JP3309465B2 - Septic tank membrane treatment device and septic tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a membrane treatment apparatus which can be directly added to a septic tank and a septic tank incorporating the membrane treatment apparatus.

[0002]

2. Description of the Related Art A wastewater treatment apparatus combining biological treatment and membrane separation treatment is disclosed in Japanese Patent Application Laid-Open No. 63-209793. This wastewater treatment apparatus temporarily stores the liquid to be treated processed by the anaerobic treatment tank in a regulating tank, and flows the liquid to be treated taken out of the regulating tank into a circulation treatment line equipped with an aerobic treatment tank and a solid-liquid separator. Processing.

[0003]

As described above, the purifying ability is greatly improved by performing the anaerobic treatment, the aerobic treatment and the solid-liquid separation treatment. It has only an anaerobic treatment chamber and a sedimentation chamber to be treated. To replace this septic tank with a septic tank capable of aerobic treatment and solid-liquid separation treatment, the equipment already installed is wasted. Further, simply connecting the aerobic treatment chamber to the solid-liquid separation treatment apparatus increases the size of the septic tank itself.

[0004]

In order to solve the above-mentioned problems, a first invention of the present application comprises a suction pipe for a liquid to be treated connected to a pump, a supply pipe for the liquid to be treated extending from the pump, and a supply pipe for the liquid to be treated. , A permeate pipe for extracting the permeate from the separation membrane, a concentrate pipe for extracting the concentrate from the separation membrane, an ejector connected to the concentrate pipe, and a diffuser connected to the ejector The apparatus constituted a film processing apparatus.

Further, as a septic tank to which the membrane treatment apparatus according to the first invention is added, a separation membrane of the membrane treatment apparatus is disposed above a septic tank main body, and a suction pipe for a liquid to be treated of the membrane treatment apparatus is provided in a precipitation chamber. Then, the permeate pipe was made to face the disinfection room, and the air diffuser was placed in the biological treatment room.

[0006]

[Act] To attaching a film processing apparatus according to the first invention septic tank, opening the access door of the septic tank, Ru placed ejector and air diffuser in the septic tank through the sight port.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall view of a membrane treatment apparatus for a septic tank according to the first invention. In this membrane treatment apparatus, a tubular separation membrane 2 and a pump 3 are disposed in a cover 1, and a liquid to be treated connected to the pump 3 is removed. A part of the suction pipe 4 is led out of the cover 1, and a supply pipe 5 for the liquid to be treated extending from the pump 3 is connected to the primary side of the separation membrane 2.

Further, a permeate pipe 6 for extracting a permeate is connected to the secondary side of the separation membrane 2, a part of the permeate pipe 6 is led out of the cover 1, and further connected to the primary side of the separation membrane 2. Is connected to a concentrate pipe 7 for taking out a concentrate. An ejector 8 held by the cover 1 is connected in the middle of the concentrated liquid pipe 7, and an air diffuser 10 is attached to a distal end of a gas-liquid introduction pipe 9 extending from the ejector 8.

FIG. 2 is a front view of a septic tank to which the above-mentioned membrane treatment apparatus is added, and FIG. 3 is a plan view of the septic tank. The septic tank is an existing one which is already buried underground or the like. A film processing apparatus is attached to the upper surface exposed on the surface of 11).

A tank main body 11 of a septic tank has a partition wall 12, 1 inside.
3, the first processing chamber S1, the second processing chamber S2, and the sedimentation chamber S3
The sedimentation chamber S3 communicates with the second processing chamber S2 at the bottom, and a disinfection chamber S4 is provided above the sedimentation chamber S3.
Then, the liquid to be treated is introduced into the first processing chamber S1 through the introduction pipe 14, and the liquid to be treated in the first processing chamber S1 is communicated with the communication path 1.
5, is sent to the second processing chamber S2, and the supernatant liquid of the precipitation chamber S3 is disinfected in the disinfection chamber S4, and then taken out through the discharge pipe 16.

Here, the septic tank before the addition of the membrane treatment apparatus is a single septic tank for treating only night soil, and the first treatment chamber S
Anaerobic treatment was performed in both the first and second processing chambers S2.

On the other hand, the septic tank to which the membrane treatment device is added is provided with an ejector 8 of the membrane treatment device and an air diffuser comprising a gas-liquid introduction pipe 9 and an air diffusion tube 10 via an inspection port 17 on the upper surface of the tank body 11. First processing chamber S1 and second processing chamber S
2, the first processing chamber S1 and the second processing chamber S2 are both changed to a chamber capable of performing aerobic processing. Note that the first processing chamber S1 and the second processing chamber S2 do not necessarily have to be aerobic processing chambers, and the amount of air introduced into the ejector 8 is eliminated, greatly reduced, or intermittently aerated. It becomes an anaerobic treatment room. In addition, the suction pipe 4 of the membrane processing apparatus faces the sedimentation chamber S3 of the septic tank,
The permeated liquid pipe 6 faces the disinfection chamber S4.

In the above, the liquid to be treated is introduced into the first processing chamber S1 through the introduction pipe 14. As the liquid to be treated, miscellaneous wastewater such as kitchen wastewater, bath, washing surface, or washing wastewater containing garbage is also introduced in addition to night soil. Here, in the first processing chamber S1, anaerobic processing is performed by reducing the intake of air into the ejector 8, and in the second processing chamber S2, the ejector 8 is discharged.
The aerobic treatment is performed by taking in air.

Then, in the liquid to be treated introduced into the first processing chamber S1, the organic matter in the liquid to be treated is first converted to acetic acid (CH ₃ COOH) or propionic acid (CH ₃ CH ₂ CO
OH) and the like, and these organic acids are further decomposed and converted into methane (CH ₄ ) or carbon dioxide (CO ₂ ) gas by methane bacteria or the like. Also, ammonia nitrogen (NH ₄ +), which is a decomposition product of nitrogen such as protein and urea, is generated.

The liquid to be treated containing the ammonia nitrogen (NH ₄ +) and undecomposed organic substances is passed through the communication passage 15 to the second liquid.
It is sent to the processing chamber S2. In the second processing chamber S2, ammonia nitrogen (NH ₄ +) is converted into nitrate nitrogen (NO) by nitrifying bacteria utilizing air (oxygen) blown through the air diffuser 10.
_3- ) and nitrite nitrogen (NO _2- ) are oxidatively decomposed, and undecomposed organic matter is oxidatively decomposed by a biofilm, which is an aggregate of aerobic bacteria. Part of the treated water containing nitrate nitrogen (NO ₃ −) or nitrite nitrogen (NO ₂ −) passes through the suction pipe 4 and the separation membrane 2 together with the concentrate and the concentrate pipe 7, the gas-liquid introduction pipe Then, the process returns to the first processing chamber S1 via 9 and is denitrified by denitrifying bacteria or the like. The treated water after the aerobic treatment flows into the precipitation chamber 3 and is supplied to the separation membrane 2 via the suction pipe 4, and the permeate is discharged from the permeate pipe 6 via the disinfection chamber S 4.

In the septic tank according to the first invention, the liquid to be treated taken out of the second processing chamber S2 is concentrated and returned to the processing chamber.

[0017]

As described above, the membrane treatment apparatus for a septic tank according to the present invention can be added to an existing single septic tank without any change, and is extremely economical. In addition, the septic tank to which the septic tank membrane treatment device according to the present invention is added can perform aerobic treatment and membrane separation treatment, so that kitchen wastewater including not only human waste but also kitchen garbage, a bath, a washing surface, or a washing wastewater is used. Can be treated at the same time, so that the purification ability is greatly improved.

[Brief description of the drawings]

FIG. 1 is an overall view of a septic tank membrane treatment apparatus according to a first invention.

FIG. 2 is a front view of a septic tank to which a septic tank membrane treatment apparatus according to the first invention is added.

FIG. 3 is a plan view of the septic tank shown in FIG.

[Description of Signs] 1 ... cover, 2 ... separation membrane, 3 ... pump, 4 ... suction pipe for liquid to be treated, 5 ... supply pipe for liquid to be treated, 6 ...
Permeate pipe 7 Concentrate pipe 8 Ejector 10 Aeration tube

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Isao Miura 2-1-1, Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Totoki Kiki Co., Ltd. (56) References JP-A-4-247295 (JP, A) JP-A-4-87694 (JP, A) JP-A-4-99300 (JP, U) JP-A-4-110196 (JP, U) JP-A-4-134492 (JP, U) (Int.Cl. ⁷ , DB name) C02F 3 / 00,1 / 44

Claims (2)

(57) [Claims] 1. A suction pipe for a liquid to be treated connected to a pump, a supply pipe for the liquid to be treated extending from the pump, a separation membrane connected to a supply pipe for the liquid to be treated, and a permeate for extracting the permeate from the separation membrane. A membrane treatment apparatus for a septic tank, comprising: a pipe; a concentrate pipe for extracting a concentrate from a separation membrane; an ejector connected to the concentrate pipe; and an air diffuser connected to the ejector. 2. The separation membrane of the membrane treatment apparatus for a septic tank according to claim 1, wherein the separation membrane is disposed above the tank body, the suction pipe for the liquid to be treated of the membrane treatment apparatus is disposed in a precipitation chamber, and the permeate pipe is disposed in a disinfection chamber. And a diffuser is placed in the biological treatment chamber.
A septic tank characterized by that .