JPS61274798A - Apparatus for treating organic waste water - Google Patents

Abstract

PURPOSE:To easily take out formed sludge, by a method wherein a perforated intermediate partition plate having a large number of perforations and a required shape and a required dimension is provided between an upper tank and a lower tank and the lower part of anaerobic treatment and the upper part of aerobic treatment are formed in one tank and waste water is injected in the tank from the lowermost part thereof. CONSTITUTION:Waste water W containing org. waste is injected in a lower tank S1 from a supply plate 2 by a supply pipe 5. The lower tank S1 is deeply embedded in the ground and waste water is anaerobically treated in a state blocked from the open air and light. An upper tank S2 is provided to the upper part of the lower tank S1 and a large quantity of light and air are supplied to the upper tank S2 on the ground to perform aerobic treatment. A partition plate 1 is provided between the lower end of the upper tank S1 and the upper end of the lower tank S2 and pressurized blown air is supplied to the partition plate 1 from an air pump 3 through connection piping 4 to inject air bubbles. Waste water 8 is moved from the tank S1 to the tank S2, corresponding to the supply amount of waste water W to receive aerobic treatment.

Description

[Detailed description of the invention] [Technical field of industry] The present invention is an organic water treatment septic tank, in which the inside of the tank is divided into an upper part and a lower part, and organic wastewater is injected into the lower part for anaerobic treatment. Aerobic treatment is carried out in the upper part, a partition plate is placed at the boundary between the upper part and the lower part, a large number of jet holes are provided in the partition plate, and the material treated in the lower part is jetted into the upper part with air, and one tank is heated. This article relates to septic tank equipment that performs anaerobic and aerobic treatment.

[Issues with conventional technology]

In conventional organic water treatment tank systems, the conventional method is to perform anaerobic treatment in one tank and aerobic treatment in another oak. Air is then blown into the supplied wastewater through a screen for aerobic treatment. In anaerobic treatment, in the absence of oxygen, organic molecules undergo a hydrolysis reaction by enzymes (hereinafter, bacteria and similar microorganisms are collectively referred to as enzymes), and are then decomposed into soluble components in biological cells. Although undergoing redox, the final product i is less oxidized than the product from aerobic treatment. Although the enzymes for anaerobic electrode treatment and the enzymes for aerobic treatment are different types of organisms, they cannot coexist. However, decomposition due to aerobic treatment is caused by oxygen
When the oxygen is exhausted, anaerobic silica enzyme rapidly increases and anaerobic treatment is performed. Anaerobic habitats produce ammonia-methane gas, hydrogen sulfide, and hydrogen, producing malodorous and flammable gases. Despite this drawback, the advantage is that it can be carried out in deep places, there is no need for aeration, and there is no need to increase the surface volume. This cannot be achieved with aerobic treatment. The advantage of aerobic treatment is that BO
Since D is low, the coloring of the purified liquid is significantly less, and when the concentration of organic matter is low, the cost is lower than that of anaerobic treatment. Taking these disadvantages and advantages into consideration, we first perform anaerobic treatment in the deep part of one tank, and then perform aerobic treatment by aeration by jetting it to the upper part with air through a large number of small holes in the partition plate. The problem exists of providing a treatment device in which the produced sludge can be removed from the top together with the treated water. At this time, it is also a problem to decide whether to supply water to be treated to the anaerobic section and to send water to be treated including generated sludge to the aerobic section.

[Technical means to solve the problem]

In order to solve the conventional problem, the present invention provides a large number of porous intermediate partition plates with required shapes and dimensions between the upper and lower parts,
A lower part for anaerobic treatment and an upper part for aerobic treatment are formed in one tank, and M machinery wastewater to be treated is injected from the lowest part of the tank, and the wastewater passage is partitioned with a porous spout plate and supplied. The water that has been anaerobically treated in the lower part of the tank is sent to the upper part of the tank by blowing out air supplied by an air pump through the holes in the porous intermediate partition plate, and using this upward jet and flowing water due to the injection pressure of the organic wastewater to be treated. The treated liquid and generated sludge are sent from the upper part to a separator to remove the sludge.

The injection wastewater supply perforated spout plate and the intermediate perforated plate are important components.

〔Example〕

An embodiment of the present invention will be explained based on the drawings. FIG. 1 is a partially enlarged front view of an embodiment of the present invention. Second
The figure is a diagram showing the relationship between the ventilation rate and the overall oxygen transfer capacity coefficient in the aerobic treatment section. Line A is the one made by the present invention, and line B is made by the conventional method.

The treatment tank SS in FIG. 1 is particularly provided with a lower tank S1 buried below the ground surface GL, and wastewater W containing organic waste is supplied to the lower tank S1 via a supply pipe 5 to a supply plate 2 as shown in the figure. injected from. The tank wall 7 is usually cylindrical and has an inclined plate 10i attached to the upper part as shown in the figure, but it can be arbitrarily selected depending on the purpose, such as a rectangular shape. The lower tank S1 is buried deep underground and performs anaerobic treatment while blocking outside air and light, and an upper tank S2 is provided above the lower tank S1 to which a large amount of light and air is supplied from the ground surface. and aerobic treatment. A partition plate 1 is provided between the lower end of the upper tank S2 and the upper end of the lower tank 8.1, and pressurized air is blown into the partition plate 1 from an air pump 3 via a connecting pipe 4 to perform aerobic treatment in the tank S2. Air is supplied, dispersed through a large number of micropores provided in the partition plate 1, and air bubbles are ejected upward. The anaerobically treated wastewater 8 is moved together with the ejected air from the tank S1 to the tank S2 according to the amount of wastewater W supplied from the bottom, where it is aerobically treated. The lower tank S1 and the upper tank S2 are separated by a partition plate 1, whereby anaerobic processing and aerobic processing are completely separated by the partition plate, thereby increasing the image processing volume accordingly. The partition plate 1 shown in a partially enlarged sectional view in Fig. 3 is made of alumina and has a thickness of 20 mm.
ux, with a large number of holes 1 with a diameter of, for example, about 150 microns.
1 and ejects the air bubbles 13. Preferably, the diameter is smaller than the diameter of the anaerobically treated wastewater passage hole 12, and is the minimum allowable shape and size through which the slag can flow. It is also provided with a flow hole 12t for the waste water 8 having a diameter of about IU.

The volume of the treatment tank SS consisting of the upper tank S2 and the lower tank S1 is, for example, 100-, the effective aeration area ratio is about 10%, and the tank SS
The depth of the tank is, for example, 3.6 m, and the upper tank S2 and the lower tank S1 have an inner cylindrical shape with the same diameter.

When applied to treated wastewater with the same DO value and waste slag, the results shown in FIG. 2 were obtained. In other words, the relationship between the ventilation rate and the overall oxygen transfer capacity coefficient is that if the DO before treatment was 2.0, then the DO was 1 by blowing air through the intermediate plate 1.
．． 3, line A is shown in FIG. 2, and compared to conventional method B, the power efficiency of aeration pumps, etc. is improved by about 35%.

〔effect〕

In the present invention, wastewater 8 that has been anaerobically treated in a lower tank S1 buried underground in a light-shielded state is separated into thin layers by a thin partition plate 1 in one tank SS, and air is aired through the micropores of this partition plate 1. Since this was injected and aerobic treatment was performed in the upper tank S2, anaerobic treatment and aerobic treatment could be performed efficiently, and the treatment efficiency was significantly improved. The bad odor and combustible gas generated by anaerobic treatment are treated aerobically by installing an intermediate partition plate in the same tank SS, and treating the lower part of the tank and the upper part of the tank continuously, and is equipped with an intermediate partition machine. By blowing air through micropores during treatment, it is possible to increase the volume utilization efficiency of the treatment tank, increase treatment efficiency, improve efficiency per unit tank volume, and improve the transparency of treated water. In this way, the processing cost can be significantly reduced and the practical effects are significant. 4+p! I-+, b salary cut-out first--sticky dust died last year.

[Brief explanation of drawings]

FIG. 1 is a partially enlarged front sectional view for explaining one embodiment of the present invention. Figure 2 is a diagram showing the relationship between air permeability and overall oxygen transfer capacity coefficient.茅 3 troubles) M > Kiriita no Ichiban 48 Daij 1st item. SS...Treatment tank 1...Intermediate partition plate/air blowing part 2...Wastewater inlet to be treated 3...Air pump 4...Air piping 5...Wastewater supply pipe 6...Processing Water discharge gutter 7...lower tank surrounding wall 8...anaerobic treated water 9...aerobic treated water A...invention line B...conventional normal line T...treated water W...・Wastewater to be treated S1...lower tank
S2... Dobe tank 11... Air outlet 12
...Wastewater passage hole 13... Blown air bubbles patent applicant Inoue Japax Laboratory Co., Ltd.
Attorney Patent Attorney Nakanishi - 111 Figure 10-2 匍 2! ! 1 Remains 1 Ki' II 3 @' 1 Nmri 2, H Procedural Amendment June 28, 1985

Claims (1)

[Scope of Claims] 1. A wastewater treatment tank consisting of a lower tank, an upper tank, and an intermediate partition plate, in which an inlet for wastewater to be treated is provided in the lower tank, which is buried underground to block light, for anaerobic water treatment. An organic water treatment device that is installed so that wastewater that has been subjected to anaerobic water treatment in a lower tank is spouted together with air from a passage hole provided in the intermediate partition plate to an above-ground upper tank for aerobic water treatment. 2. The organic water treatment device according to claim 1, comprising an intermediate partition plate provided with air blowing holes for blowing and mixing dispersed air bubbles into the wastewater flowing through the passage holes.