Food or edible material: processes – compositions – and products – Processes – Separating a starting material into plural different...
Reexamination Certificate
1998-05-01
2001-10-02
Bhat, Nina (Department: 1761)
Food or edible material: processes, compositions, and products
Processes
Separating a starting material into plural different...
C426S599000, C426S635000, C426S807000
Reexamination Certificate
active
06296888
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a method and an installation respectively for the extraction of vegetable juices from vegetable peelings, whether processed or not, or similar vegetable juices containing vegetable remnants.
BACKGROUND OF THE INVENTION
During industrial processing of vegetables into e.g. vegetable preserves, or frozen vegetables, such as is carried out with carrots and turnips, quite a lot of vegetable waste is produced after rinsing and peeling, in the form of vegetable peelings such as e.g. carrot and/or turnip peelings (usually called pulp), which are not considered to be useful for human consumption. Normally this vegetable waste is not only thrown away or used as fodder, but also the costs of removing, resulting from environmental legislation, this rapidly fermenting vegetable pulp, are relatively high. Analysis of those remnants shows that this vegetable waste/fodder still contains a considerable quantity of extractable vegetable juices which would otherwise be suitable for human consumption. Research however shows that the dry matter content of said pulp is not higher than approx. 10%, which means that the remaining 90% consists of moisture. The invention relates to a method and an installation respectively for extracting a vegetable juice from these aforementioned vegetable peelings (pulp), yet suitable for human consumption.
It is clear that if e.g. 20,000 tons of pulp, obtained by (steam)peeling of e.g. carrots or from other similar products (turnip, cabbage), are annually processed, a considerable quantity of carrot juices and/or other vegetable juices respectively, may yet be obtained which up to now are disposed of and thus wasted.
SUMMARY OF THE INVENTION
According to the invention, however and most surprisingly, it turned out yet to be possible by overextracting to obtain a juice most suitable for human consumption from those carrot (steam)peelings. The extraction takes place by separating the juice from the vegetable residue by means of squeezing and/or decantation and/or centrifugation and/or similar separation techniques, known per se. By appropriate adjustment of a separator a surprisingly high percentage of vegetable juice, amazingly well suitable for human consumption, can so be extracted from the pulp. The remainder is a residual product with a remarkably and surprisingly high dry matter content, which is now most suitable and useful as fodder.
According to the invention, the method for extracting vegetable juices, particularly from vegetable peelings, whether pretreated or not, or similar vegetable juice containing vegetable remnants (pulp), with a relatively low dry matter content and a high vegetable juice content, comprising the steps of:
a. grinding and/or shredding (if required) the vegetable remnants and/or separated vegetable pulp parts with a low dry matter content;
b. adding pH reducing additives to the vegetable pulp parts;
c. separating the juice from the residue, particularly the residue obtained by steam-peeling vegetables.
The separation can be effected by squeezing and/or decantation and/or centrifugation unit and/or similar separation techniques.
This will produce an exceptionally high juice yield, with high quality vegetable juices;
d. removal (if required) of sand elements and/or other impurities as residual components from the vegetable juice;
e. dosing one or more additives;
f. conditioning the obtained vegetable juice and/or the juice containing vegetable remnants, consisting of pasteurization and/or pH reduction;
g. bottling and/or deepfreezing and/or bulk packaging the vegetable juice obtained;
h. removing the residual product, with a relatively high dry matter content, which has been obtained during the separation stage.
Furthermore the invention relates to an installation for carrying out the method as described above. This installation comprises a combination of a number of consecutive processing stations, comprising:
a. if the coarseness of the residue supplied should make this advisable, first mechanical means for refining/reducing, e.g. by means of grinding and/or shredding the vegetable juice containing vegetable remnants or the vegetable pulp parts with low dry matter content;
b. second mechanical means, such as a metering pump, for a first addition of pH reducing additives;
c. third mechanical means for separating the juice from the residue (pulp) to extract the vegetable juices;
d. if the composition of the juice obtained should make this advisable fourth mechanical means for removing sand or other impurities as residual components from the vegetable juice;
e. fifth mechanical means for conditioning the squeezed out vegetable juice and/or the juice containing vegetable remnants, consisting of pasteurization and/or standardization of the pH in the juice and mechanical means for adding additives;
f. sixth mechanical means for bottling and/or deepfreezing and/or bulk packaging of the vegetable juice obtained;
g. seventh mechanical means for removing the dry residual product which has been obtained during the separation stage.
According to the invention, first mechanical means are constituted by a grinding and/or shredding unit known per se, to achieve a desired fineness.
According to the invention, second mechanical means comprise a device for the first addition of pH reducing additives to the vegetable residue. According to the invention, third mechanical means are provided for separating the vegetable juice from the vegetable residue by means of techniques known per se, such as squeezing and/or decantation and/or centrifugation and the like.
According to the invention, fourth mechanical means consist of means, known per se, to remove sand elements or other undesired residual components from the vegetable juice, e.g. by means of a sand and/or dirt cyclone.
According to the invention, fifth mechanical means are provided for the conditioning of the vegetable juice and/or the juice containing vegetable remnants which have been separated out, these means consisting of pasteurization and/or pH reduction and/or sixth mechanical means for the addition of other additives;
According to the invention, seventh mechanical means provided with the installation are used to bottle and/or deepfreeze and/or bulk package the vegetable juice obtained.
According to the invention, eighth mechanical means are provided for the removal of the residual product with a relatively high dry matter content, which is obtained during the separation stage.
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Philip Nelson, Ph.D., “Fruit & Vegetable Juice Processing Technology”, Avi Pub., 241-248, 532-533, Jul. 1980.*
Fuks et al., “Fruit Juice Extracting Press”, Patent SU986921 A, Derwent Abstract, Jan. 1983.
Bhat Nina
Knobbe Martens Olson & Bear LLP
Provalor B.V.
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