Abstract: Systems and processes are described for sanitizing a food product with ozone gas. The ozone gas is generated using a low pressure, low volume ozone gas generator and is delivered to a fluid injector. The fluid injector receives high pressure carrier fluid from a carrier fluid source and causes the ozone to be entrained in a stream of carrier fluid. The entrainment is created by passing the carrier fluid through a venturi diffuser inside the injector which creates a negative pressure in the sanitizing fluid line, thus drawing the sanitizing fluid into the carrier fluid and creating a highly homogenized fluid jet. The fluid jet is then injected into a container which contains a food product to be sanitized by the ozone. The container may also be provided with a mixing paddle to vigorously mix the food product while the ozone/carrier fluid jet is injected into the food product, which further ensures that the food product is contacted with sanitizing ozone gas.

Abstract: A linear freezer for cooling and/or chilling and/or crust freezing and/or freezing various products, said freezer using carbon dioxide or nitrogen. The freezer comprises means to balance the exhausted cold gas between the entry and exit openings and sucking means, to extract the exhausted cold gas at said both entry and exit openings, with no substantial variation of flowrate of the exhausted cold gas than that generated from the enclosure without said sucking means.