JP3408199B2 - Organic wastewater treatment apparatus and assembling method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for treating organic wastewater and a method for assembling the same, which has a simple structure and enables installation work in a short period of time.
The present invention relates to an organic sewage treatment apparatus suitable for a small sewage treatment plant and the like, and an assembling method thereof.

[0002]

2. Description of the Related Art Conventionally, organic sewage such as sewage (herein, simply referred to as "sewage") is used to separate a sieve residue from raw water and remove it from a biological treatment reaction tank installed in a sewage treatment plant. After performing necessary treatments such as nitrification and denitrification in a plurality of treatment tanks, they are discharged into a river or the like.

[0003]

By the way, the conventional organic sewage treatment facility installed in the conventional sewage treatment plant is large in size,
Basically, it is constructed at a sewage treatment plant, so specialized technology is required for installation work, and
There was a problem that the construction period was long. In particular, even in the case of a small-scale sewage treatment plant, the construction method for organic sewage treatment facilities is the same as that for medium-sized or larger sewage treatment plants, so the construction cost of the facilities will increase. There was a problem.

The present invention has a simple structure and can be installed in a short period of time in view of the problems of the conventional organic sewage treatment equipment in the above-mentioned conventional sewage treatment plant, and in particular, it is a small scale. An object of the present invention is to provide an organic sewage treatment apparatus that can be suitably used in a sewage treatment plant and the like, and an assembly method thereof.

[0005]

In order to achieve the above object, an organic wastewater treatment apparatus of the present invention is a wastewater storage tank for separating sieve residue from inflowing raw water and separately storing the wastewater and the sieve residue. And a first treatment tank having a storage tank for sieve residue and the like, and a second treatment tank having a biological treatment reaction tank consisting of an endless circulating water channel in which a membrane separation unit is arranged, and It is characterized in that the first treatment tank and the second treatment tank are connected via a waste water supply pipe.

This organic wastewater treatment apparatus is provided with a first treatment tank provided with a wastewater storage tank and a storage tank for sieve residue, which separates the inflowing raw water into wastewater and sieve residue and stores them separately. The second treatment tank, which has a biological treatment reaction tank consisting of an endless circulating water channel in which the membrane separation unit is installed, is manufactured in a factory in an external size that can be transported by land by a trailer, etc. After installing the transported first processing tank and second processing tank, the first processing tank and the second processing tank are
It can be assembled by connecting through piping.

This organic sewage treatment apparatus and its assembling method are provided with a first sewage storage tank for separating the sieve residue from the inflowing raw water and separately storing the sewage and the sieve residue, and a storage tank for the sieve residue and the like. Since the treatment tank and the second treatment tank having the biological treatment reaction tank composed of the endless circulating water channel in which the membrane separation unit is arranged are independently configured, the structure is simple and Since the 1st treatment tank and the 2nd treatment tank can be transported by land with a trailer or the like separately, the basic parts can be manufactured at the factory, and no specialized technology is required for the installation work. Can be performed in a short period of time and at low cost.

In this case, the first treatment tank and the second treatment tank are connected via a surplus sludge drawing pipe, and the surplus sludge of the biological treatment reaction tank of the second treatment tank is treated with the sieve residue of the first treatment tank or the like. It can be introduced and stored in a storage tank.

As a result, the storage and treatment of the excess sludge generated in the biological treatment reaction tank of the second treatment tank can be totally performed by the device having a simple mechanism.

Further, an aeration mechanism can be provided in the waste water storage tank and the sieve residue storage tank of the first treatment tank.

Thus, the biological treatment of the sewage introduced into the biological treatment reaction tank of the second treatment tank from the sewage storage tank of the first treatment tank can be smoothly performed, and at the same time, it is introduced into and stored in the storage tank such as sieve residue. The screen residue and excess sludge to be treated can be aerobically treated to prevent spoilage.

Further, in the biological treatment reaction tank of the second treatment tank,
A stirrer and an aeration mechanism may be provided, or a screw type aerator may be provided.

As a result, the inside of the biological treatment reaction tank consisting of the endless circulating water channel is intermittently (temporally or positionally) aerobically or anaerobically made to smoothly perform biological treatment of wastewater, that is, nitrification and denitrification. The environment such as the flow velocity of the circulating water flow for performing can be easily adjusted.

Further, by arranging and partitioning the membrane separation unit in the center of the biological treatment reaction tank of the second treatment tank, it is possible to form an endless circulating water channel.

Thus, the endless circulating water channel of the biological treatment reaction tank of the second treatment tank can be easily formed.

Further, the outlet side end of the treated water discharge pipe for discharging treated water from the membrane separation unit of the biological treatment reaction tank of the second treatment tank is set at a position lower than the water level of the biological treatment reaction tank and at the position of the open water surface. It can be immersed in a drainage adjusting tank provided with a water level adjusting means that can be adjusted arbitrarily.

As a result, the treated water can be stably discharged from the membrane separation unit of the biological treatment reaction tank of the second treatment tank without power by utilizing the head difference between the biological treatment reaction tank and the drainage adjustment tank. it can.

Further, a bypass pipe having a suction pump may be provided in parallel with a treated water discharge pipe for discharging treated water from the membrane separation unit of the biological treatment reaction tank of the second treatment tank.

As a result, the treated water can be forcibly discharged from the biological treatment reaction tank of the second treatment tank via the membrane separation unit at the start of operation of the apparatus or in other emergency.

The outer dimensions of the first and second processing baths can be formed so that the height is 3 m or less, the width is 2.5 m or less, and the length is 6 m or less.

As a result, the first processing tank and the second processing tank can be transported by land without a restriction by a trailer or the like in a separated state.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an organic sewage treatment apparatus and an assembling method thereof according to the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the organic sewage treatment apparatus of the present invention. This organic sewage treatment apparatus includes a sewage storage tank A1 that separates sieve residue from raw water flowing into a sewage treatment plant, and separately stores the sewage and the sieve residue, and a first treatment provided with a storage tank A2 such as a sieve residue. A tank A, a biological treatment reaction tank B1 composed of an endless circulating water channel in which a membrane separation unit 9 is arranged, and a water level adjusting means 12 capable of arbitrarily adjusting the positions of the open water surface
A second treatment tank B having a drainage adjusting tank B2 in which
The first treatment tank A and the second treatment tank B are arranged independently of each other and are connected to each other through the waste water supply pipe 7 and the excess sludge drawing pipe 8.

As shown in FIGS. 5 and 6, the first processing tank A and the second processing tank B are manufactured as a unit in a factory in a separated state so that they can be transported by land by a trailer T or the like. At the same time, after installing the first treatment tank A and the second treatment tank B, which were respectively transported by land to the wastewater treatment plant by the trailer T or the like, at the wastewater treatment plant, the first treatment tank A and the second treatment tank B are supplied to the wastewater. The pipe 7 and the excess sludge drawing pipe 8 are connected to each other to be assembled. The case of carrying in with this trailer is shown in FIGS. 5 and 6, but other carrying methods can be used. The outer dimensions of the first processing tank A and the second processing tank B are separated so that the first processing tank A and the second processing tank B can be transported by land by a trailer T or the like without being regulated. To have a height of 3 m or less, a width of 2.5 m or less, and a length of 6 m or less.

The first treatment tank A comprises a wastewater storage tank A1 for separately storing wastewater and sieve residue and a storage tank A2 for sieve residue etc., and the screen residue is separated by a screen 1 from the raw water flowing into the wastewater treatment plant. The wastewater is temporarily stored in the wastewater storage tank A1, and the second
The second treatment, in which the amount of sewage supplied through the sewage supply pipe 7 to the biological treatment reaction tank B1 of the treatment tub B is adjusted, and which is introduced through the screen residue separated by the screen 1 and the excess sludge drawing pipe 8. The surplus sludge from the biological treatment reaction tank B1 in the tank B is stored in the storage tank A2 such as sieve residue. The volume ratio between the waste water storage tank A1 and the sieve residue storage tank A2 is appropriately determined depending on the amount of waste water temporarily stored, the amount of generated sieve residue and the amount of excess sludge, and the like.

In the wastewater storage tank A1 and the screen residue storage tank A2 of the first treatment tank A, air diffusers 2 and 3 as an aeration mechanism are provided at the bottom of the tank, and aeration is carried out from the blower 4. To do. Thereby, the wastewater storage tank A1 of the first treatment tank A
The biological treatment of sewage introduced into the biological treatment reaction tank B1 of the second treatment tank B can be smoothly performed, and the sieve residue and excess sludge introduced and stored in the storage tank B2 for a sieve residue are aerobically treated. And prevent corruption.

Further, in the wastewater storage tank A1 of the first treatment tank A, one or two or more (two in this embodiment) flow rate adjusting pumps 5 are installed, and the flow rate adjusting pumps 5 pump water. The collected sewage is supplied to a sewage supply pipe 7 with a constant flow rate measuring tank 6 interposed.
To the biological treatment reaction tank B1 of the second treatment tank B via. In this case, sewage is supplied while controlling the constant flow rate measurement tank 6 so that the water level of the biological treatment reaction tank B1 of the second treatment tank B is kept constant and biological treatment is smoothly performed. This makes it possible to absorb fluctuations in the amount of raw water flowing into the sewage treatment plant and smoothly perform biological treatment in the biological treatment reaction tank B1 of the second treatment tank B.

Excess sludge generated in the biological treatment reaction tank B1 of the second treatment tank B is passed through a surplus sludge drawing pipe 7 equipped with a surplus sludge drawing valve 15 to store a sieve residue etc. tank A2 of the first processing tank A. To be introduced into. As a result, the second processing tank B
The excess sludge generated in the biological treatment reaction tank B1 is removed, the sludge concentration in the biological treatment reaction tank B1 is adjusted to an appropriate value, and the biological treatment can be continuously and stably performed. The excess sludge can be aerobically treated while being introduced and stored in the storage tank A2 such as sieve residue.

The second treatment tank B comprises a biological treatment reaction tank B1 consisting of an endless circulating water channel in which the membrane separation unit 9 is arranged and a water level adjusting means 12 in which the position of the open water surface can be arbitrarily adjusted. A biological treatment reaction tank B1 that is equipped with a tank B2 and is formed as an endless circulating water channel that serves as an oxidation ditch is used to perform biological treatment of the sewage introduced from the sewage storage tank A1 of the first treatment tank A. The treated water from which sludge has been removed by the membrane separation unit 9 arranged in the treatment reaction tank B1 is non-powered through the treated water discharge pipe 14 by utilizing the head difference between the biological treatment reaction tank B1 and the drainage adjustment tank B2. To be discharged into the drainage adjusting tank B2.

The biological treatment reaction tank B1 is not particularly limited, but the membrane separation unit 9 is arranged in the central portion of the biological treatment reaction tank B1, and the peripheral wall 9 on the central side of the membrane separation unit 9 is disposed.
By forming the membrane separation unit 9 so that the upper end of 1 is located on the water surface and the lower end is in contact with the bottom of the biological treatment reaction tank B1, the central portion of the biological treatment reaction tank B1 is partitioned, and The endless circulating water channel can be easily formed.

The membrane separation unit 9 has a gap 92 formed between the membrane separation unit 9 and the bottom of the biological treatment reaction tank B1.
The sewage flowing in from the sewage is filtered by membrane separation, so that the treated water without sludge is treated as a treated water discharge pipe 14
The air diffuser 10 is disposed in the gap 92 formed between the membrane separation unit 9 and the bottom of the biological treatment reaction tank B1. Then, air is blown from the blower 4 so that the membrane surface of the membrane separation unit 9 is cleaned and aerated.

The membrane separation unit 9 is constructed as a unit, and the capacity of the biological treatment reaction tank B1 and the membrane separation unit 9 are
Depending on the processing capacity and so on, one unit or two or more units (two units in this embodiment) are installed.

The treated water discharge pipe 14 for discharging the treated water filtered by the membrane separation unit 9 has its outlet end portion adjusted to a position lower than the water level of the biological treatment reaction tank B1 and the position of the open water surface arbitrarily. It is soaked in a drainage adjusting tank B2 provided with a possible water level adjusting means 12. In this embodiment, the water level adjusting means 12 has a bottomed water level adjusting tank 13 in a drainage adjusting tank B2 which is vertically movable by an arbitrary elevating mechanism (not shown). The outlet side end of the treated water discharge pipe 14 is inserted into 13 and immersed therein. In this case, the outlet side end of the treated water discharge pipe 14 is made lower than the water surface position of the biological treatment reaction tank B1, whereby the treated water filtered by the membrane separation unit 9 of the biological treatment reaction tank B1 can be treated. , The water surface position of the biological treatment reaction tank 9 and the water level adjusting tank 13 of the drainage adjusting tank B2
By using the water head difference Δh between the water surface positions, it is possible to stably discharge without power.

As the water level adjusting means 12, an arbitrary method such as a movable weir 19 can be adopted as in the organic wastewater treatment apparatus of the second embodiment of the present invention shown in FIG. When the water surface position of the drainage adjusting tank B2 is arbitrarily adjusted by the movable weir 19, when the drainage adjusting tank B2 is adjusted.
The end portion on the outlet side of the treated water discharge pipe 14 is directly inserted into and immersed in 2.

The suction pump 1 is attached to the treated water discharge pipe 14 for discharging the treated water filtered by the membrane separation unit 9.
Bypass pipes 21 with 1 interposed are arranged side by side. As a result, the treated water can be forcibly discharged from the biological treatment reaction tank B1 of the second treatment tank B via the membrane separation unit 9 at the start of operation of the apparatus or in other emergency.

Then, the treated water discharged from the drainage adjusting tank B2 is introduced into the bactericidal agent adding tank 20, and the bactericidal agent adding device 2
The necessary amount of bactericide is supplied from 0a to sterilize to a standard value, and then discharged into a river or the like. In this case, the treated water discharge pipe 14
It is also possible to connect the sterilizer addition device 14a.

Further, the inside of the biological treatment reaction tank B1 consisting of the endless circulating water channel of the second treatment tank B is intermittently (temporally or positionally) aerobically or anaerobically set to perform biological treatment of the organic wastewater, that is, , The flow velocity of the circulating water flow for smoothly performing nitrification and denitrification (for example, the flow velocity at the bottom of the biological treatment reaction tank B1: 1
In order to prepare an environment such as 0 cm / sec or more), the biological treatment reaction tank B1 is provided with a stirring / aeration mechanism. This agitation / aeration mechanism, in the organic wastewater treatment apparatus of the first embodiment shown in FIGS. 1 to 3, is an aeration pipe connected to an agitator 17 and a blower 4 arranged at the bottom of the biological treatment reaction tank B1. Although it is configured by the aeration mechanism consisting of 16, it is not limited to this, and, for example, like the organic wastewater treatment apparatus of the second embodiment shown in FIG.
It can be configured with a screw type aerator 22.

The other construction of the organic wastewater treatment apparatus of the second embodiment is the same as that of the organic wastewater treatment apparatus of the first embodiment.

[0039]

EFFECT OF THE INVENTION According to the apparatus for treating organic wastewater and the method for assembling the same of the present invention, a wastewater storage tank for separating the sieve residue from the inflowing raw water and separately storing the wastewater and the sieve residue, and the storage of the sieve residue, etc. Since the first treatment tank provided with the tank and the second treatment tank provided with the biological treatment reaction tank composed of the endless circulating water channel in which the membrane separation unit is arranged are independently configured, the structure is It is simple and can be transported by land with a trailer etc. in the state where the first treatment tank and the second treatment tank are separated, so that the basic parts can be manufactured at the factory.
The installation work does not require specialized technology, and the installation work can be performed in a short period of time and at low cost. Particularly, an organic sewage treatment apparatus and its assembling method suitable for a small sewage treatment plant are provided. Can be provided.

Further, the first treatment tank and the second treatment tank are connected via a surplus sludge drawing pipe, and the surplus sludge of the biological treatment reaction tank of the second treatment tank is stored in a sieve residue of the first treatment tank. By introducing and storing the excess sludge in the biological treatment reaction tank of the second treatment tank, it is possible to totally store and treat the excess sludge by a device having a simple mechanism.

Further, by disposing the aeration mechanism in the wastewater storage tank of the first treatment tank and the storage tank such as sieve residue, the wastewater storage tank of the first treatment tank is introduced into the biological treatment reaction tank of the second treatment tank. The biological treatment of sewage can be performed smoothly,
The screen residue and excess sludge introduced and stored in a storage tank such as screen residue can be aerobically treated to prevent spoilage.

In the biological treatment reaction tank of the second treatment tank,
By installing a stirrer and aeration mechanism, or by installing a screw type aerator, the biological treatment reaction tank consisting of endless circulating water channel is intermittently (temporally or positionally) made aerobic or anaerobic. The biological treatment of sewage, that is, the environment such as the flow velocity of the circulating water flow for smoothly performing nitrification and denitrification can be easily prepared.

Further, by arranging and partitioning the membrane separation unit in the center of the biological treatment reaction tank of the second treatment tank, the endless circulating water channel of the biological treatment reaction tank of the second treatment tank can be easily formed. be able to.

Further, the outlet side end of the treated water discharge pipe for discharging treated water from the membrane separation unit of the biological treatment reaction tank of the second treatment tank is set at a position lower than the water level of the biological treatment reaction tank and at the position of the open water surface. By immersing it in a drainage adjusting tank provided with a water level adjusting means that can be arbitrarily adjusted, treated water is discharged from the membrane separation unit of the biological processing reaction tank of the second treatment tank, and the biological treatment reaction tank and the drainage adjusting tank. It is possible to stably discharge without power using the head difference between the two.

Further, by arranging a bypass pipe interposing a suction pump in parallel with the treated water discharge pipe for discharging treated water from the membrane separation unit of the biological treatment reaction tank of the second treatment tank, at the start of operation of the apparatus, etc. In an emergency, the treated water can be forcibly discharged from the biological treatment reaction tank of the second treatment tank through the membrane separation unit.

The outer dimensions of the first processing tank and the second processing tank are formed such that the height is 3 m or less, the width is 2.5 m or less, and the length is 6 m or less. With the treatment tanks separated, they can be transported by land by trailers without restriction.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of an organic wastewater treatment apparatus of the present invention.

FIG. 2 is a front sectional view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory diagram showing a second embodiment of the organic sewage treatment apparatus of the present invention.

FIG. 5 is an explanatory diagram showing a state where the first processing tank is being transported by a trailer.

FIG. 6 is an explanatory diagram showing a state where the second processing tank is being transported by a trailer.

[Explanation of symbols]

A first treatment tank A1 wastewater storage tank A2 sieve residue storage tank B Second treatment tank B1 Biological treatment reactor B2 drainage adjustment tank T trailer 1 screen 2 Air diffuser 3 Air diffuser 4 Blower 5 Flow rate adjustment pump 6 constant flow metering tank 7 Sewage supply pipe 8 Excess sludge drawing pipe 9 Membrane separation unit 10 Air diffuser 11 Suction pump 12 Water level adjustment means 13 Water level adjustment tank 14 Treated water discharge pipe 15 Surplus sludge extraction valve 16 Air diffuser 17 Stirrer 18 screw type aerator 19 movable weir 20 Disinfectant addition tank 21 Bypass pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jiro Usui 6-1-20 Akasaka, Minato-ku, Tokyo Within the Japan Sewer Works (72) Inventor Koichi Mizuta 3-11-1 Shimozakabe, Amagasaki City, Hyogo Prefecture No. Nitto Kiden Kogyo Co., Ltd. (72) Inventor Masao Matsuoka 3-11-1 Shimosaka, Amagasaki-shi, Hyogo Prefecture Nikko Ritsudenki Co., Ltd. (72) Hideaki Hamada 3-chome Shimozaka, Amagasaki, Hyogo No. 1 within Nitto Kiden Kogyo Co., Ltd. (56) Reference JP-A-3-270791 (JP, A) JP-A-10-151484 (JP, A) JP-A-7-299485 (JP, A) JP Flat 6-490 (JP, A) JP-A-3-15697 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 3/12 C02F 3/14-3/18 C08F 3 / 34 101 C02F 3/00

Claims (10)

(57) [Claims] 1. A first treatment tank having a waste water storage tank for separating the screen residue from the inflowing raw water and separately storing the waste water and the screen residue, and a membrane separation unit. A second treatment tank provided with a biological treatment reaction tank composed of an endless circulating water channel was arranged independently, and the first treatment tank and the second treatment tank were connected via a waste water supply pipe. An organic sewage treatment apparatus characterized by the above. 2. The first treatment tank and the second treatment tank are connected via a surplus sludge drawing pipe, and the surplus sludge of the biological treatment reaction tank of the second treatment tank is a storage tank such as a sieve residue of the first treatment tank. The organic sewage treatment apparatus according to claim 1, wherein the organic sewage treatment apparatus is introduced into and stored in. 3. The apparatus for treating organic sewage according to claim 1 or 2, wherein an aeration mechanism is provided in the sewage storage tank and the sieve residue storage tank of the first treatment tank. 4. The biological treatment reaction tank of the second processing tank is provided with a stirrer and an aeration mechanism.
Or the organic sewage treatment apparatus according to 3 above. 5. The screw type aerator is provided in the biological treatment reaction tank of the second treatment tank.
Or the organic sewage treatment apparatus according to 3 above. 6. The endless circulating water channel is formed by arranging and partitioning a membrane separation unit at the center of the biological treatment reaction tank of the second treatment tank. The organic sewage treatment apparatus according to 2, 3, 4 or 5. 7. The outlet side end of the treated water discharge pipe for discharging treated water from the membrane separation unit of the biological treatment reaction tank of the second treatment tank is set at a position lower than the water level of the biological treatment reaction tank and at the position of the open water surface. 2. The apparatus is soaked in a drainage adjusting tank provided with an arbitrarily adjustable water level adjusting means.
The treatment apparatus for organic wastewater according to 2, 3, 4, 5 or 6. 8. A bypass pipe having a suction pump interposed in parallel with a treated water discharge pipe for discharging treated water from the membrane separation unit of the biological treatment reaction tank of the second treatment tank. The treatment device for organic wastewater according to 3, 4, 5, 6 or 7. 9. The outer dimensions of the first treatment tank and the second treatment tank are
The height is 3 m or less, the width is 2.5 m or less, and the length is 6 m or less.
6. The organic sewage treatment apparatus according to 6, 7, or 8. 10. A first treatment tank having a storage tank for separating the inflowing raw water into a waste water and a sieve residue and separately storing the waste water and a sieve residue, and a membrane separation unit disposed inside. The second treatment tank provided with the biological treatment reaction tank consisting of the terminal circulation water channel is manufactured in a factory in an external dimension that can be transported by land by a trailer or the like in a separated state, and the first treatment tank and the second treatment tank transported by land are used. After installing the treatment tank, the first treatment tank and the second treatment tank are connected via a pipe, and a method for assembling an organic wastewater treatment apparatus.