IE62885B1 - Method and device for the centrifugal removal of germs from milk - Google Patents
Method and device for the centrifugal removal of germs from milkInfo
- Publication number
- IE62885B1 IE62885B1 IE22289A IE22289A IE62885B1 IE 62885 B1 IE62885 B1 IE 62885B1 IE 22289 A IE22289 A IE 22289A IE 22289 A IE22289 A IE 22289A IE 62885 B1 IE62885 B1 IE 62885B1
- Authority
- IE
- Ireland
- Prior art keywords
- concentrate
- centrifuge bowl
- milk
- bowl
- nozzles
- Prior art date
Links
- 239000008267 milk Substances 0.000 title claims abstract description 25
- 235000013336 milk Nutrition 0.000 title claims abstract description 25
- 210000004080 milk Anatomy 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 9
- 244000052616 bacterial pathogen Species 0.000 title claims description 13
- 239000012141 concentrate Substances 0.000 claims abstract description 53
- 230000000737 periodic effect Effects 0.000 claims abstract 2
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 abstract description 8
- 230000001580 bacterial effect Effects 0.000 abstract 1
- 230000035622 drinking Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000013351 cheese Nutrition 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C7/00—Other dairy technology
- A23C7/04—Removing unwanted substances other than lactose or milk proteins from milk
- A23C7/046—Removing unwanted substances other than lactose or milk proteins from milk by centrifugation without using chemicals, e.g. bactofugation; re-use of bactofugate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C2210/00—Physical treatment of dairy products
- A23C2210/25—Separating and blending
- A23C2210/256—Removal or separation of bacteria, or a fraction containing bacteria, by centrifugation; Bactofugation
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F2300/00—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game
- A63F2300/10—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by input arrangements for converting player-generated signals into game device control signals
- A63F2300/1068—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by input arrangements for converting player-generated signals into game device control signals being specially adapted to detect the point of contact of the player on a surface, e.g. floor mat, touch pad
- A63F2300/1075—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by input arrangements for converting player-generated signals into game device control signals being specially adapted to detect the point of contact of the player on a surface, e.g. floor mat, touch pad using a touch screen
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F2300/00—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game
- A63F2300/30—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by output arrangements for receiving control signals generated by the game device
- A63F2300/301—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by output arrangements for receiving control signals generated by the game device using an additional display connected to the game console, e.g. on the controller
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Centrifugal Separators (AREA)
- Dairy Products (AREA)
- Physical Water Treatments (AREA)
Abstract
Via the feed 12, bacteria-containing milk is fed to the centrifuge (separator) bowl 1, which milk then passes into the disc pack 4. The bacteria separated off here collect in the concentrate space 5. Concentrate low in bacteria is continuously passed out of the concentrate space 5 via the outlet ducts 6 and the nozzles 7. Said concentrate passes into the paring chamber 8, from which it is returned with the aid of the paring elements 9 via the concentrate outlet 10 and the return line 11 to the feed 12. The residual concentrate with a high bacterial content is discharged by periodic opening of the discharge orifices 14. It is possible by the process to considerably reduce the production of bacteria-containing concentrate and thus considerably decrease the losses which result in particular in the processing of market milk. Since only concentrate very low in bacteria is taken off via the outlet ducts 6, there is no increase in bacteria in the outlet 23 of the centrifuge bowl.
Description
Description The invention refers to a net hod of centrifugal removal of germs from milk, in which the milk is fed to the inlet to a centrifuge bowl in the concentrate space in which the germ-containing concentrate spun off is collected, a partial amount of which is diverted from the centrifuge bowl via diversion channels provided with nozzles and the residual concentrate is discharged periodically via discharge openings provided in the bowl shell.
Methods of that kind are known and are preferred for use in the removal of germs from dairy milk and milk for drinking. A centrifuge suitable for the performance of the method is known, for example, from the DE-AS 29 13 405.
Via the diversion channels provided with nozzles about 3% of the amount of milk fed to the centrifuge bowl via the inlet is extracted as germcontaining concentrate. A further 0.3% of the inlet amount is discharged periodically via the discharge openings from the centrifuge bowl as germcontaining concentrate. The germ concentrate obtained in this way contains later alia strains of bacteria which have a negative effect upon the quality of cheese. Both partial flows are therefore combined again and subjected to a temperature treatment in a special steriliser.. In doing which all strains of bacteria are killed off. The sterilized concentrate can then be returned to the bulk milk again. But in the case of the removal of germs fro^ milk for drinking it is not allowed to return the sterilised germ concentrate into the drinking milk again so that the amount of germ concentrate arising in the case of the production of milk for drinking Is lost.
The problem of the present invention is to create a method of centrifugal removal of gerssss from milk, la which the amount of germ concentrate arising may be considerably reduced.
This problem is solved by the characterising features of the Main Claim.
It has surprisingly proved that the whole of the amount of concentrate diverted via the nozzles, extracted from a central region of the concentrate space, ray be returned into the inlet without thereby disadvantageously influencing the quality of the germ-freed milk run off. This depends upon the germs contained in the concentrate preferably gathering at the periphery of the bowl in the neighbourhood of the discharge openings whilst tha regaining constituents of the concentrate, the fat and the protein, take the route via the diversion channels and the nozzles so that no significant increase in the germ count is effected in the inlet milk through the return. The increase to be expected in the germ count in the germ-freed milk does not thereby occur.
Advantageous refinements say ba learned from the Sub-Claims.
An embodiment of the invention is represented in the drawing and explained in greater detail below. There is shown in: Figure 1 - a diagrammatic representation of the centrifuge bowl; and Figure 2 - tha detail X in accordance with Figure 1.
In Figure 1 the centrifuge bowl is designated by 1, its inlet space 2 being connected via channels 3 to the plate insert 4 which bounds the concentrate space 5 radially inwards. From the concentrate space 5 diversion channels 6 which are provided with nozzles 7, lead into a paring chamber 8 in which there is a paring sseaber 9 the concentrate outlet 5.0 from which is connected via a return lead 11 to tha inlet 12 which opens into the inlet space 2 in the centrifuge howl 1. Discharge openings 14 which are to be opened by a sleeve valve 13 lead from the periphery of the howl into a collector 15 for the germ concentrate. In the return lead 11 a regulating member 16 is provided for setting the amount of the returning germ concentrate. The diversion channels 5 are formed between the bowl cover 17 and a diverter plate 18 which is provided at a distance A" from it in the centrifuge bowl 1 and provided with ribs 19.
The milk from which the germs are to be removed is fed to the centrifuge bowl via the bypass 12 and arrives via the inlet space 2 and the channels 3 in the plate insert 4 in which the germs are separated from the milk and travel to the concentrate space 5.
A partial flow of concentrate low in germs is constantly led out of the concentrate space 5 in the centrifuge bowl via the diversion channels 5 and the nozzles 7 and the paring member 9, the concentrate outlet 10 and the return lead 11 back Into the inlet 12 to the centrifuge bowl 1. The germs collecting at the periphery of the bowl are from time to time discharged from the centrifuge bowl 1 via the discharge openings 14. The germ-freed milk flows via the channels 20 into the paring chamber 21 and is then led on through the paring member 22 to the outlet 23.
The diversion channels 5 provided with nozzles 7 leave from a region of the concentrate space 5 which is central, referred to Its radial extent. Concentrate particularly low in germs is thereby extracted from the concentrate space 5 so that the risk of an increase in the germ count in the inlet 12 to the centrifuge bowl 1 is avoided.
The clearance A between the bowl cover 17 and the diverter plate 18 is so chosen that, at the resultant speed of flow of the gera-contalniag concentrate in the diversion channels 5 an additional separation of germs is effected in the latter. Because of the coriolis forces acting in the diversion channels 6, independently of the cross-section of the diversion channels S an adequate clearance "A® is necessary. Good results have been achieved if the clearance A" was so chosen that for the individual diversion channel Q a throughput capacity of about 15 litres per hour per mm of the clearance A" resulted. If, e.g., 20,000 litres per hour of germ-containing milk is fed to the centrifuge bowl, 5% of which is extracted as germ-containing concentrate via diversion channels 6 formed by eight ribs 19, there results per diversion channel 6 a throughput capacity of ,000 1/h χ0.05τ8= 125 1/h .
If this value is divided by the 15 1/h per mm of the clearance A which is being striven for, the clearance A is calculated at 8.33 ism.
Through the regulating member 15 in the return lead 11 the amount of con ceatr&te to be extracted via the diversion channels may be easily sat.
In order to keep small the amount of gem-containing concentrates which arises, the amount of concentrate discharged via the discharge openings 14 should amount to a maximum of 0.4 to 0.5 % of the inlet amount.
In accordance with Figure 2 plates 24 say be provided between the bowl cover 17 and the diverter plate 18 in order to effect a still betterfine separation of gerxss.
Claims (8)
1. A method of centrifugal removal of germs from milk, in which the milk is fad to the inlet to a centrifuge bowl in the concentrate ·* space in which the germ-containing concentrate spun off is collected, a 5 partial amount of which is diverted from the centrifuge bowl via diversion channels provided with nozzles and the residual concentrate is discharged periodically via discharge openings provided in the bowl shell, characterized ia that the concentrate diverted via the nozzles is extracted from a central 10 region of the concentrate space and returned to the inlet to the centrifuge bowl, the amount of concentrate extracted via the nozzles amounting to a maximum of 1 to 10 * and the amount of concentrate discharged via the discharge openings from the centrifuge bowl amounting to 0.1 to 1.0 % of the amount of milk being fed via the inlet to the centrifuge bowl. 15
2. A method as in Claim 1, characterized in that the amount of concentrate.extracted via the nozzles amounts to 4 to 6 ‘ί and the amount of concentrate discharged via the discharge openings from the centrifuge bowl amounts to 0.4 to 0.6 % of the amount of milk being fed via the inlet tc the centrifuge bowl. 20
3. a centrifuge bowl for the performance of the method as in Claim 1, where the centrifuge bowl is provided with an inlet and a plate-insert which bounds a concentrate space radially inwards and from which start diversion channels provided with nozzles as well as discharge openings for the periodic discharge of concentrate 25 and the nozzles open into a paring chamber in which a paring member is provided for the conveyance of the concentrate low in germs which is extracted via the nozzles, into a concentrate outlet, characterised in that the concentrate outlet is connected via a return lead to 30 the inlet to the centrifuge bowl and the diversion channels start from the region of the concentrate space, which is central referred to its radial extent. •7
4. i centrifuge bowl as in Claim 3. characterized ia that a regulating member is provided in the return lead.
5. a centrifuge bowl as in Claim 3 or 4. characterized in that the working channels are formed by ribs which are arranged 5 between the bowl cover and a diverter plate provided at a clearance A” from it in the centrifuge bowl.
6. A centrifuge bowl as in Claim 5, characterized in that between th® bowl cover and the diverter plate plates are provided. 10
7. A method according to claim 1, substantially as hereinbefore described with reference to theaccompanying drawings.
8. A centrifuge bowl according to claim 5, substantially as hereinbefore described with reference to and as 15 illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3802305A DE3802305C1 (en) | 1988-01-27 | 1988-01-27 | Process and apparatus for the centrifugal removal of bacteria from milk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE890222L IE890222L (en) | 1989-07-27 |
| IE62885B1 true IE62885B1 (en) | 1995-03-08 |
Family
ID=6346056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE22289A IE62885B1 (en) | 1988-01-27 | 1989-01-25 | Method and device for the centrifugal removal of germs from milk |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPH01215238A (en) |
| AR (1) | AR241624A1 (en) |
| AT (1) | AT396049B (en) |
| BR (1) | BR8900326A (en) |
| CH (1) | CH675667A5 (en) |
| DE (1) | DE3802305C1 (en) |
| DK (1) | DK175463B1 (en) |
| FR (1) | FR2626143B1 (en) |
| IE (1) | IE62885B1 (en) |
| IT (1) | IT1224035B (en) |
| NL (1) | NL188202C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5683733A (en) * | 1993-05-13 | 1997-11-04 | Apv Pasilac A/S | Plant and a method of treating milk |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4040294C2 (en) * | 1990-12-17 | 1994-06-16 | Westfalia Separator Ag | Self-draining centrifugal drum for sterilizing milk |
| DE4322415C2 (en) * | 1993-07-06 | 1996-11-28 | Westfalia Separator Ag | Centrifugal drum to concentrate suspended solids |
| DE19503065C1 (en) * | 1995-02-01 | 1995-11-30 | Westfalia Separator Ag | Centrifugal sterilising of milk with minimised waste |
| DE19540031C1 (en) * | 1995-10-27 | 1997-03-13 | Westfalia Separator Ag | Centrifuge drum for concentrating solids with outlets to stripping chamber |
| DE19955178B4 (en) * | 1999-11-16 | 2004-12-23 | Tetra Pak Processing Gmbh | Process and plant for the treatment of centrifugal sediment from separators |
| DE10135317A1 (en) * | 2001-07-19 | 2003-01-30 | Bayer Ag | Deflection ring for a self-discharging centrifuge |
| CN102469802A (en) * | 2009-09-16 | 2012-05-23 | Gea机械设备有限公司 | Method for producing fresh milk having a longer shelf life |
| US20140308417A1 (en) | 2011-11-07 | 2014-10-16 | Tetra Laval Holdings & Finance S.A. | Method for producing and device for producing starting material milk for skim milk |
| BR112014010887A2 (en) * | 2011-11-07 | 2017-05-02 | Tetral Laval Holdings & Finance Sa | apparatus for producing a dairy cheese raw material |
| US12022795B2 (en) * | 2017-12-19 | 2024-07-02 | Tetra Laval Holdings & Finance S.A. | Separator and a method for separating milk |
| KR102296235B1 (en) * | 2021-04-22 | 2021-08-31 | 주식회사 삼공사 | Thin Disc Stack Centrifugal Oil Mist Separator |
| CN116764824B (en) * | 2023-08-25 | 2023-11-07 | 山东万佳食品有限公司 | Centrifuge for monosodium glutamate production |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB307933A (en) * | 1928-03-17 | 1929-10-17 | Separator Ab | Improvements in or relating to the centrifugal cleaning of liquids |
| US3217982A (en) * | 1958-10-17 | 1965-11-16 | Westfalia Separator Ag | Apparatus for the sterilization of liquids |
| NL128342C (en) * | 1966-11-22 | |||
| DE2913406B1 (en) * | 1979-04-04 | 1980-08-28 | Westfalia Separator Ag | Centrifugal drum with vertical axis of rotation for concentration of suspensions |
| DE3314859A1 (en) * | 1983-04-23 | 1984-10-25 | Westfalia Separator Ag, 4740 Oelde | METHOD AND DEVICE FOR CENTRIFUGAL CLEANING OF USED MINERAL OILS |
| DE3601814A1 (en) * | 1986-01-22 | 1987-07-23 | Westfalia Separator Ag | METHOD AND DEVICE FOR SEPARATING TWO LIQUID PHASES BY MEANS OF A CENTRIFUGE |
| DE3620548A1 (en) * | 1986-06-19 | 1987-12-23 | Westfalia Separator Ag | METHOD AND DEVICE FOR PRODUCING CITRUS JUICES WITH A LOW REMAINING PUMP |
| SE456801B (en) * | 1987-03-19 | 1988-11-07 | Alfa Laval Separation Ab | OUTPUT DEVICE BY CENTRIFUGAL SEPARATOR |
-
1988
- 1988-01-27 DE DE3802305A patent/DE3802305C1/en not_active Expired
- 1988-11-25 AT AT0290488A patent/AT396049B/en not_active IP Right Cessation
- 1988-12-05 DK DK678188A patent/DK175463B1/en not_active IP Right Cessation
- 1988-12-20 CH CH4702/88A patent/CH675667A5/de not_active IP Right Cessation
- 1988-12-27 IT IT68157/88A patent/IT1224035B/en active
- 1988-12-28 AR AR88312869A patent/AR241624A1/en active
-
1989
- 1989-01-13 FR FR8900364A patent/FR2626143B1/en not_active Expired - Lifetime
- 1989-01-24 NL NL8900171A patent/NL188202C/en not_active IP Right Cessation
- 1989-01-25 IE IE22289A patent/IE62885B1/en not_active IP Right Cessation
- 1989-01-26 JP JP1015194A patent/JPH01215238A/en active Granted
- 1989-01-26 BR BR898900326A patent/BR8900326A/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5683733A (en) * | 1993-05-13 | 1997-11-04 | Apv Pasilac A/S | Plant and a method of treating milk |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2626143B1 (en) | 1992-12-31 |
| FR2626143A1 (en) | 1989-07-28 |
| ATA290488A (en) | 1992-10-15 |
| IT1224035B (en) | 1990-09-26 |
| NL188202B (en) | 1991-12-02 |
| JPH0412933B2 (en) | 1992-03-06 |
| IE890222L (en) | 1989-07-27 |
| DE3802305C1 (en) | 1989-10-05 |
| AR241624A1 (en) | 1992-10-30 |
| BR8900326A (en) | 1989-09-19 |
| DK678188A (en) | 1989-07-28 |
| NL188202C (en) | 1994-05-16 |
| AT396049B (en) | 1993-05-25 |
| DK175463B1 (en) | 2004-11-01 |
| DK678188D0 (en) | 1988-12-05 |
| IT8868157A0 (en) | 1988-12-27 |
| NL8900171A (en) | 1989-08-16 |
| JPH01215238A (en) | 1989-08-29 |
| CH675667A5 (en) | 1990-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK9A | Patent expired |