JP2001302374A - Treating method for animal and plant residue waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treating method for animal and plant residue wastes which suffices with a deodorizing device and a waste water treating device having lower treating ability and lower performance. SOLUTION: This treating method for the animal and plant residue wastes prepares the resource recovery products, such as fertilizers, from the animal and plant residue wastes containing liquid organic matter, such as fat and oil components and blood, together with a large volume of water. The animal and plant residue wastes are fed together with adsorbents (auxiliary materials) of organic liquid matter, such as rice bran, to a reduced pressure drying machine 12 and are subjected to reduced pressure drying and thereafter the drying treated matter is discharged outside the system. The animal and plant residue wastes and auxiliary materials are fed to the reduced pressure drying machine 28 by a substantial hermetic system connected to the deodorizing device 12. The evaporated matter from the reduced pressure drying machine 12 is subjected to gas-liquid separation 22 and the liquid is subjected to waste water treatment 30 and the gas to deodorization treatment 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating animal and plant wastes, such as fertilizers and the like, from waste products containing organic liquids such as fats and oils and blood with a large amount of water. In particular, the present invention is suitable for treating animal and plant residues having a strong smell such as fish coarseness.

Here, the animal and plant residues include not only animal or plant solids used as raw materials in the manufacturing industry of foodstuffs, pharmaceuticals, fragrances and the like, but also manure and carcasses of animals related to livestock farming. (See Chemical Chemistry Handbook, Applied Edition, 3rd Edition, edited by The Chemical Society of Japan, Maruzen, pp. 1466, 1980).

[0003] Here, the processing of fish coarse will be described, but the present invention is not limited to this. In addition, a large amount of water generally refers to a case where the processed material contains 30% or more of water.

[0004]

2. Description of the Related Art A conventional method of treating fish coarse discharged from a fish market or the like has been, for example, as follows.

[0005] Fish coarse is mainly composed of internal organs and bones, and converts organic liquids such as oils and fats and blood into a large amount of water (usually 70 to 80%).
And about 4 to 8%. In the treatment of fish coarse, the fish coarse is boiled or steamed and then pressed to separate and remove oils and fats, and dried and pulverized to be used as fish manure.
The purpose of boiling is to facilitate separation and removal of fats and oils. The reason for performing separation and removal of fats and oils is that if a large amount of fats and oils remains, the drying efficiency is poor and the odor during drying is bad. Is caused.

[0006]

However, in the case of the above-mentioned treatment method, it is necessary to remove and separate contaminants in a pre-process before the boiling process.
In addition, odors are generated in all steps of separation and removal of fats and oils, and furthermore, drying and pulverization. Particularly, a bad odor is easily generated in a boiling step, and a high-performance / high-performance deodorizing device is required. In addition, the residual liquid after boiling and the waste liquid generated at the time of separation of oils and fats contain a large amount of blood components, and the wastewater treatment equipment requires a high capacity / high performance equipment.

[0007] In view of the above, an object of the present invention is to provide a method for treating animal and plant residue waste in which the deodorizing device and the wastewater treatment device also have a low capacity / low performance.

Another object of the present invention is to provide a method for treating animal and plant residue waste which can be directly dried without the need for pretreatment for removing impurities.

[0009]

The method for treating animal and plant residues according to the present invention solves the above problems by the following constitutions.

[0010] In a method of treating animal and plant residue waste from a waste of animal and plant residue containing fertilizers and the like, which contains organic liquid matter such as oils and fats and blood together with a large amount of water, the animal residue waste is treated with a recycled product. This is a method for treating animal and plant residue waste, in which the mixture is put into a reduced-pressure drier together with an organic liquid adsorbent (sub-material) that does not impair the value, mixed and dried under reduced pressure, and the dried product is discharged out of the system. In addition, the input of animal residue waste and auxiliary materials to the vacuum dryer is performed in a substantially closed system connected to the deodorizing means, and the evaporant from the vacuum dryer is separated into gas and liquid, and the liquid is treated for wastewater treatment. And the gas is deodorized.

The animal residue treatment plant according to the present invention solves the above-mentioned problems by the following constitution.

[0012] In a plant or animal waste treatment plant for preparing a recycle product such as fertilizer from animal or plant residue waste containing a large amount of water containing organic liquid matter such as oils and fats and blood, a vacuum dryer and a vacuum dryer An animal residue waste supply means and an oil / fat adsorbent supply means which are substantially hermetically connected to the treated material supply site are provided, and further, a gas-liquid separation device is connected to a vapor outlet from the reduced-pressure dryer, A deodorizing device and a wastewater treatment device are connected to a gas outlet and a liquid outlet of the separator, respectively.

[0013] In the reduced-pressure dryer, the drying container is a rolling cylinder, the rolling cylinder has an annular cutting blade protruding along an inner peripheral surface thereof, and has an inner peripheral surface. It is desirable to use a device provided with a scraping means that is in sliding contact with the surface because the drying under reduced pressure can be performed while impurities are included.

In each of the above-mentioned treatment methods and plants, it is desirable that the animal and plant residues are made coarse of fish containing contaminants and shell hull powder is used as an auxiliary material, since the effects of the present invention are remarkable and therefore.

When the present invention is applied to a rough fish treatment method, the dried material is sieved and separated into a lump composed of bone and impurities and a lump, and the lump removed from the lump is removed. At the same time, it is desirable to crush and simultaneously mix the powder with the powder to obtain fish manure, since the recycling efficiency can be increased and the biological circulation can be promoted.

The processing plant used in the processing method is as follows:
A sieving machine for lump and powder is connected to a treated material discharge site of the reduced-pressure dryer, and a lump removal stage is provided at a lump discharge site of the sifter, and a lump discharge site of the lump removal stage is provided. Is connected to a crushed material crusher, and further, a particle size adjusting crusher is connected to a crushed material discharge portion of the crushed material crusher and a powdery material outflow portion of the sieving machine.

[0017]

Next, an embodiment of a method and plant for treating animal and plant residue wastes according to the present invention will be described in detail. Here, a description will be given using fish coarse as an example of animal and plant residue waste, but the same applies to other animal and plant residue wastes containing a large amount of organic liquids such as oils and fats and blood.

(1) Basically, wastes of animal and plant residues are put into a reduced-pressure dryer together with an organic liquid adsorbent (sub-material) that does not impair the value of a recycled product, and dried under reduced pressure. Thereafter, the dried product is discharged out of the system.

An example of a plant used in the above processing method will be described with reference to model diagrams shown in FIGS.

A reduced-pressure dryer 12, an animal and plant residue waste supply means 16 and an auxiliary material supply means 1 which are substantially hermetically connected to a treated material supply portion (input / discharge port 14) of the reduced-pressure dryer 12.
And a gas-liquid separator 22 is connected to a vapor outlet 20 from the vacuum dryer 12.
The second gas outlet 24 and the liquid outlet 26 are connected to a deodorizing device 28 and a wastewater treatment device 30 via a suction pump (vacuum pump) 32 and a liquid sending pump 34, respectively.

Here, the animal and plant residue waste supply means 16 comprises:
After the fish coarse put in the container 36 is weighed by the measuring device 38, it moves to the transport line L, moves to the treated material supply site of the vacuum dryer 12 by the lifter 40, and is automatically inverted and put therein. The empty container 36 after the coarse feeding of the fish is returned to the original position of the weighing device 38 on the same transport line L, the own weight of the empty container is also measured, and the empty container 36 is sent to a discharge conveyor (not shown). The transfer line L
Has a substantially sealed structure with a duct 44 connected to the deodorizing device 28, and a charging hopper 45 operated by an air cylinder is disposed at an outlet side of the duct 44.

Although not shown, the auxiliary material supply means 18 can normally supply the auxiliary material to the reduced-pressure dryer 12 via a belt conveyor by a hopper loader via a measuring device from a storage tank with a fixed-quantity feeder, and can be hermetically connected. Configuration.

More specifically, animal and plant residue waste supply means 1
The processing object receiving hopper 82 in the duct 44 and the drying container 46 that cover the drying container 6 is directly connected to the deodorizing device 28 through the respective paths, so that the internal odor can be hermetically sucked. In addition, each closed bucket conveyor 98A, 98
C, cover of the impurity removal stage 88, bagging machine 10
4. The product outlet 96a of the particle size adjusting pulverizer 96 and the pulverized bone meal outlet 90a of the bone crusher 90 are respectively:
,, And are connected to the bag filter 108 connected to the deodorizing device, so that the odor can be similarly hermetically sucked.

The vacuum drying apparatus of the present embodiment is not particularly limited, but preferably has a configuration as shown in FIGS. 3 to 4 (refer to FIGS. 2 and 3 of JP-A-10-192828). The drying vessel (drying oven) 46 is a rolling cylinder, and the rolling cylinder (drying vessel 46) has a substantially triangular cutting blade 48 on the inner peripheral surface thereof, and the inner circumference of the rolling cylinder. It is desirable to use a structure having a scraping means 50 that comes into sliding contact with the surface.

More specifically, the drying container 46 is capable of rolling on the guide rolls 52, 52, and
4 is rotatably supported via bearings 58, 58 attached to the base and the front end of a support shaft (center shaft) 56 cantilevered. And the drying container 46 is
Although not shown, the motor is driven by a chain or a gear.

In order to dry the drying container 46 under reduced pressure, a support shaft (center shaft) 56 is hollow, and the base end of the support shaft 56 is connected to a suction pipe 33 communicating with the vacuum pump 32.
The support shaft 56 is provided with a plurality of suction pipes 62 (four in the illustrated example) each having a cap 60 at the tip, and is configured to be able to suck and reduce the pressure in the drying container 46. On the other hand, an air supply pipe 64 is inserted through the base of the support shaft 56 and is formed along the support shaft 56 in the drying vessel 46, and a plurality of air supply pipes 64 are formed in the drying vessel 46. By providing (in the illustrated example, seven) air supply nozzles 66 and opening and closing the air supply pipe 64 valve, the degree of pressure reduction can be adjusted. Note that a compressor (not shown) is connected to the air supply pipe 64 so that high-pressure air can be periodically blown out from the air supply nozzle 66.

Further, although not necessary, from the viewpoint of improving the drying efficiency, the drying container 46 is provided with a heating jacket 68, which is connected to the heating jacket 68 via a rotary joint 70 at one end of the support shaft 56. A heat medium circulation path 72 through which the heat medium circulates is formed.

The scraping means 50 for scraping the organic matter adhering to the inner wall of the drying container 46 is fixed to the support shaft 56 by the doctor blade 74 abutting on the inner wall of the drying container 46 being urged by a pressure adjusting spring 76. Is supported by a doctor holder 78 that has been set.

Although it is not indispensable, in order to increase the agitating action by transporting the object to be processed collected in the lower part of the inner wall of the drying container 46 upward and dropping it downward, the inner wall of the drying container 46 has Row-shaped pockets (not shown) may be formed at intervals of 1/4 turn.

Further, on the inner wall of the drying container 46, a substantially triangular cutting blade 4 disposed between the pockets 80 adjacent in the circumferential direction along the rotating (rolling) direction of the drying container 46.
8 (6 × 4 = 24 at equal pitches in the circumferential direction and the axial direction, respectively, in the illustrated example). This cutting blade 48
Has an effect of mixing an organic substance while cutting an object to be processed stored in a lower portion. In FIG. 4, 5
7 is a reinforcing plate.

(2) The plant of the above-mentioned fish roughing method further comprises a step of sieving and separating the lump into a lump and a lump, and then crushing the lump from which the contaminants have been removed, and simultaneously mixing the lump with the lump to produce a fish fertilizer. The following devices are provided for the purpose.

As shown in FIG. 1, a vibrating feeder 8 is provided at a processed material discharge portion (processed material receiving hopper 82) of the vacuum dryer 12.
A sieving machine 86 for sieving the lump and the pulverized matter is connected via the tube 4, and a lump crusher 90 is connected to the lump outflow site of the sieving machine (vibrating screen) 86. further,
The pulverized bone meal discharge port 90a of the bone crusher 90 is connected to the processing object supply port 96a of the particle size adjusting pulverizer 96 via the bucket conveyor 98B and the screw conveyor 94, and the processing target supply port 96a is sieved. It is connected to the powder outflow side of the machine 86 via a bucket conveyor 98A, and can be supplied simultaneously with the crushed bone and the powder.

In the present embodiment, a bucket conveyer 98C is connected to the product outlet 96b of the particle size adjusting and crushing machine 96 at a lower portion, and once put into the product silo 100, is attached to the bottom of the product silo 100. The product is packed in a bag 106 by a product bagging machine 104 after being pneumatically fed by the supplied fixed quantity feeder 102.

(3) Next, the mode of use of the above plant will be described. In the example shown in the figure, the plant is one system, but it is desirable that two systems are used so that even if one system needs to be stopped for maintenance, it is not necessary to stop the operation.

First, an organic liquid adsorbent and fish coarse are simultaneously fed into the inlet / outlet 14 of the vacuum dryer 12. At this time, it is usually desirable to use shell hull powder such as defatted rice bran and bran as the adsorbent for the organic liquid. This defatted rice bran is added to adsorb the oil and fat of fish coarse and facilitate decompression and crushing and drying. Fish coarse, as described above, 4
Since it contains 物 8% of an organic liquid material (such as oils and fats), the organic liquid material is suppressed to less than 4% to facilitate drying under reduced pressure. Usually, the amount of defatted rice bran is 3 to 20 parts by weight, preferably 5 to 15 parts by weight based on 100 parts by weight of fish. If the amount of defatted rice bran is too small, it is difficult to obtain the required organic liquid substance adsorption effect, and if the amount of defatted rice bran is too large, the amount of processed material increases, and relatively large amounts of fish coarse cannot be added, resulting in reduced processing efficiency. I do.

Further, in this embodiment, since the drying container 46 is rolled to stir, even if there are foreign substances such as metal pieces (fish hooks), strings, paper pieces, wood pieces, etc. It can be put into the drying container 46 without any treatment.

After the fish coarse and auxiliary materials (defatted rice bran) have been charged into the vacuum dryer 12, the processing material input / discharge port 14 is closed,
Thereafter, the drying container 46 of the vacuum dryer 12 is rolled.
At this time, heating steam is simultaneously sent to the heating jacket 68 of the drying container 46, and the vacuum pump 32 is activated to reduce the pressure inside the drying container 46. The operating conditions at this time were as follows: the rotation speed of the drying vessel 46: 10 to 20 rpm, the heating steam temperature: 100 to 200 ° C., and the degree of pressure reduction (absolute pressure): 2.66 × 10 ⁴
7.97.98 × 10 ⁴ Pa, drying time: 12 to 24 hours.

Here, in the coarse fish containing impurities, the ratio of organic liquids such as oils and fats and blood is reduced by the defatted rice bran, whereby the evaporation of water is efficiently promoted. This is because the amount of heat used for evaporating the water in the fish coarseness is reduced by the amount absorbed by the fats and oils, the blood component is also absorbed into the rice bran, and the degree of increase in the boiling point can be reduced.

Then, the object to be treated put in the drying container 46 is stirred by the rolling of the drying container 46. At this time,
Due to the presence of the pocket 80, the object to be processed is partially lifted up to the ceiling, and the stirring is performed more efficiently.
Then, the organic matter adhering to the drying container 46 is constantly scraped by the doctor blade 74, and the heat transfer efficiency from the heating jacket 68 to the object to be processed via the peripheral wall of the drying container 46 is maintained. Further, the cutting blade 48 crushes the coarse fish meat chunk and promotes drying. Thus, the moisture 70
An object to be treated containing ８０80% is dried to a moisture content of 10% or less.

The steam and odor generated during operation are
It is sucked by the vacuum pump 32 and flows into the gas-liquid separator 22 from the outlet 20 through the suction pipe 33 and the heat exchanger (cooler) 21. The gas (odor) separated by the gas-liquid separation device 22 flows into the deodorization device 28 via the vacuum pump 32 and is discharged to the atmosphere. On the other hand, the liquid (drainage) flows into the wastewater treatment device 30 by the liquid feed pump 34 and is drained.

After the completion of the drying step, the lid of the inlet / outlet 14 of the drying container 46 is removed, and
6 is rotated at a variable speed and discharged onto the vibration feeder. Then, the discharge amount is variably adjusted by changing the rotation speed of the drying container 46 to perform a constant discharge.

The dried product received by the vibration feeder 84 is
It is quantitatively supplied to the vibrating sieve 86 quantitatively.

The contaminants, large bones, and fish meal clumps remaining on the sieving machine (20 mmφ punching plate) with the dried product supplied to the vibrating sieving machine 86 are sent to a turntable 88 which is a contaminant removal stage. After passing through the sieving machine 86, the fish meal mixed with small bones (chemical product) is transported to and stored in a powdery stock silo 99 by a powder bucket conveyor 98.

In the foreign matter removal stage 88, foreign matter is selectively removed by hand, and the lump (large bones and fish lump) remaining on the turntable 88 is crushed by the lump crusher 90, and then the powder bucket conveyor 98 is crushed. Crushed material storage silo 10
Transport to 1 and store.

When the fish meal is supplied from the powder storage silo 99 to the particle size adjusting crusher by the quantitative feeder 99a, the crushed material (bone meal) is simultaneously joined from the crushed material silo 101 by the screw conveyor 94.

The powdery material (fish meal) and the crushed material (bone meal) are crushed by a particle size adjusting crusher (swing hammer crusher, punching mesh 8 mmφ) 96 to adjust the particle size. Then, the product is conveyed to the product silo 100 by the bucket conveyor 98, and is put on standby for packing.

The product stored in the product silo 100 is automatically weighed and filled into the bag 106 by the bag filling machine 104 as appropriate, and is shipped as a product.

[0048]

According to the method for treating animal and plant residue waste of the present invention, the animal and plant residue waste is put into a vacuum dryer with a mixing function together with an organic liquid adsorbent that does not impair the value of the recycled product. A method for treating animal and plant residue waste, which comprises mixing and drying under reduced pressure in a batch, and discharging the dried product outside the system. The following effects can be obtained by a configuration in which the evaporant from the vacuum dryer is separated into gas and liquid, the liquid is drained, and the gas is deodorized.

There is no conventional process of boiling (steaming) animal and plant residues such as fish coarses containing a large amount of oils and fats, and the occurrence of bad habits due to the inclusion of oils, fats, blood, etc. during boiling is low.
The waste liquid after gas-liquid separation is less contaminated with fats and oils and blood components.

Therefore, the method for treating animal and plant residues according to the present invention has a low deodorizing apparatus and a wastewater treating apparatus.
Only low performance is required.

Further, as a reduced-pressure drying device, the drying container is a rolling cylinder, the rolling cylinder includes an annular cutting blade protruding along the inner peripheral surface thereof, and the rolling cylinder is formed of a rolling cylinder. By using one that has a scraping means that slides in contact with the inner peripheral surface, even if impurities such as metal pieces, strings, and wood pieces are contained inside, drying processing is possible, and after the drying processing, Then, the impurities may be removed.

For this reason, since the removal of the impurities is performed after the drying process, it is not necessary to perform the operation of removing the impurities in a work environment wet with blood or oil and having a bad smell.
The working environment is also greatly improved.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flow chart showing a process of separating a powdery and lumpy material of a processed product under reduced pressure in a plant for treating animal and plant residue waste according to the present invention.

FIG. 2 is a schematic flow chart after the process of separating the powdery and lumpy substances of the treated product under the reduced pressure.

FIG. 3 is a longitudinal sectional view of a reduced-pressure drying apparatus used in the present invention.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

[Explanation of symbols]

 12 Vacuum dryer with mixing function 18 Organic liquid adsorbent supply component 22 Gas-liquid separator 28 Deodorizer 30 Drainage treatment device 46 Drying container 48 Cutting blade 50 Scraping means 86 Vibrating screen (sieving machine) 88 Impurity removal stage 90 Bone crusher 96 Mixed crusher

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shuji Sakai 284 Higashiriki-cho, Kanazawa-shi, Ishikawa Pref. 4H061 AA02 AA03 CC32 CC42 EE61 FF07 FF08 GG13 GG19 GG41

Claims (7)

[Claims] 1. A method for treating animal and plant residue waste, which comprises preparing a recycle product such as fertilizer from animal and plant residue waste containing an organic liquid matter such as oils and fats and blood with a large amount of water, wherein the animal residue waste is recycled. Together with an organic liquid adsorbent that does not impair the value of the chemical product (hereinafter referred to as “sub-material”), and then put it into a vacuum dryer to dry under reduced pressure. In the treatment method, the introduction of the animal and plant residue waste and the auxiliary material into the vacuum dryer is performed in a substantial closed system connected to a deodorizing unit, and the evaporant from the vacuum dryer is separated into gas and liquid. A wastewater treatment for liquids and a deodorization treatment for gases. 2. As the reduced-pressure drier, a drying container is a rolling cylinder, which has a cutting blade on its inner peripheral surface and slides on the inner peripheral surface of the rolling cylinder. The method for treating animal and plant residue waste according to claim 1, wherein the method is provided with a scraping means that comes into contact with the waste. 3. The method for treating animal and plant residue waste according to claim 1, wherein the animal and plant residue is coarse fish containing impurities, and shell hull powder is used as the auxiliary material. 4. After sieving and separating a lump and a powder from the dried product according to claim 3, removing impurities from the lump, the lump is further pulverized and simultaneously with the powder. A method of treating animal and plant residue waste, wherein the waste is mixed with a substance to produce fish manure (recycled product). 5. A plant for treating animal and plant residue waste which prepares a recycle product such as fertilizer from animal and plant residue waste containing an organic liquid matter such as oils and fats and a large amount of water together with a large amount of water. An animal residue waste supply means and an auxiliary material supply means which are substantially hermetically connected to an input portion of the dryer; and a gas-liquid separation device is connected to a vapor outlet from the vacuum dryer, An animal and plant residue waste treatment plant, wherein a deodorizing device and a wastewater treatment device are connected to a gas outlet and a liquid outlet of a separation device, respectively. 6. The reduced-pressure dryer, wherein the drying container is a rolling cylinder, the rolling cylinder includes a cutting blade on an inner peripheral surface thereof, and is slid on an inner peripheral surface of the rolling cylindrical body. The plant for treating animal and plant residue waste according to claim 5, further comprising a scraping means that comes into contact with the waste. 7. A plant for treating animal and plant residue waste used for treating fish coarse, wherein a sieve for separating into a lump and a powder is connected to a discharge portion of the vacuum dryer, and the sieve is connected to the sieve. A lump removal stage is provided at the lump discharge site of the machine, a lump crusher is connected to the lump discharge site of the lump removal stage, and the crusher discharge site of the lump crusher and the sieving machine 7. The plant for treating animal and plant residue waste according to claim 6, wherein a particle size adjusting pulverizer is connected to the powdery substance outflow site.