Riso Morgante

AEDÌ S.r.l.
Via Ghislarengo, 12
13035 LENTA (VC)
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Company

Processing

The stages of the industrial process to transform rough rice (paddy) into edible rice are:

  • cleaning and hulling;
  • whitening and polishing and optical sorting;
  • product packing;

The rice transformation process starts with the cleaning of the product and sifting out the debris like straw, mould, stones, seeds other than rice etc.; this operation is carried out by a special machine called the TARARA. The next stage is the removal of the siliceous bracts (husk) by means of the chafing movement of the rice huller, at this stage we have brown or semi-milled rice but as the grains are prone to breakage this operation must be carried out with care..

The hulling machine is familiarly known as the "sbramino". The next machine in line is the "paddy" which separates the semi-milled grains from the grains that are still in the husk, these are returned to the hulling machine. The only way to preserve this kind of rice for long periods is at low temperature or in vacuum packs as the chaff and the bran are still present on the grains making them easily perishable. A by-product of semi-milled rice known as "green grain" (immature grains and/or smaller grains), used especially in the zootechnics industry, is obtained by calibrating special sieves. Great care must be taken during the hulling process to prevent the grains from breaking..

Whitening and polishing removes the chaff, the gem and the bran:
the grains are conveyed into a space in between two concentric cones (the inner rotating cone has an abrasive surface);
the chafing movement removes the first and second layers (chaff and gem); further chafing also removes the bran.
At the end of the polishing stage the white rice is separated from the broken grains by means of honeycomb separators..

An optical sorter sorts the grains even further according to colour; the rice passes under colour sensitive photocells that detect grains of a different colour to that of the preset standard, the coloured grains are eliminated by a jet of compressed air. Colouring defects often occur during milling stages, excess heat causes the "peck" phenomenon..

Packing