JP2017205767A - Landfill treatment method of organic waste and pretreatment facility of organic waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive landfill treatment method of organic wastes capable of effectively shortening a period from closure to disuse of a controlled final disposal site.SOLUTION: In a landfill treatment method of organic wastes including a pretreatment step for performing biological treatment by air-diffusing and water-sprinkling to the organic wastes and a landfill step for performing the landfill treatment of the organic wastes after the pretreatment step, the completion of the pretreatment step is determined by a leachate measurement step for measuring the BOD and COD of the leachate collected from the organic wastes in the pretreatment step, a temperature measurement step for measuring the temperature of the organic wastes, and a completion determination step for performing the completion determination of the pretreatment step based on a BOD/COD ratio calculated from a measured result in the leachate measurement step, and the temperature of the organic wastes measured in the temperature measurement step.SELECTED DRAWING: Figure 3

Description

The present invention relates to an organic waste landfill treatment method and pretreatment equipment .

  The final disposal site may be abolished after closing or landfilling and meeting the abolition standards stipulated by the “Order for Establishing Technical Standards for Final Disposal of General Waste and Final Disposal of Industrial Waste” it can.

  However, the standards for abolition of leachate etc. are very strict, and if the period required from closure of the final disposal site to abolition is long, problems such as an increase in maintenance costs and restrictions on use of the site will arise during that period.

  Therefore, in Patent Document 1, in order to shorten the period from the closing of the final disposal site until it is abolished, air is sent to the waste layer to promote the decomposition of easily decomposable organic substances by microorganisms, and BOD and Until the COD reaches the decommissioning standard A, a method for shortening the decommissioning time of the final disposal site in which the oxidizing agent is divided into a plurality of times and injected into the waste layer has been proposed.

  Patent Document 2 discloses a method of stabilizing waste by washing organic matter and salts contained in the waste by mechanically washing the waste before landfill, A method is shown in which aeration is performed to wash out or insolubilize organic matter, salts, heavy metals, and the like in waste.

JP 2005-224673 A JP 2009-241053 A

  However, when adopting the method described in Patent Document 1, it is not easy to uniformly supply air to the waste layer thickly landfilled at the final disposal site, so unless sufficient air supply equipment is constructed, There was a problem that the abolition time could not be shortened effectively.

  In addition, when adopting the method described in Patent Document 2, it is necessary to pre-process waste before carrying it into the final disposal site, and not only the problem of securing a site for constructing pre-treatment facilities However, there is a problem that the cost of water treatment equipment for treating waste water generated by the pretreatment is increased, and the pretreatment cannot be easily performed.

  Therefore, at present, waste is directly landfilled at the final disposal site without being pretreated. In particular, organic waste brought to the final disposal site, for example, organic sludge with a thermal loss reduction of 15% or more, has poor air permeability and water permeability, and has an aggregate structure in the landfill layer, making the inside anaerobic It becomes a generation source of BOD, COD, TN, etc., brings about deterioration of the quality of raw water to the leachate treatment facility, and hinders the shortening of the abolition time of the final disposal site. Such organic waste includes not only organic sludge but also inorganic sludge having a thermal loss of less than 15%, incinerated ash containing even a small amount of organic matter, and the like.

In view of the above-described problems, the object of the present invention is a low cost that can effectively shorten the period from closure to closure of a managed final disposal site even when a special dedicated site cannot be secured. It is the point which provides the landfill processing method and pre-processing equipment of an organic waste.

To achieve the above object, a first characteristic feature of the landfill method of the organic waste according to the present invention, as described in claim 1 of the appended claims, a landfill method of the organic waste A pretreatment step for performing biological treatment by aeration and sprinkling of organic waste, and a landfill step for landfilling organic waste after the pretreatment step, and ending the pretreatment step, It is obtained from the measurement result of the leachate measurement step for measuring the BOD and COD of leachate collected from the organic waste in the pretreatment step, the temperature measurement step for measuring the temperature of the organic waste, and the measurement result of the leachate measurement step. a BOD / COD ratio lies in that determined by the termination determination step that determines the termination of the pretreatment step on the basis of the temperature of the organic waste that is measured by the temperature measuring step.

When the biological treatment proceeds in the pretreatment step, the temperature of the organic waste rises and the BOD mainly composed of easily degradable organic substances gradually decreases, but the COD mainly composed of hardly decomposable organic substances does not decrease so much. However, when the biological treatment proceeds under good aerobic conditions, the hardly decomposable organic matter is gradually decomposed to reduce the COD, and the temperature of the organic waste is also lowered accordingly. Therefore, by performing the leachate measurement step, periodically measuring the BOD and COD of the leachate to calculate the BOD / COD ratio, and measuring the temperature of the organic waste in the temperature measurement step, The degree of processing progress can be grasped. In the end determination step, the degree of decomposition of the hardly decomposable organic matter is grasped based on the BOD / COD ratio of the leachate and the temperature of the organic waste, and when the preset value is reached, the pretreatment step is ended. The organic waste can finally be landfilled.

In the second feature configuration, as described in claim 2, in addition to the first feature configuration described above, the end determination step has a BOD / COD ratio of approximately 1, and the temperature of the organic waste When the temperature difference between the outside air temperatures is within 20 degrees, it is determined that the preprocessing step is completed.

When the BOD / COD ratio of the leachate becomes approximately 1, and the temperature difference between the organic waste and the outside air is within 20 degrees, it can be appropriately determined that the pretreatment has been completed.

The first characteristic configuration of the organic waste pretreatment facility according to the present invention is the organic waste landfill processing method having the first or second characteristic configuration described above. An organic waste pretreatment facility for carrying out the process, wherein the organic waste before the landfill treatment is placed on the organic waste placed on the placement equipment It is in the point provided with the aeration equipment and watering equipment for sprinkling water and treating it.

Preliminary decomposition treatment of organic matter by microorganisms is performed in an aerobic environment by supplying moisture to the organic waste placed on the mounting equipment by the watering equipment and supplying air by the air diffusion equipment. Promoted. This good aerobic environment efficiently decomposes difficult-to-decompose organic matter into easily-decomposable organic matter, and greatly increases the time until the organic matter contained in the waste landfilled at the final disposal site is decomposed. It will be shortened.

Their to, stray organic matter and salt or the like contained in the waste by water spray is previously removed by washing out, the degree of contamination of the leachate from the waste that is buried in landfills also be improved, the final disposal site It becomes possible to effectively shorten the period from closing to abolition.

In the second characteristic configuration, as described in claim 4, in addition to the first characteristic configuration described above, the installation equipment is integrally formed in a region excavated so as to partition a section of the ground surface. A side wall and a floor slab, and a ventilation member that covers a ventilation pipe as the air diffusion equipment disposed on the floor slab, and the organic waste is placed on an upper layer of the ventilation member. It is in the point which is constituted so that.

A side wall and a floor slab are integrally formed in a section where the ground surface is excavated, and a ventilation pipe as a diffuser is arranged on the floor slab, and the ventilation pipe is covered with a ventilation member to construct a mounting equipment. The The organic waste and inoculum support placed above the ventilation member are uniformly supplied with the air for aeration supplied from the ventilation pipe through the ventilation member, so that the organic waste is wet. Even when the resistance to ventilation is high, the diffused air is properly supplied to organic waste without passing through the floor slab and leaking into the ground, and the biological treatment proceeds smoothly. .

As described above, according to the present invention, even when a special dedicated site cannot be secured, an inexpensive organic material that can effectively shorten the period from the closure to the abolition of a managed final disposal site. It has become possible to provide a landfill treatment method and pretreatment equipment for radioactive waste.

Illustration of final disposal site (A) is a plan view of the final disposal site where the pretreatment facility is first installed, (b) is a cross-sectional view thereof, (c) is a plan view of the final disposal site where the pretreatment facility is relocated, and (d) is a plan view of the final disposal site. The same sectional view, (e) is a plan view of the final disposal site where the pretreatment facility has been relocated, and (f) is the sectional view (A), (b) is explanatory drawing of 1st embodiment of pre-processing equipment. Explanatory drawing of equipment attached to pretreatment equipment Cross section of drilling type pretreatment equipment (A)-(d) is piping explanatory drawing of 3 A of ventilation pipes. (A)-(f) is explanatory drawing of the planar shape of the mounting equipment which comprises pre-processing equipment.

Hereinafter, embodiments of a landfill processing method and pretreatment equipment according to the present invention will be described.
FIG. 1 shows the structure of a closed type (also referred to as “cover type”) managed final disposal site. Managed final disposal sites (hereinafter sometimes referred to simply as “final disposal sites”) are established and operated in accordance with the structural standards and maintenance management standards stipulated in the Waste Disposal and Cleaning Act. Stipulated in
1504496677862_0
Landfilled according to the classification of

  In the management-type final disposal site 100, the valleys and excavation grounds in the mountainous areas that are used as landfills are partitioned by dams 101, and the bottoms and slopes of the landfills are made of impervious layers or walls such as rubber sheets. A hydraulic work 102 is applied, and a leachate collecting and draining pipe 103 is laid.

  A leachate reservoir 104 is provided outside the dam 101 via a drainage pipe 103 and is fed to the leachate treatment facility 105 by a pump. Although not shown in the figure, a groundwater collection / drainage pipe is provided outside the impermeable work 102 so that rainwater and groundwater are not mixed into the leachate and collected in a regulating pond or the like.

  The final disposal site 100 is closed with eaves and the like so that unspecified people cannot enter easily, and it is covered so that various odorous gases generated from the landfill site do not leak to the outside and rainwater does not enter. Covered with facilities 106. The covering facility 106 is framed with steel columns, and a metal plate-like body is arranged to separate it from the outside air. A fan 107 that sucks gas is provided in the vicinity of the upper part of the coating facility 106, and the gas sucked by the fan 107 is deodorized by an activated carbon adsorbing device or the like, detoxified by a detoxifying device, and then released to the atmosphere.

  In addition, the structure of the covering facility 106 includes a ramen structure, an arch structure, a flat truss structure, a self-balanced hybrid structure combining a high-rigidity bending material and a high tensile strength cable, a space frame structure, a shell structure, and an air support structure. Various known support structures such as suspension structures can be used.

  Various wastes including the organic sludge carried in by the truck are landed on the impermeable work 102 in order from the end of the site. Covering soil 109 is applied every time a certain amount of waste 108 is landfilled, and further new waste 108 is landfilled thereon, and when the upper limit is reached, final covering soil 109 is applied.

  Usually, such a management-type final disposal site 100 is filled with organic sludge, inorganic sludge, incinerated ash, waste plastic, slag, concrete scrap, glass scrap, ceramic scrap, slag, debris, etc. .

  The leachate from the waste 108 reaches the impermeable work 102 in accordance with gravity, and is then led to the leachate collection / drainage pipe 103 by the inclination of the impermeable work 102, and the leachate is discharged via the leachate collection / drainage pipe 103. , And after being purified by the leachate treatment facility 105, it is discharged to a sewage treatment plant or the like.

  The final disposal site 100 is closed when the final cover 109 is applied, and is managed until the properties of the leachate, the temperature of the landfill layer, the ground subsidence condition, etc. reach predetermined abolition standards, and then abolished.

  However, when a large amount of organic waste is landfilled, the air permeability is impaired and the decomposition of the organic matter by microorganisms is hindered, and there is a possibility that it cannot be abolished for a long time. Therefore, the pretreatment facility 1 according to the present invention is utilized. In the following explanation, organic waste includes not only organic sludge with a heat loss reduction of 15% or more, but also inorganic sludge with a heat loss reduction of less than 15% or waste containing a small amount of organic matter. It is used in a concept that also includes

  As shown in FIG. 2A, the pretreatment facility 1 is installed in the site of the final disposal site 100. The pretreatment facility 1 is a direct installation facility that biologically pretreats organic waste landfilled in a final disposal site.

  As shown in FIGS. 3A and 3B, the pretreatment facility 1 includes a mounting facility 2, an air diffusion facility 3, and a watering facility 4. The placement facility 2 is a facility that is installed in the final disposal site 100 and places the organic waste before the landfill process together with the inoculum support. The diffuser facility 3 is a facility for diffusing the organic waste placed on the placement facility 2 and includes a blower fan B and a vent pipe 3A. The watering facility 4 is a facility for watering the organic waste placed on the placing facility 2 and is composed of a rain gun or a watering trolley, and each is connected to a water source via a hose.

  More specifically, the mounting facility 2 includes a plurality of side wall members 5 arranged so as to partition a section of the ground surface, and a ventilation suppressing member 7 and a ventilation member 6 arranged in a region partitioned by the side wall member 5. Configured. As the side wall member 5, a sandbag, a flexible container bag, a snake basket filled with cobblestone, or the like is preferably used.

  A plurality of sheet-like ventilation control members 7 are laid so as to cover the ground surface, and a ventilation pipe 3A as a diffuser 3 is disposed on the top, and a ventilation member 6 made of crushed stone or the like covers the ventilation pipe 3A. Thus, the side wall member 5 is filled to the same level. The airflow suppression member 7 is preferably a resin sheet, but may be a metal plate.

  A large number of pores are formed in the pipe wall of the vent pipe 3A, and the base end side is connected to the air supply pipe 3B connected to the blower fan B. The vent pipe 3A is composed of a metal pipe or a resin pipe such as vinyl chloride, and a desired length is secured by flange joining. Similarly, the air supply pipe 3B is formed of a metal pipe or a resin pipe, and a flexible pipe is used at a joint portion with the side wall member 5 or the like. In addition, when using resin-made pile, it is also possible to employ | adopt TS joining joined with an adhesive instead of flange joining.

  The ventilation member 6 is provided so that the pores of the ventilation pipe 3A are not clogged with organic waste, and the ventilation suppression member 7 is arranged to suppress leakage of air supplied from the ventilation pipe 3A into the ground. ing. The mounting equipment 2 is carried in and assembled using heavy equipment.

  By supplying water to the organic waste 10 and the inoculum support 11 mounted on the mounting equipment 2 by the watering equipment 4 and air by the air diffusion equipment 3, a favorable condition is obtained. Preliminary decomposition treatment of organic substances by microorganisms is promoted in the aerobic environment, and the hard-to-decompose organic substances are efficiently decomposed into easily-decomposable organic substances. The time until the contained organic matter is finally decomposed is greatly reduced.

  In addition, turbid organic substances and salt contained in the waste are removed in advance by watering, so the degree of contamination of leachate from the waste landfilled in the final disposal site is improved and the final disposal site is closed. It will be possible to effectively shorten the period until it is abolished. Since such a pretreatment facility 1 is set up in the final disposal site 100, it is not necessary to secure a site for constructing a pretreatment facility that is difficult to obtain due to repulsion of neighboring residents.

  The leachate from the mounting facility 2 penetrates into the ground through the gap of the ventilation control member 7 and is leached from the final disposal site 100 through the drainage pipe 103 provided in the water shielding work 102 of the final disposal site 100. The water is collected in the reservoir 104 and purified by the leachate treatment facility 105 at the final disposal site. In other words, the leachate from the mounting facility 2 may be configured to be discharged to the final disposal site, may be discharged so as to penetrate into the ground, and may be introduced to guide the leachate to the reservoir 104. A water channel may be formed.

  Since the ventilation member 6 is filled to the same level as the side wall member 5, when removing the organic sludge after the pretreatment from the mounting equipment 2, the backhoe, the dozer device, etc. Since it is only necessary to operate the heavy machinery, the work can be easily performed without damaging the mounting equipment 2.

  As shown in FIG. 4, the placement facility 2 can place the organic waste to be pretreated next in the area different from the organic waste being pretreated during the pretreatment of the organic waste. It is preferable to be divided into a plurality of sections, and it is preferable that a part of the bacteria grown with the organic waste being pretreated can be supplied as an inoculum to the organic waste to be pretreated next.

  While the organic waste and the inoculum support are placed on the section 2A of the sectioned installation equipment 2 (2A, 2B) and biologically treated, the newly introduced organic waste is removed. Placed in the other section 2B, when the pretreatment is completed in one section 2A, the organic waste in which the inoculum has propagated is buried in the landfill, and a part of the organic waste is inoculated into the organic waste in the other section 2B. As a result, by placing the newly introduced organic waste in the section 2A, the wasteful time is eliminated and the organic waste can be continuously pretreated. As the initial inoculum support, humus or the like collected from a forest or the like may be used, and then the immediately preceding pretreatment target can be reused as seed sludge.

  As a water source connected to the above-mentioned rain gun or sprinkler truck via a hose, it is preferable to use treated water treated in the leachate treatment facility 105 which is a water treatment device installed in the final disposal site 100, such as a pump. It is preferable that the water gun is configured to supply water to a rain gun or a watering truck.

  The treated water treated by the water treatment device 105 is purified to such an extent that it can be discharged into a sewage treatment plant, and therefore can be suitably used for cleaning organic waste in a pretreatment facility and maintaining a wet state. The amount of clean water used can be suppressed.

  As described above, since the final disposal site 100 is an outside air blocking type, it is not necessary to provide a separate device for processing the gas generated in the pretreatment facility 1.

  As shown in FIG. 4, either the waste storage facility 20 for storing a plurality of types of wastes for each type or the organic waste before the pretreatment in the vicinity of the pretreatment facility 1 (mounting facility 2). It is preferable that a mixing facility 30 for mixing the waste and a development inspection place 40 for receiving the waste carried in the truck are provided.

  When the waste carried in the truck is a legal waste other than organic sludge, the carried-in waste is dropped into the development inspection site 40, and is sorted into the waste storage equipment 20 classified in advance. Stocked in two categories. The waste storage facility 20 is divided into, for example, an incineration ash storage section, a waste plastic storage section, a slag and concrete scrap storage section, a glass scrap and a ceramic scrap storage section, and the like.

  When the waste carried in the truck is organic sludge, the organic sludge dropped on the development inspection site 40 is mixed with waste plastic, slag and concrete scraps in the mixing facility 30 using heavy equipment. It is mounted on the mounting facility 2. It is preferable that the amount of waste to be mixed is 20% or less in volume ratio so that the volume of waste placed on the placement facility 2 does not become excessive.

  If organic sludge brought to the final disposal site is mixed with other waste such as incineration ash, waste plastic, slag, concrete scrap, glass scrap, ceramic scrap, slag, debris scrap, etc. Even if it is organic sludge with a high water content, pretreatment is promoted when pretreatment is performed in the pretreatment facility 1, so that pretreatment is promoted and even after landfill. The biological treatment will progress uniformly. Since such other waste is originally landfilled in the final disposal site, it does not reduce the landfill capacity of the final disposal site.

  In addition, when it is difficult to install the waste storage facility 20, the mixing facility 30, and the development inspection site 40 in the vicinity of the pretreatment facility 1 and relocate the pretreatment facility 1, a space other than the landfill area The organic waste after being fixedly installed and mixed in the mixing facility 30 may be transported to the pretreatment facility 1 by a heavy machine.

  Furthermore, when the moisture content of organic waste such as organic sludge is higher than about 85%, the moisture content is reduced with a coconut shell-type moisture regulator that does not affect the pH, and air permeability during biological treatment It is preferable to adjust so that is not inhibited.

  In addition, the magnitude | size of the mounting equipment 2 is not specifically limited, What is necessary is just to set suitably according to the scale of the final disposal site. In the present embodiment, two sections of 40 m × 20 m square with a depth of about 1 m are formed.

  The pretreatment period varies depending on the composition and origin of the organic waste, but ranges from several weeks to several tens of weeks.

  The pretreatment facility 1 described above is configured so that it can be easily assembled and disassembled so that the organic sludge after pretreatment can be efficiently landfilled. The installation position of the pretreatment facility 1 in 100 is configured to be movable including the area after the landfill process.

  If pre-treatment facilities can be set up in the area after landfill processing, it is not necessary to secure a dedicated site for setting up the pre-treatment equipment 1 in the final disposal site 100, so a final disposal site in a limited area It becomes possible to landfill waste efficiently. Note that a dedicated site for setting up the pretreatment facility 1 may be secured in the final disposal site 100.

  As shown in FIG. 2 (a), the pretreatment facility 1 is installed in the vicinity of the waste carry-in path 12 at the initial stage of landfill, and the waste carried by the truck from the waste carry-in path is near the pretreatment facility 1. And is configured to be mounted on the mounting facility 2 of the pretreatment facility 1. The organic waste pretreated by the pretreatment facility 1 is transported by a heavy machine so as to be landfilled in order from the rear landfill area R1.

  As shown in FIG. 2 (c), when the backside landfill area R1 is landfilled, a new pretreatment facility 1 is installed in the backside landfill area R1 and is carried by a truck from the waste carry-in path 12 The waste is developed in the vicinity of the new pretreatment facility 1 and placed on the placement facility 2 of the new pretreatment facility 1. The organic waste pretreated by the pretreatment facility 1 is conveyed by a heavy machine so as to be buried in the landfill area R2 on the near side.

  As shown in FIG. 2 (e), when the landfill area R2 on the near side is landfilled, a new pretreatment facility 1 is installed in the landfill area R2 on the near side, and the waste carried in by truck from the waste carry-in path An object is developed in the vicinity of the new pretreatment facility 1 and placed on the placement facility 2 of the new pretreatment facility 1. The organic waste pretreated by the pretreatment facility 1 is transported by a heavy machine so as to be buried in the landfill area R1 on the back side. By repeating such a process, the landfill process is efficiently performed.

  Such a pretreatment facility 1 is preferably installed at a position that does not hinder the flow of landfill work, and the pretreatment facility 1 before the relocation so that the waste carried in at the time of relocation can be continuously processed. It is preferable to set up a new pretreatment facility 1 different from that and remove the pretreatment facility 1 before the relocation after the new pretreatment facility 1 is installed.

  In other words, the organic waste pretreatment method for biologically pretreating the organic waste buried in the management-type final disposal site is executed by the pretreatment facility 1 described above.

  Specifically, a placement facility for placing organic waste before landfill treatment, and a dispersion for preliminarily biological treatment by aeration and sprinkling of the organic waste placed on the placement facility. Organic waste pre-treatment facilities including gas facilities and sprinkling facilities at the final disposal site, pre-treatment steps for pre-biological treatment of organic waste, and organic after pre-treatment A landfill step for landfilling the waste, and the pretreatment step and the landfill step are repeated. The pretreatment step is preferably configured so that leachate from the organic waste is discharged to the final disposal site.

  In addition, the loading equipment is divided into multiple areas, and organic waste to be pretreated next is placed in another compartment while pretreating organic waste in one compartment, and organic waste being pretreated There is further included an inoculum growth and supply step of supplying a part of the bacteria grown on the product as an inoculum to the organic waste to be pretreated next.

  In addition, it further includes a dismantling step for dismantling the pretreatment equipment constructed in the construction step, and the construction step is re-executed at a different location in the final disposal site as the landfilling progresses, and dismantling the existing pretreatment equipment Preferably the steps are performed.

  Furthermore, the leachate measurement step for measuring BOD and COD of leachate collected from the organic waste in the pretreatment step, the temperature measurement step for measuring the temperature of the organic waste, and the measurement of the leachate measurement step It is more preferable that an end determination step for determining the end of the pretreatment step based on the BOD / COD ratio obtained from the result and the temperature of the organic waste measured in the temperature measurement step is executed.

  When the biological treatment proceeds in the pretreatment step, the temperature of the organic waste rises and the BOD mainly composed of easily degradable organic substances gradually decreases, but the COD mainly composed of hardly decomposable organic substances does not decrease so much. However, when the biological treatment proceeds under good aerobic conditions, the hardly decomposable organic matter is gradually decomposed to reduce the COD, and the temperature of the organic waste is also lowered accordingly.

  Therefore, by performing the leachate measurement step, periodically measuring the BOD and COD of the leachate to calculate the BOD / COD ratio, and measuring the temperature of the organic waste in the temperature measurement step, The degree of processing progress can be grasped. In the end determination step, the degree of decomposition of the hardly decomposable organic matter is grasped based on the BOD / COD ratio of the leachate and the temperature of the organic waste, and when the preset value is reached, the pretreatment step is ended. The organic waste can finally be landfilled. Specifically, it can be determined that the pretreatment has been completed when the BOD / COD ratio of the leachate is approximately 1, and the temperature difference between the organic waste and the outside air is within 20 degrees.

Another embodiment of the pretreatment facility of the present invention will be described below.
In the above-described embodiment, the direct-type pretreatment facility that can be transferred at the final disposal site has been described. However, an excavation type pretreatment facility that is not suitable for transfer may be installed at the final disposal site. In this case, it is preferable to install it at a position that does not overlap the landfill area and does not hinder the flow of landfill.

  As shown in FIG. 5, the excavation type pretreatment facility 1 includes a side wall 15 and a floor slab 17 integrally formed in a region excavated so as to partition a section of the surface of the final disposal site, a ventilation member 6, and the like. Is equipped with the mounting equipment 2, the air diffusion equipment 3, and the watering equipment 4.

  The side wall 15 and the floor slab 17 of the mounting facility 2 are made of reinforced concrete in order to ensure sufficient strength, and the floor slab 17 is formed with a drain hole 18 for allowing leachate to escape. Similar to FIG. 3A, the floor slab 17 is provided with a ventilation pipe 3A as a diffuser and filled with a ventilation member 6 that covers the ventilation pipe 3A.

  Organic waste is placed on the upper surface of the mounting facility 2 together with the inoculum support and pretreated. Since the floor slab 17 is made of non-breathable concrete, it is not necessary to provide a separate air flow suppressing member. Further, the upper surfaces of the side wall 15 and the ventilation member 6 are substantially flush with the ground surface so that the organic waste can be easily placed and removed by heavy machinery.

  When equipped with a deployment inspection site that inspects the waste brought in, it is preferable to install the excavated pretreatment facility 1 in the vicinity of the deployment inspection site together with the waste storage facility and the mixing facility, and the inspection has been completed. Waste can be quickly mixed and placed on the pretreatment facility 1.

  Instead of a rain gun or a watering cart as the watering device 4, a fixed sprinkler installed near the pretreatment facility 1 may be used.

  When the final disposal site is not an outside air blocking type but an open-air type, it is not necessary to install special gas processing equipment in the pretreatment facility 1 because the released gas is allowed to be released into the atmosphere. However, if rainwater is mixed into the organic waste during the pretreatment, the pretreatment is hindered. Therefore, it is preferable to provide a cover facility in the pretreatment facility 1.

  The configuration of the vent pipe 3A shown in FIG. 3A is very simple and easy to construct, but the amount of air diffused supplied to the organic waste through the vent pipe 3A needs to be uniform. If the pressure loss experienced by the vent pipe 3A is different, the amount of diffused air varies, and there is a risk of hindering homogeneous pretreatment.

  Therefore, various configurations can be adopted in order to evenly diffuse the organic waste placed on the placement facility. For example, as shown in FIG. 6A, if the vent pipe 3A is arranged point-symmetrically at the center point and the air supply pipe 3B is connected to the center point, the air can be diffused substantially evenly. For example, as shown in FIG. 6B, multiple points may be set so that the supply points of the air supplied from the supply pipe 3B to the ventilation pipe 3A are symmetrical.

  Further, as shown in FIG. 6C, if a constant flow valve is provided upstream of each ventilation pipe 3A connected to the air supply pipe 3B, the amount of air supplied to each ventilation pipe 3A can be controlled to be constant. . Further, as shown in FIG. 6 (d), an electromagnetic valve is provided on the upstream side of each ventilation pipe 3A connected to the air supply pipe 3B, and only one electromagnetic valve is opened in order at regular time intervals, and the other electromagnetic valves are opened. If the control for closing the valve is repeated, the amount of air supplied to the vent pipe 3A with the solenoid valve opened increases, so that sufficient air can be sent to the end of the vent pipe 3A. The vent pipe 3A may be divided into groups and the same control may be performed in units of groups. For example, it is possible to exemplify a mode in which the opening / closing control of the solenoid valve is performed in units of groups by dividing into even-numbered ventilation pipes 3A groups and odd-numbered ventilation pipes 3A groups.

  The planar shape of the mounting equipment 2 is not limited to the rectangle as shown in FIG. 7A, but may be a triangle as shown in FIG. 7C, or as shown in FIG. It may be circular. In any case, if the mounting equipment is divided into two sections, the new organic waste brought in during the period of pretreatment of organic waste in one section will be placed in the other section. And pre-processing can be executed continuously.

  In addition, as shown in FIGS. 7B, 7D, and 7F, the mounting facility 2 may be divided into three sections (2A, 2B, 2C), or divided into more sections. Also good. Organic waste carried into the final disposal site can be pretreated in stages, so that pretreatment work can be performed more efficiently.

  Each of the above-described embodiments is an example of the present invention, and the present invention is not limited by the description, and the specific configuration of each part can be appropriately changed and designed within the range where the effects of the present invention are exhibited. Needless to say.

1: Pretreatment equipment 2: Mounting equipment 3: Aeration equipment 3A: Ventilation pipe 3B: Air supply pipe 4: Sprinkling equipment 5: Side wall member 6: Ventilation member (crushed stone)
7: Ventilation suppression member (sheet)

Claims (4)

A method for landfill treatment of organic waste,
A pretreatment step in which organic waste is diffused and sprinkled with water to be biologically treated;
A landfill step for landfilling organic waste after the pretreatment step;
Including
The end of the pre-processing step,
Leachate measurement step for measuring BOD and COD of leachate collected from organic waste in the pretreatment step;
A temperature measuring step for measuring the temperature of the organic waste;
An end determination step for determining the end of the pretreatment step based on the BOD / COD ratio obtained from the measurement result of the leachate measurement step and the temperature of the organic waste measured in the temperature measurement step;
Landfill treatment method for organic waste determined by The said completion | finish determination step determines with the said pre-processing step having been complete | finished when BOD / COD ratio will be substantially 1 and the temperature difference of the temperature of organic waste and the temperature of external air is less than 20 degree | times. The method for landfill treatment of organic waste according to 1. An organic waste pretreatment facility for executing the organic waste landfill treatment method according to claim 1,
Installation equipment for placing organic waste before landfill treatment, and aeration equipment and watering equipment for aerating and sprinkling organic waste placed on the above-mentioned placement equipment for biological treatment Equipped with organic waste pretreatment equipment. The installation equipment includes a side wall and a floor slab integrally formed in a region excavated so as to partition a section of the surface of the earth, and a ventilation member that covers a ventilation pipe as the air diffusion equipment disposed on the floor slab The organic waste pretreatment facility according to claim 3, wherein the organic waste is placed on an upper layer of the ventilation member.

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