JPH11347526A - Filler for organic waste decomposing apparatus and decomposition method and apparatus using filler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filler for an organic waste decomposing apparatus which decomposes garbage, organic industrial waste, and other organic waste in a short time and a decomposition method and apparatus using the filler. SOLUTION: In an organic waste decomposing apparatus, in a closed casing which has an organic waste inlet 2 in the upper part and whose bottom surface is an arc cross section along the rotational locus of an agitation blade, the rotary agitation blade pivoted between both end wall surfaces of the casing is installed, in the agitation blade, lots of hollow branch blades 4a are installed radially from the rotary shaft to make communication/ventilation possible, an air supply duct is installed to the upper part of the casing so that hot air can pass along a humidity adjusting cock 6 and the inner wall, and an exhaust duct 9 and deodorization apparatus 10 are installed in the casing. In a method for decomposing organic waste, organic wastes and a hollow filler are charged into this decomposing apparatus and decomposed by aerobic high temperature bacteria.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention decomposes household waste, organic industrial waste, marine residues, sewage sludge, manure sludge, and other organic waste (abbreviated as organic waste in the present invention) in a short time. Waste decomposition apparatus and a decomposition method using the same.

[0002]

2. Description of the Related Art Organic waste has been disposed of by burning, landfilling, dumping into the ocean, etc. Recently, when incinerated, dioxin generation has been pointed out. The problem is that marine dumping is becoming impossible to implement in any case, such as a total ban under the Convention. Accordingly, recently, many organic waste decomposition treatment apparatuses utilizing microorganisms have been proposed. For example, a method of supplying air from the bottom as well as stirring to increase the activity of decomposing microorganisms has been studied. In addition, mixing of organic wood with porous wood chips to which microorganisms easily adhere is also performed (for example, Japanese Patent Application Laid-Open No. H8-109086).

[0003]

As a result of various studies on the decomposition of organic wastes, the present inventors have found that there is a problem that cannot be solved by simply stirring or supplying air from the lower part to the upper part as in the conventional apparatus. It has been found. One of the problems relates to the water content of organic waste. Among the organic wastes, garbage left in the cafeteria and garbage waste, marine residues, and manure sludge have a very large amount of water. If the air supplied from the bottom simply rises as in the prior art, it takes a long time to adjust the moisture content to a level suitable for microbial degradation in advance of hydrolysis. Although some water absorption is observed by adding wood chips and the like, it cannot be dealt with sufficiently. Also, facilities such as cafeterias generate the above-mentioned garbage that must be disposed of every day, so it is necessary to continuously dispose of it.However, the decomposition rate of conventional organic waste decomposition equipment is slow. Or it does not completely disassemble, so it has not been possible to meet the demands sufficiently. Therefore, the present inventor studied a filler for an organic waste decomposition treatment apparatus capable of decomposing garbage having a high moisture content in a short time and at low cost, an apparatus using the same, and a decomposition method. In particular, it has been studied to provide a device that can be used continuously, can easily dispose of the residue after the decomposition treatment, and can be easily maintained.

[0004]

As a result of examining the above-mentioned problems, it is a filler used for microbial decomposition of organic waste while being stirred in a container, and has a strength to withstand abrasion during stirring, In addition, it has a hollow structure that allows organic waste to enter and exit.

[0005] The term "organic waste" as used herein refers to garbage such as cooking waste and garbage in homes and restaurants, organic industrial waste from food processing factories, residues of livestock and marine products, sewage sludge, excreta sludge and other microorganisms. Decomposed and digested. The strength to withstand abrasion during agitation means that the filler of the present invention is considered to have sufficient abrasion on the organic waste decomposition treatment apparatus casing, agitating blades, the fillers, the organic waste, etc., which are considered to come into contact during the agitation. (Friction) strength. The filler of the present invention having such properties is preferably a plastic such as polypropylene, polycarbonate, or FRP. In addition, metal can also be used, and the granular molded brick is slightly worn as compared with plastic or metal. Can be used except for the weak points. When the filler added to the organic waste is almost dry, a ratio of about 1: 1 to 1: 1.3 gives a good result on the moisture absorption and the progress of the accompanying microbial decomposition. The shape is preferably a hollow pipe. The cross-sectional shape of the pipe is not particularly limited as long as it can maintain a hollow inside such as a circle or a polygon having a triangle or more. The diameter of the pipe depends on the nature of the organic waste to be treated.
~ 30mmφ, length 8 ~ 30mm is preferable, and more preferable is
It is 10 to 15 mφ and 10 to 15 mm in length.

[0006] In the case of wood chips, when a decomposition test of organic waste was conducted, the effect of accelerating the decomposition was hardly apparent.
It takes time to completely disassemble. In this regard, it has also been confirmed that simply increasing the space for holding microorganisms by making it porous cannot significantly reduce the time until complete decomposition. Therefore, the present inventor has developed a hygroscopic inorganic sintered body,
Although it was possible to shorten the decomposition time, in subsequent practical use tests, hygroscopic inorganic sintered bodies such as bricks were weak to wear,
It has also been found that wear is severe. Therefore, a plastic hollow pipe made of the above-mentioned polypropylene, polycarbonate, FRP or the like was developed as a filler for an organic waste decomposition treatment apparatus which is resistant to abrasion and can reduce the time for microbial decomposition.

[0007] With such a hollow structure, organic waste enters and exits during decomposition, so that the organic waste is fragmented each time it enters and exits, and the air in the filler is contained in the organic waste. Supplied, conditions suitable for the evaporation of water and microbial degradation are given, and digestion in a short time becomes possible. In addition, by using a filler having a strength enough to withstand abrasion during stirring, the organic waste decomposition treatment apparatus can be continuously used for a long period of time.

[0008] The organic waste decomposition treatment apparatus is provided with a rotary stirring blade which is rotatably supported between both end surfaces of the casing in an enclosed casing having an arcuate cross-section along the rotation locus of the stirring blade having an organic waste inlet at the top. The rotary stirring blades are provided with a number of hollow branch blades radially from a hollow rotary shaft to allow communication and ventilation, and a humidity control faucet is provided at an upper part of the casing and an air supply duct is provided so that warm air is along the inner wall, and The casing is provided with an exhaust duct and a deodorizing device for air in the duct.

Further, a filler is put together with the organic waste into the organic waste decomposition treatment apparatus, and air is supplied from a number of radially branched blades while stirring with a rotary stirring blade, and air is also supplied from an air supply duct. Then, an organic waste decomposition treatment method is characterized in that the temperature or humidity of the supply air is adjusted to decompose by an aerobic thermophilic bacterium in the casing. The temperature when decomposing with an aerobic thermophilic bacterium is preferably 40 to 75 ° C, more preferably 55 to 70 ° C. In such a high-temperature region, when the filler is an inorganic sintered body, far-infrared radiation is considered,
It is conceivable to further promote microorganisms by aerobic thermophilic bacteria. Preferably, the moisture is kept between 40 and 60%. In this range
Completely decompose organic waste within 24 hours. Since the inorganic residue after decomposition is 1 to 2%, it can be used again even after continuous operation if it is washed and removed about once a week.

[0010]

1 to 3 show a filler for an organic waste decomposition treatment apparatus according to the present invention.
15 is a perspective view of FIG. The example of FIG. 1 is cylindrical and has a hollow portion 17 inside which organic waste 16 can enter and exit. The wall thickness is 1 mm and the diameter is 10 mm. The length is 10 mm. The material is made of polypropylene which is hard to wear. As shown in FIG. 2, a small hole 18 provided in a cylindrical wall also has a function of retaining microorganisms by the small hole, and the hollow portion 17 allows the organic waste 16 to enter and exit inside because the hollow portion 17 is provided. FIG. 3 shows an example of the filler 15 for an organic waste decomposition treatment apparatus of the present invention having a hollow section 17 having a square cross section. In this example, as in the previous examples, the hollow portion 17 allowing the organic waste 16 to enter and exit the inside is also provided.
There is. It is made of FRP.

Filler for organic waste decomposition treatment apparatus of the present invention
15 can be used by filling it together with organic waste in any organic waste decomposer using microorganisms. FIG. 4 shows an example. (a) shows a state in which about half of the organic waste to be injected into the inside of the tubular casing 1 of the decomposition apparatus is filled, and the organic waste is charged therein. (b) shows a state during stirring, in which organic wastes such as vegetable waste, fish produced in a supermarket, garbage and the like are 45 to 60.
In the example in which the high-temperature fermentation at a temperature of ° C. is performed, small viscous substances are aggregated in about one hour, and are fragmented while entering and leaving the hollow portion 17 of the filler 15 for the organic waste decomposition treatment apparatus. After about 15 hours shown in (c), only the filler 15 is present at the bottom in the organic waste decomposition treatment apparatus, and the organic waste has been digested. Degradation is possible when organic waste is charged again. This is 10 hours shorter than in the case of the filler without the hollow portion 17.

FIG. 5 is a detailed perspective view of an organic waste decomposition treatment apparatus according to the present invention, FIG. 6 is a sectional view taken along line AA in FIG. 5, and FIG. 7 is a line BB in FIG. FIG. 8 is a flow chart showing the process of the disassembly process. As shown in these figures, the organic waste decomposition treatment apparatus of the present invention is provided with an organic waste input port 2 at the top of a closed casing 1 having a double-walled and heat-insulating structure, and a bottom surface 3 with a stirring blade 4. The cross section is a circular arc along the rotation trajectory. In the closed casing 1, a stirring blade 4 is provided between the wall surfaces of both ends of the casing.
The stirring blades 4 are provided with a large number of hollow branch blades 4a radially from a hollow rotary shaft 5 and communicate with each other so as to be able to ventilate into the decomposition chamber. The hollow branch blade 4a is provided with a ventilation hole 4b. A faucet 6 is provided at the upper part in the casing, and can be used for moisture adjustment or cleaning. Humidity control is used to accelerate the decomposition of organic waste when it is difficult to decompose microorganisms in a dry state. Further, an air supply duct 8 is provided so that warm air follows the inner wall 7, and warm air is supplied to the decomposition chamber from a discharge port provided in the inner wall through a space provided in the double wall of the casing 1, and Exhaust duct 9 at the top of casing 1
And a deodorizing device 10 for adsorbing and removing malodorous components of air in the duct. A drain duct / suction port 12 for draining washing water or sucking and removing residues is provided at a lower portion of the casing. Air is supplied to the hollow rotary shaft 5 from an external compressor 11.

Since the organic waste decomposition treatment apparatus of the present invention has such a structure, while supplying air into the decomposition chamber in the apparatus casing from the ventilation holes 4b of the rotating hollow branch blades 4a, the apparatus follows the inner wall surface. Supply warm air and heat from the surroundings,
Exhaust gas containing a malodor generated by decomposition can be deodorized by a deodorizing device. When the operation is performed with the filler put in the decomposition chamber 13, the organic waste can be continuously decomposed.

Embodiment of Decomposition Method FIG. 8 shows a flow chart of the decomposition process. An embodiment in which organic waste is introduced into the apparatus and decomposed by the apparatus of the present invention will be described in detail. (a) decomposing chamber 13 internal to the average particle diameter of 15mm hygroscopic filler of an inner volume of 1.7 m ³ (the polypropylene hollow tip) 15 Prepare a thing is 0.5 m ^3, and this occurred in the cafeteria animals and plants Organic waste of mixed quality was introduced from 0.5 m ³ organic waste inlet 2.

Next, (b) while pressing the operation start button of the control panel 14 provided on the side of the apparatus to rotate the stirring blade 4, air is supplied from the ventilation hole 4b (see FIG. 6) of the hollow branch blade 4a, Further, air at 60 ° C. was supplied from the air supply duct 8 along the wall surface at an air supply rate of 10 m ³ / min. When stirring was continued for 5 hours in this state, the contents became viscous due to high-temperature decomposition.

When the stirring was continued for about 16 hours, the decomposition was completely carried out, and an odorless residue of about 5% by volume of the organic waste became a powder and only remained together with the filler. In this state, the decomposition chamber can be returned to the original state only by washing with water and draining the water from the drain duct. In the case where the organic waste generated before washing was added one after another, it could be used continuously for one week.

The apparatus of the present invention electrically controls the rotation of the stirring blade 4, the operation of the compressor 11 for supplying air to the hollow branch blades 4a, and the warming of warm air supplied along the inner wall surface by the control panel 14. Unmanned operation can be performed by removing the bad smell generated by the decomposition with a deodorizing device. If the residue is also washed and removed periodically and automatically, the user can dispose of the organic waste simply by inputting it.

[0018]

According to the present invention, it has become possible to provide a filler for an organic waste decomposition treatment apparatus which can be used for a long period of time and which can decompose microorganisms in a short time. By using the filler for an organic waste decomposition treatment apparatus of the present invention in a conventionally used organic waste decomposition treatment apparatus, the decomposition treatment capacity can be increased. Since it can be used for continuous decomposition, the operation rate of the decomposition processing apparatus can be increased.

Further, it is possible to provide a filler for an organic waste decomposition treatment apparatus which can decompose garbage having a high moisture content in a short time and a decomposition treatment method using the same. This apparatus can perform a continuous decomposition treatment by using the filler of the present invention, and can dispose of the residue after the decomposition treatment by easy means such as disposal into wastewater or suction removal by a suction device.
Since it can be operated unattended, low-cost disposal of organic waste is made possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filler for an organic waste decomposition treatment apparatus of the present invention.

FIG. 2 is a perspective view of a filler for another organic waste decomposition treatment apparatus of the present invention.

FIG. 3 is a perspective view of a filler for another organic waste decomposition treatment apparatus of the present invention.

FIGS. 4A to 4C are cross-sectional views of an organic waste decomposition treatment apparatus showing a state in which organic waste is decomposed using the filler of the present invention.

FIG. 5 is a perspective view of the organic waste decomposition treatment apparatus of the present invention.

FIG. 6 is a sectional view taken along the line AA in FIG. 5;

FIG. 7 is a sectional view taken along the line BB in FIG. 6;

FIG. 8 is a flowchart showing a process of a decomposition process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed casing 2 Organic waste inlet 3 Bottom 4 Stirrer blade 4a Hollow branch blade 4b Vent hole 5 Rotating shaft 6 Water faucet 7 Inner wall 8 Air supply duct 9 Exhaust duct 10 Deodorizer 11 Compressor 12 Drain duct and suction port 13 Disassembly Room 14 Control panel 15 Filler for organic waste decomposition equipment 16 Organic waste 17 Hollow 18 Small hole

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C12N 1/00 C12N 1/20 F 1/20 B09B 3/00 D

Claims (4)

[Claims] 1. A filler used for microbial decomposition of organic waste while stirring in a container, which maintains strength to withstand abrasion during stirring and allows organic waste to enter and exit inside. A filler for an organic waste decomposition treatment apparatus, characterized by having a hollow structure. 2. A rotary stirring blade which is rotatably supported between both ends of a casing in an enclosed casing having an organic waste input port at an upper portion and an arc-shaped cross section whose bottom surface follows the rotation trajectory of the stirring blade. Is provided with a large number of hollow branch blades radially from the hollow rotary shaft to allow communication and ventilation, and a humidity control faucet at the top of the casing and an air supply duct so that warm air is along the inner wall,
Further, an organic waste decomposition treatment apparatus comprising an exhaust duct and a deodorizing device provided in the casing. 3. The organic waste decomposition treatment apparatus according to claim 2, wherein the filler according to claim 1 is put together with the organic waste, and air is supplied from a number of radial hollow branch blades while stirring with a rotary stirring blade. And a method for decomposing organic waste by supplying air also from an air supply duct, adjusting the temperature or humidity of the air supply, and decomposing the air by aerobic thermophilic bacteria in a casing. 4. The decomposition temperature of the aerobic thermophilic bacterium is 50 to 50.
The method for decomposing organic waste according to claim 3, wherein the temperature is 70 ° C.