JPS5929088A - Treatment device for waste water - Google Patents

Abstract

PURPOSE:To provide a treatment device for waste water which permits simultaneous and through aerobic treatment and anaerobic treatment, by providing an air diffusion pipe in the lower part of a descending flow passage pipe for waste water to be treated and providing an ascending flow passage for waste water to be treated communicating with the bottom of the flow passage. CONSTITUTION:This treatment device for waste water has the 1st flow passage pipe 1 in which the waste water to be treated descends, the 2nd flow passage pipe 2 which communicates with the bottom of the pipe 1 and in which the waste water to be treated ascends, and an air diffusion pipe which is provided in the lower part of the pipe 1. A piping 12 is provided so as to permit the return of a part of the water discharged from a deaeration tank 5 to the pipe 1. The part of the pipe 1 upper than the pipe 3 is made anerobic and an anaerobic treatment can be accomplished in said part in the above-mentioned constitution. A large amt. of air is diffused from the pipe 3 to increase the concn. of O2 in the pipe 2 and to permit a through aerobic treatment. This method has high cleaning up power and is particularly suited for removing nitrogen.

Description

[Detailed description of the invention] Regarding the processing device used.

Wastewater treatment using activated sludge includes aerobic treatment and anaerobic treatment. Each of these uses activated sludge containing aerobic and anaerobic bacterial species, and the pollutants to be treated are also different. Wastewater contains various pollutants, and if aerobic treatment and anaerobic treatment are used together, the purification cost will increase accordingly. For example, the desired elements contained in wastewater can be removed as four elemental gases by using both aerobic treatment and anaerobic treatment.

In order to carry out such aerobic treatment sufficiently, the oxygen required to maintain a high concentration of aerobic microorganisms and the oxygen required to make pollutants resistant (for example, ammonia Q, NH4++ 202-, NO+3+ 2 H4- +
It is oxidized (nitrified) like H20. ).

Conventionally, there are two types of devices for aerobic treatment: a bunori-bond type and an exploration type.

The Ai1 type is aerated in a shallow chemical tank.

The shallower the water, the lower the solubility of oxygen, making it unsuitable for nitrifying ammonia.

The back has a deep descending flow channel and an upper row/flow connected to the bottom of it.
(1) The water is deep and the oxygen melt angle is high.
Since the dust is high, it is suitable for ammonia oxidation.

1+] i East's deep tank type processing equipment -fa11 is shown in FIG.

FIG. 1 is a block diagram of the first flow pipe, in which the water to be treated descends from the bottom of the flow pipe J and the bottom of the flow pipe J.
f+1. and a second flow pipe 2 through which the water to be treated rises.

and a diffuser pipe 3 provided at the upper part of the first flow pipe 1.

It is structured as +. In the figure, 4 is -\ throat tank, 5 is a deaeration tank, 6 is a sedimentation tank, 7 is air l for starting operation, I
(Supply nostle, 8 is a blower, and 11 to 11 are piping.

In this conventional device, untreated wastewater is co-supplied from the pipe 9 and return sludge is co-fed from the pipe 0 to the first flow pipe. The wastewater and sludge fall through the flow pipe 1, and after being supplied with air through the aeration pipe 3, they enter the bottom of the second flow pipe 2 and rise through the flow pipe 2. The treated water enters the head tank 4. Part of the treated water introduced into the head tank 4 is
The liquid is returned to the flow path tube, where it is image processed and further purified. The remaining part is introduced into the oxygen supply tank 5, where it is rated and aerated, and then the sludge is separated in the yJ tank 6.

During such f+1 storage, the entire apparatus is aerobic due to its high oxygen dissolving ability.

In other words, the dissolved resistance of the water to be treated in this device, the concentration IW, is the second
The distribution is shown in Figure A, and no anaerobic treatment is performed. Air from diffuser pipe j3 (if the supply amount is reduced, ・J
lt temperamental part t'', because the cow +<4'y2 oxygen supply chamber of the whole apparatus decreases as shown in Figure B.

Conversely, aerobic treatment becomes insufficient. Therefore, it has not been possible to sufficiently perform aerobic treatment and anaerobic treatment at the same time.

It is an object of the present invention to overcome the problems of this conventional technology and to provide a wastewater treatment apparatus that can sufficiently perform aerobic treatment and anaerobic treatment at the same time.

The present invention achieves the above-mentioned object by means of a device provided at the lower part of the entire tracheal tube of the septic tube, and includes a first one-way tube through which the wastewater to be treated descends, A second stream connected to the remaining part of the flow pipe (width) through which the wastewater to be treated rises, a flow pipe, and an air diffuser/casing provided at the lower part of the first flow pipe;
This is a wastewater treatment device with

Hereinafter, a practical example of the present invention will be explained based on the drawings.

Fig. 3 is a block diagram thereof, in which one aeration pipe 3 is provided at the lower part of the first flow path pipe.

Piping 12 is provided so that a portion of the water discharged from the first deaeration tank 9 is returned to the first flow pipe.

In this way (1), the air diffuser pipe 3 of the 10th flow path pipe
The upper part becomes anaerobic and anaerobic treatment can be carried out in this part. A large amount of air is diffused from the first aeration pipe 3 in the trench to increase the oxygen concentration in the second channel pipe, thereby making it possible to perform sufficient aerobic treatment. -1911 of this dissolved oxygen concentration distribution is shown in FIG.

After some of the water to be treated leaves the dehydration tank 5, it is sloped from the piping 12 to the first and second flow pipes.
2, and the purification ability improves. Regarding the 4 elements in the cargo, the material that has been oxidized in the second flow pipe 1 is anaerobically treated in the first flow pipe 1 and treated with nitrogen.
2. It can be separated into dregs in the deaeration tank 8, and the removal rate is significantly improved.

In the present invention, the number of first and twentieth flow pipes to be installed is not limited, and may be any number depending on the properties of the wastewater.

FIGS. 5 and 6 show an embodiment in which two first and 20th channel pipes and two deaeration tanks are provided. No. 5
The figure is a bottom view thereof, and FIG. 6 is a longitudinal sectional view taken along line 4--■ in FIG. 5.

In FIGS. 5 and 6, the first flow pipe LA.

IB, the second flow path pipes 2A and 2B are composed of a cylindrical case 20 and a partition plate 2].

In this embodiment, the wastewater supplied from the pipe 9A flows along the Kai F plate 23 together with the sludge returned from the settling tank and supplied from the pipe 10A.

The first flow passes through the hole 24A by 11T1, enters the flow pipe IA, and flows through the flow pipe] A. Then, this pipe goes up through 2 people and enters the deaeration tank, 5A.A part of it is connected to pipe 22.
IJl is taken out from A and introduced into a sedimentation tank (not shown).

The remainder flows in the direction of hole 24B and is pipe 9B.

From 10I3 to 11 (the supplied wastewater and dirt pass through the hole 2413 with the water and descend into the flow path pipe IB).

On the way, 11 female trachea + 3 After 1 co-supply of air from B, 2nd
-1- in the flow path pipe 2B and enters the deaeration tank 5B. A portion is sent from piping 2213 to a settling tank (not shown). The remainder flows in the direction of hole>44A, and descends into the first flow pipe JA again along with the wastewater and sludge supplied from the pipes 9A and IOA.

In addition, in the deaeration tank shown in FIGS. 5 and 6, deaeration is performed by a machine (for reasons not shown).

In this way, the flow circulates through the flow pipes A to 2A to IB to 2B, is anaerobically treated in the first flow pipes IA and IB, and is subjected to θ aerobic treatment in the second flow pipes 2A and 2B. The place is caped. Furthermore, N2 generated in deaeration tanks 5A and 5t3, (
jJ2 etc. are removed, and the wastewater is sufficiently purified.

As described in detail above, the apparatus of the present invention can perform aerobic treatment and anaerobic treatment simultaneously and sufficiently, has a high purification ability, and is particularly suitable for removing desirable elements.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional device. Fig. 2 is a diagram showing an example of external dissolved oxygen concentration in the apparatus shown in Fig. 3, Fig. 3 is a block diagram showing an embodiment of the present invention, and Fig. 4 is a diagram showing dissolved oxygen +lJA in the apparatus shown in Fig. 3.
FIG. 5 is a plan view of another embodiment, and FIG. 6 is a longitudinal cross-sectional view taken along the line ■-■ in FIG. 5. 1. 1. A, IB ・First flow pipe 2
, 2 A, 2 B ・No.: 2nd channel pipe 3, 3
A, varnish B-fi & trachea 5 deaeration tank 6 sink and general pond. (Figure 1, Figure 2, 453 Figure 3, Figure 4)! Every time

Claims (1)

[Scope of Claims] (1) A first flow pipe through which the wastewater to be treated descends, and a second flow pipe through which the wastewater to be treated ascends, communicating with one end of the first flow pipe.
A wastewater treatment device comprising a flow pipe and an aeration pipe provided at a lower portion of the first flow pipe. (2) The flow path pipe of the first one and the second one of the first one? Claim 1, n, each having two or more electric circuit pipes
1. Wastewater treatment ■ [P equipment. (3) The wastewater treatment apparatus according to claim 1 or 2, which has a deaeration tank communicating with the upper part of the second flow pipe. (1) A wastewater treatment device for the r1U2 war in claim 3, which has piping that sends a part of the υ1 discharged water from the degassing tank to the front and to the second part of the flow pipe of the battery container 1.