International Journal of Agricultural Engineering

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High Hydrostatic Pressure Food Processing:An Overview


Affiliations
1 Department of Processing and Food Engineering, Punjab Agricultural University, Ludhiana (Punjab), India
2 Department of Agricultural Engineering, College of Horticulture (RVSAU), Mandsaur (M.P.), India
     

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High hydrostatic pressure processing (HHPP or HPP or HHP or Pascalization) is a non-thermal food preservation and processing technology that can inactivate food borne pathogens, spoilage micro-organisms and unfavourable enzymes without significantly altering organoleptic properties and nutritional value of foods. The pressure transmission is uniform and quasi-instantaneous during HHP regardless of the size and geometry of food, rendering the technology more effective and energy efficient. HPP utilizes intense pressure (about 400-600 MPa or 58,000-87,000 psi) at chilled or mild process temperatures (<45°C). Pressure treatment can be used to process both liquid and high-moisture-content solid foods. Although lethal to microorganisms, pressure treatment does not break covalent bonds and has a minimal effect on food chemistry. Thus, HPP provides a means for retaining food quality while avoiding the need for excessive thermal treatments or chemical preservatives. In addition to lengthening the shelf-life of food products, HHP can modify functional properties of components such as proteins, which in turn can lead to the development of new products. In light of these reasons, the use of HHP for processing food has resurged with the industry’s renewed interest in its application. Within the last decade, a number of companies have introduced commercial grade high pressure systems thus providing food processors an opportunity to preserve foods and offering a process of choice for applications where alternative processing methods would adversely impact product quality.

Keywords

Food Preservation, Microbial Inactivation, New Technologies, Non-Thermal Processes.
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  • High Hydrostatic Pressure Food Processing:An Overview

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Authors

Rohit Sharma
Department of Processing and Food Engineering, Punjab Agricultural University, Ludhiana (Punjab), India
Khursheed Alam Khan
Department of Agricultural Engineering, College of Horticulture (RVSAU), Mandsaur (M.P.), India

Abstract


High hydrostatic pressure processing (HHPP or HPP or HHP or Pascalization) is a non-thermal food preservation and processing technology that can inactivate food borne pathogens, spoilage micro-organisms and unfavourable enzymes without significantly altering organoleptic properties and nutritional value of foods. The pressure transmission is uniform and quasi-instantaneous during HHP regardless of the size and geometry of food, rendering the technology more effective and energy efficient. HPP utilizes intense pressure (about 400-600 MPa or 58,000-87,000 psi) at chilled or mild process temperatures (<45°C). Pressure treatment can be used to process both liquid and high-moisture-content solid foods. Although lethal to microorganisms, pressure treatment does not break covalent bonds and has a minimal effect on food chemistry. Thus, HPP provides a means for retaining food quality while avoiding the need for excessive thermal treatments or chemical preservatives. In addition to lengthening the shelf-life of food products, HHP can modify functional properties of components such as proteins, which in turn can lead to the development of new products. In light of these reasons, the use of HHP for processing food has resurged with the industry’s renewed interest in its application. Within the last decade, a number of companies have introduced commercial grade high pressure systems thus providing food processors an opportunity to preserve foods and offering a process of choice for applications where alternative processing methods would adversely impact product quality.

Keywords


Food Preservation, Microbial Inactivation, New Technologies, Non-Thermal Processes.

References