JP7132118B2 - Fermentation processing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fermentation treatment apparatus for anaerobic fermentation treatment of organic waste containing solid matter, which is an object to be treated, by putting it into a fermentation tank without prior solubilization treatment.

In Patent Document 1, in order to realize a resource recycling society, biogas (about 60% methane gas, about 40% Carbon dioxide gas, a small amount of hydrogen sulfide, etc.) is being put into practical use, and a suitable fermentation liquid circulation type methane fermentation apparatus has been proposed.

The fermented liquid circulating methane fermentation apparatus has a raw material tank equipped with a mobile rake and a screw conveyor penetrating the peripheral wall at a predetermined height inside, and an intake for throwing organic solid waste mixed with lightweight foreign matter into the raw material tank. Equipped with an inlet, a supply path for supplying fermentation liquid to the raw material tank, and a circulation path for withdrawing the fermentation liquid in the raw material tank from below and returning it upward, solubilizing the waste in advance while immersing it in the fermentation liquid. It is configured to decompose into biogas while circulating together with the fermented liquid, and to collect and discharge lightweight contaminants floating on the liquid surface of the raw material tank to the screw conveyor by moving the rake.

Further, a methane fermentation tank for storing the fermentation liquid is further provided, a supply device is provided for continuously supplying the fermentation liquid in the fermentation tank to the raw material tank in the supply path, and the fermentation liquid in the raw material tank is continuously withdrawn and solidified in the circulation path. It is configured with a solid-liquid separator that separates the liquid and sends the separated filtrate to the fermentation tank and returns the solid content to the raw material tank.

The fermented liquid circulation type methane fermentation apparatus needs to be equipped with a raw material tank that mainly solubilizes organic solid waste in advance and a methane fermentation tank that mainly performs methane fermentation, so there is a problem that the equipment cost increases.

Therefore, the inventors of the present application have devoted themselves to research and development with the aim of realizing a fermentation treatment apparatus that performs anaerobic fermentation treatment by putting organic waste containing solid matter, which is the object to be treated, into a fermentation tank without prior solubilization treatment. We are promoting.

In addition to organic solid waste such as raw garbage and paper waste mentioned above, biomass such as sewage sludge, night soil, livestock manure, agricultural residue, food waste, etc. It is a fermentation treatment apparatus for treating an object.

In the fermentation liquid circulation type methane fermentation apparatus described in the above-mentioned Patent Document 1, both the raw material tank and the methane fermentation are provided with a stirring device configured by an external circulation path with a circulation pump, and the fermentation liquid containing the material to be processed is provided. is configured to agitate the

As an agitating device for agitating the fermentation liquid containing the material to be processed, the wet fermentation apparatus uses a blower fan to supply air bubbles into the tank in addition to the above-mentioned circulation pump system, and the upward flow of the air bubbles is used to A gas circulation system that generates a circulation flow is adopted.

In other words, the agitation method used to agitate the material to be treated and the fermentation liquid must be appropriately selected according to the solid matter concentration (TS or SS [%]) contained in the fermentation liquid. The above-mentioned circulation pump system and gas circulation system are suitably adopted for organic waste such as uniform, low-concentration sludge with a solid concentration of about 5%, garbage, livestock manure, and food waste. However, for combustible waste that is inhomogeneous and contains many substances unsuitable for fermentation and has a solid concentration of 10% or more, a horizontal fermenter is equipped with a stirring paddle that rotates at low speed for venting gas. The component gas method (plug flow type), in which the material to be processed is discharged from the other side, and the material to be processed is introduced from the lower end of the introduction pipe installed upright inside the vertical fermentation tank, and the material to be processed is introduced from the upper end into the tank. In the Dranco method (plug flow method) in which the material to be treated is supplied to the bottom and discharged from the bottom, active stirring has not been performed.

JP 2012-86157 A

However, in addition to organic solid waste, biomass such as sewage sludge and human excreta are treated by fermentation treatment equipment, which treats organic waste either alone or as a mixture. Therefore, there is a problem that it is difficult to uniformly configure a fermenter equipped with a circulation pump type or gas circulation type agitator, or to configure a plug flow type fermenter without an agitator.

If the fermentation liquid in the fermenter has a high solid concentration and high viscosity, adopting a circulation pump system or gas circulation system to disperse the material to be processed requires a large amount of power, which is not practical. If the plug flow type is used, the plug flow cannot be maintained when the solid concentration of the fermentation liquid inside the tank is low and the viscosity is low. This is because the organic solid waste tends to settle or float in the fermented liquid, making it difficult to deal with it.

An object of the present invention is to provide a fermentation treatment apparatus capable of processing from low to high concentrations of solids in view of the above-mentioned problems, and capable of flexibly responding to the concentration of solids in the fermentation liquid. be.

In order to achieve the above-mentioned object, the first characteristic configuration of the fermentation treatment apparatus according to the present invention is a fermentation treatment apparatus in which organic waste including solid matter, which is an object to be treated, is put into a fermenter and anaerobicly fermented. and an agitating mechanism for agitating the organic waste introduced into the fermentation tank within the tank , and an introduction mechanism for introducing the organic waste into the fermenter, wherein the agitating mechanism a stirring shaft rotatably supported at the top of the tank ; a settling-promoting blade fixed to the stirring shaft at a position across the liquid surface of the fermentation broth in the fermenter; and the stirring shaft below the settling-promoting blade. and a dispersing blade fixed in a plurality of stages in the vertical direction and formed shorter in the rotation radial direction of the stirring shaft than the sedimentation promoting blade, and the organic waste by the feeding mechanism. The input position is within the existence range of the dispersing blades in the height direction, and is closer to the length of the dispersing blades than the length of the sedimentation promoting blades in the rotation radial direction of the stirring shaft, or is closer to the length of the dispersing blades. It is in the points that are set inside .

As the stirring shaft rotates, the organic solid waste floating on the liquid surface of the fermented liquid is stirred into the liquid by the sedimentation-promoting vanes, thereby facilitating the fermentation process in the fermented liquid. Then , the position where the organic waste is introduced by the introduction mechanism is within the existence range of the dispersing blade in the height direction and is closer to the length of the dispersing blade than the length of the sedimentation promoting blade in the rotation radius direction of the stirring shaft, or dispersion Since it is set inside the length of the impeller, when the dispersing impeller fixed to the stirring shaft rotates, the material to be treated floating in the fermentation liquid is pressed by the dispersing impeller and captured by the material to be treated during the fermentation process. The biogas in the compressed state is released from the material to be treated, suppressing the rise in the liquid level caused by the volume expansion due to the biogas, and the fermentation liquid, including the organic waste immediately after being put into the fermentation tank Fermentation is further promoted by dispersing the material to be treated in the .

The second characteristic configuration is that, in addition to the first characteristic configuration described above, the tip of the sedimentation promoting vane is formed to extend to a position near the inner wall surface of the fermenter.

Since the tips of the sedimentation-promoting vanes are formed to extend to a position near the inner wall surface of the fermenter, almost all of the organic solid waste floating on the surface of the fermented liquid is pushed into the liquid by the sedimentation-promoting vanes. The fermenting process in the fermented liquid is accelerated.

In the second characteristic configuration, in addition to the first characteristic configuration described above, the sedimentation promoting blade is set in an inclined posture in which the upper edge of the blade surface is inclined forward in the rotation direction of the stirring shaft from the lower edge. and is formed to extend to a position near the inner wall surface of the fermenter so that the material to be treated that floats on the entire liquid surface of the fermented liquid in the fermenter is sedimented in the fermented liquid on the surface of the impeller as it rotates. It is in the point that it is configured.

The upper edge is set in an inclined posture in which the upper edge is inclined forward in the rotation direction of the agitation shaft, and the fermented liquid is stirred by the blade surface of the sedimentation promoting blade formed to extend to a position near the inner wall surface of the fermenter. Substantially all of the organic solid waste floating over the surface is pushed down to settle below the surface, facilitating the fermentation process in the fermentation broth.

In addition to the above-described first or second characteristic configuration, the third characteristic configuration is that the stirring blade is fixed to the stirring shaft at the bottom position of the fermenter to disperse the material to be processed in the fermentation liquid. and a raking blade fixed to the tip of the lower dispersing blade and raking up the unsuitable substances settled in the fermentation broth to the unsuitable substance discharge mechanism. .

The raking blades efficiently rake up the unsuitable materials to the unsuitable material discharge mechanism so that the unsuitable materials for fermentation that have settled inside the fermenter are not deposited on the bottom. In the process, the material to be processed that is mixed with the unsuitable material for fermentation is agitated by the lower dispersion blades to promote the fermentation process.

The fourth characteristic configuration is that, in addition to any one of the first to third characteristic configurations, the dispersing blade is formed of a rod-shaped body having a circular or elliptical cross section.

When the dispersing blade rotates in the fermented liquid, the fermented liquid coming into contact with the surface of the rod-shaped body moves as it rotates so that it is distributed up and down along the circular curved surface. The fermented liquid positioned near the upper and lower sides of the rotational locus of the blades is effectively stirred.

The fifth characteristic configuration is, in addition to any one of the first to fourth characteristic configurations described above, the stirring shaft being rotatably supported by a lid disposed at the top of the fermenter, and the fermentation The point is that it is constructed so that it can be inserted and removed from the upper end of the tank.

By removing the lid from the fermenter, the stirring mechanism can be pulled out from the upper end of the fermenter without disassembling the stirring mechanism. No mechanism is required.

The sixth characteristic configuration is, in addition to any one of the above-described first to sixth characteristic configurations, the insertion mechanism in an inclined posture at a predetermined inclination angle with respect to the horizontal plane so that the tip side faces downward. (2) is composed of a transfer-input mechanism including a cylindrical casing fixed to the wall of the fermenter, a transfer mechanism housed in the cylindrical casing, and a drive mechanism for driving the transfer mechanism. It is in.

When the material to be treated is organic solid waste such as garbage and paper waste, when it is highly fluid sewage sludge, night soil, livestock manure, agricultural residue, food waste, etc., when it is a mixture of these In any case, since the cylindrical casing with the transport mechanism inside is attached to the side wall of the fermenter in an inclined posture, the transport mechanism is driven by the drive mechanism, so that it is stable along the inclined posture. It can be transported and put into the fermentation tank.

In the seventh characteristic configuration, in addition to the sixth characteristic configuration described above, a hopper mechanism whose lower end communicates with the wall of the cylindrical casing is provided, and the objects to be processed having different origins are thrown into the hopper mechanism. is premixed.

Materials to be processed that have different origins and have been charged into the hopper mechanism are premixed inside the hopper and then sequentially transported into the fermenter by the transport charging mechanism. As a result of the material to be treated being mixed inside the hopper and fed into the tank as a mixture of stable properties, the material is homogeneously and rapidly dispersed in the tank.

The eighth characteristic configuration is such that, in addition to the above-described seventh characteristic configuration, the liquid surface of the fermentation broth in the fermenter is positioned at a position where the hopper mechanism communicates with the wall of the cylindrical casing. , the mounting position of the hopper mechanism to the cylindrical casing is set.

The fermented liquid that has flowed into the cylindrical casing does not leak outside from the hopper mechanism, and the organic waste supplied from the hopper mechanism is given an appropriate amount of moisture, so that fermentation can be carried out after being forced into the fermenter. Disperses rapidly in liquid.

A ninth characteristic configuration of the fermentation processing apparatus according to the present invention is the fermentation processing apparatus having the sixth characteristic configuration described above, wherein the loading position of the introduction mechanism with respect to the side wall of the fermentation tank in the vertical direction is the object to be processed. The point is that it has a mounting position adjusting mechanism that can be adjusted based on the properties of the.

The properties of the material to be treated that is fed into the fermentation treatment apparatus vary depending on the environment of the area where the apparatus is installed, but are stable and do not vary greatly from area to area. Therefore, when manufacturing a fermentation treatment apparatus, the material to be processed can be introduced into the fermentation tank in a state suitable for the properties of the material to be processed by adjusting the mounting position of the loading mechanism in the vertical direction based on the properties of the material to be processed. will be able to For example, the object to be treated, which has a high solid concentration and high viscosity in the fermentation liquid in the fermentation tank, is difficult to float in the fermentation liquid. For example, the object to be treated, which has a low solids concentration and low viscosity in the fermentation liquid in the fermentation tank, easily floats to the liquid surface in the fermentation liquid. Fermentation can proceed without floating.

A tenth characteristic configuration of the fermentation treatment apparatus according to the present invention is, in addition to the above-described ninth characteristic configuration, that the position of the tip of the conveying/input mechanism with respect to the radial direction of the fermentation tank is determined based on the properties of the material to be treated. The point is that it has a tip position adjustment mechanism that can be adjusted by

If the position of the leading end of the conveying loading mechanism is short relative to the radial direction of the fermenter, the object to be processed can be loaded from a deeper position in the fermenter, and the position of the leading end of the push-loading mechanism is closer to the fermenter. If the length is longer in the radial direction of the fermenter, the object to be treated can be introduced from a shallower position in the fermenter. Therefore, by adjusting the position of the tip of the push-in mechanism according to the properties of the material to be processed, it is possible to achieve a good fermentation state.

As described above, according to the present invention, it is possible to provide a fermentation treatment apparatus capable of processing from a low concentration to a high concentration of solids and flexibly responding to the concentration of solids in the fermentation liquor. Became.

An explanatory diagram of an organic waste treatment system incorporating a fermentation treatment apparatus according to the present invention. Explanatory drawing of a fermentation treatment system incorporating a fermentation treatment device according to the present invention Explanatory drawing of the fermentation treatment apparatus according to the present invention (a) is an explanatory diagram of the plan view of the input mechanism, (b) is an explanatory diagram of the side view of the input mechanism, (c) is an explanatory view of the A section of (b), and (d) is an explanation of the B section of (b). Figure, (e) is an explanatory view of the C cross section of (b), (f) is an explanatory view of the positional relationship between the opening formed in the cylindrical casing and the pressing body (a) is an explanatory diagram of the settling promotion blade, (b) is an explanatory diagram of the dispersion blade, and (c) is an explanatory diagram of the raking blade. (a) is an enlarged explanatory view of the main part of the closing mechanism in which the pressing body has retracted to the vicinity of the rearmost end, and (b) is an enlarged explanatory view of the main part of the closing mechanism in which the pressing body has advanced to the foremost end. Explanatory drawing of the fermentation treatment apparatus according to the present invention Explanatory drawing of the fermentation treatment apparatus according to the present invention (a) is an explanatory diagram of the positional relationship between the opening formed in the cylindrical casing and the pressing body, (b) is an explanatory diagram of the same embodiment, and (c) is an explanatory diagram of the same embodiment. Explanatory drawing of the scum discharge mechanism

Hereinafter, a fermentation processing apparatus according to the present invention will be described with reference to the drawings.

[Description of the system incorporating the fermentation treatment device]
FIG. 1 shows a block configuration of an organic waste treatment system. This system treats various organic wastes of different origins, such as municipal solid waste, night soil, septic tank sludge, and sewage sludge, and recovers the energy contained in these organic wastes as biogas.

Combustible waste such as paper waste, kitchen waste, and resin collected from general households is crushed into small pieces using a crusher, etc., and organic solid waste suitable for fermentation processing and resin and inorganic materials unsuitable for fermentation processing are collected. , metals, etc., are processed by a waste incineration facility, and those suitable for fermentation are put into a fermentation treatment apparatus and subjected to methane fermentation.

In this fermentation treatment apparatus, in addition to combustible waste, which is suitable for fermentation, night soil, septic tank sludge, and sewage sludge can be treated at the same time. In addition to organic solid waste such as garbage and paper waste, sewage sludge, night soil, and septic tank sludge, biomass such as livestock manure, agricultural residue, food waste, etc. etc. are also subject, and organic wastes that are either alone or mixed are subject.

The methane gas contained in the biogas produced by the methane fermentation process is recovered as renewable energy, and the fermentation residue is incinerated after undergoing residue treatment such as dehydration. The dewatered liquid produced by the dehydration treatment of the fermentation residue is subjected to biological treatment such as the activated sludge method, and the surplus sludge produced by the biological treatment is also subject to methane fermentation treatment as a material suitable for fermentation.

[Description of fermentation treatment equipment]
FIG. 3 shows the overall configuration of the fermentation treatment apparatus. The fermentation treatment apparatus 10 includes a fermenter 20, an introduction mechanism 30, a stirring mechanism 40, a gas discharge part 50, a fermentation liquid discharge port 60, an unsuitable matter discharge mechanism 70, and the like, and is an object to be treated. This is an apparatus for anaerobic fermentation by directly charging fermentable materials, that is, organic wastes containing solids, into the fermenter 20 without solubilizing them in a separate solubilizing treatment tank or the like.

The fermentation tank 20 is a vertical processing tank formed in a cylindrical shape using a steel plate. passes through the jacket 22 and is discharged from the heat medium discharge portion 21 . Hot water is preferably used as the heat medium. For example, hot water of about 57° C. is supplied to the jacket 22 to heat the fermented liquid in the tank to a temperature of about 55° C. suitable for fermentation.

A disk-shaped lid 25 is detachably fixed to the upper end of the fermentation tank 20 with a flange portion so as to seal the inside of the tank. The cover 25 supports the agitation mechanism 40, and is connected to a pipe having a biogas discharge valve V3 that functions as a gas discharge unit 50 for taking out the biogas produced in the anaerobic fermentation process. A viewing window 26 is provided for visually confirming.

A funnel-shaped portion 24 whose diameter is gradually reduced on the lower side is formed at the lower end of the side wall of the fermentation tank 20, and an unsuitable material discharge mechanism 70 is provided at the center of the bottom.

The unsuitable material discharge mechanism 70 is a mechanism for discharging unsuitable materials for fermentation such as sand, shells, and metals mixed in the fermentation liquid from the fermenter 20 . It is composed of a tubular portion 73 with a reduced diameter and double damper mechanisms 71 and 72 provided in the tubular portion 73 . After the upper damper 71 is opened with the lower damper 72 closed to take in the unfermented substances, the upper damper 71 is closed and the lower damper 72 is opened to remove the unfermented substances from the tank.

If unsuitable substances for fermentation such as sand, metals, shells, etc. mixed in the material to be treated gradually sediment in the fermentation solution and accumulate at the bottom, the effective fermentation volume may decrease and the fermentation efficiency may decrease. However, by accumulating unsuitable substances for fermentation on the cylindrical portion 73 formed at the bottom and discharging them out of the tank via the double damper mechanisms 71 and 72, a large power such as a pump device is not required. Decrease in fermentation volume can be avoided while maintaining anaerobic conditions.

[Description of the stirring mechanism incorporated in the fermentation treatment apparatus]
The agitating mechanism 40 is provided for agitating the organic waste put into the fermentation tank 20 in the tank. It is composed of a vertical rotating shaft supported by bearings, a stirring shaft 41 connected to the rotating shaft via a coupling 43, and stirring blades 42, 44, and 46 fixed to the stirring shaft 41. . The stirring shaft 41 is installed so as to coincide with the axis of the fermenter 20 .

The upper end of the stirring shaft 41 is connected via a coupling 43 to a rotating shaft supported by the lid 25, and the lower end of the stirring shaft 41 is a free end without being supported. Therefore, when maintenance is required, the lid 25 can be removed from the fermenter 20 without disassembling it or removing the sludge from the fermenter 20. , the stirring shaft 41 can be pulled out.

As shown in FIGS. 3 and 5(a), the uppermost sedimentation promoting blade 42 is two pieces fixed to a sleeve 42b fitted and fixed to the stirring shaft 41 so as to have a central angle of 180°. , and is positioned so that the liquid surface is positioned across the liquid surface of the fermentation liquid in the fermenter 20, preferably in the vertical center of the blade surface, and the tip is fermented. It is formed to extend to a position near the inner wall surface of the tank 20 . Specifically, the gap between the tip of the blade piece 42a and the inner wall surface of the fermentation tank 20 is set to approximately the diameter of the inlet. In addition, the liquid level of the fermentation liquid is detected by a liquid level sensor such as a light reflection type so that the liquid level is positioned at the center of the vertical direction of the blade surface, and the fermentation liquid is adjusted so that the fluctuation of the liquid level of the fermentation liquid is small. is preferably adjusted by pulling out the

Each blade surface is fixed to the sleeve 42b so that the upper edge 42U of each blade surface is tilted toward the rotation direction of the stirring shaft 41 from the lower edge 42L. Therefore, when the stirring shaft 41 rotates, the unfermented organic solid waste floating on the liquid surface of the fermentation liquid is pushed down by the sedimentation promoting blades 42 so as to efficiently settle below the liquid surface. Fermentation process will be promoted. In FIG. 5(a), the upper drawing is a plan view, and the lower drawing is a front view.

In this embodiment, the radial length of each blade piece 42a is set to be slightly shorter than the inner diameter of the fermentation tank 20, and the upper end side is in the range of 15 to 60 degrees, preferably 30 to 45 degrees with respect to the horizontal plane. It is set to tilt in the direction of rotation within a range of degrees. If the peripheral speed of the tip of the stirring shaft 41 is in the range of 10 to 100 mm/sec, preferably 30 to 60 mm/sec, sedimentation of the waste is promoted.

As shown in FIGS. 3 and 5(b), three dispersing blades 44 are provided below the sedimentation accelerating blades 42 in the vertical direction. In FIG. 5(b), the upper drawing is a plan view, and the lower drawing is a front view.

The dispersing blade 44 is composed of two flat plate-like blade pieces 44a fixed to a sleeve 44b fixed to the stirring shaft 41 so as to have a central angle of 180°. is shorter than the sedimentation promoting vanes 42, and is set to a length in the range of 40 to 90%, preferably 50 to 70% of the inner diameter of the fermenter 20. With the flat plate-like blade piece 44a, it is possible to efficiently agitate the middle part of the fermentation liquid in the vertical direction, and to separate light and heavy fermentation liquids.

The dispersion blade 44 may have a vertical width of about several tens to several hundred mm, and may be set so that the upper end side is inclined in the rotational direction by a predetermined angle with respect to the horizontal plane.

Due to the stirring action of the dispersing blades 44, the biogas trapped in the material to be processed in the fermentation process is released from the material to be processed, suppressing the increase in the liquid level due to the volume expansion due to the biogas, and the fermentation liquid. Fermentation is further promoted by dispersing the material to be treated in the tank. Further, by agitating the fermented liquid, the temperature distribution of the fermented liquid to which heat is transferred from the heat medium supplied to the jacket 22 becomes uniform, and the entire fermented liquid is maintained at a favorable fermentation temperature.

In addition, one stage of the dispersing blades 44 arranged in three stages in the vertical direction is configured to be positioned at a height in the vicinity of the position where the organic waste is introduced by the introduction mechanism 30. The organic waste immediately after being put into 20 is quickly dispersed in the fermentation liquid.

As shown in FIGS. 3 and 5(c), raking blades 46 are provided below the dispersing blades 44 . In FIG. 5(c), the upper drawing is a plan view, and the lower drawing is a front view.

The scraping blades 46 are fixed to the stirring shaft 41 at the bottom position of the fermentation tank 20, and are fixed to the lower dispersing blade pieces 46a for dispersing the material to be processed in the fermentation liquid, and the tips of the lower dispersion blade pieces 46a to disperse the materials in the fermentation liquid. and raking blades 46c for raking up unsuitable materials for fermentation that have sedimented to the unsuitable material discharging mechanism 70. - 特許庁

Specifically, the raking blade 46 includes two lower dispersing blade pieces 46a having a U-shaped cross section fixed to a sleeve 46b fitted and fixed to the stirring shaft 41 so as to have a central angle of 180°, It is composed of raking blades 46c having a U-shaped cross section provided on the tip side of the lower dispersion blades 46a. The raking blade 46c is arranged in an inclined position so as to face the funnel-shaped portion 24 of the side wall of the fermentation tank 20, and the lower dispersion blade 46a has one end fixed to the sleeve 46b and the other end fixed to the blade 46c. placed in a horizontal position.

The blades 46a and 46c, each having a U-shaped cross section, are arranged so that the openings of the blades 46a and 46c face the direction of rotation. It operates so as to rake it toward the shaped portion 73 . In the process, the fermentable substances mixed with the unfermentable substances are agitated to promote the fermentation process.

That is, in order to prevent the unsuitable materials for fermentation that have settled inside the fermentation tank 20 from accumulating on the bottom and to avoid the occurrence of cross-linking due to the unsuitable materials for fermentation, the scraping blade 46c efficiently scrapes the unsuitable materials to the unsuitable material discharging mechanism 70. sent. In the process, the material to be processed that is mixed with the unsuitable material for fermentation is agitated by the lower dispersion blade 46a to promote the fermentation process. It should be noted that the blade pieces 46a and 46c are not necessarily formed to have a U-shaped cross section, and may simply be formed of a flat plate-like body. The reason why the stirring shaft extends to the vicinity of the tubular portion is to destroy the cross-linking, and the effect is further enhanced by providing a projection at that portion.

[Description of the input mechanism incorporated in the fermentation treatment apparatus]
As shown in FIGS. 3 and 4 (a) to (e), the charging mechanism 30 is a mechanism for charging organic waste into the fermentation tank 20, and has a predetermined inclination angle θ with respect to the horizontal plane. A cylindrical casing 31 (see FIG. 4(e)) having a rectangular cross section inserted into a flange pipe 36 formed on the wall of the fermenter 20 in an inclined posture so that the tip side faces downward and is fixed to the flange; Composed of a push-in mechanism 30 having a pressing body 32 with a rectangular cross section and a hydraulic driving mechanism 33 for driving the pressing body 32 forward and backward along the axis of the cylindrical casing 31 . It is

The cylindrical casing 31 is inserted and fixed into a flange pipe 36 provided on the side wall of the fermenter 20 so that the tip FE of the cylindrical casing 31 is immersed in the fermented liquid inside the fermenter 20 . In this embodiment, the flange pipe 36 is set at an inclination of about 30° with respect to the horizontal plane, and the cylindrical casing 31 is also set at an inclination of about 30° with respect to the horizontal surface. In this embodiment, the inclined posture is set at about 30°, but it can be set appropriately within the range of 15° to 45°. Therefore, the driving mechanism 33 arranged on the other end side of the tubular casing 31 is not submerged in the fermented liquid and can be reliably water-sealed.

Further, a hopper mechanism 35 is provided above the push-in mechanism 30 to supply the organic waste from the tip of the cylindrical casing 31 to the push-in mechanism 30 . The hopper mechanism 35 includes four side walls 35a hanging down from an upper opening 35d, which is a loading part having a freely openable/closable lid 35c. An inclined wall portion 35b is formed which continues to a pair of opposed walls provided so as to sandwich the axis of 31 and which gradually narrows toward the lower end.

In FIG. 4A, the lid body 35c is indicated by a dashed line for convenience of explanation. One end of the lid 35 is attached to a side wall 35a via a hinge mechanism h so as to be freely opened and closed. Moreover, the code|symbol 35h shown in FIG.4(c) is an inspection window.

Fermentable material put into the container from the upper opening 35d falls into the tubular casing 31 through the opening 31a formed in the tubular casing 31 of the push-in mechanism 30 from the lower end opening of the inclined wall portion 35b. configured to be supplied.

That is, an opening 31a having a shape whose longitudinal direction is along the axis of the cylindrical casing 31 is formed in the upper part of the cylindrical casing 31 that constitutes a part of the input mechanism 30, and each longitudinal edge of the opening 31a Each lower end 35u (see FIG. 4A) of the inclined wall portion 35b is arranged so as to be continuous without a step.

The pressing surface 32a of the pressing body 32 is formed in a rectangular shape extending upward from a virtual plane P passing through the connecting portions P1 and P2 of the longitudinal edges of the opening 31a and the lower ends of the inclined wall portions 35b. Further, the inclination angle of the inclined wall portion 35b connected to the cylindrical casing 31 is set to an inclination angle of 10 to 60 degrees, preferably 30 to 50 degrees with respect to the horizontal direction (see FIG. 9A). .).

By adopting such a configuration, even when the organic waste thrown into the hopper mechanism 35 is compacted near the lower end of the inclined wall portion 35b and there is a risk of forming a bridge, the pressing surface 32a can As a result of scraping off the consolidation portion, the weight balance of the organic waste in the vicinity of the lower end of the inclined wall portion 35b is disturbed and the generation of bridges is prevented. Further, even if a bridge is formed near the lower end of the inclined wall portion 35b of the hopper mechanism 35, the bridge is destroyed because the compressed portion is scraped off by the pressing surface 32a.

Moreover, if the object to be treated is organic solid waste such as food waste or paper waste, or highly fluid sewage sludge, night soil, livestock manure, agricultural residue, food waste, etc., a mixture of these In any case, the cylindrical casing 31 in which the pressing body 32 is installed is attached to the side wall of the fermentation tank 20 in an inclined posture, so that the pressing body 32 driven forward and backward by the driving mechanism 33 stabilizes the casing. The fermenter 20 can now be pushed in.

The tip FE of the cylindrical casing 31 is formed to extend further to the tip side than the maximum advanced position of the pressing body 32 . Therefore, when the pressing body 32 is driven backward, the organic waste pressed and densified by the pressing body 32 remains at the front end FE of the cylindrical casing 31, thereby exhibiting a sealing function. As a result, a large amount of the fermentation liquid in the fermenter 20 does not flow into the cylindrical casing 31, and the leakage of the fermentation gas into the cylindrical casing 31 can be avoided.

Furthermore, the opening of the tip FE of the tubular casing 31 is formed at a vertical or acute-angled edge when viewed from the side. Therefore, when the fermentation gas generated inside the fermentation tank 20 rises in the fermentation liquid in the vertical direction, it is possible to avoid the occurrence of an inconvenience such as flowing into the cylindrical casing 31 and leaking to the outside. can be done.

The attachment position of the hopper mechanism 35 to the tubular casing 31 is set so that the vicinity of the position CA where the hopper mechanism 35 communicates with the wall of the tubular casing 31 is the liquid surface of the fermented liquid in the fermentation tank 20 (Fig. 4(b)). With such a setting, the fermented liquid that has flowed into the cylindrical casing 31 will not leak outside from the hopper mechanism 35, and the organic waste supplied from the hopper mechanism 35 will be given an appropriate amount of moisture. Therefore, after being pushed into the fermenter 20, it is quickly dispersed in the fermentation liquid.

The hopper mechanism 35 is composed of a square tube-shaped housing portion 35 a having a side wall that hangs down from a rectangular upper opening, and an inclined wall portion 35 b in which the lower end of the housing portion 35 a tapers toward the cylindrical casing 31 . In addition to the fermentable material obtained by sorting combustible waste, which is organic solid waste, thrown into the storage part 35a, night soil, septic tank sludge, and sewage sludge are mixed together. It is put into the fermenter 20 by the push-in mechanism 30 while being mixed in a state of being piled up inside.

Of the walls 35a of the hopper mechanism 35 connected to the cylindrical casing 31, the front wall portion 35e on the advancing direction side of the pressing body 32 is inclined in the advancing direction of the pressing body 32 at the connecting portion with the cylindrical casing 31. (see FIGS. 4(b) and 4(d)).

The organic waste that is pressed inside the cylindrical casing 31 by the pressing body 32 is compacted by the front wall part 35e and the pressing body 32 when it is compacted with the front wall part 35e that is connected to the cylindrical casing 31. stress acts. At this time, if the front wall portion 35e on the advance direction side of the pressing body 32 is formed in an inclined posture toward the advancing direction of the pressing body 32 at the connecting portion with the cylindrical casing 31, the vicinity of the upper portion of the pressing body 32 may be inclined. Since part of the organic waste escapes into the space formed in the inclined front wall portion 35e, a rapid compaction action can be avoided, and the waste can be smoothly pressed and supplied.

A rear wall portion 35f of the wall portion 35a of the hopper mechanism 35 connected to the tubular casing 31 on the backward direction side of the pressing body 32 is positioned on the backward direction side of the pressing body 32 from the opening portion 31a.

When the pressing body 32 is driven to the maximum advanced position, the pressing body is extended from the longitudinal length of the opening 31a so that the organic waste does not fall behind the rear end wall of the pressing body 32 from the opening 31a. The length of 32 needs to be increased, which causes the inconvenience of increased component cost. Therefore, if the length of the opening 31a in the longitudinal direction is restricted, the capacity of the hopper mechanism 35 must be restricted accordingly. Even in such a case, of the wall portion 35a of the hopper mechanism 35 connected to the tubular casing 31, the rear wall portion 35f on the backward side of the pressing body 32 should be positioned on the backward direction side of the opening 31a. For example, it is possible to secure the capacity of the hopper mechanism 35 while limiting the length of the pressing body 32 and reducing the parts cost.

FIGS. 6A and 6B show a state in which the pressing body 32 is driven backward along the cylindrical casing 31 to near the rearmost end and a state in which it is driven forward to the frontmost end. The rear end position of the pressing body 32 that has been driven to move backward is on the side of the rear end wall 35f of the hopper mechanism 35 in the opening 31a of the cylindrical casing 31, and the tip of the pressing body 32 can be slightly seen from the opening 31a. It is set to be positioned within a tubular casing.

Since the pressing surface 32a of the pressing body 32 is formed in a plane perpendicular to the advance direction, the maximum pressing force acts on the organic waste. When the pressing body 32 reaches the maximum advanced position within the tubular casing 31 and then is driven backward, new organic waste is dropped and supplied from the hopper 35 into the cavity formed inside the tubular casing 31 . be.

As shown in FIGS. 6(a) and 6(b), in this embodiment, the pressing surface 32a of the pressing body 32 is formed on a plane perpendicular to the advance direction, and extends from the top to the bottom in a side view. It is formed in a staircase shape protruding step by step, and the organic waste pressed by the pressing surface on the lower side of the cylindrical casing 31 is pushed by the cylindrical casing 31 while applying the maximum pressing force to the organic waste. The cylindrical casing 31 is configured to be pressed to the tip side F of the cylindrical casing 31 rather than the organic waste pressed by the pressing surface on the upper side of the cylindrical casing 31 .

Therefore, when the pressing body 32 is driven backward, the volume of the cavity formed in the cylindrical casing 31 becomes larger than when it is pressed by a flat pressing surface, and a large amount of organic waste is collected in the cylindrical casing. Drop supply becomes possible within 31.

The inclination angle of the stepped shape formed on the pressing surface 32a (the inclination angle α of the tip end enveloping surface of the step with respect to the axis of the cylindrical casing 31) is is preferably set to an angle equal to or greater than the inclination angle θ of . Since the organic waste that has been pressed earlier does not exist on the drop trajectory of the organic waste falling vertically into the cylindrical casing 31 from the hopper mechanism 35, a correspondingly large amount of organic waste falls. will be supplied.

Furthermore, one end side is fixed to a connecting portion between the cylindrical casing 31 and the wall portion 35e on the advance direction side of the hopper mechanism 35 or in the vicinity thereof, and the other end side is spanned over the input portion 35d of the hopper mechanism 35 along the opening. 35 g of cord-like body.

Even if a bridge occurs at the inclined wall portion 35b of the hopper mechanism 35, the bridge can be easily collapsed by towing the cord-like body 35g suspended over the input portion 35d. Note that the cord-like body 35g can be configured with a wire or a chain. In addition, since a space is formed by the inclined portion of the front wall portion 35e at the connecting portion to which one end side of the cord-like body 35g is fixed, even when the pressing body 32 is driven to the maximum advanced position, the pressing body 32 does not move. do not interfere with The pressing body 32 and the cord-like body 35g may be interlocked to automatically pull the cord-like body 35g.

The pressing body 32 is composed of a plurality of pressing body pieces 32c that can be divided in the axial direction of the cylindrical casing 31, including the block forming the stepped pressing surface 23a on the tip side. When the pressing body 32 is driven to advance and retreat along the cylindrical casing 31, there is a risk that organic wastes and foreign matter may be caught between the inner wall of the cylindrical casing 31 and the pressing body 32, thereby causing the pressing body to move. 32 may wear out. In such a case, if the pressing body 32 is composed of a plurality of pressing body pieces 32c that can be divided in the axial direction of the cylindrical casing 32, only the worn pressing body pieces 32c need be replaced, thus reducing the cost. can be achieved. If the pressing body 32 is made of a resin material, the tubular casing 31 can be prevented from being worn, the sliding can be improved, and the acid corrosion caused by the fermentation liquid can be avoided. Further, when the opening is enlarged in order to increase the feeding amount of the raw material, it is necessary to lengthen the pressing body 32 as well. Even in such a case, the length of the pressing body 32 can be easily adjusted. In order to increase the strength of the pressing body 32, the pressing body 32 can be integrally made of SUS.

Further, a stroke gauge 32g is provided whose front end is fixed to the rear end portion 32e of the pressing body 32 and whose rear end protrudes from the rear end portion of the cylindrical casing 31. As shown in FIG. Since the drive mechanism 33 is of hydraulic type, when the cylindrical casing 31 is clogged with organic waste, the piston rod drives the pressing body 32 even if the maximum pressure oil is supplied to the oil passage. may not work.

In such a case, it is difficult to check from the outside of the tubular casing 31 whether or not the pressing body 32 has reached the maximum advanced position. can be easily confirmed from the outside of the cylindrical casing 31 .

If the push-in mechanism 30 is in a vertical position, the liquid with high fluidity is preferentially thrown into the tank over the solid content. In any case, the composition of the material to be processed in the tank becomes unstable, but if the push-in mechanism 30 is installed in an inclined posture, such a situation can be avoided.

A flange pipe serving as a fermentation liquid discharge port 60 is provided at the lower side wall of the fermenter 20, and the fermentation liquid after the anaerobic fermentation process, that is, the digestive liquid is discharged.

[Description of Another Embodiment of Fermentation Treatment Apparatus]
As shown in FIG. 7, the tip FE of the cylindrical casing 31 is preferably installed so as to extend between a pair of upper and lower dispersing blades 44, and the organic waste introduced into the fermentation tank 20 is dispersed. The vanes 44 provide rapid and efficient agitation within the vessel.

In the example of FIG. 9(a), the inclined wall portion 35b of the hopper mechanism 35 and the inclined wall of the tubular casing 31 having a rectangular cross section are connected in a plane. Moreover, when the cross-sectional shape of the cylindrical casing 31 is circular, the inclined wall portion 35b of the hopper mechanism 35 may be configured to extend in the tangential direction of the cylindrical casing 31 . In this case also, the pressing surface 32a of the pressing body 32 extends above the imaginary plane P passing through the connecting portions P1 and P2 of the longitudinal edges of the opening 31a and the lower ends of the inclined wall portions 35b. It just needs to be configured. Also in this case, the inclination angle of the inclined wall portion 35b connected to the cylindrical casing 31 is set to an inclination angle of 10 to 60 degrees, preferably 30 to 50 degrees with respect to the horizontal direction.

Further, as shown in FIG. 9(c), even when the inclined wall portion 35b of the hopper mechanism 35 is not configured to extend in the tangential direction of the tubular casing 31, the pressing surface 32a of the pressing body 32 is positioned at the opening. 31a and the connecting portions P1 and P2 of the lower ends of the inclined wall portions 35b.

FIG. 10 shows a mechanism for removing the scum that has grown on the surface of the fermentation liquid inside the fermenter 20 . A discharge port h is formed on a wall surface having a height approximately equal to the liquid surface of the fermented liquid adjusted to the vertical center position of the sedimentation promotion blade 42, and a scum suction pipe is provided at the discharge port h via an opening/closing valve V1, A scum discharge pipe is branched and connected vertically downward from the scum suction pipe via an on-off valve V2.

If a thick scum accumulates on the liquid surface of the fermentation liquid despite the agitation process by the sedimentation promotion blades 42, the vacuum pump is operated with the valves V1 and V2 closed, and the biogas is discharged after adjusting the inside of the pipe to a vacuum. It is preferable to provide a suction mechanism that opens the valves V3 and V1 to take scum into the scum suction pipe, then closes the valve V1 and opens the valve V2 to discharge the scum from the scum discharge pipe. The discharged scum is subjected to residue treatment (dehydration treatment).

In the above-described embodiment, the stirring mechanism 40 has a configuration in which the stirring shaft 41 is provided with the settling-promoting blades 42, the dispersing blades 44, and the scraping blades 46. The blades 44 and the raking blades 46 may not be provided.

In the above-described embodiment, an example in which the stirring mechanism 40 is provided with three stages of dispersing blades 44 (upper, middle, and lower) has been described, but it may be one stage, two stages, upper and lower stages, or four stages. You may have more.

The dispersing blade 44 may be composed of two rod-shaped bodies 44a having a circular cross section fixed to a sleeve 44b fixed to the stirring shaft 41 so as to have a central angle of 180°. The length in the radial direction of each rod-shaped body 44a is shorter than that of the sedimentation promoting blades 42, and may be set within the range of 40 to 90%, preferably 50 to 70%, of the inner diameter of the fermentation tank 20. The cross-section of the rod-like body 44a may be an ellipse whose major axis is vertically oriented, a perfect circle, or an ellipse.

When the dispersing blade 44 rotates in the fermented liquid, the fermented liquid that comes into contact with the surface of the rod-shaped body 44a moves along the circular curved surface so as to be distributed up and down along with the rotation, so that it can rotate without receiving a large resistance. , the fermented liquid positioned near the top and bottom of the rotation trajectory of the dispersing blade 44a is effectively agitated.

In the above-described embodiment, an example in which each of the sedimentation promoting blade 42, the dispersing blade 44, and the raking blade 46 is composed of two blade pieces fixed to the sleeve so as to have a central angle of 180° has been described. The number of blade pieces is not limited to two, and may be three or more blade pieces. Three blades may be arranged at a central angle of 120°, and four blades may be arranged at a central angle of 90°. Moreover, each stirring blade does not need to be linear in plan view, and may be formed in a curved shape in plan view.

In the above-described embodiment, the sedimentation promoting blade 42 and the dispersing blade 44 are formed of plate-shaped blade pieces, and the raking blade 46 is formed of blade pieces having a U-shaped cross section. The shape of the piece is not particularly limited, and it is possible to adopt a blade piece having an appropriate shape from blade pieces having known shapes according to the required function. However, the blade piece of the sedimentation promoting blade 42 must have a function of immersing the untreated material floating on the liquid surface of the fermentation liquid as it rotates.

In the above-described embodiment, the funnel-shaped portion 24 is formed in the lower part of the side wall of the fermenter 20, and an example is described in which unfermented substances settle along the inclined surface of the inner wall, but the funnel-shaped portion 24 is essential. Instead, it may be formed on a vertical wall. In this case, the raking blades 46 may be configured to rake out the unsuitable substances that have settled to the bottom toward the cylindrical portion 73 .

In the embodiment described above, the fermenter 20 having a circular cross-section was described, but the shape of the fermenter 20 is not limited to a cylindrical shape, and the fermenter 20 may have a rectangular tube shape with a rectangular cross-section. In such a case, a plurality of stirring mechanisms 40 may be installed in a distributed manner in order to immerse the object to be treated floating on the surface of the fermentation liquid in the fermentation liquid.

[Description of fermentation treatment system]
FIG. 2 shows a fermentation treatment system in which the fermentation treatment device 10 is incorporated. The household waste collected by the garbage truck 90 and brought into the household waste yard 91 is conveyed to the conveyor mechanism by the wheel loader 92 and thrown into the bag breaker 93 .

The household waste whose bags have been broken by the bag breaker 93 is fed to a sorter 94, where it is divided into lightweight materials such as resin 94a, heavy materials such as metal components 94b, and materials suitable for fermentation such as kitchen waste and paper waste. The fermentable material 94c is accumulated in the fermentable material yard 95. Furthermore, the fermented fermented matter introduced into the fermented fermented matter hopper 96 from the fermented fermented matter yard 95 is crushed into small pieces by the crushing and sorting machine 97 , and the fermented fermented matter separated by wind and sieving is stocked in the stock case 80 . A roll screen sorting machine or the like is used as the sorting machine 94 .

The organic waste filled in the stock case 80 is put into the hopper mechanism 35 provided in the fermentation treatment apparatus 10 by the electric chain mechanism 81, and put into the fermenter 20 via the push-in mechanism 30 for methane fermentation. .

Biogas such as methane gas produced in the fermentation tank 20 is withdrawn from the gas discharge section 50, collected in the gas holder 84, desulfurized in the desulfurization tower 86, and then used as fuel for the gas combustion device 88. Reference numeral 87 denotes fuel (LPG cylinder). The hot water heated by the gas combustion device 88 is supplied as a heat source to the insulation jacket of the fermentation tank 20 or the like.

After the anaerobic fermentation treatment in the fermentation tank 20 has been completed, the fermentation liquid is subjected to solid-liquid separation (dehydration treatment), and the liquid portion is stored in the fermentation sludge storage tank 89 filled with activated sludge. Fermented liquid is introduced from the fermented sludge storage tank 89 to the mixing tank 98, added with a flocculating agent, and then introduced to the sludge dehydrator 99 for solid-liquid separation. and incinerated. The liquid is biologically treated in the biological treatment tank 89, the treated water is discharged, and the surplus sludge is put into the fermentation tank 20 or treated outside the system.

The fermentation processing apparatus 10 described above is attached to the side wall of the fermentation tank 20 in an inclined position so that the tip FE of the tubular casing 31 of the push-in mechanism 30 is immersed in the fermentation liquid. is positioned near the stirring blades.

Furthermore, the fermentation treatment apparatus 10 is configured such that the vertical mounting position of the push-in mechanism 30 with respect to the side wall of the fermentation tank 20 is adjusted based on the properties of the material to be treated.

For example, as shown in FIG. 3, it is desirable to configure the push-in mechanism 30 to be attached to one of flange pipes 36 and 37 provided on the upper and lower side walls of the fermenter 20 . The flange pipes 36 and 37 serve as a mounting position adjusting mechanism capable of adjusting the vertical mounting position of the charging mechanism 30 with respect to the side wall of the fermentation tank 20 based on the properties of the material to be processed.

The properties of the material to be processed that is put into the fermentation treatment apparatus 10 differ depending on the environment of the area where it is installed, but are stable and do not vary greatly from area to area. Therefore, by adjusting the vertical installation position of the push-in mechanism 30 based on the properties of the material to be processed, the material to be processed can be introduced into the fermenter in a state suitable for the properties of the material to be processed. .

For example, the object to be treated, which has a high solids concentration and a high viscosity in the fermentation liquid in the fermentation tank 20, is difficult to float in the fermentation liquid. Therefore, as shown in FIG. By this, the fermentation process can proceed while slowly settling.

In addition, for example, the object to be treated, which has a low solids concentration and a low viscosity in the fermentation liquid in the fermentation tank 20, tends to float to the liquid surface in the fermentation liquid. Therefore, as shown in FIG. By charging from 37, the fermentation process can be proceeded without easily floating on the liquid surface.

Furthermore, it is preferable to provide an attachment pipe so that the position of the tip FE of the cylindrical casing 31 of the push-in mechanism 30 with respect to the radial direction of the fermenter 20 can be adjusted based on the properties of the material to be processed. For example, as shown in FIG. 7, when the position of the front end FE of the cylindrical casing 31 is short relative to the radial direction of the fermenter 20, the material to be treated can be introduced from a deeper position in the fermenter 20. As shown in FIG. 3, when the position of the front end FE of the cylindrical casing 31 is long relative to the radial direction of the fermenter 20, the object to be treated can be introduced from a shallower position in the fermenter. . Therefore, by adjusting the position of the tip portion of the cylindrical casing 31 according to the properties of the material to be processed, it is possible to realize a good fermentation state.

The attachment piping for adjusting the position of the tip of the push-in mechanism 30 with respect to the radial direction of the fermenter 20 serves as a tip position adjustment mechanism that can be adjusted based on the properties of the material to be processed.

In the above-described embodiment, the input mechanism 30 includes the cylindrical casing 31 , the pressing body 32 having a rectangular cross section and being housed in the cylindrical casing 31 , and driving the pressing body 32 forward and backward along the axis of the cylindrical casing 31 . Although an example configured by the push-in mechanism 30 including the hydraulic drive mechanism 33 has been described, the injection mechanism 30 includes a cylindrical casing 31, screw blades incorporated in the cylindrical casing 31, It may be a screw-type throwing mechanism configured with a drive mechanism that can rotate the .

That is, the input mechanism 30 includes a cylindrical casing fixed to the wall of the fermentation tank 20 in a tilted posture with a predetermined tilt angle with respect to the horizontal plane so that the tip side faces downward, and a conveying mechanism installed inside the cylindrical casing. It is only required that the transfer loading mechanism includes a mechanism and a driving mechanism for driving the transfer mechanism.

The above-described embodiment is one aspect of the present invention, and the present invention is not limited by the description, and the specific structure, size, material, etc. of each part are appropriately within the range in which the effects of the present invention are exhibited. Needless to say, it is possible to change the design.

10: Fermentation treatment device 20: Fermentation tank 30: Feeding mechanism 31: Cylindrical casing 32: Pressing body 36: Flange pipe 37: Flange pipe 40: Stirring mechanism 41: Stirring shaft 42: Sedimentation promoting blade 44: Dispersing blade 36: Scraping Gathering blade 50: Gas discharge part 60: Fermented liquid discharge port 70: Inappropriate matter discharge mechanism 71: Double damper mechanism 72: Double damper mechanism 73: Cylindrical part

Claims (10)

A fermentation treatment apparatus for anaerobic fermentation treatment by putting organic waste containing solid matter, which is an object to be treated, into a fermentation tank,
An agitating mechanism for agitating the organic waste introduced into the fermenter in the tank, and an introduction mechanism for introducing the organic waste into the fermenter ,
The stirring mechanism includes a stirring shaft rotatably supported in the upper part of the fermenter, a sedimentation-promoting blade fixed to the stirring shaft at a position across the liquid surface of the fermentation liquid in the fermenter, and the sedimentation-promoting Dispersing blades fixed in multiple stages in the vertical direction to the stirring shaft below the blades and formed shorter in the rotation radial direction of the stirring shaft than the sedimentation promoting blades .
The introduction position of the organic waste by the introduction mechanism is within the existence range of the dispersing blade in the height direction, and is closer to the length of the dispersing blade than the length of the sedimentation promoting blade in the radial direction of rotation of the stirring shaft. A fermentation processing device set inside the position or the length of the dispersing blade . The sedimentation promoting blade is set in an inclined posture in which the upper edge of the blade surface is inclined forward in the rotation direction of the stirring shaft from the lower edge, and the material to be treated floats on the entire liquid surface of the fermentation liquid in the fermenter . 2. The fermentation processing apparatus according to claim 1 , wherein the impeller is formed to extend to a position near the inner wall surface of the fermentation tank so as to settle in the fermented liquid on the surface of the impeller as it rotates. The stirring blade is fixed to the stirring shaft at the bottom position of the fermenter, and has a lower dispersing blade piece that disperses the material to be treated in the fermentation liquid, and a tip of the lower dispersion blade piece that is fixed to the bottom of the fermentation liquid and settles in the fermentation liquid. 3. The fermentation treatment apparatus according to claim 1, further comprising raking blades for raking up the unsuitable substances for fermentation to the unsuitable substance discharge mechanism. 4. The fermentation treatment apparatus according to any one of claims 1 to 3, wherein the dispersing blades are rod-shaped bodies having a circular or elliptical cross section. 5. The fermentation process according to any one of claims 1 to 4 , wherein the stirring shaft is rotatably supported by a lid disposed at the top of the fermenter, and is configured to be insertable and removable from the upper end of the fermenter. Device. The input mechanism includes a cylindrical casing fixed to the wall of the fermentation tank in a tilted posture with a predetermined tilt angle with respect to the horizontal surface so that the tip side faces downward, and a conveying mechanism installed inside the cylindrical casing. 6. The fermentation treatment apparatus according to any one of claims 1 to 5 , wherein the fermentation treatment apparatus comprises a transfer/loading mechanism including a mechanism and a drive mechanism for driving the transfer mechanism. 7. The fermentation treatment apparatus according to claim 6 , wherein a hopper mechanism having a lower end communicating with the wall of said cylindrical casing is provided, and materials to be treated having different origins fed into said hopper mechanism are premixed. . The mounting position of the hopper mechanism to the cylindrical casing is set so that the liquid surface of the fermentation liquid in the fermenter is located at the position where the hopper mechanism communicates with the wall of the cylindrical casing. Item 8. Fermentation treatment equipment according to item 7 . 7. The fermentation treatment apparatus according to claim 6 , further comprising a mounting position adjusting mechanism capable of adjusting a vertical mounting position of said feeding mechanism with respect to said side wall of said fermenter based on properties of the material to be processed. 10. The fermentation treatment apparatus according to claim 9 , further comprising a tip position adjusting mechanism capable of adjusting the position of the tip portion of the conveying/loading mechanism with respect to the radial direction of the fermenter based on properties of the material to be treated.

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