Case study
Protection of edible oil and plants with nitrogen

Protection of edible oil and plants with nitrogen

Oxygen and other volatile contaminants are a critical issue in oil production, as they can damage the quality of the liquid foodstuff, as well as compromise the efficiency of processing plants. To prevent this from happening, it is crucial for oil mills to implement technological solutions capable of replacing O2 with inert atmosphere. The synergy between SIAD and the oil mills featured in this case study enable it to overcome critical issues by adopting flexible, cost-effective, safe and fully automated plants.

The Client

Requesting SIAD’s intervention is an Italian oil mill that specializes in the production of 100% Italian extra virgin olive oil. Critical in this situation are the well-established experience in the field plus the tradition of olive oil art combined with advanced technologies, as well as an ethical approach, based on respect for the environment, and a continuous search for the highest product quality.

Its requirement

Oil is a perishable and chemically oxidizable food liquid. Protecting it from degradation while protecting its high quality was the objective of the oil mill. In addition to this main requirement, there is also the need to preserve processing plants from all those phenomena, related to the presence of oxygen, that can compromise their integrity and proper functioning.

SIAD’s intervention.

The solution proposed by SIAD optimizes all the most problematic stages of the oil production process, in order to eliminate critical issues. This is achieved by exploiting the inerting capabilities of gases, particularly nitrogen.

Pulmoning counteracts rancidity, preserving the aroma of products and increasing the useful life of products. It consists of replacing the oxygen present in the head spaces of storage vessels with nitrogen. Stripping removes dissolved gases in the food liquid plus unwanted volatiles. Through the line stripper, gas in the form of micro bubbles can be introduced. These bind to molecules of oxygen and other volatile contaminants, “ripping” them out of the liquid and purifying it. The benefits are undisputed. These techniques result in:

  • Optimizing all the processes
  • Preserving the plants
  • Counteracting the phenomenon of rancidity
  • Preserving the aroma of products
  • Increasing the life of products
  • Ensure the maximum safety of operators and work environments

Inerting is also practiced during oil bottling, going to eliminate oxygen between the liquid and the cap, with additional benefits on food product quality and preservation.

The results obtained

The solution proposed by SIAD met all the expectations of the oil mill. The use of nitrogen enabled it to create inert atmospheres in all the delicate manufacturing processes. Specifically, through the use of line strippers, there is an all-natural purification operation, which involves no introduction of chemical additives and leads to the following advantages: the greater durability of stored food products, the best qualities achievable for oils and greases, as well as the elimination of oxygen-related problems on plants.

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SIAD Group, a century of history in gas production

Among Italy’s leading chemical groups, SIAD is a leader in the production and commercialization of the full range of industrial, specialty, and medicinal gases and related services. The business extends to sectors in synergy with that of gases, including Wine, Food and Beverage.