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High Pressure Homogenization (or homogenisation), HPH. Homogenization is a term used in many fields denoting a process that makes a mixture the same or uniform throughout. High pressure homogenization (HPH) is the application of high shear, impact and cavitation created by the passing of a liquid emulsion or suspension through a homogenising valve under high pressure. As the fluid under pressure passes through the homogenising valve the fluid is accelerated and the potential energy of the fluid at pressure is converted through high shear, impact and cavitation. The result of the high energy transfer into the product is to mix product and reduce particle size. Examples of use of the technique include oil in water emulsions, liposomes and cell rupture. Please click here for last page.
HPH itself can be sub-dived as pressure used range 5 MPa (750 psi, 50 bar) to 400 MPa (58000 psi, 4000 bar) to apply some demarcation SFP apply the following definition:
Low/Medium pressure homogenization 5 MPa (750 psi, 50 bar) to 35MPa (5000 psi, 350 bar) typical of Dairy industry applications
Medium pressure homogenisation 35 MPa (5000 psi, 350 bar) to 70MPa (10000 psi, 700 bar) various applications.
High pressure homogenization 70 MPa (10000 psi, 700 bar) to 175MPa (25000 psi, 1750 bar) typical of cell rupture, oil in water emulsions, liposomes.
Ultra high pressure homogenization 175 MPa (25000 psi, 1750 bar) to 400MPa (58000 psi, 4000 bar) typical for novel food products
