JP2010017695A - Method for drying and solidifying water-containing organic substance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for drying and solidifying water-containing organic substances by which the water-containing organic substances are dried and solidified properly at a low cost. <P>SOLUTION: The method involves an inoculation step of inoculating water-containing organic substances, which are not contaminated with germ in powder-like or granular or their agglomerate state, with aerobic bacteria; a drying step of drying the water-containing organic substances to a water content at which growth of the aerobic bacteria slows down by drying work of the propagation of the aerobic bacteria; and a molding step of molding the water-containing organic substances which are subjected to the water content adjustment in the drying step into a solid molded body by pressure with a molding apparatus. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention appropriately and efficiently dries and solidifies water-containing organic substances such as agricultural by-products, raw garbage, and livestock waste, and dries water-containing organic substances to produce soil activation materials, biomass fuel, and the like at low cost. The present invention relates to a solidification method.

  Organic wastes such as organic waste discharged in large quantities from mushroom production plants and food factories, raw garbage discharged from households, and large amounts of livestock excreta generated in the livestock industry are mainly used after being composted. However, composting typically results in the loss of most of the useful organic resources because the raw material is spoiled and reduced in weight. On the other hand, the price of crude oil has soared and the price of fuel has risen significantly.

Against this background, in order to reduce CO ₂ and prevent global warming, it is desired to use the water-containing organic matter more effectively as a biomass resource without reducing the amount. .
However, these organic substances (biomass resources) contain a large amount of moisture and need to be dried at an appropriate and low cost for effective use. And in order to make those biomass resources easy to handle, solidification is desired.
Then, the method of performing the drying and solidification with appropriate and low cost has become a subject.

On the other hand, the present inventor has already proposed a high-speed fermentative drying method for water-containing organic substances using microorganisms effectively (see Patent Document 1). According to this, since it can dry in large quantities in a short time without using petroleum energy, it becomes cost reduction. In addition, solidification was not examined here.
JP 2006-116529 A (first page)

Further, as a prior art, a method is disclosed in which organic sludge is dehydrated, the dehydrated organic sludge is molded and solidified into a cylindrical sludge molded body, and the cylindrical sludge molded body is dried and carbonized ( Patent Document 2).
JP 2001-17997 A (first page)

The problem to be solved with respect to the dry solidification method of the water-containing organic matter is that in the prior art dry solidification method, sewage is generated by adjusting the water content by dehydration. Therefore, it is impossible to perform processing at an appropriate and low cost, such as the need for such measures.
Then, the objective of this invention is providing the dry solidification method of the water-containing organic substance which can dry and solidify a water-containing organic substance at appropriate and low cost.

The present invention has the following configuration in order to achieve the above object.
According to one embodiment of the method for drying and solidifying a water-containing organic material according to the present invention, the step of inoculating a water-containing organic material that is not contaminated with bacteria, such as powders, granules, or aggregates thereof, with aerobic bacteria, and A drying step of drying the water-containing organic matter to a moisture content at which the growth of the aerobic bacteria slows down by a drying action caused by the propagation of the aerobic bacteria, and the water-containing organic matter whose water content has been adjusted by the drying step And a molding step of molding into a solid state by a molding machine.

  Moreover, according to one aspect of the method for drying and solidifying a water-containing organic matter according to the present invention, the water-containing organic matter is a mushroom waste fungus bed, and the fungus application step is performed after mushrooms have been harvested after harvesting of a fungus bed-cultivated mushroom is finished. It is characterized by being introduced by inoculating aerobic bacteria at a stage where there is little invasion of germs immediately after the hyphae are cut and the growth ability of the mushrooms is lost by being scraped off from the cultivation bottle, etc. be able to.

Moreover, according to one aspect of the method for drying and solidifying a water-containing organic material according to the present invention, the volume specific gravity of the water-containing organic material is adjusted to 0.3 to 0.7 before the drying step. Can do.
Moreover, according to one aspect of the method for drying and solidifying a water-containing organic material according to the present invention, the water content of the water-containing organic material can be adjusted to 25 to 45% by the drying step.

Further, according to one embodiment of the method for drying and solidifying a water-containing organic material according to the present invention, the drying step is performed by a drying box formed of a material having high air permeability such as a net or a lattice. Can be a feature.
Further, according to one aspect of the method for drying and solidifying a water-containing organic material according to the present invention, the drying box has a partition wall that is formed into a hollow wall shape and is ventilated by the material having high air permeability. It can be characterized by being provided.

In addition, according to one embodiment of the method for drying and solidifying a water-containing organic material according to the present invention, the water-containing organic material in which the aerobic bacteria are propagated is stirred and loosened before the molding step. .
Further, according to one embodiment of the method for drying and solidifying a water-containing organic material according to the present invention, it can be characterized in that after the molding step, it is packed in an air-permeable bag and naturally dried.
Moreover, according to one aspect of the method for drying and solidifying a water-containing organic material according to the present invention, at least a part of the water-containing organic material includes at least one of mushroom waste fungus bed, food residue, food waste, livestock dung, and organic sludge. Can be characterized.

  Moreover, according to the soil activation material or solid fuel concerning this invention, it manufactured by the said dry solidification method of the water-containing organic substance, It is characterized by the above-mentioned.

  According to the method for drying and solidifying a water-containing organic material according to the present invention, the water-containing organic material can be dried and solidified at an appropriate and low cost.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode example according to the method for drying and solidifying a water-containing organic material of the present invention will be described in detail based on the drawings (FIGS. 1 to 3).
FIG. 1 is an explanatory view showing an example of a water-containing organic matter drying system according to the present invention. FIG. 2 is a perspective view showing an example of the form of a drying box used in the drying process according to the present invention. Moreover, FIG. 3 is a perspective view which shows the other example of the box for drying used for the drying process concerning this invention.

  Here, the case where the waste fungi bed of the mushroom which is an example of the raw material of a water-containing organic substance is fermented and dried and solidified is demonstrated. This method of drying and solidifying a water-containing organic substance basically includes an aerobic bacterium attachment step, a drying step utilizing fermentation, and a molding step by pressure.

First, in the microbial application step, an aerobic bacterium is inoculated into a water-containing organic material that is not contaminated with various bacteria such as powders, granules, or aggregates thereof.
When the water-containing organic matter is a mushroom waste fungus bed, the fungus application process is scraped from the mushroom cultivation bottle after harvesting of the mushroom bed cultivation mushroom, etc. It may be performed by introducing an aerobic inoculum at a stage where there is little invasion of various germs immediately after being broken. The mushroom medium occupied by the mushroom hyphae is a sterile medium for other fungi due to the loss of viability of the mushroom, and the fungus can be propagated explosively by inoculating specific fungi. Can do.
In addition, the fungus bed cultivation of a mushroom may be performed by the bagged culture medium, and the mushroom waste fungus bed taken out from the cultivation bag may be utilized as a water-containing organic substance.

  This sterilization step can be performed by an apparatus system as shown in the upper part of FIG. In this system, the scraping device 21 can automatically scrape a mushroom waste fungus bed, which is a used medium in fungus bed cultivation of mushrooms, from a mushroom cultivation bottle. While the scraped mushroom waste microbial bed is transported by the horizontal conveyor 22, the seeds of aerobic bacteria are input by the microbial input device 23. The bacteria charging device 23 can be constituted by a screw-type or rotary-type powder supply device, and can automatically and uniformly load aerobic bacteria. The waste mushroom bed inoculated with aerobic bacteria is transferred to the storage tank 25 by the conveyor 24 and temporarily stored.

  The bacteria to be inoculated here are preferably aerobic bacteria and a group of psychrophilic bacteria. Being an aerobic bacterium has the advantage of promoting drying. Moreover, energy loss by being consumed as heat at the time of fermentation is small because it is a thermophilic bacterium. Furthermore, since it is an aerobic bacterium or a psychrotrophic bacterium, it not only produces a bad odor, but also has an effect of deodorizing by fermentation.

  By the way, it is advisable to loosen the water-containing organic matter using a ribbon mixer or the like before the fungus application step. According to this, it becomes easy to inoculate the inoculum uniformly, it is possible to promote the bacteria around and shorten the fermentation time. In the case of a mushroom waste fungus bed, mycelia can be broken apart to reduce the growth potential, and the growth of the inoculated fungus can be promoted.

  In addition, when the water content of the water-containing organic material is large, it is advisable to adjust the water content using a pulverized corn cob or the like. For example, if the moisture content is 70% or more, fermentation takes time and energy is consumed. Therefore, the moisture content may be adjusted by mixing a moisture adjusting material. In the case of mushroom waste beds, the water content is usually around 60%, and no adjustment is required. As the moisture adjusting material, paper, sawdust, dry grass material, etc. can be used in addition to the pulverized corn cob.

  In addition, in the case where the hydrated organic material is a material containing germs such as raw garbage, if the sterilization is performed by heat sterilization with superheated steam or the like, the bacteria can be promoted and the fermentation time can be shortened.

Next, in the drying step, the water-containing organic matter is dried to a moisture content at which the growth of the aerobic bacteria is slowed by the drying action caused by the propagation of the aerobic bacteria. Drying of the water-containing organic matter can be favorably promoted by the heat of fermentation of aerobic bacteria and the consumption of water by the growth of the bacteria themselves.
The degree of drying is preferably within a range that can be suitably solidified in the next molding step, and to an appropriate moisture content such that, for example, the friction resistance of an extrusion molding machine as described later does not become excessive. This degree of drying is almost equal to the water content at which the growth of aerobic bacteria slows down. For this reason, after drying by propagation of aerobic bacteria, it is possible to proceed to the next molding step immediately. Therefore, an efficient production system can be constructed.

  In practice, the water content of the water-containing organic material may be adjusted to 25 to 45% by this drying step. For example, the moisture content immediately after use of the mushroom waste fungus bed is around 60%, and it is good to dry using fermentation so that the moisture content is reduced to 25 to 45%. Thereby, sufficient adhesive force is produced in the water-containing organic substance, and it can be solidified into a required form in the next molding step. The water content of the water-containing organic material is preferably 30 to 40%. Thereby, the strongest adhesive force can be produced and better molding becomes possible.

In addition, before the drying step, when the volume specific gravity is high, the volume specific gravity of the water-containing organic material may be adjusted to 0.3 to 0.7. Preferably it is 0.4 to 0.6. Thereby, the circulation of air can be enhanced, the propagation of aerobic bacteria can be promoted, the drying time can be shortened, and the production efficiency can be improved. In addition, the measuring method of capacity specific gravity is calculated from the weight per volume when a raw material (hydrous organic substance) is thrown into a fermenter.
Further, as shown in FIG. 1, after the bacteria are attached, they are once deposited in the storage tank 25 to promote fermentation, and then dried by the drying box 10 described later, thereby speeding up the bacteria and shortening the drying time. it can.
In order to promote fermentation and drying in winter, etc., the water-containing organic matter in the drying box 10 is removed by the heating device 26 using the dry matter obtained by this system as a fuel as shown in FIG. You may heat.

Moreover, this drying process is performed by the drying box 10 (see FIG. 2 or FIG. 3) formed of a highly air-permeable material such as a net or lattice, so that the drying time can be further shortened. This is because air permeability is good and the portion in contact with the material (hydrous organic matter) can be made as small as possible, so that fermentation can be promoted and natural drying by air flow can be promoted.
As a highly breathable material such as a mesh or lattice that forms each component surface of the drying box 10, a lath net, a wire net, a perforated plate, or a net material in which a string is knitted can be used. .

And since the drying box is provided with a partition wall 12 that is formed in a hollow wall shape and is ventilated by a material having high air permeability as described above, the drying speed can be further increased. . The drying box 10 in FIG. 2 has a partition wall 12 fixed in the left-right direction, and the drying box 10 in FIG. 3 has a partition wall 12 fixed in the front-rear direction. Further, the frame of the drying box is made of a rod, and has a structure in which a net is stretched around the frame, so that the weight is reduced.
The hollow of the partition wall 12 is a space in which water-containing organic matter is prevented from entering and air can circulate. Therefore, the upper surface portion of the partition wall 12 may be covered with the above-described material having high air permeability so that the air permeability is sufficient and water-containing organic matter does not enter the inside.

Further, in the drying box 10 of the present embodiment, a square tube 15 into which the forklift claws enter is fixed to the bottom so that the forklift can be reversed by a forklift having a claw that can be reversed about a horizontal axis. And as for the cross-sectional shape of the partition wall 12 of the drying box, the upper side is a tapered shape (see FIG. 2 or FIG. 3).
According to this, when storing a water-containing organic substance, a frontage is wide and it is easy to put in. When the drying box is inverted, the water-containing organic matter can be dropped and easily discharged (see FIG. 1). Therefore, workability can be improved and production efficiency can be improved.

Moreover, according to this drying box 10, it is possible to stack and store as shown in FIG. 1, and it is possible to perform fermentation drying by effectively using the height space even in a small area, Productivity can be improved.
By the way, this drying box is a net cage with a rational form of netting, and is used as a fermentation drying tank in the present invention, but it may be used as another drying tank that does not utilize the fermentation action. For example, it can be used for drying other water-containing organic substances such as wood chips.

Next, in the molding step, the water-containing organic substance whose water content has been adjusted by the drying step is molded into a solid form by a molding machine 30 (see FIG. 1) using pressure.
According to this, the water-containing organic substance dried to a required water content can be solidified by the pressurizing effect without adding an adhesive additive. The adhesive additive is not required because the carbohydrates and other nutrients contained in the raw material, and chitosan present in the mycelia (cell walls) of cocoons and fungi exert the effect as an adhesive material. Conceivable.

  And when making into a pellet form as a form of shaping | molding, as the molding machine 30, the extrusion molding machine pressurized with a screw can be used, for example. According to such an extrusion molding machine, the water-containing organic substance can be made to exhibit adhesiveness by kneading in a pressurized state. This is because kneading the water-containing organic material can destroy the cells that make up the water-containing organic material and draw out the adhesive components, and these adhesive components are mixed well with moisture, resulting in strong adhesiveness. It is done.

Moreover, as an extrusion molding machine, what has a structure which extrudes a columnar molded object from an extrusion port, compressing with a uniaxial cantilever-type screw can be used. As the extrusion port of this extrusion molding machine, for example, one having a shape in which a large number of holes are opened in the standing face plate can be used.
According to this, it is possible to extrude, for example, a thin columnar dry solid having a diameter of about 6 mm into a large number of streaks from a large number of holes. The extruded dry solid matter is cut into pellets by its own weight so as to be naturally cracked within a predetermined length range. According to this, pelletized dry solids can be efficiently produced in large quantities with a simple apparatus configuration.
It should be noted that the form of the dry solid made of the water-containing organic material is not limited to this, and it is a matter of course that dry solids having various shapes and sizes can be formed.

Moreover, according to the shaping | molding process concerning this invention, it will press and solidify the water-containing organic substance which the aerobic microbe (useful microbe) propagated, and a useful microbe will be activated very much by the external force. For this reason, in the solid material in which the fermented mushroom waste fungus bed was formed into a pellet, useful bacteria proliferated explosively, and the mycelium grew until the entire surface of the solid material was completely covered with white.
According to this, the pellet-shaped solid substance can be utilized as an excellent inoculum of useful bacteria.

Moreover, it is good to stir and loosen the water-containing organic substance in which aerobic bacteria propagated using a ribbon mixer etc. before a shaping | molding process. When aerobic bacteria propagate, water-containing organic substances tend to clump due to their nature. For this reason, by uniformly loosening the lump and making it into a granular form, it is possible to make the moisture uniform in the material made of the water-containing organic matter. Thereby, a more homogenized dry solid can be obtained.
In addition, although a granular fragment is produced at the time of shaping | molding of a water-containing organic substance, this should be isolate | separated by sifting etc., and what is necessary is just to mix with a water-containing organic substance again as a raw material of moisture adjustment.

Furthermore, after the molding step described above, if the bag is packed in air-permeable bag and allowed to dry naturally, the drying can proceed efficiently. As the bag having high air permeability, a bag made of a woven fabric can be used.
In addition, when dryness becomes high by further drying as mentioned above, a dry solid will become firm and will become hard and shape retention property will improve.

  Although the case where the mushroom waste fungus bed is used as the raw material (hydrous organic material) has been described above, the present invention is not limited to this. In other words, the present invention can be suitably applied when at least a part of the water-containing organic substance contains at least one of mushroom waste fungi bed, food residue, raw garbage, livestock dung, and organic sludge, when it is dried and solidified.

Moreover, this invention exists also in the soil activation material or solid fuel manufactured by the dry solidification method of the water-containing organic substance as described above. In addition, when using as a solid fuel, since a material is decomposed | disassembled by propagation of an aerobic microbe, the combustibility improves.
Further, the product produced by the method for drying and solidifying a water-containing organic material according to the present invention can be effectively used as another dry organic material, or as a fermentation base material or a seed for effective bacteria. In particular, as a fermentation base or an inoculum of effective bacteria, it can be suitably used as a blur for treating composting garbage.

  As described above, the present invention has been variously described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and it is needless to say that many modifications can be made without departing from the spirit of the invention. That is.

It is explanatory drawing which shows the example of the form of the drying system of the water-containing organic substance concerning this invention. It is a perspective view which shows the example of the form of the box for drying concerning this invention. It is a perspective view which shows the other example of a form of the drying box concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Drying box 12 Partition wall 15 Square tube 21 Scraping device 22 Conveyor 23 Fungus throwing device 24 Conveyor 25 Storage tank 26 Heating device 30 Molding machine

Claims (10)

A step of attaching aerobic bacteria to water-containing organic matter that is not contaminated with bacteria of powdery or granular or aggregates thereof;
A drying step of drying the water-containing organic matter to a moisture content at which growth of the aerobic bacteria slows down by a drying action caused by propagation of the aerobic bacteria;
A method for drying and solidifying a water-containing organic material, comprising: a step of forming the water-containing organic material whose water content has been adjusted by the drying step into a solid state using a press machine.   The water-containing organic matter is a mushroom waste fungus bed, and the fungus application process is such that the mycelium is cut off from the mushroom cultivation bottle after harvesting of the fungus bed-cultivated mushrooms and the mushroom growth ability is increased. 2. The method for drying and solidifying a water-containing organic material according to claim 1, wherein the method is carried out by introducing an inoculum of an aerobic bacterium at a stage where there is little invasion of various bacteria immediately after being lost.   The method for drying and solidifying a water-containing organic material according to claim 1 or 2, wherein the volume specific gravity of the water-containing organic material is adjusted to 0.3 to 0.7 before the drying step.   The method for drying and solidifying a water-containing organic material according to any one of claims 1 to 3, wherein the water content of the water-containing organic material is adjusted to 25 to 45% by the drying step.   5. The dry solidification of the water-containing organic material according to claim 1, wherein the drying step is performed by a drying box formed of a material having high air permeability such as a net or a lattice. Method.   6. The drying box is provided with a partition wall that is formed into a hollow wall shape and is ventilated by the air-permeable material. A method for drying and solidifying water-containing organic matter.   The method for drying and solidifying a water-containing organic material according to any one of claims 1 to 6, wherein the water-containing organic material on which the aerobic bacteria have propagated is stirred and loosened before the forming step.   The method for drying and solidifying a water-containing organic material according to any one of claims 1 to 7, wherein after the molding step, the bag is packed in a breathable bag and naturally dried.   The dried organic organic matter according to any one of claims 1 to 8, wherein at least a part of the organic organic matter contains at least one of mushroom waste fungus bed, food residue, raw garbage, livestock dung, and organic sludge. Solidification method.   A soil activating material or a solid fuel produced by the method for drying and solidifying a water-containing organic material according to any one of claims 1 to 9.

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