High pressure treatments were achieved using a laboratory pilot scale HHP equipment with a maximum operating pressure of 1000 MPa consisting of an operation high pressure unit with a pressure intensifier, a high pressure vessel of 1.5 l in volume and a multivessel system consisting of six vessels of 45 ml capacity each. All high pressure vessels were surrounded by a liquid circulating jacket connected to a heating–cooling system. The pressure transmitting fluid used was polyglycol ISO viscosity class VG 15