Nuts & Seeds



Log 5 Conterflow Nut Roaster

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The Log5 Counterflow nut roasting technology was originally developed in the late seventies by a German Company called Lehmann.  Roughly 10 years ago or so Lehmann was acquired by the Royal Duyvis Wiener group and today we market all our nut processing technologies under the ‘Log5’ brand. 

How it Works

The premise of the Lehmann counterflow roaster is quite simple and straightforward: it is a vertical roaster where the product is transported from the top to the bottom and the roasting air flows in ‘counter current’ to the product from the bottom to the top. 


The Log5 Counterflow nut roaster works exceptionally well on both blanched and red skin peanuts as well as on all tree nuts, including almonds, pistachios, hazelnuts, amd others

Years in The Business

Happy Students

Offered Courses

Studio Locations

Wiener Wiecomix


Gentle Roasting

Both solids and liquids can be fed into the Wiecomix

400 Liter Holding Tank

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350kg / Batch Maximum


steel belt conveying

2 roll refiner

5 roll refiner

2+5 roll refiner

dry conching