JPH06142667A - Circulation type sewage purifying device - Google Patents

Abstract

PURPOSE:To provide the circulation type sewage purifying device of a compact constitution, which can display a sufficient purification treatment capacity in conformity with a degree of sewage without executing a design change of the whole purifying equipment. CONSTITUTION:The circulation type sewage purifying device is provided with a housing 12 installed in a water tank 14 by dipping a part thereof into the water. In the inside of this housing 12, a contact material 24 allowing a microorganism to adhere to the surface and increasing it, and a diffuser tube 30 for exhausting compressed air as small foam are disposed. In such a state, when the diffuser tube 30 exhausts foam, sewage in the water tank 14 flows into the housing from an inflow port 16, passes through the vicinity of the contact material, and thereafter, an ascending water flow which flows out of an outflow port 18 is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage purification apparatus, and more particularly to a circulation type sewage purification apparatus suitable for purifying sewage in a water tank by utilizing microorganisms.

[0002]

2. Description of the Related Art Conventionally, there have been proposed various sewage purification devices ranging from a simple one in which sewage is simply passed through a filter to be filtered to a complicated and large sized one using an activated sludge method.

[0003]

However, all of the conventional sewage purification devices have many disadvantages and are not suitable for raising fish.

[0004] For example, an apparatus utilizing the activated sludge method is designed in advance according to a predetermined pollution degree, and therefore, when the pollution degree in the water tank exceeds the initial set value, the purification treatment capacity is extremely lowered, In order to exert sufficient purification treatment capacity, it was necessary to change the design and remodel the entire device. Further, in this apparatus, the microorganisms grown in the water tank collide with each other, or decompose the organic matter dissolved in the sewage to become dead bodies and float in large quantities. However, the carcasses of the floating microorganisms adhered to the gills of the fish and made the fish difficult to breathe, which hindered breeding.

On the other hand, a device that only allows filthy water to pass through the filtration device can remove floating contaminants in the water, but does not have the ability to decompose the organic matter dissolved in the filthy water.
The filter material used is clogged by the removed foreign matters and must be replaced each time, which is disadvantageous. Further, when the filter medium begins to be clogged, anaerobic bacteria proliferate, and when these bacteria decompose organic matter, methane gas and organic acids that adversely affect fish breeding are generated.

An object of the present invention is to provide a circulating type wastewater purification device having a compact structure which can respond to the degree of pollution of wastewater and exert sufficient purification capacity without changing the design of the entire purification facility. To do.

[0007]

In order to achieve the above-mentioned object, the present invention provides a housing which is detachably mountable in a water tank and has an inlet at a lower portion and an outlet at an upper portion. A bubble ejecting means that is internally provided in the lower portion and ejects bubbles into the housing, and is disposed inside the housing and above the bubble ejecting means,
A circulatory wastewater purification device comprising a microorganism multiplication means for adhering and proliferating microorganisms on the surface to purify sewage, so that when the bubble squirting means squirts bubbles, a rising water flow is generated from the inlet to the outlet in the housing. I will provide a.

[0008]

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

The circulating type waste water purifying apparatus 10 of the present invention is shown in FIG.
As shown in FIG. 3, a vertically long casing 12 having a flat shape as a whole is provided. As shown in FIG. 2, the housing 12 is installed in the water tank 14 so that a part thereof is exposed above the water surface and the other part is immersed in water. An inflow port 16 is formed in the lower part of the housing 12, and an outflow port 18 is formed in the upper part thereof. On the other hand, the inclined plate 2 is provided on the top of the housing.
0 is attached, and this inclined plate 20 serves as a guide plate for guiding the rising water flow in the housing 12 obliquely downward from the outlet 18. In the illustrated embodiment, the housing 12 can be fixed to the wall surface of the water tank 14 by a plurality of suction cups 22 attached to the back surface thereof.

As shown in FIGS. 2 and 3, a plurality of contact materials 24 for adhering and proliferating microorganisms are horizontally provided inside the housing 12 at predetermined intervals and at each end. Is fixed to the inner surface of the housing. This contact material 24 is, for example,
As shown in Japanese Examined Patent Publication No. 56-28199, the core material 26
And a large number of annular yarns 28 protruding radially from the core member 26, good results are obtained.

Further, an air diffuser 30 is provided in the vicinity of the bottom of the housing 12 (that is, below the contact material), and the air diffuser 3 is provided.
Bubbles are ejected into the housing 12 from a large number of small holes (not shown) formed in the peripheral surface of the No. 0. One end of the air diffuser 30 is closed, and the other end is connected to a compressed air supply pipe 32.
The compressed air supply pipe 32 extends upward substantially vertically inside the housing 12, and its upper end extends upward from the top of the housing 12. The upper end of the compressed air supply pipe 32 is connected to an air compressor 36 via a vinyl tube 34 as shown in FIG. 3, whereby the air pressure-fed from the air compressor 30 is compressed air supply pipe 32. To reach the air diffusing tube 30 and are ejected into the housing 12 in the form of small bubbles from a large number of small holes formed in the air diffusing tube 30.

When the air diffuser 30 ejects air bubbles, the casing 12
Since the inner pressure is lower than the outer pressure, the dirty water in the water tank 14 flows into the housing 12 through the inflow port 18. The inflowing sewage passes through the vicinity of the contact material 24 and then flows out of the housing from the outflow outlet 18. That is, when bubbles are ejected, a rising water flow is generated in the housing 12 from the inflow port 16 to the outflow port 18 side.
Since this rising water flow becomes a jet flow and is jetted up, it is sufficiently agitated, and at that time, the organic substances and the like dissolved in the water are brought into contact with the contact material 2.
It is decomposed by the action of the microorganisms attached to 4. At this time, since a large number of bubbles are mixed with water and stirred, a large amount of oxygen dissolves in the water. When a large amount of oxygen dissolves in the water, many aerobic bacteria are generated, which is convenient for the decomposition of organic matter (when aerobic bacteria decompose organic matter, carbon dioxide and water are generated).

On the surface of the contact material 24, the Japanese Patent Publication No.
As described in JP-A-28199, many types of microorganisms proliferate and coexist without separation and separation of sludge, and excess sludge does not occur. It never happens.

In the illustrated embodiment, the ascending water flow is jetted up and blows up, but this jet flow is discharged obliquely downward from the outflow port 18 by the inclined plate 20 at the top of the housing 12, and is scattered outside the water tank 14. There is nothing to do.

In the illustrated embodiment, the sucker suitable for fixing the circulating type waste water purifying apparatus to the water tank is a sucker suitable for fixing to a small water tank, but a known fixing means such as a suspension fixing mechanism is adopted. can do. For example, if the device is relatively small and the force of the upward jet flow that flows upward in the housing 12 is not so strong, if a weight is attached to the device so that its own weight is sufficiently large, then the device itself is It is also possible to fix to the bottom of the aquarium. However, in that case, it is necessary to calculate the necessary own weight in consideration of the fact that the buoyancy corresponding to the amount of small bubbles in the housing 12 acts on the housing 12.

The circulation type sewage purification apparatus of the present invention can be applied not only to a water tank for raising fish but also to a water tank such as a purification tank for the purpose of treating sewage.

[0017]

EFFECTS OF THE INVENTION The circulating purification apparatus of the present invention can easily cope with a change in the initial amount of purification treatment by appropriately increasing or decreasing the number of units installed in the water tank. Therefore, there is no need to change the design or modify the entire purification equipment.
In addition, it has a compact structure in which all the necessary components are contained in the housing, so it is easy to install and remove in the water tank.
Does not require much effort.

[Brief description of drawings]

FIG. 1 is a perspective view of a circulation type wastewater purification device according to a preferred embodiment of the present invention.

FIG. 2 is a side sectional view showing a state in which the circulation type waste water purifying apparatus of FIG. 1 is installed in a water tank.

FIG. 3 is a front view of the circulation type wastewater purification device of FIG. 1 with a front plate removed to show an internal structure.

FIG. 4 is a view showing an example of a contact material used in the circulation type waste water purification device of FIG. 1.

5 is a view of the contact member shown in FIG. 4, taken along the line VV.

[Explanation of symbols]

 10 Circulation Type Sewage Purifier 12 Housing 14 Water Tank 16 Inlet 18 Outlet 20 Sloping Plate 22 Sucker 24 Contact Material 30 Diffuser Pipe 32 Compressed Air Supply Pipe 36 Air Compressor

Claims (5)

[Claims] 1. A circulation type wastewater purification device, which is detachably mountable in a water tank and has an inlet port at a lower portion,
A casing having an outlet in an upper portion, a bubble ejecting unit that is internally provided in a lower portion of the casing and ejects bubbles into the casing, and is disposed inside the casing and above the bubble ejecting unit, And a microorganism multiplying unit for purifying sewage by adhering and growing microorganisms on the surface, and a circulation in which a rising water flow is generated from the inflow port to the outflow port side in the housing when the bubble ejection unit ejects bubbles. Type sewage purification device. 2. The housing has an inclined plate near the outlet, and the rising water flow flowing from the inlet toward the outlet is guided obliquely downward from the outlet by the inclined plate. The circulating wastewater purifier according to claim 1. 3. The housing according to claim 1, wherein the housing has a fixing means, and can be fixed to the wall surface of the water tank by the fixing means.
The circulating sewage purification device described in. 4. The microbial growth means comprises a plurality of contact materials, each of the contact materials comprising a core material and a large number of annular threads protruding radially from the core material. The circulating type wastewater purifying apparatus according to claim 1, wherein the circulating type wastewater purifying apparatus is wound in a spiral shape and is vertically provided on the housing with a predetermined distance therebetween. 5. The circulation type wastewater purification device according to claim 1, wherein the bubble jetting means includes an air diffuser having a large number of small holes.