PEF and extraction efficiency of cold pressed olive oil Pulsemaster supplies pulsed electric field PEF-systems to olive oil processing industry to make better olive oils i e an improvement of yield total Polyphenol content and aromas Pulsemaster has many years of unique experience with pulsed power technology and electroporation in ...
How does PEF work?
PEF processing involves the application of microsecond high voltage pulses in the order of 10 to 60 kV. The high voltage pulses applied induce pores in cell membranes, causing a loss of barrier function, leakage of intracellular content and loss of vitality. The treatment is applied continuously in a chamber ‒ a setup of multiple electrodes. While being pumped (liquids and semi viscous liquids) or transported (solids) through the treatment chamber, the product is exposed to the high voltage pulses. The required treatment time is less than a second. The pulses are applied at repetition rates of up to 1000 per second to allow sufficient treatment of all volume elements. Besides electrical parameters such as field strength and specific energy input, product temperature and product recipe also have an impact on treatment intensity.
Targeted
Pulsed Electric Field (PEF) processing or electroporation works by puncturing the cell membrane, whatever the size of cell. The process is targeted, gentle and clean. As a result, we measure dramatic increases in yield and the preservation of pigments, antioxidants and vitamins. PEF makes healthy products last longer.
A cell dimension can be 20-100 micrometer (µm), a bacteria dimension 2-10 micrometer (µm). Pores can have a size of 50-100 nanometer (nm) each. These small pores will be more stable pores when the cell membrane is subjected to more pulses.