JP2004358455A - Waste treating method,apparatus, and system, and drying apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste treating method, a waste treating apparatus, a waste treating system, a drying apparatus, and a drying method by which volume of discharged waste can be reduced and adverse influence on an environment can be eliminated. <P>SOLUTION: A decomposing treatment tank 5 is provided with a crusher 14, a sludge storing tank or a sludge thickening storing tank, an organic solvent injection machine 6, an enzyme injection machine 12, a stirrer 15, and a heating device 13. The organic solvent injection machine 6 is a machine for storing an organic solvent for resolving excess sludge and charging the organic solvent in the tank. As a solvent, for example, D-limonen or pine oil is used. Having characteristic aroma and antiseptic action, it suppresses production of malodor at its circumference even when the discharged waste is stored for a fixed period of time. The enzyme injection machine 12 is a machine for storing an enzyme for resolving excess sludge and charging the enzyme in the tank. By action of α-amylase, resolving efficiency of starch-containing waste water from a kitchen or garbage or the like can be raised. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a waste treatment method for treating waste, for example, garbage, kitchen waste, wastewater, and human waste discharged from large buildings, factories, sewage treatment plants, and the like, a waste treatment apparatus used in the waste treatment method, and a waste treatment method. The present invention relates to a waste treatment system, a drying device, and a drying method using a waste treatment device.

  Conventionally, in order to treat organic wastewater, wastewater is oxidized by aerobic microorganisms in an aeration treatment apparatus, the wastewater is separated in a sedimentation tank, and the accumulated sludge is treated and discarded.

  Depending on the biological oxidation (biological treatment) of microorganisms, microorganisms that have grown by ingesting organic matter and untreated wastewater are generated in large amounts as excess sludge. Discarding the surplus sludge adversely affects the environment, and various surplus sludge reduction and treatment methods have been developed.

A conventional example of a method for treating excess sludge includes an ozone method (for example, see Patent Document 1). In the ozone method, oxygen (O ₂ ) is discharged and converted into ozone (O ₃ ), and the ozone is dissolved in wastewater to perform treatment.

There is also a method using a strong alkali or a strong acid to dissolve the cell wall of a microorganism that occupies most of the excess sludge (for example, see Patent Document 2).
JP-A-9-75978 (paragraph number [0026], FIG. 1). JP-A-2002-320991 (paragraph number [0027], FIG. 1).

  However, in the technology described in Patent Document 1, since the conversion rate of oxygen to ozone and the solubility of ozone in water are low, excess sludge discharged inadequately to solubilize the hardly decomposable cell wall is also reduced. It will be considerable. In addition, since the sludge is solubilized by ozone or the like and decomposed at an existing facility, the load on an existing wastewater treatment tank may increase and become unstable. In some cases, there is an increase in the amount of phosphorus in the treated water, so that it may not be possible to treat in a place where phosphorus is regulated.

  Further, in the technology described in Patent Document 2, it is necessary to neutralize wastewater after treatment, and if the wastewater is drained with insufficient neutralization, there is a risk of causing an environmental problem.

  Therefore, the present invention has been made to solve such a problem, and a waste treatment method, a waste treatment apparatus, and a waste treatment that reduce the amount of waste discharged and do not adversely affect the environment. It is an object to provide a processing system.

  Still another object of the present invention is to provide a large amount of energy, such as carbonization, without performing a process of generating carbon dioxide, and to remove garbage and kitchen waste made of a single material discharged from a food factory or the like. It is an object of the present invention to provide a waste treatment method, a waste treatment device, and a waste treatment system capable of decomposing a waste.

  In order to achieve the above object, a waste treatment method according to a main aspect of the present invention is a step of storing waste in a storage area, and a step of charging a solvent containing a terpene to the stored waste. A step of introducing an enzyme containing α-amylase into the stored waste, and a step of stirring the waste into which the solvent and the enzyme have been introduced.

  In the present invention, the terpene introduced into the waste is agitated after decomposing the waste into a solid content and a liquid content, so that the treatment efficiency can be improved, and it is necessary to dry the waste at a high temperature. Gone. Since α-amylase has an action of decomposing starch as an enzyme in addition to the action of decomposing terpenes, it is possible to improve the processing efficiency of waste such as kitchen waste including rice and potatoes. Further, since the discharged waste has an extremely low moisture content, it can be used as livestock feed, aggregate, compost, etc. depending on the components contained in the waste.

  In one embodiment of the present invention, the solvent includes at least one of D-limonene and pine oil. As a result, D-limonene or pine oil has a peculiar fragrance and has an antiseptic effect, so that even if the discharged waste is stored for a certain period of time, no odor is generated around it.

  In one embodiment of the present invention, the waste is kitchen waste composed of a single material or a plurality of materials. As a result, since enzymes are added in addition to the solvent, kitchen waste discharged from restaurants and kitchens is a single material that is difficult to decompose by biological treatment of, for example, only one kind of fish and one kind of vegetables. However, stable processing can be performed.

  In one embodiment of the present invention, a heating step of heating the waste, the input organic solvent or the enzyme, and a pulverizing step of pulverizing the waste may be further provided. As a result, the waste can be easily decomposed, so that the waste treatment efficiency can be improved.

  Further, in one embodiment of the present invention, a dehydration step of dehydrating by centrifugation, squeezing, or the like may be further provided. Thereby, the efficiency of the decomposition treatment tank can be increased.

  A waste treatment apparatus according to another aspect of the present invention includes a storage unit that stores waste, a first input unit that inputs a solvent containing a terpene to the storage unit, and an α- It is characterized by comprising a second feeding means for feeding an enzyme containing amylase, and a stirring means for stirring the waste, the solvent and the enzyme stored in the storage section.

  In the present invention, the terpene, which is a solvent introduced into the waste, decomposes the waste into solids and liquids, and stirs the waste in the storage unit. It is not necessary to provide a separate apparatus for drying. In addition, since an enzyme containing α-amylase that degrades starch is added in addition to the action of decomposing terpenes, it is possible to improve the processing efficiency of waste such as kitchen garbage including rice and potatoes. Furthermore, the treated waste has an extremely low water content, and depending on the components contained in the waste, the resources can be reused as livestock feed, aggregate, compost, and the like.

  In one embodiment of the present invention, the solvent includes at least one of D-limonene and pine oil. Accordingly, D-limonene or pine oil has a peculiar aroma and has an antiseptic action, so that even if the discharged waste is stored for a certain period of time, it does not generate an odor in the surroundings.

  In one embodiment of the present invention, the waste is kitchen waste composed of a single material or a plurality of materials. As a result, enzymes are added in addition to the solvent in the container, so that kitchen waste discharged from restaurants and kitchens is a single material that is difficult to biologically treat, such as only one kind of fish or one kind of vegetables. However, stable processing can be performed.

  Further, in one embodiment of the present invention, a heating unit for heating waste or a compound to be charged and a crushing unit for crushing waste may be provided. This allows

Thereby, the efficiency of the decomposition treatment tank can be increased.

  Further, in one embodiment of the present invention, a dehydrating means for dehydrating by centrifugation, squeezing, or the like may be further provided. Thereby, the efficiency of the decomposition treatment tank can be increased.

  A waste treatment system according to another aspect of the present invention includes a biological treatment device that performs biological treatment of waste with microorganisms, and an organic sludge that has been subjected to biological treatment by the biological treatment device, including an esoteric substance. It is characterized by comprising a settling device for settling the excess sludge, and a waste treatment device for decomposing the excess sludge settled by the settling device.

  In the present invention, since the cell wall of the microorganisms contained during the biological treatment contained in the excess sludge is decomposed by the extra waste treatment device, the amount of the excess sludge can be reduced stably without applying a load. In addition, since the discharged waste has a low moisture content, it can be used as livestock feed, aggregate, compost, and the like depending on the components contained in the waste. Furthermore, since the enzyme containing α-amylase has the action of decomposing starch in addition to the action of decomposing terpenes, it is possible to improve the efficiency of treating waste such as kitchen waste containing rice and potatoes. If D-limonene or pine oil is used as a terpene solvent, these solvents have a peculiar aroma and have an antiseptic action, so even if the discharged waste is stored for a certain period of time, it emits an odor around it. I will not let you.

  According to one embodiment of the present invention, a storage device for storing waste to be discharged to the biological treatment device, a dehydration device for dehydrating the settled excess sludge, and an excess sludge dehydrated by the dehydration device And a transfer unit for transferring to a decomposition processing tank. Thereby, the amount of surplus sludge to be discharged can be further reduced.

  A drying apparatus according to another aspect of the present invention is a drying apparatus for drying waste, comprising means for mixing the waste with natural oil and an enzyme and performing a heat treatment under reduced pressure. And

  A drying method according to another aspect of the present invention is a drying method for drying waste, wherein the waste is mixed with a natural oil and an enzyme, and these are heat-treated under reduced pressure. I do.

  As described above, according to the present invention, it is possible to reduce the amount of waste discharged and prevent the environment from being adversely affected.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a waste treatment system according to one embodiment of the present invention, and FIG. 2 is a flowchart of the waste treatment system according to one embodiment of the present invention.

  The present waste treatment system describes treatment of wastewater discharged from a large building having a restaurant, a toilet, and the like, but is not limited thereto.

  As shown in FIG. 1, the waste treatment system of the present invention includes a sedimentation separation tank 1, an aeration tank 3, a sedimentation tank 4, a sludge storage tank or a sludge concentration storage tank described later, a dewatering tank 11, and a decomposition treatment tank 5. Is done.

  The sedimentation separation tank 1 is a tank for temporarily storing organic wastewater discharged from a kitchen or the like. The sedimentation separation tank 1 is provided with an adjusting device 2, and the adjusting device 2 adjusts an outflow amount of the wastewater flowing out to the aeration tank 3. Thereby, it is possible to adjust the outflow amount according to the processing capacity of the aeration tank 3 and the decomposition processing tank 5.

  The aeration tank 3 is a tank for performing biological treatment of the wastewater from the precipitation separation tank 1 with microorganisms. The aeration tank 3 includes an aeration device 7 and a microorganism inlet 9. Microorganisms are introduced from the microorganism inlet 9, and the aeration device 7 generates aeration containing a large amount of oxygen. Thereby, the microorganisms are activated, and the action of decomposing the organic matter contained in the wastewater can be promoted. For example, a natural organic acid substance may be added to the aeration tank 3 to activate and proliferate the microorganism. The biologically treated wastewater flows out to the sedimentation tank 4. Further, the aeration tank 3 may be provided with a device for removing an odor generated from the aeration tank 3.

  The sedimentation tank 4 is a tank for allowing the wastewater subjected to the biological treatment from the aeration tank 3 to stand still and separating it into a precipitate and a supernatant. Excess sludge, which is a sediment, is sent to the dewatering tank 11 and the dewatering machine 17. The supernatant is discharged to the outside from a water discharge port 16 provided in the sedimentation tank 4. Thereby, it is possible to separate the water and the excess sludge from the wastewater.

  The sludge storage tank or sludge concentration storage tank (not shown) is a concentrator (not shown) that concentrates excess sludge from the sedimentation tank 4 with external pressure. The sludge storage tank or the sludge concentration storage tank sends the concentrated excess sludge to the dewatering tank 11.

  The dehydration tub 11 or the dehydrator 17 is for dehydrating the sediment sent from the sedimentation tub 4. Dehydration is performed by, for example, centrifugation or pressing. The dewatering tub 11 and the dehydrator 17 are provided with a return device 10. The return device 10 is a device for returning moisture generated by dehydration to the precipitation / separation tank 1 via the return path 8. The return path 8 may be configured to communicate with the aeration tank 3 and the precipitation tank 4. The dehydrated surplus sludge is sent to the decomposition tank 5. As described above, a concentrating device (not shown) for concentrating excess sludge may be provided in front of the water tank 11 or the dehydrator 17. Thereby, water can be further removed from the excess sludge, the sludge can be concentrated, and the processing time of the dehydrator can be shortened.

  The decomposition treatment tank 5 is a tank for decomposing and processing excess sludge from the dehydration tank 11 with an organic solvent and an enzyme. The decomposition tank 5 is provided with a pulverizer 14 (not used in the case of sludge treatment), a dehydrator 17, an organic solvent injector 6, an enzyme injector 12, a stirrer 15, and a heating device 13.

  The crushing device 14 is a device for finely crushing garbage and the like by a mechanical external force, and can improve the decomposition efficiency. The dehydrator 17 is a device for dehydrating water such as garbage crushed by the crusher 14.

  The organic solvent charging machine 6 is a machine for storing an organic solvent for decomposing excess sludge and charging the organic solvent into the decomposition treatment tank 5. As the organic solvent, limonene, terpenes, rosin, and the like are used. Terpenes include terpene hydrocarbons, terpene alcohols, terpene aldehydes and the like. Examples of the solvent containing a terpene hydrocarbon include D-limonene, and examples of the solvent containing a terpene alcohol include pine oil. 0.08% by weight to 0.12% by weight, more preferably about 0.1% by weight of natural oil may be added to the waste. The enzyme input machine 12 is a machine for storing and inputting an enzyme for decomposing excess sludge. It is a preferred embodiment that the enzyme contains α-amylase. By using an enzyme containing α-amylase as an enzyme, it is possible to increase the efficiency of decomposing wastewater and kitchen garbage from a kitchen containing starch. Here, caustic soda may be added if the waste is not to be reused as feed or feed. The stirrer 15 is a machine for mixing the excess sludge with the inputted organic solvent or enzyme, can improve the decomposition efficiency, and can simultaneously treat the dewatered sludge and the garbage. The heating device 13 is a machine for heating excess sludge to form a slurry, but may be a device for heating to recover the inputted organic solvent. During the decomposition treatment, a solubilizing agent for facilitating the destruction of the cell wall contained in the excess sludge may be added. If the waste cannot be reused as feed or feed, the treatment cost can be reduced by adding about 50% of caustic soda (sodium hydroxide) in addition to the organic solvent and the enzyme.

  The operation of the above waste treatment system will be described in detail with reference to FIG.

  First, organic wastewater, kitchen waste, and the like (hereinafter, referred to as “wastewater”) discharged from a large building or the like are stored in the sedimentation separation tank 1 after decomposition of oil contained in the wastewater and liquefaction of solids (ST101). ).

  The stored wastewater is sent to the aeration tank 3 with its outflow controlled by the adjusting device 2. The wastewater is subjected to biological treatment by microorganisms input from the microorganism input port 9 in the aeration tank 3 (ST102).

  The biologically treated wastewater is sent to the sedimentation tank 4 by a pump or the like. The wastewater sent to the sedimentation tank 4 is left still until it is separated into a sediment and a supernatant, and sedimentation occurs (ST103).

  The supernatant separated from the wastewater is subjected to a treatment such as filtration, and then discharged from the water discharge port 16, and the sediment is concentrated in the sludge storage tank or the sludge concentration storage tank (ST104).

  The concentrated precipitate is sent to a dehydrator 17 via a dehydration tank 11 and a crushing device 14. The sediment is dehydrated by centrifugation or pressing in the dehydration tank 11 and the dehydrator 17 (ST105).

  The water generated by the dehydration is returned to the precipitation / separation tank 1 via the return path 8. The dehydrated surplus sludge is sent to the decomposition treatment tank 5, where an organic solvent and an enzyme are charged, and the decomposition treatment is performed by stirring the stirrer 15 (ST106).

  The water content of the waste can be reduced by performing the treatment in the decomposition treatment tank 5 at a hot air temperature of about 180 to 220 degrees Celsius for 5 to 6 hours. The water content before the treatment is, for example, 80.1% and 13 kg, and the water content after the treatment is 5.9% and 2.5 kg. The water content can be determined based on the exhaust gas temperature of the gas discharged from the decomposition treatment tank 5. According to the inventor's test, when the exhaust temperature is about 100 to 120 degrees Celsius and the material temperature is 65 degrees Celsius, the water content is about 5% to 20%. The exhaust temperature and the material temperature become 53 ° C. and 91 ° C. after 1 hour from 44 ° C. before the treatment, respectively, due to the hot air temperature of about 180 ° C. to 220 ° C. after 1.5 hours, and 64 ° C. after 1.5 hours. Degree, exhaust temperature becomes 95 degree, after 2 hours, product temperature becomes 64 degree, exhaust temperature becomes 110 degree, after 3 hours, material temperature becomes 65 degree Celsius, exhaust temperature becomes 102 degree, after 3.5 hours, product temperature 81 degree, exhaust temperature When the temperature reaches 102 degrees, the disassembly ends. In order to heat the inside of the decomposition treatment tank 5, a preliminary heater using a heating wire or the like may be provided at the lower part of the floor. The organic solvent and the enzyme are fed by the organic solvent feeder 6 and the enzyme feeder 12. The charging of the organic solvent and the enzyme may be controlled automatically by using a computer. The organic solvent and the enzyme may be supplied by a worker or the like who operates the present processing apparatus. In the decomposition treatment, the treatment is promoted by heating by the heating device 13, and the amount of generated excess sludge can be reduced. Excess sludge that has been decomposed is discarded as waste.

  Organic solvents (natural oils) and enzymes should be added before adding fats and oils, and sludge and garbage-free natural oils (limonene, pine oil, etc.) without fats and oils should be decomposed without adding enzymes. Can be done. In order to carry out the decomposition treatment efficiently, it is sufficient to add 0.08% by weight to 0.12% by weight, more preferably about 0.1% by weight of natural oil based on the waste. The processing can be performed very efficiently by a method in which the total amount is not initially charged but is divided into three times with respect to the entire amount.

  In addition, the temperature of the hot air is initially set at about 180 to 220 degrees, but the method of stepwise decreasing the exhaust temperature and the material temperature so that a natural organic acid (natural oil) is introduced is very efficiently decomposed. Can be performed. It is particularly effective for organic substances having a high water content.

  With the above, the operation of the waste treatment system of the present invention ends.

  As described above, according to the present embodiment, for example, D-limonene or pine oil is introduced as a solvent from the organic solvent introduction device 6 while being stirred by the stirrer 15 in the decomposition treatment tank 5, so that the waste is separated into the solid content and the liquid content. Can be decomposed into

  In addition, since these solvents have a peculiar aroma and have an antiseptic action, even if the discharged waste is stored for a certain period of time, no odor is generated around the waste.

  Further, since the enzyme containing α-amylase is fed from the enzyme feeder 12, the efficiency of treating waste such as kitchen waste including rice and potatoes can be improved.

  Next, another embodiment of the present invention will be described.

  In this embodiment, a vacuum dryer is used in place of the decomposition processing tank 5 (the components of the decomposition processing tank 5 except for the crusher 14 and the dehydrator 17) in the above-described embodiment. This system configuration will be described with reference to FIG.

  As shown in FIG. 4, the vacuum dryer has a vacuum chamber 21, a steam boiler 23, a condenser 26, a vacuum pump 27, a natural oil input device 30, and an enzyme input device 31.

  The outer periphery of the vacuum chamber 21 has a jacket structure, and the inside of the vacuum chamber 21 is heated by sending steam from the steam boiler 23 into the jacket 24. A drain 25 for exhaust is formed in the vacuum chamber 21. In addition, a vacuum pump 27 is connected to the vacuum chamber 21 via, for example, a condenser 26 for condensing steam, and the inside of the vacuum chamber 21 is depressurized by the vacuum pump 27. Note that the inside of the vacuum chamber 21 may be heated using a heat medium or the like instead of the steam.

  A thermometer and a pressure gauge (not shown) are connected to the vacuum chamber 21, and a control unit (not shown) controls the steam boiler 23 and the vacuum pump 27 based on these detection results to thereby control the vacuum chamber 21. The inside is maintained at a desired temperature and pressure.

  The vacuum chamber 21 has an input port 28 into which waste such as excess sludge pulverized by the pulverizing device 14 (for example, a hopper) shown in FIG. 1 is input, and an output port 29 through which dried products are discharged. From the inlet 28, natural oil and enzyme are fed by a natural oil feeder 30 and an enzyme feeder 31. Examples of natural oils include limonene, terpene, rosin and the like. 0.08% by weight to 0.12% by weight, more preferably about 0.1% by weight of natural oil may be added to the waste. In addition, it is a preferable embodiment that the enzyme contains α-amylase. By adding the enzyme, for example, the terpene surface-active action is promoted, the cell wall of the microorganism is destroyed, and the water is easily evaporated. Further, it is possible to suppress the waste from being in a dumpling state as described later.

  In the vacuum chamber 21, a rotary scraping blade 32 for stirring and crushing the object to be processed is arranged. The rotary scraping blade 32 is rotated by a motor (not shown). Note that a stirring blade may be provided in the vacuum chamber 21 to promote drying of the processing object.

  In the vacuum dryer configured as described above, the waste crushed by the crusher 14 is put into the vacuum chamber 21 through the inlet 28 together with the natural oil and the enzyme.

  For example, the inside of the vacuum chamber 21 is decompressed to -90 to 96 kpa and is heated to about 40 ° C., and the input waste is mixed with the natural oil and the enzyme by the rotary scraping blades 32, and is mixed under reduced pressure. It will be heated and the waste will be dried. Then, the dried product is discharged from the discharge port 29.

  As described above, in the present embodiment, since the waste is dried by the vacuum dryer, the boiling point is low, the energy efficiency is high, and the operation is safe and the operation management is easy. In particular, in this embodiment, since natural oil and enzyme are introduced in such a vacuum drying step, stirring efficiency is good, drying can be performed efficiently, and odor generation is extremely reduced. . Further, the waste does not stick to the inner peripheral wall of the chamber. This is because the drying treatment is performed under reduced pressure with a low boiling point using natural oil.

  That is, for example, when noodles such as rice and udon are heated and dried under normal pressure, they are in a dumpling state, the heat conduction efficiency is reduced, and energy loss occurs. In addition, there is a problem in that an offensive odor is generated and safety and operation management are required. On the other hand, these problems can be solved by performing the drying treatment of the waste while introducing the natural oil and the enzyme using a vacuum dryer as in the present embodiment.

  Further, in the present embodiment, although the weight reduction rate of the garbage and the like differs depending on the type of the crushing device 14 and the setting of the final moisture content, since the crushing device 14 and the rotary scraping blade 32 are provided, FIG. As shown, for example, the weight loss rate of garbage can be about 70% or more, and the water content can be 16% or less.

  Note that the present invention is not limited to any of the above-described embodiments, and can be appropriately modified and implemented within the scope of the technical idea of the present invention.

  In the above-described embodiment, the wastewater is mainly described. However, the present invention is not limited to this. For example, as shown in FIG. 3 which is a schematic configuration diagram of a waste treatment system according to another embodiment, Is garbage discharged from a restaurant or kitchen having a high solid content ratio, the waste collected from the collection container 18 is crushed by the crushing device 14, dewatered by the dehydrator 19, and then sent to the decomposition treatment tank 5. Alternatively, a configuration may be adopted in which the disassembly process is performed. This makes it possible to install the present apparatus even in a limited place such as a restaurant or a food factory site without requiring large-scale facilities. Also in this case, according to the test of the inventor, the water content can be reduced to about 10%.

  As still another embodiment, a sludge concentrator (not shown) for condensing sludge by external pressure is provided in place of the dehydrator 19 to decompose organic sludge discharged from a factory or the like. can do.

FIG. 1 is a schematic configuration diagram of a waste treatment system according to an embodiment of the present invention. 1 is a flowchart of a waste disposal system according to one embodiment of the present invention. The schematic block diagram of the waste processing system concerning other embodiment of this invention. The figure which shows the structure of the vacuum dryer which concerns on other embodiment of this invention. The figure which shows the weight loss rate of the garbage etc. by the vacuum dryer which concerns on other embodiment of this invention, and a water content.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 sedimentation adjustment tank 3 aeration tank 4 sedimentation tank 5 decomposition treatment tank 8 return path 10 return device 11 dehydration tank 15 stirrer 17 dehydrator 21 vacuum chamber 23 steam boiler 27 vacuum pump 30 natural oil input device 31 enzyme input device 32 Feather

Claims (10)

Storing waste in the storage area;
Injecting a solvent containing a terpene into the stored waste,
Injecting an enzyme containing α-amylase into the stored waste,
Stirring the waste into which the solvent and the enzyme have been charged. The waste disposal method according to claim 1,
The method according to claim 1, wherein the solvent contains at least one of D-limonene and pine oil. The waste disposal method according to claim 1,
The waste treatment method according to claim 1, wherein the waste is kitchen garbage composed of a single material or a plurality of materials. A storage unit for storing waste,
First charging means for charging a solvent containing a terpene to the storage unit;
Second charging means for charging an enzyme containing α-amylase to the storage unit;
A stirring means for stirring the waste, the solvent, and the enzyme stored in the storage section. The waste disposal device according to claim 4,
The waste treatment apparatus according to claim 1, wherein the solvent includes at least one of D-limonene and pine oil. The waste disposal device according to claim 4,
The waste treatment apparatus according to claim 1, wherein the waste is kitchen waste composed of a single material or a plurality of materials. A biological treatment apparatus for biologically treating waste with microorganisms,
From the organic sludge subjected to biological treatment by the biological treatment device, a sedimentation device that precipitates excess sludge containing an esoteric substance,
A waste treatment system, comprising: the waste treatment device according to claim 4 for decomposing excess sludge settled by the sedimentation device. The waste treatment system according to claim 7,
A storage device for storing waste discharged to the biological treatment device,
A dewatering device for dewatering the precipitated excess sludge,
A waste treatment system, wherein excess sludge dehydrated by the dehydrator is transferred to a decomposition treatment tank to reduce the volume of sludge. A drying device for drying waste, comprising:
A drying apparatus comprising: means for mixing the waste with a natural oil and an enzyme and subjecting the waste to heat treatment under reduced pressure. A drying method for drying waste, comprising:
Mixing the waste with natural oils and enzymes,
A drying method comprising subjecting these to heat treatment under reduced pressure.

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