2. Industrial production conditions

Name: Unit operations. Chemical reaction engineering
SKU: TIP452WEB

2.1 Raw materials

The raw materials used must meet the nutritional requirements imposed by the growth and multiplication of yeast cells. If yeast is produced on a medium with a defined composition, based on glucose as a carbon substrate and ammonium and phosphorus salts as sources of nitrogen and phosphate, the culture medium will need to be supplemented with mineral salts, vitamins and trace elements. A typical medium composition is given in Plomb's patent [7] and is shown in table 1 . This medium is complex and costly, which is why sugar beet or cane molasses are the substrates of choice from an economic and technical point of view, and are currently the main...

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Economic data

The total baker's yeast market, expressed in 32% dry matter pressed yeast equivalent, is estimated at 2,500,000 t (2000 value), and is growing by around 2% a year.

This production represents large tonnages, which means :

major investments to create or expand production capacity. As fresh yeast has a limited lifespan, production must be decentralized...

References

(1) - GANCEDO (C.) - Cerevisia, - 21 (2) p. 29-36 (1996).
(2) - SPENCER (J.F.T.), SPENCER (D.M.), SMITH (AR. W.) - Yeast genetics, fundamental and applied aspects. - 533 p. Springer-Verlag New York (1983).
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