Food Processing Slides (2)

Food Processing

  • Refers to the procedures that modify food from its natural state.

Definition of Processed Food

  • According to the Dietary Guidelines Advisory Committee (2010) and the US FDA (2011):

    • Food processing encompasses any procedure that alters food from its original state.

    • The intensity of the processing indicates the extent of changes made to raw materials.

Categories of Food Processing

  • Minimally-Processed: Foods that undergo minimal changes from their raw state.

  • Processed: Foods that have been treated to enhance their flavor, safety, or shelf-life.

  • Ultra-Processed: Foods that contain industrial ingredients, often with little to no whole food components.

  • Food Security & Food Safety: Aspects that ensure the availability and safety of the food supply.

  • FAO & WHO: International organizations involved in food standards (Food and Agriculture Organization, World Health Organization).

  • Codex: A collection of internationally recognized standards and guidelines for food safety.

Specific Types of Processing

  • Fermentation:

    • A specialized process involving microorganisms.

    • Results in the reduction of pH and may lead to coagulation.

    • Alters both the chemical composition and nutritional value of food.

Current Trends in Food Production

  • Involves:

    • Industrial-scale operations.

    • Emphasis on safe, high-quality, and healthy food production.

    • Consumer’s positive perception of benefits in value, consistency, and convenience from the food supply.

    • Contrastingly, there's a negative view on "processed foods" among some consumers.

Consumer Choices in Processed Foods

  • Connection between processing and meal preparation time:

    • High processing leads to convenience, such as ready-made meals (e.g., spaghetti bolognese).

    • Choices may be influenced by consumer behavior and habits.

Reality of Consumer Demand

  • The landscape of food technology has greatly expanded choices for consumers.

  • Necessity for selective eating to ensure health while enjoying the conveniences provided by processed foods.

Processed Foods for Emergency Situations

  • Examples include:

    • Canned beans, chickpeas, lentils, fish, meats and meat dishes.

    • Canned fruits in natural juice and vegetables.

    • Nuts, seed mixes, dry cereals, and muesli bars.

    • Non-perishable items like grainy crackers and shelf-stable breads.

    • Powdered or UHT milk items and bottled drinks.

Methods of Food Preservation

  • Techniques include:

    • Refrigeration and Freezing.

    • Canning: Sealing foods in jars to prevent spoilage.

    • Irradiation: Using radiation to kill pathogens.

    • Dehydration and Freeze-drying: Removing moisture to prolong shelf-life.

    • Salting and Pickling: Preserving foods through high salt concentrations or vinegar.

    • Pasteurization: Heating to kill bacteria.

    • Fermentation and Chemical Preservation: Utilizing microorganisms or chemicals to preserve food.

  • Purpose of Preservation:

    • To slow down or kill disease-causing bacteria in food.

Historical Overview: Father of Canning

  • Nicolas Appert (1749 - 1841):

    • Awarded for developing methods of food preservation in the early 1800s.

    • Established the first commercial cannery and patented his method.

    • His methods involved sealing food in glass bottles and boiling them, paving the way for modern canning.

Today's Canning Techniques

  • Thermal Processing:

    • Utilizes equipment like retorts for batch or continuous canning.

    • Emphasis on time and temperature control during processing.

Alternatives to Thermal Processing

  • Non-thermal methods include:

    • Ultraviolet Light, Pulsed Electric Fields, Cold Plasma, High Pressure Processing, Ozone.

High Pressure Processing (HPP)

  • Non-thermal method applied uniformly to food products.

  • Maintains the nutritional and raw characteristics of foods.

  • Energy-efficient compared to heat-based methods.

    • Affects molecular interactions but preserves flavors and nutrients.

Consumer Perceptions and Trends

  • Demand for clean labels and safe foods without negative effects of processing.

  • Awareness of HPP is low among consumers, but those informed tend to respond positively.

Understanding Pressure in Context

  • Comparisons of pressure levels:

    • 0.03 MPa: Sea level

    • 500 MPa: Comparable to deep-sea pressures.

Alternative Food Technologies

  • Resources for more information on HPP can be found through links provided.

Food Waste Management

  • Food technology and additives can significantly reduce food waste by enhancing shelf life.

Innovative Processing

  • Exploring techniques to reduce food waste through innovative processing solutions.

  • Empowering consumers to engage in reducing waste in their kitchens.