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Antinutritional factor: how to eliminate it from legumes?




Why are legumes considered high energy foods? Because they consist of 50% starch, an important carbohydrate. However, despite the high nutritional value typical of legumes, they are also known to contain antinutritional factors: antitriptics. The presence of these reduces the bioavailability of various components, thus lowering the digestibility of proteins and the absorptionof minerals naturally present in legumes. 

How can these antinutritional factors be removed from freshly harvested legumes? There are several methods, such as cooking, roasting or extrusion. All of these bring the grains to sufficiently high temperatures to transform the antinutritional factors and break down their effectiveness. 

The cereal roasting phase - following the drying phase - is the process that allows these elements to be definitively neutralised. If drying enables every farmer to secure his harvest, roasting improves the quality of the grain, increasing its palatability and taste.

To find out in detail how Mecmar's dryers and roasters work, and to discover how these plants eliminate antinutritional factors from legumes, continue reading!

Curb the aflatoxin problem with Mecmar solutions

Aflatoxins are one of the most dangerous categories of mycotoxins for your livestock. If ingested through feed, they can compromise the health of animals and the quality of food products derived from them. Therefore, in order to avoid this, it is essential to dry and storage cereals immediately after harvesting. 

During the drying process, excess water that impregnates the grain is expelled from the grain. Once this stage is complete, the grain will leave the mobile or tower dryer dry and clean, with a moisture content of no more than 13-15%, thus ensuring maximum safety during storage.

If the slow drying process removes toxins (carcinogenic elements) from the grain, thus preventing contamination of the grains, it is then finally possible to move on to the roasting stage. It is through this that the grain is heated to a temperature of 110 °C. This results in a cereal with a crunchier texture, which is therefore more appreciated by both humans and animals.

Did you know that with Mecmar's range of electric roasting machines you can roast and cool the grain in the same plant? The output product is roasted (antinutritional factors are completely eliminated) and already cooled to a temperature set at 20°C, ready for storage or further processing.

A wholesome meal for your farm: remove the antinutritional factor from soya

The high nutritional value of soya - due to the presence of oils and derived proteins - makes this seed particularly valuable. In order to effectively process the soya bean immediately after its harvest, it is freed from all those antinutritional factors that can compromise its quality.

An example of an antinutritional factor contained within soya is the enzyme urease. How to remove it effectively? Through roasting! Through this process, the antinutritional components are reduced, while the best nutrients and fats are maintained at stable levels. 

Mecmar roasters also allow the soya bean to remain intact. In this way, less soya is needed to obtain the same calories in the diet of the animal to be fed. 

Which roaster model should you choose to remove the antinutritional factor from your cereals?

All Mecmar roasting machines ensure uniform treatment of all types of grain. Speed and safety are two distinctive traits that characterise Mecmar's grain roasting plants. But specifically which path does the grain follow inside the plant?

The grains enter the roasting machine still at room temperature (approximately 20°C) and then encounter a flow of hot air, which, by heating the grains, makes it possible to obtain a perfectly homogenous roasting process, without the risk of damaging the treated grain.

Depending on the type of animal (cattle, pigs, poultry), size and number to be fed Mecmar has the right roaster for you: there are 5 models of roasting machines you can choose from. The T5 and T10 versions are suitable for small to medium-sized farms, while the T20, T50 and T100 models are ideal for medium to large farms, as they can roast up to 6 tonnes of product per hour.

Diesel or electric grain roaster? Which one should you choose? We discuss this in our article dedicated to the Mecmar electric cereal roaster.

Choosing Mecmar machines with the aim of eliminating the most harmful antinutritional factors from cereals means relying on some of the most innovative roasting solutions. The maximum efficiency of these roasting machines is guaranteed by their compact design and the fact that the equipment is mounted on a mobile frame, which allows the machine to be easily positioned as required.

In conclusion

In this article, we have looked at the main aspects that characterise Mecmar dryers and, above all, roasters. It is precisely the latter that represent the solution that will allow you to remove the antinutritional factors present in legumes after the harvesting and drying phase. Although this is the main reason why more and more farmers are choosing Mecmar equipment, it is not the only reason why it is important to roast cereals:

  • it keeps the nutritional value of cereals high
  • it makes cereal-based foods more appetising and inviting;
  • it increases the level of protein bypass, which is indispensable in the diet of ruminants if the energy and protein deficit of a herd is to be contained, by about 10 per cent.

Still not sure which Mecmar solution is best for you? Please contact us to find out. Our team will be happy to answer all your questions and queries.

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