Deodorising

The deodorising phase of edible oils, whether continuous or semi-continuous deodorising, is a process that follows the bleaching. This step is of high value, both technically and organoleptically, with a fundamental importance in terms of compliance. Indeed, deodorisation is essential to stabilise edible oils from a chemical point of view, but it is also essential because free fatty acids are removed, so the deodorised oil has bland taste and is odourless. Therefore, deodorisation is a crucial step for the marketability of edible oils.

Basically, deodorising of edible oils involves 4 stages:

• Heating: the oil is brought to the final deodorising temperature, which allows the volatile elements to be removed.
• Vacuum: a deep vacuum is created with a proper vacuum system to reduce the boiling point and prevent oxidation of the product.
• Steam stripping: superheated dry steam is injected to strip volatile components.
• Cooling: after deodorising, the oil is rapidly cooled under vacuum to ensure stability.

Depending on the production needs, companies use continuous deodorising or semi-continuous deodorising.

It all depends on the type and quantity of edible oils to be processed.

If only one type of edible oil needs to be refined at a time, in large quantities, continuous deodorising is considered the most commonly adopted process.

Semi-continuous deodorising is, instead, an ideal process for companies that need to process multiple types of edible vegetable oils in varying quantities. Semi-continuous deodorisation is a batch system: each batch is processed in each tray of the deodoriser, where the tower consists of several compartments or trays. These compartments enable sequential deodorisation, improving efficiency and reducing contamination between batches.

TECHNOLOGY ADVANTAGES

Whether it is continuous deodorising or semi-continuous deodorising of edible oils, both types of deodorisation are processes that significantly improve the quality of crude oils, making them much more stable, pleasant and compliant with market standards for their organoleptic properties, but also meeting the requirements of international regulations. In this way, the best possible results can be achieved from both soft oils (such as soybean, canola, sunflower and others) and hard oils (such as palm oil or coconut oil).

The quality of the end products is highly depending on how the process is carried out, regardless of whether it is continuous or semi-continuous. In terms of cost-effectiveness, however, continuous deodorising systems have simpler handling and lower energy consumption than semi-continuous deodorising.

In general, we could list the main advantages attributable to both technologies as follows:

• Ability to process crude oils with high FFA, as high as 6%
• Ability to obtain high purity FAD via enrichment section
• Resolution to prevent and mitigate 3-MCPD & GE
• Ability to achieve low Trans Fatty Acid (TFA) limits during processing
• Meet market requirements for colour, taste, and odour
• Long shell life, stability and oxidative achievement for refined oil

FURTHER ADVANTAGES OF CMB TECHNOLOGY

Continuous and semi-continuous deodorising processes for edible oils are critical stages in vegetable oil refining, demanding meticulous attention to detail. To ensure excellent functioning in these crucial steps, is essential a high-level combination of:

– Construction materials

– Engineering

– Process management to perform excellently

Choosing CMB as your partner means tapping into years of dedicated studies and rigorous testing, guaranteeing optimal results.

Top quality materials, state of the art design and assembling techniques implemented by CMB in the course of the years, contribute significantly to cost optimization and superior outcomes. However, the expertise offered by CMB’s Global Technical Sales team is truly invaluable, providing fundamental guidance to achieve the highest quality product.

The precise temperatures, pressures, and processing times within CMB plants are the direct result of continuous research and experimentation, meticulously tailored to various plant configurations and crude oil types.

By entrusting your deodorising needs to CMB, you gain a significant advantage rooted in our extensive experience and profound know-how. This translates into tangible benefits, including:

• Reliability and ease of operation
• Availability of different types of vacuum systems
• Complete processing under deep vacuum conditions
• Higher yield and reduced operating costs
• Competitive investment cost
• Minimized effluent and waste

Don’t leave your critical deodorising processes to chance. Partner with CMB and leverage our deep-seated experience and proven know-how to achieve unparalleled results. If you seek a dependable partner and require further information, do not hesitate to contact us without obligation. A knowledgeable CMB consultant will promptly reach out to you. Write to us now at: info@cmb.it . Let our years of expertise guide you to the best solution for your Company.

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