KR960003926B1 - Aerobic excrement tank - Google Patents

Abstract

The septic tank (1) consists of the first settling and separation chamber (2) to settle and separate dung waste water ; the aerating chamber (3) to accelerate the biological decomposition of organics by continuously supplying air ; and the second settling chamber (4) to settle solids and remove organics by decomposition. Baffles (7) are placed to be protruded from the side part right under the inlet pipe (5) for waste water in the first settling and separation chamber (2). A separator (10) is placed between the first settling and separation chamber (2) and the aerating chamber (3).

Description

High efficiency aerobic manure septic tank

1 is a plan view of a septic tank according to the present invention,

2 is a front view of FIG. 1,

3 is a perspective view of an obstruction member installed in a sedimentation separation chamber of a septic tank according to the present invention,

4 is a perspective view of a blocking member installed in a sedimentation separation chamber of a septic tank according to the present invention,

5 is a perspective view of the cover member in the sedimentation separation chamber of the septic tank according to the present invention,

6 is a perspective view of the coupling state of the transfer pipe and the cover member in the sedimentation separation chamber of the septic tank according to the present invention.

* Explanation of symbols for main parts of the drawings

1: septic tank 2: sedimentation separation chamber

3: aeration chamber 4: final sedimentation chamber

5: inlet tube 6: outlet tube

7: obstruction member 8: blocking member

9: small room 10: partition plate

11: opening 12: transfer pipe

13: sleep 14: cover member

15 blower 16 aeration device

17: connecting passage 18: contact filter medium

19: outlet pipe 20: exhaust pipe

21: manhole cover

The present invention relates to a highly efficient aerobic manure septic tank, and more particularly to a high-efficiency aerobic manure septic tank suitable for home use using a member for preventing resuspension of solids, a device for supplying air bubbles, and a contact filter medium in the final settling chamber. will be.

As a conventional domestic septic tank, a rot tank, an im-hop septic tank, or a sprinkling-type rot tank septic tank, which is widely used in recent years, accounts for more than 98%. These septic tanks are usually composed of a sedimentation separation chamber, a filtration chamber, or an oxidizing plate, and most of the manure effluent is simply kept in the septic tank for a predetermined time to precipitate and separate the solids, and then remove the organic matter in the anaerobic state. It is a simple treatment system that discharges water. As a result, the average processing efficiency is lower than 50%. Therefore, in the existing septic tank, the average BOD of the effluent is about 190 mg / L, which does not contribute to the reduction of water pollution.

On the other hand, manure septic tank technology is the most developed field in Japan with a low sewage spread rate and a high population density, and most of the manure septic tanks recently distributed in Japan are aerobic septic tanks. Japanese aerobic septic tanks can be classified into simple binge consisting of sedimentation separation chamber, aeration chamber and final sedimentation chamber and contact aeration type filled with contact filter material in the aeration chamber. Commentary, 1984, Yasuyki Nagasawa, Structure and Performance of Activated Sludge Septic Tank, Water and Wastewater, Vol. 23, No. 1, 1981].

However, the simple aeration method consists of a sedimentation separation chamber, an aeration chamber, and a final sedimentation chamber. Since the structure is simple, no contact filter media is used. The concentration change is severe and therefore the treatment efficiency is relatively low. Operational results have been reported that the treatment efficiency is 74%. [Otis et al., On-site Household Wastewater Treatment Alternatives: Lab. and Field Studies, Water Research, Vol. 8, 1099-1113, 1974.

In the case of the contact aeration method, the processing performance is slightly higher than that of the simple aeration method. However, operation data have been reported that the actual treatment efficiency is only 65% to 72% due to the blockage of the filter material, which often causes the septic tank to operate. [Isamu Horasawa, Structure and Performance of Contact Aeration Septic Tank, Water and Wastewater, Vol. 23, No. 1, 1981].

On the other hand, in the case of Gumi, there is almost no research on aerobic manure septic tank as the sewage supply is almost complete, and instead of aeration, two pumps are installed inside the septic tank instead, forcing the circulation of sewage in the septic tank for patent treatment. There is only an example of obtaining [US Pat. No. 4,092,249 (1978)].

There have been few studies on manure septic tanks using aerobic treatment methods in Korea, and no studies on aerobic manure septic tanks using contact filter media have been conducted. Therefore, there have been no cases of patenting a manure septic tank using aerobic or aerobic contact treatment. However, the sewage treatment apparatus [Patent Publication No. 89-3922] using the contact activated sludge method by filling contact filter media in several aeration chambers was patented only, but this apparatus basically contact filter materials in several aeration chambers. It is not possible to use as a manure septic tank as a sewage treatment device as a large sewage treatment plant compared to the manure septic tank, and also in the case of the present invention there is a big difference in filling the filter medium in the top of the final sedimentation chamber. .

The present inventors have replaced the low-performance septic tank to innovatively reduce water pollution and further improve the treatment performance by further improving the existing aerobic manure septic tank, to install an obstruction member and a blocking member inside the sedimentation separation chamber. In order to prevent resuspension of solids, the sedimentation separation effect is increased, and an aerobic manure septic tank can be developed to maximize the treatment efficiency of manure sewage by installing a contact filter medium using microorganisms in the final sedimentation chamber.

Hereinafter, the present invention will be described in detail.

The present invention provides a sedimentation septic tank for treating sewage sewage, the sedimentation separation chamber for firstly sedimenting and separating the object to be treated, and continuously supplying air to the object to be treated via the sedimentation separation chamber, thereby causing organic matter to be caused by microorganisms. It is a high-efficiency aerobic manure septic tank consisting of the aeration chamber to accelerate the decomposition of and the final sedimentation chamber to precipitate the processed material through the aeration chamber as a solid second, and decomposes organic matter.

Such a present invention will be described in more detail with reference to the drawings.

1 is a plan view of an aerobic manure septic tank according to the present invention, and FIG. 2 is a front view of the aerobic manure septic tank according to the present invention. In FIG. 1 and FIG. 2, the code | symbol 1 is a septic tank, and this septic tank 1 has a sedimentation | separation chamber 2 for segregating and isolate | separating the to-be-processed matter which is the wastewater, and the sedimentation chamber 2 through this. Secondary solids are precipitated in the aeration chamber 3, which supplies air to the object to be treated to increase the decomposition of organic matter by the activity of microorganisms, and the object to be processed via the aeration chamber 3, and the organic matter is decomposed and removed. It consists of a final settling chamber (4).

Such, the capacity of the septic tank 1 according to the present invention is about 1.15m ³ based on 5 people.

In the sedimentation separation chamber 2 formed inside the septic tank 1 according to the present invention, there is an inlet pipe 5 for introducing a manure filthy water from the outside, and the inlet pipe 5 is a discharge pipe 6. ) To prevent the re-injury of the solids already deposited on the lower surface of the sedimentation separation chamber (2) while reducing the hydraulic force of the inflowed processing object in the lower portion of the discharge pipe (6). The obstruction member 7 is fixed to protrude in the central portion of the side of the sedimentation separation chamber 2.

The shape of the obstruction member 7 having such a function may be any shape as long as it can reduce the hydraulic force caused by the inflow of the object, but preferably the member having the V shape as shown in the third drawing of the accompanying drawings. It is preferable to install together the 1st and 2nd drawing of an accompanying drawing.

The lower surface of the sedimentation separation chamber 2, that is, the lower surface on which the discharge tube 6 and the obstruction member 7 are installed, is provided with the blocking member 8 fixed to the bottom surface. 8) is fixed to be in close contact with the side surface while being fixed to be in close contact with the lower surface of the septic tank 1. The shape of the blocking member 8 may be any shape as long as it can form the small chamber 9 by surrounding the discharge tube 6 and the obstruction member 7. In addition, the installation form of this interruption | blocking member 8 should just follow 1st drawing and 2nd drawing of an accompanying drawing.

As described above, the small chamber 9 formed by the installation of the blocking member 8 is repaired with the obstruction member 7 installed below the inflow pipe 5 and the manure filthy water introduced through the inflow pipe 5. By reducing the mechanical force, it is possible to prevent the solids which have already settled from being re-injured by the targets and to preferentially settle and separate the solids in the targets in the small chamber 9.

On the other hand, the sedimentation separation chamber (2) and the aeration chamber (3) according to the present invention is formed in succession in parallel as shown in FIG. 2, but divided with an opening (11) as indicated by reference numeral 10. The plate is installed between them. Through the opening 11 formed in the partition plate 10, the first processed object is supplied from the sedimentation separation chamber 2, and the sedimentation separation chamber 2 to the aeration chamber 3 is supplied. The supply of the object to be processed is carried out by a conveying tube indicated by reference numeral 12. The transfer pipe 12 is fixedly attached to the divider 10 in the longitudinal direction, and its lower end is opened.

Here, the opening in the lower end of the transfer pipe 12 is preferably placed at the position of the depth of the water surface 13, for the purpose of preventing the scum layer from passing over to the aeration chamber (3). In addition, in order to prevent the solids re-injured from the bottom of the sedimentation separation chamber (2) due to the hydraulic influence of the inflow water to be transferred to the aeration chamber (3), the cover member (14) is installed at the lower end of the transfer pipe (12). desirable. The cover member 14 is attached to the divider plate 10 while surrounding the lower end of the transfer pipe 12. In the preferred form of the cover member 14, the upper and lower ends and one side of the upper and lower sides may be opened while having the shape of the upper and lower narrow sides as shown in the fifth drawing of the accompanying drawings. The cover member 14 is preferably mounted in the same manner as in FIG. 2 of the accompanying drawings in conjunction with the transfer pipe 12 as shown in FIG.

The workpiece to be transferred from the sedimentation separation chamber 2 to the aeration chamber 3 through the transfer pipe 12 and the cover member 14 is connected to a blower 15 disposed outside the septic tank 1. Complete mixing is achieved in the aeration chamber 3 by the air bubbles continuously supplied to the lower side of the aeration tank 3 through the aeration apparatus 16. This supply of air is to increase the amount of oxygen dissolved in the water vapor in the aeration chamber 3 to increase the activity of the aerobic microorganisms so that the organic matter is well decomposed by the aerobic microorganisms in the aeration chamber 3.

In this way, the to-be-processed object processed in the aeration chamber 3 is sent to the final sedimentation chamber 4, and is processed secondarily. In the final settling chamber 4 according to the present invention, a connection passage 17 with the aeration chamber 3 is formed at the bottom thereof, and the contact filter medium 18 is enclosed at the center portion in a sealed form.

Therefore, the to-be-processed object via the aeration chamber 3 is sent to the final sedimentation chamber 4 through the connection path 17, and is settled again, and a solid component (slit) is carried out in the lower part of the final sedimentation chamber 4 by this. It is settled again, and supernatant is discharged out of the septic tank 1 through the outflow pipe 19 via the contact filter medium 18.

When the supernatant passes through the contact filter medium 18, the solids remaining in the treated water are filtered by the filter medium 18, and the organic matter in the treated water is decomposed and removed by the microorganisms attached to the filter medium 18. .

The contact filter medium 18 used in the septic tank 1 of the present invention can be used in any kind, but in particular, a vinyl chloride resin molded product or a polyethylene resin product having a high porosity and a lower specific gravity than water exhibits a good effect. . Reference numeral 20 in the present invention is an exhaust pipe for discharging the odor gas generated in the sedimentation separation chamber 2 of the manure septic tank 1 to the outside of the septic tank 1, and 21 is a manhole cover of the septic tank.

In the septic tank according to the present invention, first, an interference member and a blocking member are installed inside the sedimentation separation chamber to prevent re-injury of solid components, thereby weakening the hydraulic force of the sewage to be treated. In addition to minimizing the effects, it enhances the sedimentation and separation effect of the solid components in the influent water. Second, a certain amount of air can be continuously injected into the aeration chamber to enhance the activity of aerobic microorganisms. Third, contact filter material is installed at the top of final sedimentation chamber, so that solids contained in sewage can be easily removed by filtration. At the same time, microorganisms growing in this filter material Since organic matter can be easily decomposed, more than 85% of the pollutants finally introduced It will be going to the manure tank of high efficiency.

Hereinafter, the present invention will be described in detail by the following examples.

EXAMPLES / COMPARATIVE EXAMPLE

1. The aerobic manure septic tank according to the present invention manufactured in actual size and placed in a home and operated for about one year from May 1990 to March 1991 are shown in Table 1 below. On the other hand, as a comparative example was operated in the laboratory for three months in the United States by Otis et al., The results are shown in Table 2.

The values in Table 1 are the average values during the entire experimental period, and the influent is measured directly from the toilet at the interval of one month. The effluent is analyzed by collecting the supernatant of the final settling chamber twice a week. Value.

TABLE 1

TABLE 2

2. The sedimentation separation experiments were conducted with the interfering member, the blocking member, and the cover member inside the sedimentation separation chamber, and the sedimentation separation effect was about 50% higher than when no device was installed.

From the above results, since the average BOD removal efficiency of the manure septic tank according to the present invention is at least 85% or more, and the effluent BOD does not exceed at least 70 mg / L, of course, it satisfies the treatment efficiency of the domestic manure septic tank (removing BOD 50% or more). The treatment standard of Japanese manure septic tank (removing more than 65% of BOD, less than 90mg / L of effluent) is also satisfactory.

Claims (8)

A manure septic tank for treating manure sewage, comprising: a sedimentation separation chamber for firstly precipitating and separating an object to be treated, and continuously supplying air to the object through the sedimentation separation chamber to decompose organic matter by microorganisms. A high-efficiency aerobic manure septic tank, characterized in that made up of aeration chamber for accelerating, and the final sedimentation chamber for sedimentation of the solid matter through the aeration chamber and decomposing and removing organic matter. The manure septic tank according to claim 1, wherein an interference member protrudes from a side surface of the sedimentation separation chamber so as to protrude on the side of the inlet pipe through which the object is introduced. The manure septic tank according to claim 1 or 2, wherein in the sedimentation separation chamber, a blocking member is fixed to a lower surface of the inlet pipe through which the object is introduced to form a small chamber. The manure septic tank according to claim 1, wherein a partition plate is provided between the sedimentation separation chamber and the aeration chamber. 5. The manure septic tank according to claim 4, wherein a conveying tube having an open lower end portion for transferring the object to be processed via the sedimentation separation chamber to the aeration chamber is fixed in the longitudinal direction on one side of the partition plate. 6. The manure septic tank according to claim 5, wherein the opened lower end of the transfer pipe is positioned at a third of the water depth of the object to be treated. 7. The manure septic tank according to claim 5 or 6, wherein an open lower end of the transfer pipe is coupled with a cover member of a light beam narrowing type. The filter of claim 1, wherein the final settling chamber is in contact with a central portion thereof.