JPH07944A - Garbage treating device - Google Patents

Abstract

PURPOSE:To simplify a system, minimize floor space and facilitate maintenance by successively installing a garbage intake section, anaerobic bed, device for sepn. of solid from liquid, aerobic bed and draining section from the lower part to the upper part within a treating vessel. CONSTITUTION:A three-way valve 15 is first changed over to feed the pulverized garbage from the intake section 5 in the lowermost position of the treating vessel 1 into the anaerobic bed 7 right above this section by a pump 17 at the time of treating of the garbage with the garbage treating device 3. The garbage is decomposed to soluble org. matter by the anaerobic bacteria of the anaerobicbed. Pimarily treated water subjected to the decomposition treatment is then passed through separating membranes 21 of the layer 9 for sepn. of solid from liquid and on the other hand, the solids subjected to the decomposition treatment are blocked by the separating membranes 21 and are settled in the bottom of the anaerobic bed 7. In succession, the primarily treated water is sent into the aerobic bed 11 of the uppermost position and is decomposed to secondary treated water of good quality by the effect of aerobic bacteria filter bed materials 25 and an air supply pipe 27, thereafter, this treated water is discharged outside the treating vessel 1 from the draining section 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kitchen waste treating apparatus suitable for treating kitchen garbage produced at home.

[0002]

2. Description of the Related Art Conventionally, a garbage disposal device has been known as a means for collectively disposing of garbage such as garbage from an apartment house or a large number of households.

An outline of the kitchen waste treatment apparatus has a large number of treatment tanks such as a pretreatment tank, a fermentation tank, a sludge separation tank, a conditioning tank, an aeration tank, and a precipitation tank. The first half side decomposes organic solid matter by anaerobic bacteria. It is an anaerobic treatment. On the other hand, the latter half is an aerobic treatment in which dissolved organic substances subjected to anaerobic treatment are further decomposed by aerobic bacteria, and the system is a system in which treated water subjected to aerobic treatment is passed to sewage.

[0004]

As described above, in the conventional garbage treating apparatus, the aerobic treatment with aerobic bacteria requires a large amount of oxygen, while the anaerobic treatment with anaerobic bacteria is required. Does not require oxygen, and conversely, oxygen is a factor that reduces the decomposition treatment capacity during anaerobic treatment. For this reason, since the anaerobic treatment tank and the aerobic treatment tank need to be provided separately, a large installation space is required and the system itself becomes complicated.

Therefore, an object of the present invention is to provide a garbage disposal device which simplifies the system and requires a small installation space.

[0006]

In order to achieve the above-mentioned object, the present invention is arranged in order from the bottom of a processing tank and is provided at the lowest position to take in crushed kitchen waste and to take in from the taking-in section. An anaerobic layer that decomposes kitchen waste with anaerobic bacteria, a solid / liquid separation layer that separates solid matter decomposed by the anaerobic layer into primary treated water, and the solid / liquid separation layer to which oxygen is applied. An aerobic layer that uses the primary treated water separated as a secondary treated water as a secondary treated water and a drainage unit that discharges the secondary treated water from the aerobic layer to the outside are provided.

[0007]

According to such a garbage treatment device, the organic solid matter such as crushed kitchen refuse taken in from the lowest intake portion is decomposed into the soluble organic matter by the anaerobic layer, and the solid matter above
It is sent to the liquid separation layer.

In this solid / liquid separation layer, solid matter and primary treated water are separated, and only the primary treated water is sent to the upper aerobic layer and further decomposed in the aerobic layer.
At this time, the flow in the treatment tank is from the bottom to the top, and since the solid / liquid separation layer is arranged between the anaerobic layer and the aerobic layer, the oxygen in the aerobic layer is increased. Does not flow into the lower anaerobic layer and does not adversely affect the anaerobic treatment.

On the other hand, the primary treated water from the solid / liquid separation layer is
Further decomposed in the aerobic layer, the decomposed secondary treated water is drained to the outside from the drainage section.

Therefore, only one processing tank is required and a large occupied installation space is not required. Also, the system becomes simple.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings of FIGS.

In FIG. 1, reference numeral 1 denotes a processing tank of the garbage processing apparatus 3, and the processing tank 1 has an intake section 5, an anaerobic layer 7, and an order from the bottom.
A solid / liquid separation layer 9, an anaerobic layer 11, and a drainage section 13 are provided respectively.

The lowest intake part 5 has a three-way valve 15, which is shown in FIG. 2 and has a first port P1 leading to the bottom 1a of the treatment tank 1 and a sink (not shown). Has a second port P2 leading to a pump 17 that compulsorily discharges the garbage crushed by the garbage crusher provided with the drainage from the sink and a third port P3 leading to the drain pipe 19, and operates the three-way valve 15. And then the 1st, 2nd, 3rd port P
By selecting 1, P2, and P3, processing tank 1 as shown in Fig. 2
As shown in FIG. 3, the bottom portion 1a and the pump 17 of the processing tank 1
The bottom portion 1a and the drain pipe 19 are connected and communicate with each other.

The anaerobic layer 7 has acid-producing bacteria, methanogenic bacteria, etc. in addition to main hydrolyzing bacteria which are located above the intake part 5 and become anaerobic bacteria. A hydrolysis process for producing soluble organic substances from high molecular weight organic substances can be obtained. In addition, the acid production process of producing fatty acids and hydrogen from the hydrolysis products of acid-producing bacteria and the methane production process of producing methane and carbon dioxide from hydrogen and fatty acids by methanogenic bacteria were obtained and decomposed. The solid matter precipitates, and the decomposed water flows upward in an upward flow.

The solid / liquid separation layer 9 is a liquid layer that partitions the lower anaerobic layer 7 and the upper aerobic layer 11, and a separation membrane through which the primary treated water decomposed in the anaerobic layer 7 passes. 21
have. In the region of the solid / liquid separation layer 9, an upward flow slowly flows from the bottom to the top, and this flow is set so as to be faster than the diffusion rate of the dissolved oxygen from the aerobic layer 11 flowing into the anaerobic layer 7 side. Thus, the inflow of oxygen to the anaerobic layer 7 is blocked.

The aerobic layer 11 is located above the solid / liquid separation layer 9 and functions to obtain secondary treated water that can be discharged to the outside after being decomposed by aerobic bacteria and treated.
3 has an aerobic filter bed material 25 fixed and supported thereon, and an air supply pipe 27 in the lower part thereof.

The aerobic filter bed material 25 has a bellows shape as shown in FIG. 4, but may have a block shape as shown in FIG. Further, as shown in FIG. 6, it may have a disc shape.

By making the aerobic filter bed material 25 into a disk shape, as shown in FIG. 7, the rotary power from the motor 29 is rotatably mounted on the rotary shaft 33 given through the speed reducer 31. By doing so, during rotation, it is possible to take in oxygen from above and to omit the air supply pipe 27. As a result, there is an advantage that the total height H of the processing tank 1 can be suppressed low.

On the other hand, the air supply pipe 27 is connected to an air pump (not shown) so that air is supplied from the air pump.

The discharge part 13 functions to discharge the secondary treated water decomposed by the aerobic layer 11 to the outside, and the drain valve 3
It can be opened and closed by controlling the operation of 5.

According to the garbage treatment apparatus thus constructed, the garbage that is crushed by the pump 17 by switching the three-way valve 15 to the one shown in FIG. 2 is fed from the lowest intake portion 5 to the anaerobic layer 7.
Sent to. The sent garbage is decomposed in the anaerobic layer 7 by anaerobic bacteria into soluble organic substances. The decomposed primary treated water is passed through the separation membrane 21 of the solid / liquid separation layer 9.
Pass through. On the other hand, the solid matter is blocked by the separation membrane 21 and begins to settle on the bottom of the anaerobic layer 7 due to its own weight.
After that, the crushed kitchen waste from the intake section 5 is sequentially subjected to anaerobic treatment in the anaerobic layer 7. In this case, oxygen (air) in the aerobic layer 11 is removed by the solid / liquid separation layer 9 located between the upper aerobic layer 11 and the lower anaerobic layer 7 and by the upward flow flowing upward. There is no possibility of flowing into 7, and good anaerobic treatment becomes possible.

On the other hand, in the solid / liquid separation layer 9, the primary treated water separated into the solid matter and the primary treated water is sent to the upper aerobic layer 11 in a slow ascending flow.

The primary treated water sent to the aerobic layer 11 is decomposed into the secondary treated water of higher quality by the air supplied from the air supply pipe 27 and the aerobic bacteria filter bed material 25, and then the secondary treated water is subjected to the secondary treatment. The treated water is drained from the drainage unit 13 to the outside.

In this series of operations, since only one processing tank 1 is required, the occupied installation space can be made small. Moreover, the system is simplified because each processing layer is housed in one processing tank 1.

Further, the precipitate accumulated at the bottom of the processing tank 1 is
By switching the three-way valve 15 as shown in FIG. 3, it becomes possible to easily perform the discharging process to the outside.

[0026]

As described above, according to the garbage processing apparatus of the present invention, the occupied installation space can be small and the system can be simplified. Also, it is very preferable in terms of maintenance.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a garbage processing device embodying the present invention,

FIG. 2 is an operation diagram of a three-way valve,

FIG. 3 is an operation diagram of a three-way valve,

FIG. 4 is a perspective view of an aerobic filter bed material,

FIG. 5 is a perspective view similar to FIG. 4 showing a modified example of a filter bed material for aerobic bacteria.

FIG. 6 is a perspective view similar to FIG. 4, showing a modified example of a filter bed material for aerobic bacteria.

FIG. 7 is a schematic sectional view similar to FIG. 1, in which a disk-type aerobic filter bed material is applied to the aerobic layer.

[Explanation of symbols]

 1 Treatment Tank 5 Intake Port 7 Anaerobic Layer 9 Solid / Liquid Separation Layer 11 Aerobic Layer 13 Drainage Portion

Claims (1)

[Claims] 1. An intake section, which is arranged in order from the bottom of the treatment tank and is provided at the lowest position, for receiving crushed garbage, and an anaerobic layer for decomposing the crushed garbage taken from the intake section with anaerobic bacteria. The solid / liquid separation layer for separating the solid matter decomposed by the anaerobic layer into the primary treatment water and the primary treatment water separated by the solid / liquid separation layer to which oxygen is applied are used as the secondary treatment water. A kitchen waste treatment device comprising an aerobic layer and a drainage section for discharging secondary treated water from the aerobic layer to the outside.