JP2007055826A - Composting device and composting method for household garbage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive composting device with a simple structure which can suitably retain an environment where aerobic bacteria are easily propagated, and also has reduced troubles, and to provide a composting method therefor. <P>SOLUTION: The composting device for household garbage is equipped with: a fermenter in which a cylindrical circumferential wall is arranged around a horizontal rotary shaft, and which is provided with vent holes; and a supporting stand for freely rotatably supporting the rotary shaft of the fermenter, and the fermenter comprises: a freely openable/closable cover at a part of the circumferential wall; and two or more tandems of screw blades in which the rotating direction is inverted at the inside face of the circumferential wall. In the composting method for household garbage, kitchen garbage is charged to the fermenter of the composting device charged with a composting base containing aerobic bacteria and using a crushed wood as a substrate, and newly charged kitchen garbage present at the inside of the fermenter and the composting base are stirred by the forward/backward rotation of the fermenter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a composting apparatus and a composting method for household waste.

  Garbage discharged from homes, etc. will be collected in large quantities and incinerated or buried, or mass composted as disclosed in the following Patent Document 1 to Patent Document 3, All of them generate fumes, bad odors and harmful substances, which are environmental health problems. Therefore, there is a growing momentum in each household to reduce the amount of garbage by composting garbage.

JP-A-7-215788 JP-A-11-130571 JP2003-155109A

  However, there are many methods of composting garbage that exist today, for example, a method of depositing garbage in the composition, where moisture accumulates in the lower layer, making it difficult for the garbage to touch the outside air. It becomes. Such an environment is an environment preferred by anaerobic microorganisms that cause odor generation, and is an environment in which aerobic microorganisms that promote fermentation to composting are difficult to propagate (see Patent Document 4 below), and decay of garbage As a result, flies gather and give off a foul odor, which reduces the living environment and makes it unsuitable for home use.

  Although a technique for creating an environment in which aerobic microorganisms are easy to propagate as in the technique disclosed in Patent Document 4 has been introduced, it is excessively large as a composting technique for home use, is expensive, and has a power supply. It is presumed that not only the initial cost and the running cost increase, but also the maintenance management is complicated.

  Although the following patent document 5 is mentioned as a prior art which prevents a bad smell in the composting apparatus and method of household waste, it says that the stirring mode of garbage etc. in a fermenter cannot be adjusted freely with the said agitator small stick. There's a problem. Experience has shown that microorganisms often propagate in areas where fermentation is progressing and prey on garbage, so if there is no agitation that can be adjusted so that the microorganisms propagated in areas where fermentation is not progressing, they will propagate. In addition, the efficiency of composting is poor.

JP-A-9-30882 JP2003-155109A

  The present invention has been made in view of the above circumstances, and can favorably maintain an environment in which aerobic microorganisms are easy to propagate while having a simple structure, and is less likely to cause composting of household waste with less failure. The purpose is to provide a device and composting method.

  A composting apparatus for household waste according to the present invention made to solve the above-mentioned problems is a fermenter provided with a cylindrical peripheral wall around a horizontal rotating shaft and provided with a vent hole, and the rotating shaft of the fermenter. The fermenter has a lid that can be opened and closed on a part of the peripheral wall, and a plurality of screw blades whose turning directions are reversed on the inner surface of the peripheral wall. It is characterized by. It is desirable that a handle for transmitting rotational force is appropriately attached to the fermenter. Furthermore, it is good also as a structure provided with the odor adsorption | suction means which fills the path | route through which the gas generate | occur | produced in the said fermenter passes through the said vent hole so that the said composting base material can be replaced | exchanged.

  The composting method for household waste according to the present invention made to solve the above-mentioned problems is the composting apparatus according to claim 1, wherein a composting base containing aerobic microorganisms and based on pulverized wood is introduced. The method is characterized in that raw garbage is introduced into a fermenter, and the newly introduced raw garbage present in the fermenter and the composting base are agitated by forward and reverse rotation of the fermenter. In addition, as a composting base containing an aerobic microorganism and using a pulverized wood as a base, the compost described in Patent Documents 6 and 7 previously disclosed by the applicant may be mentioned.

JP-A-3-50174 JP-A-9-2888

  Manufactured at a low cost by a structure that supports a fermenter having a cylindrical peripheral wall rotatably with a horizontal rotation axis, and a structure that includes a plurality of screw blades whose turning directions are reversed on the inner surface of the peripheral wall. Although it is a relatively simple structure that can be made, agitation is easily performed to adjust the microorganisms that have proliferated in the area where fermentation is progressing by adjusting the forward and reverse of the fermenter so that they spread to the part where fermentation progresses poorly. That is, the efficiency of propagation of microorganisms and composting in the fermenter can be increased. Moreover, if it is set as the structure provided with the odor adsorption means which replaces | fills the said composting body as an odor adsorption agent in the path | route through which the gas generated in the said fermenter passes through the said ventilation hole, it will pass the said ventilation hole. The odor of gas can be suitably removed over a long period of time.

Hereinafter, embodiments of a composting apparatus for household waste according to the present invention and a composting method using the same will be described with reference to the drawings.
The example shown to a figure is comprised from the cylindrical fermenter 1 and the support stand 2 which supports it.

  In the center of the both end walls 3 of the fermenter 1, support shafts 4 are provided so as to be able to rotate with a horizontal rotation shaft, and the support shaft 4 is attached to one of the support shafts 4. A handle 5 for rotating and rotating the fermenter 1 connected thereto is mounted. Further, in order to discharge composted products to the outside by putting composting base and raw garbage (hereinafter referred to as raw garbage 7) into a part of the peripheral wall 6 of the fermenter 1. The opening 8 is provided, and a lid 8 that closes the opening is provided so that it can be opened and closed and locked, and a handle 9 is provided as a clue when the lid 8 is opened and closed.

  Further, the peripheral wall 6 (including the lid 8) and the end wall of the fermenter 1 are appropriately provided with a vent hole 10 for discharging the gas generated along with fermentation of the garbage 7 or the like. Accordingly, it is desirable to provide a window for confirming the state of fermentation. In this example, the vent 11 is provided at the center of both end walls, and the window 11 covered with a transparent plate is a lid 8. It is provided in the central part.

  Two screw blades 12, 12 are fixed on the inner surface of the peripheral wall 6 of the fermenter 1, and the screw blades 12, 12 are contrasted with the turning direction reversed at the center in the longitudinal direction of the fermenter 1. Layout. If the fermenter 1 is long, these may be provided over a plurality of stations.

  Accordingly, the ends of each series of screw blades 12 and 12 are connected in a V shape at the center in the longitudinal direction of the fermenter 1, and the fermenter 1 is rotated in the tip direction of the V-shaped portion 13 as shown in FIG. 3. Then, the garbage 7 or the like as the contents is collected in the direction of the end of the fermenter 1 and stirred in two at the end, and conversely, the orientation of the tip of the V-shaped portion 13 as shown in FIG. If it rotates reversely, all the garbage etc. 7 will be collected in the center part of the said fermenter 1, and will be stirred as one unit in the center part. In this way, by adjusting the rotation direction and rotation amount of the fermenter 1 as appropriate, for example, when fermentation is concentrated in the central part, all the raw garbage 7 is collected and stirred in the central part. Further, it is further reversed so that the garbage 7 and the like are evenly arranged over the full width of the fermenter 1 (see FIG. 3 (B) or FIG. 4 (B)). Various adjustments are possible for position and quantity.

The support base 2 includes a support column 14, a leg portion 15, and a product discharge shooter 16.
The support column 14 is made of a steel material having a uniform U-shaped cross section over its entire length, and has a shape provided with side plate portions on both sides of the back plate portion in contrast. A pair is provided symmetrically, and a bearing portion 17 that rotatably supports the rotating shaft of the fermenter 1 is provided above the pair. The bearing portion 17 is a bearing that is formed by cutting the upper end of the back plate portion into a U-shape and mounting the support shaft 4 of the fermenter 1 on each of the left and right bearings. By mounting the ring-shaped bush on the support shaft 4 of the fermenter 1, the rotational position of the fermenter 1 is stabilized and also prevents detachment.

  The steel members 18 and 18 having an L-shaped cross section are fixed to the lower portions of the pair of struts 14 in contrast to each other so as to be inclined downward, and the lower ends of the steel members 18 and 18 are connected to each other by a flat steel member 19. Part 15 is formed. The upper end of the leg 15 is fixed to the end of the horizontal beam 20 made of the U-shaped steel material, which is passed between the pair of columns 14, and the columns 14 and 14 are connected to each other. A shooter 16 for discharging the product is mounted on an upper portion of the horizontal rail 20 that is directly below the opening of the fermenter 1 so as to be swingable through a butterfly plate.

  The shooter 16 is formed by forming a flat plate into a U-shape and forming a pair of guide walls erected at right angles on both sides of the flat sliding floor 21. A reinforcing frame 22 is fixed to the rear surface of the sliding floor 21 at both left and right ends, and an adjustment guide plate 23 for adjusting the inclination of the shooter 16 is fixed to a part of the reinforcing frame 22. The adjustment guide plate 23 is provided with an arc-shaped long hole 24, and a bolt hole is provided in the adjustment holding plate 25 fixed to the adjustment guide plate 23 of the horizontal rail 20 at a position where it slides. Yes. Bolts mounted in the bolt holes are also connected to the long holes of the adjustment guide plate, and are connected to the shooter 16 by fastening means (not shown) such as fastening with a thumbscrew or the like screwed into the bolts. Is adjusted and fixed to a desired inclination angle.

  The household waste composting apparatus according to the present invention is configured as described above, and contains aerobic microorganisms by mixing rice bran as a fermentation accelerator with bark or pulverized wood (hereinafter referred to as bark) as a base. The composting substrate (refer to the above-mentioned Patent Document 6 or the cited patent 7) is introduced, and the daily garbage generated is input to the fermenter 1 of the composting device (as a guideline, the volume ratio composting substrate: raw Garbage = about 10: 1), and implements a composting method of newly introduced raw garbage existing inside the fermenter and the composting base or domestic waste that stirs the already input raw garbage by forward and reverse rotation of the fermenter 1 can do.

  The bark or the like is preferably pulverized by a method that creates a large space so that the microorganisms can live easily. For example, a corrugated sheet-like bark that is pinched and pressed between a pair of gears that mesh with each other and that still holds the bonded state of the fibers is crushed into chips (see Patent Document 6 or Cited Patent 7 above) ).

  As described above, the aerobic microorganisms need a sufficient space for air to propagate. In order to form a space, it is effective that the fermentation target is brought into contact with air to form a void between the particles, and that the composting substrate itself has as many voids as possible. In this way, the composting base having a large number of voids as the composting base is based on the bark or crushed wood.

  Moreover, since bark etc. are carbonized in the process of decomposition and the number of cavities increases, the fermentation process with activated carbon function can be achieved by stirring the bark etc. of the fermentation process with raw garbage with aerobic microorganisms attached. The aerobic microorganisms that absorb the bad smell of raw garbage in fermentation process and prey on precious foods rich in organic matter as nutrients are actively born while preserving the bark in fermentation process for a long time. The decomposition of garbage will continue and composting with less bad odor will be realized.

  By suitably continuing the decomposition of the garbage 7 and the like, heat of 60 ° C. to 80 ° C. is generated in the contents of the fermentation process, and heat necessary for the fermentation is ensured without being supplied from the outside. Excess moisture contained in the garbage by the heat is continuously discharged from the vent 10 together with the gas, and the moisture necessary for fermentation is ensured exclusively from the garbage that is sequentially added. Then, after measuring the fermentation state of the already input raw garbage, if the raw garbage is further added and stirred according to the distribution of the fermentation state by forward and reverse of the fermenter 1, it accumulates in the deep part of the raw garbage 7 and the like. In addition, the diffusion of excess water is promoted, fresh air spreads to every corner of the contents, and appropriate voids are formed in the garbage 7 etc., thereby forming a better environment suitable for fermentation. It will be.

  As a result, in the natural world, composting requiring about 5 to about 15 years can be completed early in about 2 to 4 weeks according to the composting method. When fully composted, it becomes a smooth powdery product. The product is discharged onto the shooter 16 by opening the lid 8 of the fermenter 1 and stored in a container or bag from the lower end of the shooter 16 as necessary. For household use, since it is necessary to input fresh garbage at least once a week, a composting apparatus having a scale capable of composting raw garbage for one week in about one week is required. Incidentally, in the said example, it is set as the fermenter of diameter: 600mm and length: 1000mm, and the height of a spiral wing | blade is set to 50 mm.

  As described above, by creating a favorable environment for the growth of aerobic microorganisms in the fermenter 1, it is possible to compost raw garbage with less offensive odors. Therefore, when adjusting the position and amount of fermentation by forward and reverse of the fermenter 1, odor is discharged from the vent hole 10 provided in the lid 8 of the fermenter 1 or the like.

  Therefore, it is also possible to adopt a structure provided with odor adsorbing means for filling the composting substrate as an odor adsorbent in a path through which the gas generated in the fermenter 1 of the composting apparatus passes through the vent hole 10. Is possible. For example, the inside of the lid 8, the peripheral wall 6, or the end wall 3 provided with the vent hole 10 is filled in such a manner that the composting base can be replaced as an odor adsorbent, and the odor of the gas passing through the vent hole 10 is filled. A structure that can be removed may be used.

  Specifically, a container provided with an opening / closing lid 26 on a rectangular box 28 having a concave bottom wall 27 following the peripheral wall 6 of the fermenter 1 is used as the lid 8, and the opening / closing lid 26 and bottom wall 27 are provided with vent holes 10 respectively. The opening / closing lid 26 is connected to the box body 28 with a butterfly plate, and the opening / closing lid 26 is fixed to the box body 28 with screws that are screwed into the screw holes of the box body 28 in order to maintain the closed state. Has been.

  When a breathable sheet 29 is laid on the bottom wall 27 of the container with the opening / closing lid 26 open, the composting base is filled, and then the breathable sheet 29 is further laid on the composting base and the opening / closing lid 26 is closed. The lid 8 is provided with an odor adsorption function. Activated carbon is widely known as having odor adsorption function, but activated carbon does not have its own nutrition to promote fermentation and it is difficult for new cavities to form in its own composting process. There is a problem that the function disappears in a very short time.

  On the other hand, if the cover 8 is filled with a composting substrate containing aerobic microorganisms by mixing bark or the like as a base and mixing rice bran as a fermentation accelerator, the base of the base is decomposed in the process of decomposition of the base. By adding a carbonization process, a cavity of the substrate is newly formed, and thus the odor adsorption function can be maintained for a relatively long period of time. The composting substrate is in contact with the garbage itself or the odor of garbage in a state where the bark or the like of the fermentation process adheres aerobic microorganisms, and absorbs the malodor of the garbage during the fermentation process. Aerobic microorganisms that prefer and eat foods rich in organic nutrients continue to decompose the garbage attached to the lid 8 positively while preserving bark during the fermentation process over a long period of time. Thus, the bad odor discharged from the fermenter 1 is adsorbed.

  Even when an odor adsorbing means is provided at a place other than the lid 8, if a container for filling the composting substrate as an odor adsorbing agent is laid in the path passing through the vent hole 10, the same thing is provided. Function can be obtained. Examples of the breathable sheet 29 include non-woven fabric and paper, and the material thereof is a compostable material that can be introduced into the fermenter 1 when the composting base is replaced (for example, the corrugated sheet-shaped bark). Etc. Temporarily called decomposition material).

  The compost generated in this way is used as a high-quality and harmless fertilizer in home gardens and the like, and can suppress the expansion of the local waste disposal system and environmental pollution. In this way, the deterioration of the ecosystem is suppressed by the suppression of environmental pollution, so that the so-called primary industry yield can be stabilized and the quality of the harvest can be expected.

It is (A): a top view and (B): a front view which shows an example of the composting apparatus of household garbage by this invention. BRIEF DESCRIPTION OF THE DRAWINGS (A): Side view and (B): Vertical sectional view which show an example of the composting apparatus of household garbage by this invention. It is explanatory drawing which shows an example of the stirring state of raw garbage etc. by an example of the composting apparatus of household garbage by this invention. It is explanatory drawing which shows an example of the stirring state of raw garbage etc. by an example of the composting apparatus of household garbage by this invention. It is (A): a top view and (B): a front view which shows an example of the composting apparatus of household garbage by this invention. BRIEF DESCRIPTION OF THE DRAWINGS (A): Side view and (B): Vertical sectional view which show an example of the composting apparatus of household garbage by this invention. It is explanatory drawing which shows an example of the cover of the fermenter in the composting apparatus of household garbage by this invention.

Explanation of symbols

1 Fermenter, 2 Support base, 3 End wall, 4 Support shaft, 5 Handle, 6 Perimeter wall,
7 garbage, 8 lids, 9 handles, 10 vents, 11 windows,
12 screw wings, 13 V-shaped parts, 14 struts, 15 legs, 16 shuta,
17 bearing parts, 18 steel materials, 19 steel materials, 20 crosspieces, 21 sliding beds,
22 reinforcement frames, 23 adjustment guide plates, 24 long holes, 25 adjustment clamping plates,
26 Opening / closing lid, 27 Bottom wall, 28 Box, 29 Breathable sheet,

Claims (3)

A fermenter having a cylindrical peripheral wall around a horizontal rotating shaft and provided with a vent hole, and a support base for rotatably supporting the rotating shaft of the fermenter,
The fermenter is a household waste composting device having a lid that can be freely opened and closed on a part of the peripheral wall, and a plurality of screw blades whose turning directions are reversed on the inner surface of the peripheral wall.   2. The household waste composting apparatus according to claim 1, further comprising odor adsorbing means for refilling the composting base in a path through which gas generated in the fermenter passes through the vent hole. The garbage is introduced into the fermenter of the composting apparatus according to any one of claims 1 and 2, in which a composting substrate containing aerobic microorganisms and based on pulverized wood is introduced, A composting method for domestic waste in which new input raw garbage present in the fermenter and the composting base are agitated by forward and reverse rotation.

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