JP2003019475A - Drying method of food remainder and drying apparatus thereof - Google Patents
Drying method of food remainder and drying apparatus thereofInfo
- Publication number
- JP2003019475A JP2003019475A JP2001209099A JP2001209099A JP2003019475A JP 2003019475 A JP2003019475 A JP 2003019475A JP 2001209099 A JP2001209099 A JP 2001209099A JP 2001209099 A JP2001209099 A JP 2001209099A JP 2003019475 A JP2003019475 A JP 2003019475A
- Authority
- JP
- Japan
- Prior art keywords
- drying
- heat
- condensed water
- drying tank
- food residue
- 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.)
- Pending
Links
- 238000001035 drying Methods 0.000 title claims abstract description 80
- 235000013305 food Nutrition 0.000 title description 6
- 239000010794 food wastes Substances 0.000 claims abstract description 46
- 239000003570 air Substances 0.000 claims abstract description 43
- 239000007789 gases Substances 0.000 claims abstract description 43
- 239000011901 water Substances 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000009833 condensation Methods 0.000 claims description 15
- 230000005494 condensation Effects 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 7
- 239000003337 fertilizer Substances 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000855 fermentation Methods 0.000 description 9
- 230000004151 fermentation Effects 0.000 description 9
- 241000196324 Embryophyta Species 0.000 description 7
- 238000000034 methods Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- 239000007788 liquids Substances 0.000 description 6
- 150000001413 amino acids Chemical class 0.000 description 5
- 150000007524 organic acids Chemical class 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagrams Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000003507 refrigerants Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000001174 ascending Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 239000000047 products Substances 0.000 description 3
- 239000002994 raw materials Substances 0.000 description 3
- 229930008671 Acetic acid Natural products 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound 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- 239000010903 husk Substances 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound 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CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000000203 mixtures Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000008188 pellets Substances 0.000 description 1
- 229920001223 polyethylene glycols Polymers 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solutions Substances 0.000 description 1
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Abstract
Description
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for effectively utilizing evaporative gas generated in a process for treating food residues, and more specifically, for fermenting and drying food residues to obtain high quality feed or fertilizer. The present invention relates to a method and an apparatus for condensing and recovering evaporative gas generated in a drying step when obtaining.
[0002]
2. Description of the Related Art The processing of a large amount of food resources such as residues of general foods discharged from restaurants and homes and by-products during production in the food industry such as okara has become a problem. Conventionally, these food resources have been treated by being buried and discarded, incinerated, etc., but there are major social problems in terms of treatment cost, treatment space, environmental load, etc. Various alternative solutions have been investigated as alternatives.
As an example of the above method for treating food resources, it is widely used as it is as feed for livestock. However, the residue form contains a large amount of water, has problems such as form and odor, and is not suitable for storage, distribution, and storage, so there is a quantitative limit for reuse as feed and fertilizer. Is the current situation. Also,
There is also a problem that the quality and nutritional value of the feed are not as good as those of the mixed feed.
On the other hand, in order to solve the above problems, it has been proposed to ferment or dry the food residue and, if necessary, pelletize it into a feed suitable for distribution, and use it as a feed. And devices are known.
For example, in Japanese Patent Laid-Open No. 5-103650, a water content of a food waste is adjusted, a thermophilic bacterium is added to and mixed with it, and the mixture is kept at 50 to 85 ° C. with stirring to be fermented. In the manufacturing method, the raw material is charged into the fluidized bed drying furnace, thermophilic bacteria are added, and hot air is blown from below to dry and ferment the raw material in a fluidized state, and the raw material with a predetermined water content is collected with a dust collector. There is disclosed a technique of fermenting food waste by collecting and taking it out to produce a feed for animal husbandry.
Further, in Japanese Patent Application Laid-Open No. 10-327764, Okara is put in a lactic acid bacterium fermentation tank and subjected to fermentation treatment, and water content is adjusted as the next step, and grain husks and the like are further mixed in to supply crude fiber. A technique is disclosed in which a pellet machine is applied, and as post-treatment, aerobic fermentation, spoilage prevention, and rapid drying for improving storage stability, and bagging is performed to obtain feed for livestock and fertilizer for organic cultivation.
[0007]
However, any of the above-mentioned conventional techniques has the following problems, and it cannot be said to be a sufficient method for treating food residues.
That is, when fermenting a food residue to obtain a fertilizer or a feed, a drying step is essential because the food residue contains a large amount of water, and the storability and storability are controlled by adjusting the water content by drying. , The distribution is improved and it can be handled as a product. In addition, it is possible to inactivate unnecessary germs and weed species by temporarily exposing them to high temperatures in the drying step. In addition to water, a large amount of water-containing evaporative gas generated by this drying step contains useful components such as organic acids and amino acids produced by fermentation.
However, in the conventional method, this vaporized gas is released to the outside as it is or after being deodorized, etc., and it is not used at all, and the use of food residues is incomplete. Was occurring.
Further, although a large amount of heat is used in this drying step, since this heat is released as it is with the evaporative gas, there is a problem that the thermal efficiency of the entire plant is very poor and not economical. .
Therefore, an object of the present invention is to effectively utilize not only the vaporized gas generated by drying but also the heat possessed by the vaporized gas in a method of effectively utilizing as a feed or fertilizer from a food residue through fermentation and drying steps. And to provide a method and apparatus for increasing the thermal efficiency of a plant.
[0012]
In order to achieve the above object, the method for drying a food residue of the present invention is such that when the food residue is agitated in a drying tank and hot air is supplied to dry the residue, it is generated in the drying tank. It is a method of cooling and condensing the evaporative gas to be condensed and collecting it as condensed water, and a method of circulating and supplying the dried gas after collection again to the drying tank, in which the condensed water is collected and the heat of condensation is collected, It is characterized in that the condensation heat is applied to the dried gas after the condensed water is recovered to raise the temperature.
According to this method, the evaporative gas generated in the drying step can be recovered as a liquid, so that the organic acids, amino acids and the like contained therein can be effectively utilized as a liquid fertilizer and the like. At the same time, the heat of condensation can be recovered and this heat can be fed back to raise the temperature of the dry gas, so that the thermal efficiency of the plant is increased and the economic efficiency is improved.
Further, the food residue drying apparatus of the present invention comprises a drying tank equipped with a food residue stirring means and a hot air supply means, an inlet pipe for introducing the evaporative gas generated in the drying tank, and the evaporative gas. A condenser for collecting condensed water from the heating device, a heating device for raising the temperature of the dry gas after collecting the condensed water, and a discharge pipe for circulating the dried gas after heating to a drying tank. A drying device provided with a first heat exchanger for recovering heat of condensation of the condensing device, and a heating device for applying the recovered heat of condensation to the dried gas after recovery. It is characterized in that it comprises two heat exchangers, and further comprises a circulation means for circulating a heat medium between the first and second heat exchangers.
According to this apparatus, the condensed water can be continuously recovered from the evaporative gas generated by the drying step of the food residue, so that the treatment efficiency is high, and at the same time, the heat of condensation from the evaporative gas is condensed by the first heat exchanger. Is recovered and discharged from the second heat exchanger to raise the temperature of the dry gas, so that the recovery efficiency can be excellent and the recovery process can be performed at low cost.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below with reference to the drawings. 1 to 3 show one embodiment of the food residue drying apparatus of the present invention. FIG. 1 is a schematic configuration diagram of an apparatus used for stirring and drying food residues, FIG. 2 is a sectional view taken along the line III-III of FIG. 1, and FIG. 3 is an apparatus for condensing and recovering evaporative gas from a drying step. The schematic block diagram of is shown.
In the food residue drying apparatus of the present invention, hot air is supplied while agitating the food residue by the agitator 10 to generate evaporative gas, which is then condensed by a condenser 80 to condense air containing water vapor. The condensed water is collected and the dried gas after the treatment is heated again and supplied to the stirring device.
As shown in FIG. 1, the stirring device 10 includes a drying tank 20 having an opening / closing opening (not shown) on its upper surface,
Two spindle screws 40 and 41 arranged in parallel in the horizontal direction below the drying tank 20 and between the spindle screws 40 and 41, and in the axial middle portion thereof, It has an ascending screw 30 arranged vertically and two return screws 50, 51 which are also arranged in parallel in the horizontal direction above the spindle screws 40, 41.
The spindle screws 40 and 41 have basically the same structure, and one of them is shown in FIG. Hereinafter, one main spindle screw 40 will be described, and the description of the other main spindle screw 41 will be omitted because it has the same structure. Both ends of the main shaft screw 40 are supported by bearings 43 a and 43 b provided on both side walls of the drying tank 20, and an intermediate portion thereof is supported by bearings 43 c arranged in the drying tank 20. By thus supporting the intermediate portion of the screw shaft with the bearing 43c, it is possible to stably support the main shaft screw 40 even if the total length of the main shaft screw 40 is lengthened.
Each of the bearings 43a, 43b, 43c is covered with a bearing case 42, and an air supply pipe 55 is connected to the bearing case 42. The air supply pipe 55 introduces compressed air (a gas other than air may be introduced) into the bearing case 42 so that the food residue in the drying tank 20 does not enter the bearing case 42.
In addition, it is preferable that an appropriate sealing means is provided between the main shaft screw 40 and the bearing case 42.
Further, the main shaft screw 40 has a screw blade 40a on one end side from the middle portion thereof, and has a screw blade 40b opposite to the screw blade 40a on the other end side. . When the main screw 40 rotates in a predetermined direction, the two screw blades 40a and 40b move the food residue toward the central portion of the main screw 40, as indicated by arrows A and B in FIG. That is, the food residue is moved to the center.
The return screws 50 and 51 also have the same structure as the main shaft screws 40 and 41. That is, the return screws 50 and 51 have basically the same structure, and one of the return screws 50 is shown in FIG. Hereinafter, one return screw 50 will be described, and the description of the other return screw 51 will be omitted because it has the same structure. The return screw 50 has bearings 53 provided on both side walls of the drying tank 20 at both ends thereof.
It is supported by a and 53b, and the middle part is supported by the drying tank 2
It is supported by a bearing 53c arranged in the zero position. By thus supporting the intermediate portion of the screw shaft with the bearing 53c, it is possible to stably support the return screw 50 even if the total length of the return screw 50 is increased.
Each of the bearings 53a, 53b, 53c is covered with a bearing case 52, and an air supply pipe 55 is connected to the bearing case 52. The air supply pipe 55 introduces compressed air (a gas other than air may be introduced) into the bearing case 52 so that food residues in the drying tank 20 are not mixed into the bearing case 52.
Further, it is preferable that an appropriate sealing means is provided between the return screw 50 and the bearing case 52.
Further, the return screw 50 has a screw blade 50a on one end side from the middle portion thereof, and has a screw blade 50b opposite to the screw blade 50a on the other end side. . Then, when the main screw 50 rotates in a predetermined direction, the two screw blades 50a and 50b move the food residue toward both ends of the return screw 50, as shown by arrows C and D in FIG. That is, the food residue is returned to both sides.
The ascending screw 30 disposed above and below is located between the main shaft screws 40 and 41 and between the return screws 50 and 51, and is rotated in a predetermined direction to be centered by the main shaft screws 40 and 41. The brought food residue is raised as shown by arrow E in FIG. 2 and moved to the center of the return screws 50 and 51.
Therefore, the food residue is indicated by arrows A and B in FIG.
After being moved to the center in the lower part of the drying tank 20 as shown in FIG. 4, it is raised as shown by arrow E, is further moved to both sides as shown by arrows C and D, and is again shown by arrows F and G. It circulates in the drying tank 20 through a path of descending again.
At the bottom of the drying tank 20, an air introducing pipe 62 extending from an outlet pipe of a condensing and recovering device which will be described later is connected. The air introducing pipe 62 is branched into a plurality of branch pipes 62a. The air is connected to a plurality of places on the bottom of the unit 20 and heated air is introduced into the drying tank 20 from a plurality of places when necessary. Further, a lead-out pipe 22 for guiding the generated gas, water vapor and the like to the condensing and collecting device is provided above the drying tank 20.
On the other hand, as shown in FIG. 3, the outlet pipe 22 is connected to the inlet pipe 90 of the condensing and collecting apparatus 80. The condensing and collecting device 80 collects condensed water from the air containing steam generated in the drying tank 20 and the condensed water from the air containing the steam, and then raises the temperature again to form the drying gas as the drying tank 20. And a condensing device 81, a blower fan 83, and a heating device 82 arranged between these pipes, and the lead-out pipe 91 is connected to the air introduction pipe 62 described above. It is then circulated to the drying tank 20.
The condenser 81 includes a first heat exchanger 92,
It has a cooler 93 and an outside air introduction part 94. In the first heat exchanger 92, a heat medium flows between the first heat exchanger 92 and a second heat exchanger 95 described later via the pipes 86a and 86b. That is, the pipe 86 a has the pump 84, sends the heat medium from the first heat exchanger 92 to the second heat exchanger 95, and the pipe 86 b sends the heat medium to the second heat exchanger 9.
5 to the first heat exchanger 92. Therefore, the heat medium circulates in the pipes 86a and 86b. Here, a conventionally known medium can be used as the heat medium and is not particularly limited, but water, polyethylene glycol or the like can be particularly preferably used.
The cooler 93 is connected to a cooling device (not shown) via pipes 88a and 88b, and a refrigerant flows through these pipes. A condensed water recovery pipe 85 for extracting the generated condensed water is connected to the first heat exchanger 92 and the cooler 93. The outside air introducing portion 94 has a pipe 97 connected to an air introducing fan or the like (not shown).
Are connected to introduce a predetermined amount of outside air.
The blower fan 83 is adapted to be operated by a motor 98, and sends the air condensed by the condenser 81 to the heating device 82 side, and the air heated by the heating device 82 again. Play a role in sending to.
The heating device 82 includes a second heat exchanger 95,
And a heater 96. In the second heat exchanger 95,
As described above, the pipes 86a and 86b for circulating the heat medium with the first heat exchanger 92 are connected. The heater 96 is connected with a pipe 89a for introducing heating steam supplied from a boiler (not shown) and a pipe 89b for returning heat-exchanged steam that has undergone heat exchange.
A temperature sensor 87 is attached to the inlet pipe 90 and the outlet pipe 91, and the temperature of the refrigerant in the cooler 93 and the temperature in the heater 96 are adjusted so that the value of the temperature sensor 87 reaches a predetermined temperature. The temperature of the steam is controlled.
In addition, the first heat exchanger 92, the cooler 93,
The second heat exchanger 95, the heater 96, and the like have fins and the like for increasing the surface area in order to promote heat exchange with the heat medium flowing inside.
Next, the operation of the drying device will be described. First, the food residue is fermented by a fermentation process (not shown). Here, the food residue fermented in the fermentation step still contains a large amount of water, and since it is inferior in storage and storage properties as it is, it is necessary to separately adjust the water content in the drying step to evaporate the excess water content. Further, at this time, by exposing to high temperature, unnecessary germs and weed species can be inactivated.
Therefore, the food residue after fermentation is dried in the drying tank 20.
The hot air is supplied from the air introduction pipe 62 and is stirred, and the drying process is performed. However, the present invention can also be applied to the drying treatment of the food residue that has not undergone the fermentation treatment. Drying conditions are not particularly limited, but in order to effectively evaporate water, higher temperature conditions are preferable than in the fermentation step, the temperature of introduced heated air is 80 to 120 ° C., and the drying time is in the range of 8 to 24 hours. Preferably. Further, it is preferable to adjust the final water content to be in the range of 5 to 25% from the viewpoint of storability of the food residue after drying.
The dried food residue treatment product is finally formed into a predetermined shape and size by a pelletizing step, and if necessary, packaged, packaged and commercialized as feed or fertilizer. Can be used. This makes it possible to reuse the food residue to produce pelletized feed or fertilizer, and obtain feed or fertilizer suitable for long-term storage, distribution, and storage. The pelletized product thus produced can be suitably used as feed for pig farming or as a fertilizer for growing plants.
Next, the air containing steam generated in the drying tank 20 is taken out through the outlet pipe 22 and introduced into the condenser 81 through the inlet pipe 90. At this time, the temperature of the evaporative gas is almost the same as the drying temperature in the above-mentioned food residue drying step. Further, the vaporized gas is in a saturated state at a relative humidity of 100% at the above temperature, contains a large amount of water, and also contains an organic acid such as acetic acid and an amino acid component.
In the condenser 81, the evaporated gas first comes into contact with the first heat exchanger 92, and is deprived of heat by the heat medium flowing inside the first heat exchanger 92 to be cooled. Then, the cooler 9
3, the heat is taken away by the refrigerant flowing through it, and the refrigerant is further cooled, and the contained water vapor is separated as condensed water to form a dry gas. At this time, the temperature of the heat medium for cooling is preferably in the range of 0 to 10 ° C. This allows
The temperature of the dry air drops to about 10 to 30 ° C.
The condensed water obtained as described above is collected through the condensed water collecting pipe 85 and sent to, for example, a liquid fertilizer manufacturing process (not shown). The condensed water is recovered as an aqueous solution containing an organic acid such as acetic acid and an amino acid component, and can be used as a liquid fertilizer or the like. As a result, the food residue component can be effectively used.
On the other hand, the air that has been subjected to the condensation process and the temperature of which has been lowered by heat exchange is further mixed with the outside air in the outside air introducing portion 97 and sent to the heating device 82 by the blower fan 83.
Then, the second heat exchanger 95 of the heating device 82 is brought into contact with the second heat exchanger 95 to exchange heat with the heat medium flowing thereinto, the temperature is raised again, and then the steam from the boiler (not shown) flows in the heater 96. After the heat is exchanged to raise the temperature further, the outlet pipe 91
And the air introducing pipe 62 connected thereto, and enters the drying tank 20 again, and is returned to the drying step and circulated.
At this time, the heat medium circulated through the pipes 86a and 86b removes heat from the air containing the steam derived from the food residue drying process in the first heat exchanger 92, and the second heat exchange. Since the heat taken away in the container 95 is released, the heat recovered by the condenser 81 can be used by the heating device 82. As a result, the heater 96
Since less heat is required from the boiler used in, the energy saving in the drying process can be achieved.
The cooling device (not shown) connected to the cooler 93 via the pipes 88a and 88b is composed of a heat pump, and heat generated there is pipes 89a and 89b.
Through the heater 96. According to this, further energy saving can be achieved.
[0044]
As described above, according to the present invention,
Evaporative gas generated in the drying step for treating food residues can be recovered as a liquid, and the organic acids, amino acids, etc. contained therein can be effectively used as liquid fertilizers and the like.
Moreover, since the heat of condensation can be recovered at the same time as the condensation and fed back as a heat source for the drying process again, the heat energy required for the drying process can be reduced, the thermal efficiency of the plant can be improved, and energy saving can be achieved.
FIG. 1 is a schematic configuration diagram showing an embodiment of a drying tank in a food residue drying apparatus of the present invention.
FIG. 2 is a sectional view taken along the line III-III of FIG.
FIG. 3 is a schematic configuration diagram showing an embodiment of a condensation recovery device in a food residue drying device of the present invention.
10 Stirring device 20 Drying tank 30 Ascending screw 40 Main screw 50 Return screw 40a, 40b, 50a, 50b Screw blades 43a, 43b, 43c, 53a, 53b, 53c Bearing 42, 52 Bearing case 55 Air supply pipe 62 Air introduction pipe 80 Condensation recovery device 81 Condensation device 82 Heating device 83 Blower fan 84 Pump 85 Condensed water recovery pipes 86a, 86b, 88a, 88b, 89a, 89b Pipe 87 Temperature sensor 90 Inlet pipe 91 Outlet pipe 92 First heat exchanger 93 Cooler 94 outside air introduction section 95 second heat exchanger 96 heater 97 piping 98 motor
Front page continuation (51) Int.Cl. 7 Identification code FI theme code (reference) F26B 21/00 F26B 25/04 21/04 B09B 3/00 303M 25/04 ZABD (72) Inventor Makoto Nara Tsukuba, Ibaraki Prefecture 3721 Ichijima Name F-term inside Total Wellness Institute Co., Ltd. (reference) 3L113 AA06 AA07 AB02 AC05 AC21 AC40 AC45 AC46 AC48 AC52 AC58 AC63 AC67 BA01 CA08 CB13 CB24 CB29 CB34 DA02 4D004 AA03 AA04 AB01 AC05 BA04 CA15 CA18 CA22 CA42 CB05 CB05 CB05 CB05 CB31 CB36 4D052 AA00 BA03
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001209099A JP2003019475A (en) | 2001-07-10 | 2001-07-10 | Drying method of food remainder and drying apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001209099A JP2003019475A (en) | 2001-07-10 | 2001-07-10 | Drying method of food remainder and drying apparatus thereof |
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| Publication Number | Publication Date |
|---|---|
| JP2003019475A true JP2003019475A (en) | 2003-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001209099A Pending JP2003019475A (en) | 2001-07-10 | 2001-07-10 | Drying method of food remainder and drying apparatus thereof |
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| JP (1) | JP2003019475A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012096219A (en) * | 2010-11-01 | 2012-05-24 | Jiao Xuezhen | Technique and equipment for substance circulation in organism waste |
| JP2016519272A (en) * | 2013-03-15 | 2016-06-30 | サステイナブル オルターネイティヴ フィード エンタープライズィズ | System for processing primary food waste into secondary food |
-
2001
- 2001-07-10 JP JP2001209099A patent/JP2003019475A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012096219A (en) * | 2010-11-01 | 2012-05-24 | Jiao Xuezhen | Technique and equipment for substance circulation in organism waste |
| JP2016519272A (en) * | 2013-03-15 | 2016-06-30 | サステイナブル オルターネイティヴ フィード エンタープライズィズ | System for processing primary food waste into secondary food |
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