JP2001104924A - Method and apparatus for treating waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decompose polymer waste such as used rubber gloves efficiently. SOLUTION: In an apparatus for treating waste, after waste is melted by heating it by a heat source such as a heater, the molten waste is mixed with microorganisms, and the mixture is agitated, and the waste is decomposed by the microorganisms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment method and a waste treatment apparatus for decomposing a waste mainly composed of a polymer material such as rubber gloves using a microorganism.

[0002]

2. Description of the Related Art Garbage such as vegetables and fish can be relatively easily decomposed by using microorganisms, as shown in, for example, Japanese Patent Application Laid-Open No. 9-174026. In the case of the rubbers described above, there is a problem that it is difficult to decompose even if the microorganisms are mixed and fermented as they are.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to decompose waste such as rubber gloves in a shorter time and more efficiently.

[0004]

According to the present invention, wastes are heated and melted by a heat source such as a heater, and then the melted waste and microorganisms are mixed and stirred to decompose the wastes with the microorganisms. It consists of

[0005] The present invention is also directed to a method in which waste and microorganisms are charged into a treatment tank, and the waste and microorganisms are stirred by stirring means provided in the treatment tank, and the waste is decomposed by the microorganisms. , A heater is disposed above the treatment tank to heat and melt the waste to a predetermined temperature and then drop into the treatment tank.

Further, according to the present invention, a heater is disposed at a substantially mortar-shaped heating tank, a heater for heating the heating tank to a predetermined temperature, and substantially at the center of the heating tank, and the wastewater is treated while being compressed. And a screw provided with a spiral wing to be conveyed into the tank.

Further, according to the present invention, a plurality of spherical members made of a hard material such as ceramic are disposed in a processing tank, or the spherical members are made of a porous material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described first with reference to FIG. 1. Reference numeral 1 denotes an apparatus main body, which forms a bottomed rectangular cylindrical processing tank 2 having a U-shaped bottom on one side. In addition, a storage chamber 3 is defined at the bottom on the other side, and an exhaust treatment tank 4 is defined above the storage chamber.

Reference numeral 5 denotes a stirring means mounted in the processing tank 2, a rotating shaft 7 having both ends supported in a substantially horizontal direction by a pair of bearings 6, 6, and a stirring blade 8 fixed around the rotating shaft. And a motor 11 that is installed in the storage chamber 3 and drives the rotary shaft 7 to rotate via a belt 9 and a pulley 10.

Reference numeral 12 denotes an exhaust hole opened on the upper side wall of the processing tank 2, and an exhaust hole 13 opened at the tip is provided with an exhaust duct opened in the water of the deodorized treatment water 14 stored in the exhaust processing tank 4. 15 and an exhaust fan 16 is mounted in the exhaust duct.

The treated water 14 is charged with an effective microbial complex, which is mainly composed of aerobic Bacillus subtilis (Bacillus sp.) And is blended with other bacteria for deodorization. As the odorous substances in the exhaust gas, ammonia, methyl mercaptan, hydrogen sulfide, methyl sulfide, methyl disulfide, trimethylamine, acetaldehyde, styrene, propionic acid, normal butyric acid, normal valeric acid, isovaleric acid, toluene, xylene, methyl There are isobutyl ketone, ethyl acetate, isobutanol, propionaldehyde, isovaleraldehyde, isobutyraldehyde, normal valeraldehyde, normal butyraldehyde, etc., and a bacterium that decomposes these is used.

A panel heater 18 in which a heater 17 such as a sheathed heater is embedded is mounted on the outer bottom wall surface of the processing tank 2, and the temperature in the processing tank 2 is measured by a temperature sensor such as a well-known thermistor (not shown). Detected and controlled for electricity, waste-treating microorganisms that blend yeast and other bacteria according to the type of waste, mainly for aerobic Bacillus subtilis (Bacillus subtilis), etc. Is configured to control the heating to a temperature at which the cells easily grow.

Further, an exhaust fan 19 for exhausting exhaust gas generated from the surface of the treated water is provided on the upper surface of the exhaust treatment tank 4 for storing the treated water 14.

Reference numeral 19 denotes a heater disposed on the upper portion of the processing tank 2, which has a substantially mortar shape and has a heater 20 such as a sheathed heater mounted on an outer wall surface thereof, and has an outlet 21 opened at a substantially central portion of the bottom surface. A heating tank 22 and a screw 25 provided at a substantially central portion in the heating tank and provided with a spiral wing 24 which is rotationally driven directly by a motor 23 or indirectly through a gear, a belt, or the like. Make up.

Reference numeral 26 denotes an inlet for introducing waste such as rubber gloves into the heating tank 22 of the heater 19, and an inclined bottom so that the waste can be smoothly carried into the screw 25. A wall 27 is provided.

When the heater 25 is energized to heat the side wall and the inside of the heating tank 22 to a predetermined temperature (for example, about 200 ° C.) suitable for melting the waste, the screw 25 is rotated. When the heater 17 is energized, the inside of the processing tank 2 is heated to a temperature suitable for the growth and propagation of microorganisms (for example, 35 to
45 ° C., 50-70 ° C. for rubber gloves), and while operating the motor 11 to rotate the stirring blade 8, the inlet 26
By throwing waste such as rubber gloves into the heating tank 22, the waste is heated and melted, becomes jelly-like, is separated from the side wall of the heating tank 21 by the screw 25, and is extruded from the outlet 21. After falling into the treatment tank 2, the mixture is agitated by the stirring blades 8, mixed with microorganisms previously disposed in the treatment tank 2, and decomposed by the microorganisms.

The odor generated by the decomposition of the waste is passed through the exhaust hole 12 by the exhaust fan 16 and the treated water 1 is discharged.
The exhaust gas is exhausted into the exhaust water 4 and deodorized by the bacteria in the treated water.

As a result, polymer waste such as rubber gloves, which are relatively hard to decompose, can be decomposed in a relatively short time.

FIG. 2 shows another embodiment of the present invention.
A plurality of spherical members 28 made of a porous material such as ceramic or sintered metal are disposed at the bottom of the processing tank 2. At the same time as adhering to the surfaces of the spherical members 28, these spherical members are stirred by the stirring blade 8, and the spherical members 28
・ ・ Wastes adhering to the surface due to contact with each other can be crushed, and decomposition by microorganisms can be promoted to shorten the decomposition time.

The shape of the spherical members 28 may be any other shape such as an oval or conical shape which does not affect the rotation of the stirring blade 8.

[0021]

According to the constitution of the present invention, after the waste is heated to a predetermined temperature and melted, mixed with microorganisms and decomposed by the microorganisms, the waste is crushed by a conventional knife, etc. The polymer waste can be decomposed in a shorter time than in the case of decomposing by a microorganism.

Further, according to the structure of the present invention, a heater for heating and melting the waste is disposed above the treatment tank for mixing and stirring the waste and the microorganism, so that the waste is melted by the heater. The decomposition treatment can be performed in the treatment tank while the waste can be decomposed more efficiently.

According to the structure of the present invention, the heater for melting the waste is constituted by a substantially mortar-shaped heating tank, a heater for heating the heating tank, and a screw for conveying the waste to the treatment tank. In addition, the waste can be efficiently melted and sent to the treatment tank while preventing the molten waste from adhering to the side wall of the treatment tank.

Further, according to the structure of the present invention, by disposing a plurality of spherical members in the treatment tank, the molten waste is attached to the surface of the spherical member, and then the spherical member is stirred by the stirring means. Thus, it is possible to promote the mixing of the waste and the microorganisms, and at the same time, to more efficiently crush and decompose the waste.

According to the structure of the present invention, since the spherical member is formed of a porous material, the spherical member can be used as a bed of microorganisms, and the microorganisms and waste can be efficiently mixed. is there.

[Brief description of the drawings]

FIG. 1 is a front vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a front vertical sectional view showing another embodiment.

[Explanation of symbols]

 2 Treatment tank 5 Stirrer 11 Motor 19 Heater 20 Heater 24 Spiral blade 25 Screw 28 Spherical member

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[Procedure amendment]

[Submission date] December 9, 1999 (1999.12.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

Further, an exhaust fan 16 ' for exhausting exhaust gas generated from the surface of the treated water is provided on the upper surface of the exhaust treatment tank 4 for storing the treated water 14.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

The odor generated by the decomposition of the waste is passed through the exhaust hole 12 by the exhaust fan 16 and the treated water 1 is discharged.
After being exhausted into the inside 4 and deodorized by the bacteria in the treated water, it is exhausted outside by an exhaust fan 16 ' .

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

Continuation of the front page (72) Inventor Takashi Moriwaki 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Electric Co., Ltd. (72) Inventor Noriaki Hirano 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Electric Tottori (72) Inventor Teruo Okuda 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture F-term (reference) 4D004 AA11 CA15 CA19 CA29 CA48 CB05 CB27 CB28 CB32 CC07 DA02 DA06

Claims (5)

[Claims] 1. A waste treatment method comprising: melting waste by heating the waste with a heat source such as a heater; mixing and stirring the waste with the microorganism; and decomposing the waste with the microorganism. 2. A waste and microorganisms are charged into a treatment tank,
The waste and the microorganisms are stirred by the stirring means provided in the treatment tank, and the waste is decomposed by the microorganisms. In the above-described treatment tank, the waste is heated to a predetermined temperature and melted. A waste treatment apparatus, further comprising a heater that falls into the treatment tank. 3. The heating device according to claim 1, wherein the heating device is a substantially mortar-shaped heating tank.
A heater for heating the heating tank to a predetermined temperature and a screw provided with a spiral blade disposed substantially at the center of the heating tank and transporting waste into the processing tank while compressing waste. The waste disposal apparatus according to claim 2, wherein 4. A plurality of spherical members made of a hard material such as ceramic are disposed in the processing tank.
The waste disposal device according to claim 2. 5. The waste disposal apparatus according to claim 3, wherein said spherical member is made of a porous material.