JPH01135576A - Plant for treatment of organic waste - Google Patents

Abstract

PURPOSE:To treat an organic waste efficiently with a reduced energy consumption by arranging a fermenter consisting of a far infrared ray heater, an agitator and an air suction and exhaust equipment and also by arranging a boiler which utilizes an organic substance treated by the fermenter as a fuel and supplies a generated heat to the heater of the fermenter. CONSTITUTION:A zymogen and an organic waste (e.g., wheat bran, tofu refuse, etc.) are put into a fermenter 1 and agitated together by an agitator 3 while they are irradiated by a far infrared ray from a far infrared ray heater 9 and the zymogen is activated by oxygen supplied by an air suction and exhaust equipment so as to decompose the organic waste and to convert it into an organic fertilizer or an organic feed. This particulate organic fertilizer, etc., is supplied to a boiler 14 from a silo 10 by a screw conveyer 11 as a fuel after transported to the silo 10 and stored there. A heat energy obtained by combusting the organic fertilizer, etc., in this boiler 14 is supplied to the far infrared heater 9 in the fermenter 1 through a heat exchanger 15 to keep a temperature in the fermenter 1 at an appropriate temperature for fermentation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a treatment plant system (apparatus) for efficiently treating organic waste such as bran produced in a beer factory or okara produced in a tofu factory.

(Prior Art) In food factories and the like, organic waste that cannot be used as is is generated during the process of manufacturing target foods. For example, as the above organic waste,
Bran in beer factories, okara in tofu factories,
There are a variety of sources, including medicinal herb scraps from a Chinese medicine manufacturing factory, fish bones or skin from a kamaboko factory, blood donations from a meat factory (including slaughterhouses), and vegetable scraps from a pickle factory.

Currently, most of these organic wastes are collected by garbage trucks and the like, and then disposed of in incinerators run by local governments.

(Problem to be solved by the invention) However, in each food factory, etc., the above-mentioned organic waste is produced in a considerable amount and requires a considerable amount of expense for the above-mentioned treatment, resulting in the loss of products. This will push up manufacturing costs. The current situation is that this is hindering the current rationalization of production.

On the other hand, on the processing side, incineration facilities in local governments are unable to cope with the amount of industrial waste that is increasing year by year.
Currently, the situation is at or near bank level, and appropriate countermeasures are being taken, such as increasing the number of incinerators or providing guidance on promoting disposal within each company.

Furthermore, if the waste is organic waste as described above, it will rot if it is not disposed of promptly, causing a pollution problem such as emitting a strong odor in the vicinity.

The present invention was made in view of the above-mentioned social demands, and an object of the present invention is to provide a treatment plant system that can effectively treat organic waste generated within a company.

(Means for solving the problem) The organic waste treatment plant system according to the present invention includes:
A fermentation tank for fermenting organic waste, a silo for storing the organic matter processed in the fermentation tank and used as fertilizer or feed, and a silo that uses the organic matter in the silo as fuel and supplies the heat generated here to the fermentation tank. A processing plant system comprising a boiler, wherein the fermentation tank is disposed inside the fermentation tank and hot water (including water close to the boiling point) is supplied from the boiler.

The device includes a far-infrared heater that heats the inside of the tank by heating the inside of the tank (the same applies in this specification), a stirring device that stirs (also referred to as cutting back) the organic waste in the tank, and an intake and exhaust device that supplies air into the tank. The silo is characterized in that it has a supply device for supplying the organic matter stored inside to the boiler side and an outlet for directly discharging it to the outside.

(Function) Therefore, the organic matter treatment plant system having the above configuration functions as follows. In other words, if an aerobic fermentation surface and organic waste are placed in the fermentation tank, outside air containing oxygen will be supplied to the fermentation tank by the suction/exhaust device, and the organic waste mixed with the fermentation surface in the fermentation tank will be removed. The organic waste is heated to a predetermined temperature by far infrared rays emitted from a far infrared heater or by heat transfer using the air in the tank as a medium, and oxygen is supplied to the organic waste by stirring with a stirring device. As a result, the activity of the fermentation surface becomes extremely active, and the decomposition of organic waste takes place in an extremely short period of time, and after a certain period of time, the organic waste becomes organic fertilizer or organic feed (organic matter). Organic matter such as organic fertilizer is stored in a silo, and a portion of it is supplied by a supply device as fuel to a boiler, which heats a wood pipe connected to a heater in a fermentation tank.

In this way, separate fuel is required for the boiler until the first organic matter such as organic fertilizer is generated, but once organic matter is generated, this system can generate it without the need for external fuel. Some of the organic matter produced can be used to burn boilers. In addition, other surplus organic matter can be discharged from the outlet at the bottom of the silo and used (sold) as fertilizer or feed.

Furthermore, when all the organic matter is burned, the heat can be used to supply thermal energy to other parts of the factory or the like for heating or hot water supply.

Moreover, with the above configuration, this system allows the decomposition of organic waste by the fermentation surface to occur in an extremely short time.
Organic waste can be efficiently and continuously processed.

In addition, in order to optimize the fermentation environment, the organic waste to be inputted above should have a moisture content of approximately 60 to 70%. This condition can be achieved by pretreatment such as squeezing or drying before inputting. It may be done by doing this, or it may be done by mixing dry rice bran or the like when adding it.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall configuration diagram showing a partial internal structure of the organic waste treatment plant system according to this embodiment, FIG. 2 is a block diagram showing the processing procedure in the system of FIG. 1, and FIG. An enlarged view showing a more detailed structure of the fermenter in Figure 1,
FIG. 4 is a view taken along arrow 1-1 in FIG.

In the figure, reference numeral 1 denotes a fermentation tank, and this fermentation tank l has a substantially rectangular parallelepiped shape as a whole, and as shown in FIG. 4, the internal bottom surface 1b is in the shape of a U-shaped groove extending in the longitudinal direction of the tank. A heat insulating material IC is interposed between the inner wall IA and the outer wall IB of the fermentation tank 1 in order to enhance the heat retention effect.

In the figure, reference numeral 2A denotes an input port, and the input port 2A is formed by opening a part of the sloping upper surface 1a of the fermentation tank 1, and erecting a duct 2a upward from the opening.

Further, in the figure, reference numeral 3 denotes a stirring device, and a rotating shaft 3a of this stirring device 3 is rotatably supported at both ends by bearings integrally provided on the outer wall IB of the fermentation tank I.

3 or °4 on the rotating wheel 3a.
As shown in the figure, a set of two stirring plates (cut-back plates) 3b arranged diagonally in a straight line are arranged at appropriate intervals in the longitudinal direction of the rotating shaft. They are arranged so as to be shifted by 45 degrees in the axial circumferential direction. That is, as shown in FIG. 4, each set of stirring plates 3b, such as ^-A, BB, CC, and DD, is shifted by 45 degrees in the circumferential direction. , each arranged.

This stirring plate 3b has a length such that its tip almost contacts the U-shaped bottom surface 1b of the fermentation tank 1 so that stirring can be performed without leaving anything at the bottom of the fermentation tank. It is configured to rotate along the groove-shaped bottom surface 1b. Further, in this embodiment, although not shown, the stirring plate 3b is attached to have a pitch angle with respect to the axis of the rotating shaft, and at the same time as stirring necessary for fermentation, the stirring plate 3b is finally rotated in the axial direction (left side in FIG. ) is configured to convey the material to be stirred (organic waste).

The rotating shaft 3a is configured to be driven by an electric motor 4 disposed outside the fermentation tank l via a chain 5.

A discharge port 2B for discharging the produced organic fertilizer or organic feed from the fermentation tank 1 is arranged at the bottom of the end face of the stirring device of the fermentation tank 1 (on the left side in FIG. 1). There is.

In addition, in order to bring in oxygen-rich outside air into the fermenter 1,
An intake port 6 is provided on one end surface of the fermentation tank 1, and an exhaust lower is formed on the other end surface by a duct that bends upward, and an exhaust fan 8 is provided in the duct on the exhaust lower side to forcefully exhaust the air. (See Figure 1) is provided.

A far-infrared heater 9 is disposed on the upper surface of the inner wall IA of the fermentation tank 1 to heat the inside of the fermentation tank 1 and promote activation of fermentation bacteria. As shown in FIG. 5, each pipe constituting this far-infrared heater 9 is made of a stainless steel pipe 9a whose surface is made of a material with high far-infrared emissivity (for example,
A ceramic coated with alumina oxide, ZnO-based ceramic, ZnO-based ceramic (in the case of this example, alumina oxide-based ceramic) 9b is used. And far infrared heater 9
is formed by overlapping the coated pipes in a U-shape. As will be described later, this far-infrared heater 9 is connected to the water pipe side of the boiler 14 via a heat exchanger 15, and hot water is supplied to the inside of the pipe forming the far-infrared heater 9.

In FIG. 1, IO is a silo for storing fertilizer or feed, and this silo 10 has a cylindrical part 1 for storage at the top.
0a and an outlet 10b for discharging are provided at the bottom. In addition, at the bottom of the silo IO, a tip 11b is provided.
Im population 11a of the screw conveyor 11 is located at the fuel supply port 14a of the boiler 14. This screw conveyor 11 is driven by an electric motor 11C located below the silo 10.

The upper part of the silo 1O is connected to an outlet 2B formed at the bottom of the fermentation tank 1 and a cyclone device 12 for transportation.
They are connected by a pipe 413.

Further, in FIG. 1, numeral 14 is a boiler for supplying hot water to the fermentation tank 1, and this boiler 14 is configured to mainly burn fertilizer etc. supplied from the silo 10. Therefore, the fuel supply port 14a of the boiler 14 is connected to the discharge port (tip) 11 of the screw conveyor 11.
silo 10 is located therein, and fertilizer etc. are supplied from the silo 10. Moreover, the upper part in the boiler 14,
That is, a water pipe 14b is disposed at an upper position where fertilizer etc. are burned, and this water pipe 14b connects to the heat exchanger 1 outside the boiler 14.
5. Furthermore, a blower fan 14A for supplying air to the boiler 14 is disposed above the fuel supply port 14a.

Incidentally, the heat exchanger 15 is connected to the far-infrared heater 9 of the fermentation tank 1 with outbound and return conduits 19 and 20. B. The heat exchanger 15 transfers heat from the water pipe 14b of the boiler 14 to the pipe line 19°20 side. The pipes 19 and 20 are connected to the heat exchanger 15 and the far infrared heater 9. ! : A circulation path is formed between the two.

Further, the conduit 19 going to the heat exchanger 15 is branched, and piping is arranged so that hot water can be supplied to another part F side of the factory (not shown).

Further, in the figure, 17 is a water tank for replenishment, and this tank 17 is connected to a return pipe 20 near the heat exchanger 15 through a pipe 18, and the water is circulated from the boiler 14 to the far-infrared heater 9. It is configured to replenish (supply) water to the pipe line when the water (hot water) decreases or when hot water is supplied to the other part F side of the factory.

The exhaust port 14c of the boiler 14 is connected to the cyclone device 1
6, and is configured so that the exhaust gas is discharged to the atmosphere after removing dust and the like.

Thus, this treatment plant system configured as described above executes the treatment steps shown in FIG. 2. The operation of this system will be explained below along with this processing step.

First, prior to use, separately prepared fuel (which may be heavy oil, firewood, or previously prepared fertilizer, etc.) is supplied to the boiler 14 to heat the far-infrared heater 9 via the heat exchanger 15. Here, in this treatment plant system, in order to maintain the temperature of the organic waste in the fermentation tank 1 at about 70° to 80", the hot water is pipe valves that regulate flow;
Or adjust the combustion conditions of the boiler. In addition, the exhaust fan 8 is operated to exhaust air from the exhaust lower and introduce oxygen-rich outside air from the intake port 6 so that the oxygen concentration in the fermentation tank 1 can be maintained at a certain level or higher.

In this state, the moisture content is 6 from the input port 2A.
Organic waste adjusted to 0 to 70% and fermentation bacteria (in this example, Uchijo bacteria (also referred to as MU bacteria) are used) are introduced. This organic waste may be of any kind, such as bran, okara, or donated blood.

The fermentation bacteria and organic waste that have been added are stirred by the stirring device 3 in the fermentation tank 1, and are made to have a roughly even height (flattened), and the fermentation bacteria and organic waste are mixed into the organic waste. At the same time, oxygen is supplied to the fermenting bacteria.

For this reason, fermentation bacteria are placed in an optimal environment for decomposition.

Under such an environment, organic waste can be decomposed most efficiently. In particular, by irradiating the far infrared rays from above to below the far infrared heater 9, the fermentation bacteria are activated and decomposed rapidly.

Incidentally, organic waste is introduced into the fermentation tank 1 at predetermined time intervals or continuously.

After a predetermined period of time has elapsed since the initial input, the initially input organic waste is repeatedly moved to the left and right in FIG. , it moves from the vicinity of the input port 2A to the vicinity of the discharge port 2B (to the left) over a predetermined period of time. Near this outlet 2B, the organic waste is completely decomposed and becomes high-quality organic fertilizer or organic feed. That is, these organic fertilizers or organic feeds are in the form of powder or granules.

Here, due to the action of the cyclone device 12, air flows in the pipe line 13 connecting the fermentation tank l and the silo IO from the fermentation tank l side toward the silo 10 side, and this air flow causes the organic matter in the powder and granules to be removed. Fertilizer or organic feed (referred to as organic fertilizer, etc.) is carried upwards, then falls to the silo 10 side,
It is transported into the silo 10.

In this way, over time, within the silo 10,
Good quality organic fertilizer etc. will be stored.

Then, these organic fertilizers, etc. are transferred from the bottom of the silo to the fuel supply port 1 of the boiler 14 by a screw conveyor 11.
4a, and is used as fuel for the boiler 14. Thereafter, the boiler 14 is switched from the original fuel (for example, heavy oil, etc.) to organic fertilizer, etc., and burns exclusively using the organic fertilizer, etc. on the silo 10 side as fuel.

The thermal energy obtained by burning organic fertilizer, etc. is
Similarly to the above, it is supplied to the far-infrared heater 9 of the fermenter 1 via the heat exchanger 15, and is used to maintain the temperature inside the fermenter 1. Furthermore, this thermal energy is supplied to other parts of the factory or used for heating purposes, etc., as necessary.

Furthermore, the combustion gas (exhaust gas) burned in the boiler 14 is removed from the combustion gas by a cyclone device 16, and is discharged into the atmosphere as clean exhaust gas.

In addition, generally, the organic fertilizer etc. used as fuel for the boiler is a part of the organic fertilizer etc. produced in quantity, and those that are not used for combustion are taken out from the lower outlet lOb of the silo 10 as fertilizer or It will be used (sold, etc.) for its original purpose as feed. Additionally, if a large amount of heat is required for hot water supply or space heating in a factory, etc., the entire amount of organic fertilizer, etc. produced can be burned and the resulting heat energy can be used. .

Although not specifically explained in the above explanation, in the processing plant system, the rotation of the stirring device of the fermentation tank (intermittent rotation may be used), the conveyance amount of the cyclone device for conveyance, and the screw conveyor. is organically and centrally controlled in accordance with the production N (production time) of organic fertilizer, etc. Furthermore, once fermentation bacteria are initially introduced into boat fishing, they will propagate within the fermentation tank, so there is no need to replenish them for a certain period of time.

(Effects of the Invention) As described above, the treatment plant system according to the present invention performs treatment very efficiently, and therefore produces the following effects. In other words, by burning a portion of organic waste, which has conventionally been a cause of increasing the manufacturing cost of products, it can supply the heat necessary for its own processing, without causing any disadvantages such as bad odors. Most of it can be obtained as high-quality fertilizer or feed, and if necessary, the heat energy required for factories can be obtained by burning the fertilizer, etc., and organic waste, which was previously disadvantageous, can be obtained. This in turn makes it possible to reduce manufacturing costs.

In addition, since the organic waste discharged at a factory can be treated immediately at the factory, there is no need to leave it for a predetermined period of time and emit a strong odor to the surrounding area, as was the case in the past. Furthermore, when processing organic waste, it does not emit a strong odor to the surrounding area.

Furthermore, since local governments, etc., process the organic waste generated at each factory, the amount of organic waste to be processed will be significantly reduced, reducing the burden on local governments.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of the organic waste treatment plant system according to this embodiment, Fig. 2 is a block diagram showing the processing procedure in the system of Fig. 1, and Fig. 3 is a diagram of the fermentation tank shown in Fig. 1. Figure 4 is an enlarged view showing the detailed structure of Figure 3.
5 is a cross-sectional view of a pipe constituting the far-infrared heater, showing the structure of the far-infrared heater. 1... Fermentation tank, 3... Stirring device, 6... Inlet port,
7...Exhaust port, 8...Exhaust fan, 9...Far infrared heater, lO...Silo, 10b...Takeout port (discharge port), 11...Screw conveyor (supply bag M
), 14...Boiler.

Claims (1)

[Scope of Claims] A fermentation tank for fermenting organic waste, a silo for storing the organic matter processed in the fermentation tank and used as fertilizer or feed, and a silo that uses the organic matter in the silo as fuel and the heat generated therein. A processing plant system comprising: a boiler that supplies the fermentation tank to the fermentation tank; The silo has a stirring device that stirs the organic waste inside the tank, and an intake/exhaust device that supplies air into the tank, and the silo has a supply device that supplies the organic matter stored inside the tank to the boiler side, and a supply device that directly supplies the organic waste stored inside the tank. An organic waste treatment plant system characterized by having an outlet for discharging to the outside.