The primary aim of using modified atmosphere for the packaging of commodities is to eliminate as much as possible the contact of food with oxygen, by creating an environment as protective as possible for the commodities to be conserved. The reaction of food to oxygen, i.e. oxidation, appears in different ways according to the composition of the commodity concerned: alteration of taste and scent, modification of color, rancidity, etc.
Consequently, packaging techniques in modified atmosphere have to take into account the nature and features of individual products to be packed, in order to create the right protective mix by exploiting not only nitrogen (generated on spot), but also gas additives, such as CO2.
The duration of a commodity conserved at a lower temperature (0-10°C) in modified atmosphere, with respect to the same commodity conserved at room temperature in air, is on average longer by 45% at worst, but may double for many other common commodities. Marvil proposes its nitrogen on-site generation units for any possible need.
The latter, differently from traditional supply methods, allow cutting costs for the rental and storage of containers (tanks or cylinders), as well as for filling or possibly returning them. Furthermore, in this way other duties are eliminated, such as monitoring storage levels and the danger of great reserve volumes at high pressures.
On-site Nitrogen generation is a simple and clever solution to economize, improve effectiveness and reduce space, to get the full control of the whole system by generating the wanted nitrogen quantity with the purity degree required for the process.