Mecmar S.p.A.

Today, Mecmar is a benchmark for the production of mobile and tower dryers and grain roasters, not only in many European countries but also overseas.

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Case studies

T20 mobile roaster for service expansion

Customer Subcontractor
Cereals Soy, broad bean, rapeseed, wheat, lupine
Need Offer cereal roasting service
Model T20
Hourly yield 2ton/h of soybean

The case

A Danish subcontractor would like to extend his range of services by inserting toasting in his catalogue.

To this end, to purchase the roaster most appropriate for the needs of possible customers, he performs some technical and market analyses including:

  • The daily ration of food for one head of livestock generally includes about 1kg of soybean or lupin
  • A typical dairy farmer manages an average of 100 dairy cows and needs about 100kg of soybean a day Dried soybean can be stocked an average of 20 days. This allows the dairy farmer to always have a fresh dried product available
  • The local livestock holdings in the territory are medium/small-sized. For most of these farms, installing a soybean toasting system would be too costly and out of their reach. These farms could take advantage of the ideal solution provided by the toasting service offered by the subcontractor performed at their farm itself.

Considering the large number of dairy farmers in the area, the Subcontactor decides that this is the category of the market to apply for. The quicker the toasting service is carried out, the more profitable it will be.

Toasting cereals and beans

Soybeans can be toasted like other products such as fava beans, rapeseed, wheat, lupin, mainly aimed at making them more digestible (by deactivating the trypsin inhibitors), improving taste and absorbing proteins. 

This makes it possible to meet the different requirements of farms based on the type of animals reared (monogastric or polygastric), on the diet and, last but not least, on how much they can spend.

By comparing the main nutritional elements of cereals and beans (Table 1), we can see that soybean is the most nutritious. While other types of grains (e.g. oats, wheat, barley, etc.) can be considered secondary in the diet of these animals as they have a low vitamin content though contributing to supply energy, fibres and minerals. Peas can also be used to complete the amino-acids offered by soybeans with their 22% of protein, while rapeseed is mainly a favourite due to its high energy content.


Table 1 – Comparison of the nutritional elements of some cereal and beans Source: USDA Food Composition Databases

The solution adopted

The customer needs a Grain Roaster which is both mobile, quick in the drying process and efficient to make this toasting service available to several farms. He chose the MECMAR T20 roaster capable of producing approximately 2tons/h of soybean, to satisfy about 2 – 3 customers a day according to their geographical distances.

The roaster is equipped with a towing drawbar, 2 axles with wheels and parking feet to allow for fast and easy mobility.

To make it easy to switch on the roaster, it has a Plug&play system with a 380V three-phase electrical socket inserted in the electric panel to supply the necessary 12kW for its operation. The diesel oil burner was designed so as to be able to connect the fuel exhaust pipe to any type of tank.

Further accessories were applied to the loading and unloading systems of the roaster to provide maximum flexibility of use in relation to the different environments in which it operates:

  • the loading auger requires a safe and stable position during transport and needs to be quickly and easily connected when it reaches destination to be able to load from the three sides: front, left and right. The auger was also designed to perform preliminary cleaning eliminating sand, leaves and pieces of straw which are unwanted both inside the roaster and in the toasted product.
  • The discharge auger is mounted on a rotary flange which unloads the product on a 180° span to find the best position to discharge the toasted product, whether a silo, trailer or on the ground.



Published data refer to corn and are calculated with mathematical models that use clean and ripe products and in normal operating conditions with 120°C drying air temperature and one hour cool-down time. Please do not hesitate to contact the nearest Mecmar dealer for more information.

Under our policy of continuous improvement, we reserve the right to change specifications provided without prior notice.


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