Food or edible material: processes – compositions – and products – Processes – Preparation of product which is dry in final form
Patent
1988-06-16
1989-09-19
Corbin, Arthur L.
Food or edible material: processes, compositions, and products
Processes
Preparation of product which is dry in final form
127 66, 426481, 426489, 426637, A23L 1216
Patent
active
048679984
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a process for manufacturing potato fibers and to potato fibers manufactured in the process.
Potatoes are a natural product which, in addition to being an important staple food, also are the raw material for manufacturing starch and alcohol. In conventional manufacture of starch from potatoes, the by-products potato pulp, potato juice and potato water are obtained besides starch. The potato juice is the liquid content of the potatoes, and the potato water is diluted potato juice obtained in the starch manufacturing process. The potato pulp is the fiber mass and part of the potato juice, usually about 20%, and normally has a total solids content (TS) of about 13-15%.
In starch manufacture, starch is the desired main product, and potato juice and potato pump are by-products which cannot simply be passed to waste since they can cause waste disposal and environmental problems. A further problem are the large amounts of potato juice and potato pulp. Up to now, the by-products have been taken care of in that potato juice is used as fertiliser and potato pulp as cattle wet fodder. However, this solution cannot be considered optimal since the starch manufacturer's costs for getting rid of the potato pulp are unfavourably related to the profit obtainable. Moreover, potato pulp is rather difficult to handle because of its highly viscous and sticky nature.
As will be appreciated, it would be a great step forward if one could provide a process for refining potato pulp to a product which is more readily handled and does not cause waste disposal or environmental problems and also has a higher economic value.
A quite different problem is that, in recent years, it has been found that people in general are eating improper food in the sense that the content of food fibers is too low. Nutrionists and hygienists therefore recommend a substantially increased intake of fibers. Such increased intake can be achieved either by choosing particularly fiber-rich foodstuffs or by adding food fibers to ordinary foodstuffs so as to increase their content of food fibers. To the last-mentioned purpose, attempts have been made with varying success at manufacturing different kinds of food fibers based on plants, for use in foodstuffs. In this context, it has been difficult to manufacture food fibers which are neutral in taste, i.e. which have no undesired taste of the plant from which they originate, or because of the manufacturing process. Consequently, the food industry is in need of food fibers which are neutral in taste and which can be used as a fiber addition in foodstuffs.
SUMMARY OF THE INVENTION
The object of the present invention is to try and solve or reduce the above-mentioned problems and thus eliminate the waste disposal and environmental problems connected with potato pulp, and to provide a refined, economically valuable product which can be readily handled and used as a food fiber addition in foodstuffs, neutral in taste.
This object is achieved according to the invention in that dried potato fibers are manufactured from potato pulp in the manner defined in the appended claims and the description below.
The process according to the invention comprises the following steps: in that defoamed and added to the pulp to form a pulp/potato juice mixture which is relieved of solid impurities by density separation, whereupon dissolved salts in the pulp is reduced in that the pulp is prepressed to a dry solids content of 20-30% and then washed by adding water to obtain a dry solids content of 11-16%, whereupon the pulp is finally pressed to a dry solids content of 20-30%, after which the refined pulp is subjected to
The potato fibers manufactured in the process according to the invention are characterised in that they have a particle size of not more than 1 mm, contain not more than about 15% by weight of protein, not more than about 15% by weight of starch, and that the remainder consists of lignin and polysaccharides other than starch.
It has been found that the potato fibe
REFERENCES:
patent: 3079283 (1963-02-01), Dreissen
patent: 3890888 (1975-06-01), Verberne
patent: 3948677 (1976-04-01), Huster et al.
Corbin Arthur L.
Sveriges Starkelseproducenter
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