WO1994002025A1 - Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen - Google Patents
Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen Download PDFInfo
- Publication number
- WO1994002025A1 WO1994002025A1 PCT/DE1992/000581 DE9200581W WO9402025A1 WO 1994002025 A1 WO1994002025 A1 WO 1994002025A1 DE 9200581 W DE9200581 W DE 9200581W WO 9402025 A1 WO9402025 A1 WO 9402025A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aqueous solution
- raw
- vegetables
- raw vegetables
- solution according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A23B7/00—Preservation of fruit or vegetables; Chemical ripening of fruit or vegetables
- A23B7/10—Preserving with acids; Acid fermentation
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A23B7/00—Preservation of fruit or vegetables; Chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10
- A23B7/153—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10 in the form of liquids or solids
- A23B7/157—Inorganic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
Definitions
- the invention relates to an aqueous solution for preserving mechanically prepared and washed raw vegetables according to the preamble of claim 1 and a method for their use according to the preamble of claim 7.
- raw vegetables such as B. potatoes, carrots, celery, leeks, kohlrabi, lettuce, spinach or the like. But also the individual consumer, for whom the peeling, cutting or cleaning of raw vegetables is too time-consuming, falls back on raw vegetables already offered ready for cooking.
- a process is also known from FR-PS 466 589 for treating fresh fruit with sulfuric acids or their salts.
- the raw vegetable waste resulting from the mechanical pre-processing of the raw vegetables is also only of a short shelf life. Longer storage is not possible because the spoilage sets in quickly and is noticeable through an unpleasant smell of waste. In the case of raw vegetable waste too, excessive treatment with sulfur is not possible, since this waste is further processed into animal feed or collected for direct feeding. The sulfur enriched in the feed would thus be passed on indirectly to humans via the food chain through the consumption of animal food.
- the object of the invention is therefore to provide an aqueous solution and a method for its use, with which a longer storage of mechanically pre-processed raw vegetables and the resulting waste is possible without endangering health.
- an aqueous solution which is characterized in that sodium hydrogen carbonate and / or sodium carbonate, citric acid and at least one element from the group of alkali and alkaline earth metals are contained as constituents.
- the object is further achieved by a method according to claim 7, which is characterized in that the raw vegetables are treated after washing with an aqueous solution according to one of claims 1-3 and are packed after the treatment.
- aqueous solution according to the invention and the process for its use lead to the fact that after a treatment according to the process the durability of the most varied types of raw vegetables, ie. H. Potatoes, carrots, celery, leeks, kohlrabi, lettuce, spinach or the like can be expanded to up to 8 months. No changes in the mechanically processed raw vegetables can be determined, in particular the appearance and taste and its consistency remain fresh over the entire time.
- the aqueous solution contains the constituents sodium hydrogen carbonate and / or sodium carbonate, citric acid and at least one element from the group of alkali and alkaline earth metals in a mixing ratio of 3-5: 1 , 5-2.5: 0.5-1.5.
- the proportion of the constituents is 0.01-0.5% by weight of the aqueous solution.
- At least one of the elements magnesium, potassium and / or calcium is present as a constituent.
- a further advantageous embodiment of the invention provides that a mixture of calcium and magnesium in a ratio of 65:35 - 55:45 is added to the aqueous solution according to claim 1.
- the constituents sodium hydrogen carbonate and / or sodium carbonate, citric acid and at least one element from the group of the alkali and alkaline earth metals make up 0.5-2.5% by weight of the aqueous solution.
- the raw vegetables are vacuum-packed after the treatment.
- a mixture of calcium and magnesium is added to the raw vegetable waste in a mixing ratio of 65: 35-55: 45, and that the raw vegetable waste is then treated with the aqueous solution described above.
- the treatment time is approximately 30-200 seconds.
- a film is used as the packaging, which has a thickness of 100-130 ⁇ m and a permeability of 10-20 cm 3 / m 2 .
- the invention is described in more detail below with reference to the examples, without being restricted to these examples.
- Example 1 Potato / knife peeling
- Raw potatoes that are stuck are separated from their outer skin by knife peeling and washed.
- the starch cells under the shell are only slightly damaged by the knife peeling, so that there is a smooth structure which allows a certain diffusion on the outer membrane of the starch cells.
- an aqueous solution which contains sodium hydrogen carbonate and / or sodium carbonate, citric acid and minerals (Mg, K, Ca) as components in a mixture ratio of approximately 4: 2: 1, the total amount of the components being approximately 0 , 10% by weight of the aqueous solution.
- the freshly peeled and washed potatoes are placed in the aqueous solution for about 60-140 seconds. Da ⁇ after the potatoes are comparable dripping in a film packing, the ⁇ a thickness of about 120 and a für understand ⁇ speed of about 15 cm3 / 1 "2, and then vakuu- ier.
- the shelf life of the potatoes treated in this way is about 45 days.
- Example 2 Potatoes / knife peeling
- Raw potatoes that are stuck are separated from their outer skin by knife peeling, cut into chopsticks and slices and washed.
- an aqueous solution which contains sodium hydrogen carbonate and / or sodium carbonate, citric acid and minerals (Mg, K, Ca) as components in a mixing ratio of approximately 4: 2: 1, the total amount of the components being approximately 0 , 25% by weight of the aqueous solution.
- the freshly peeled and washed potato sticks or slices are placed in the aqueous solution for about 60-140 seconds.
- the potato is then packaged drip-free in a film which has a thickness of approximately 120 ⁇ m and a permeability of approximately 15 cm 3 / m 2 .
- the potato sticks or slices have a shelf life of 45 days in the case of vacuumed packaging, the shelf life of 15 days in the case of air-drawn packaging and the shelf life of 10 days in the case of loose packaging.
- Example 3 Potato / carbon peeling
- Raw potatoes with a floury meal are separated from their outer skin by carbon round peeling. Some potatoes are cut into pieces, others into chopsticks or slices.
- the outer shell of the potato is, as it were, "rubbed off” by the circular carbon peeling, as a result of which the membrane of the starch cells located under the shell is affected. Grooves and furrows can be determined microscopically. Due to the larger surface area, the diffusion on the outer membrane increases.
- An aqueous solution is therefore prepared which contains sodium bicarbonate and / or sodium carbonate, citric acid and minerals (Mg, K, Ca) as components in a mixture ratio of approximately 4: 2: 1, the total amount of the components being approximately 0.30% by weight of the aqueous solution is.
- the freshly peeled, e.g. T. cut and washed potatoes are added to the aqueous solution for about 60-140 seconds. Then the potatoes or potato pieces, chopsticks and slices are packed drip-free in a film according to Example 1 or 2.
- the shelf life for vacuum-packed packaging is 45 days, for air-drawn packaging 15 days and for loose packaging 10 days.
- aqueous solution which contains sodium hydrogen carbonate and / or sodium carbonate, citric acid and minerals (Mg, K, Ca) as constituents in a mixing ratio of about 4: 2: 1, the
- the total amount of the components is about 0.03-0.07% by weight of the aqueous solution.
- the freshly pre-processed vegetables are added to the aqueous solution for about 80-160 seconds. Then that will be described below.
- the shelf life for vacuum-packed packaging for the vegetables is between 5 and 8 months, depending on the type of vegetable.
- Salads are cut, cleaned and washed and then placed in an aqueous solution for 60-80 seconds, the sodium bicarbonate and / or sodium carbonate, citric acid and minerals (Mg, K, Ca) as components in a mixing ratio of about 4: 2 : 1 contains.
- the amount of the components is about 0.03-0.05% by weight of the aqueous solution.
- the salad is then packed drip-free or air-drawn.
- the shelf life is about 8 days in both cases.
- the storage temperature is approximately 4-8 ° Celsius, which corresponds to the normal refrigerator or cold store temperature. From Examples 1-5 it can be seen that the composition of the aqueous solution according to the invention and the process for its use in pre-processed raw vegetables are such that treatment of the raw vegetables with the aqueous solution according to the invention diffuses on the outer membrane accelerates the cell and generates a stable osmotic pressure in the partly exposed cells of the pre-processed raw vegetables.
- a powdery mixture of sodium hydrogen carbonate, citric acid and minerals i.e. at least one element from the group of alkaline earth and alkali metals, in particular magnesium, calcium and / or potassium, and preferably calcium in a mixing ratio of about four parts
- the sodium hydrogen carbonate is converted to sodium carbonate in distilled water and is then essentially present as such in the aqueous solution according to the invention. It is also possible first to prepare a concentrate of the aqueous solution, for example with a proportion of the mixture described above in the total solution of about 50% by weight, so that the dilution suitable for any raw vegetable can then be easily prepared.
- the respective raw vegetables are then treated with the aqueous solution in such a way that the pre-processed raw vegetables are added to the corresponding aqueous solution and remain there for the treatment time.
- the pre-processed raw vegetables are also conceivable to treat the pre-processed raw vegetables in a spray bath.
- the salts of the alkaline earth metals or alkali metals magnesium, calcium and potassium are used as minerals, since on the one hand magnesium and potassium occur in large quantities in the raw vegetables, ie. H. also diffuse in larger quantities and must therefore be added again, and on the other hand calcium delays the evaporation of water and also helps to keep the aqueous solution in the neutral pH range.
- the water used is returned and the relatively dry peeling waste of the raw vegetables is collected in a suitable container. Calcium and magnesium are then spread over the raw vegetable waste in a mixing ratio of approximately 60:40.
- an aqueous solution which contains sodium hydrogen carbonate or sodium carbonate, citric acid and mineral substances (Mg, K, Ca) as constituents in a mixing ratio of about 4: 2: 1, the
- the total amount of the constituents is about 1-2% by weight of the aqueous solution.
- the aqueous solution is poured onto the raw vegetable waste so that it can just penetrate the raw vegetable waste. Finally, the raw vegetable waste is whisked using a suitable stirrer and placed in a cool room at a maximum of 20 ° C.
- the shelf life of the raw vegetable waste treated according to the invention is about 8 days. Only after this point in time does a decomposition process begin, which can easily be detected by a different smell.
- the raw vegetable waste described in Example 6 is still relatively moist despite water drainage. For this reason, in addition to treatment with the aqueous solution according to the invention, a mixture of magnesium and calcium must be added, since both magnesium and calcium can bind water to itself and calcium also prevents the evaporation of water. By binding the water, the raw vegetable waste becomes significantly drier and thicker in a short time. This is desirable because the waste is later to be processed into animal feed or to be picked up for direct feeding. For this reason, the raw vegetable waste can only be treated with the aqueous solution according to the invention to such an extent that it just penetrates the raw vegetable waste. The evaporation-inhibiting property of the calcium added ensures, however, that the desired success - achieving a longer shelf life and thus a longer shelf life is achieved.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Preparation Of Fruits And Vegetables (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SK752-93A SK75293A3 (en) | 1992-07-15 | 1992-07-15 | Watery solution for prolongation of durability of mechanically pretreated and washed fresh vegetables |
| DE59208337T DE59208337D1 (de) | 1992-07-15 | 1992-07-15 | Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen |
| ES92915079T ES2101855T3 (es) | 1992-07-15 | 1992-07-15 | Solucion acuosa y procedimiento de conservacion de verduras crudas y de desechos de verduras crudas. |
| EP92915079A EP0612219B1 (de) | 1992-07-15 | 1992-07-15 | Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen |
| AT92915079T ATE151230T1 (de) | 1992-07-15 | 1992-07-15 | Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen |
| PCT/DE1992/000581 WO1994002025A1 (de) | 1992-07-15 | 1992-07-15 | Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen |
| DK92915079.5T DK0612219T3 (da) | 1992-07-15 | 1992-07-15 | Vandig opløsning og fremgangsmåde til konservering af rå grøntsager og affald fra rå grønsager |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1992/000581 WO1994002025A1 (de) | 1992-07-15 | 1992-07-15 | Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994002025A1 true WO1994002025A1 (de) | 1994-02-03 |
Family
ID=6875167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1992/000581 Ceased WO1994002025A1 (de) | 1992-07-15 | 1992-07-15 | Wässrige lösung und verfahren zum haltbarmachen von rohgemüse und rohgemüseabfällen |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0612219B1 (de) |
| AT (1) | ATE151230T1 (de) |
| DE (1) | DE59208337D1 (de) |
| DK (1) | DK0612219T3 (de) |
| ES (1) | ES2101855T3 (de) |
| SK (1) | SK75293A3 (de) |
| WO (1) | WO1994002025A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR731991A (fr) * | 1930-12-27 | 1932-09-10 | Nordmark Werke Gmbh | Mélange salin physiologiquement équilibré |
| EP0141875A1 (de) * | 1982-05-10 | 1985-05-22 | STAY FRESH, Inc. | Verfahren und Zusammensetzung zur Behandlung von essbaren Produkten |
| FR2585538A1 (fr) * | 1985-08-02 | 1987-02-06 | Sellegaard E | Procede de conservation des vegetaux |
-
1992
- 1992-07-15 WO PCT/DE1992/000581 patent/WO1994002025A1/de not_active Ceased
- 1992-07-15 DE DE59208337T patent/DE59208337D1/de not_active Expired - Fee Related
- 1992-07-15 DK DK92915079.5T patent/DK0612219T3/da active
- 1992-07-15 SK SK752-93A patent/SK75293A3/sk unknown
- 1992-07-15 EP EP92915079A patent/EP0612219B1/de not_active Expired - Lifetime
- 1992-07-15 ES ES92915079T patent/ES2101855T3/es not_active Expired - Lifetime
- 1992-07-15 AT AT92915079T patent/ATE151230T1/de not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR731991A (fr) * | 1930-12-27 | 1932-09-10 | Nordmark Werke Gmbh | Mélange salin physiologiquement équilibré |
| EP0141875A1 (de) * | 1982-05-10 | 1985-05-22 | STAY FRESH, Inc. | Verfahren und Zusammensetzung zur Behandlung von essbaren Produkten |
| FR2585538A1 (fr) * | 1985-08-02 | 1987-02-06 | Sellegaard E | Procede de conservation des vegetaux |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 15, no. 64 (C-806)15. Februar 1991 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59208337D1 (de) | 1997-05-15 |
| EP0612219B1 (de) | 1997-04-09 |
| ATE151230T1 (de) | 1997-04-15 |
| SK75293A3 (en) | 1994-08-10 |
| EP0612219A1 (de) | 1994-08-31 |
| ES2101855T3 (es) | 1997-07-16 |
| DK0612219T3 (da) | 1997-06-16 |
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