. Hazard Analysis and Critical Control Points (HACCP)

• Preventive system to identify and control hazards.
• Types of hazards:
  • Biological, chemical, and physical hazards
• Seven principles:
  1. Hazard analysis
  2. Identify Critical Control Points (CCPs)
  3. Set critical limits
  4. Monitoring procedures
  5. Corrective actions
  6. Verification
  7. Documentation

7. ISO Series in Food Safety

• ISO 22000 integrates HACCP and PRPs.
• ISO 9001 focuses on quality management.
• ISO 14001 deals with environmental management.
• Benefits:
  • Global recognition
  • Improved food safety
  • Enhanced customer trust

8. Total Quality Management (TQM)

• Holistic approach for continuous improvement and customer satisfaction.
• Components:
  • Customer focus
  • Employee involvement
  • Leadership commitment
  • Process approach
  • Continuous improvement

9. Kaizen

• Means "continuous improvement".
• Focuses on small, incremental improvements.
• Encourages employee participation.
• Helps reduce waste and improve efficiency.

10. Risk Analysis

• Scientific method to evaluate food safety risks.
• Components:
  • Risk Assessment
  • Risk Management
  • Risk Communication

11. Accreditation and Auditing

• Accreditation: Recognition of competence.
• Auditing: Evaluation of processes.
• Types of audits:
  • Internal
  • External
  • Third-party

12. Water Analysis

• Ensures water quality used in food processing.
• Parameters:
  • Physical: turbidity, temperature
  • Chemical: pH, heavy metals
  • Microbiological: coliforms, pathogens

13. Surface Sanitation

• Cleaning and disinfecting food contact surfaces.
• Steps:
  1. Cleaning
  2. Rinsing
  3. Sanitizing
  4. Drying
• Sanitizers: Chlorine, iodine, quaternary ammonium compounds.

14. Personal Hygiene

• Maintaining cleanliness to prevent contamination.
• Practices:
  • Hand washing
  • Protective clothing
  • Health check-ups

15. Integration of Food Safety Systems

• PRPs provide foundation.
• HACCP controls hazards.
• ISO ensures system management.
• TQM and Kaizen ensure continuous improvement.