JPH07328676A - Contact aeration module unit - Google Patents

Abstract

PURPOSE:To prevent the thickening and stripping of microorganisms by unitizing a biological contact filter medium to be packed in an aeration tank for biologically treating waste water and to aerate the entire surface by improving the turning flow. CONSTITUTION:A succession of modules 3 are provided in a unit, a series of braided filter mediums are freely detachably provided to each module, and an appropriate number of diffuser pipes 4 are arranged away from the bottom of the module 3. A partition plate 2 is furnished to a couple of opposite side faces of the unit to separate the inside and outside of the unit on the side faces, and an opening 5 for passing a turning flow is provided under each partition plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus for purifying wastewater such as industrial wastewater and domestic wastewater by the catalytic oxidation action of aerobic microorganisms, and in particular, a biological contact filter material inserted into an aeration tank, which is the main part of the apparatus. Aeration module as
Concerning the unit.

[0002]

2. Description of the Related Art Conventionally, in this type of water treatment apparatus, microorganisms which are activated sludge are attached to a biological contact filter medium in an aeration tank, and aeration is performed from an air diffuser by an air pipe to multiply the microorganisms and enhance a purification function. Is being pursued. However, in the conventional structure, these contact filter media, the air pipes including the air diffuser, the pedestal, etc. are of a stationary type and are assembled, installed, and attached on site, so that the problems described below occur. there were.

[0003]

That is, since it is constructed by on-site work, the construction period is heavy, and since the pedestal and the like are fixed in the tank, replacement and repair are large.
Therefore, there is a problem that it requires a considerable number of working days and is costly. Furthermore, in many cases, one-sided aeration was performed by a unidirectional swirling flow in the tank, so a backwash device was required to prevent the growth of microorganisms adhering to the filter medium, and the backwash device was placed near and away from the air diffuser. The swirling flow is deviated to one side from the end, and the separated sludge accumulates at the bottom of the tank, resulting in a decrease in treated water quality.

An object of the present invention is to solve the above-mentioned problems of the prior art, and therefore, it is possible to greatly shorten the on-site work by unitizing the biological contact filter medium including the air diffuser. Further, it is to provide a contact aeration module unit capable of preventing microbial enlargement by aeration of the entire surface, and thus preventing separation of sludge.

[0005]

In order to achieve the above object, a contact aeration module unit according to the present invention is installed in an aeration tank for biological treatment of wastewater, and comprises a series of juxtaposed modules. -A module 3, a partition plate 2 attached to a pair of opposing side surfaces, and an opening 5 provided under each partition plate, and each module is provided between support members 13, 14 arranged vertically. A series of attached filter media 11 and a suitable number of air diffusers 4 spaced beneath the module and a common tube 6 mounted in communication with each air diffuser. Air introduction pipe 7 communicating with a common pipe
It is characterized by including.

In a further preferred form, the common tube 6
Has a feature that it is arranged at the right angle in the center of each air diffusing tube 4 and the air introducing tube 7 is vertically attached to approximately the center of the common tube.

Another preferred form is characterized in that hanging portions 9 are provided on the four corners of the module unit to facilitate lifting and moving of the module unit 1.

In another preferred embodiment, the upper and lower support members 13 and 14 of the string-shaped filter medium 11 are inserted into the guide rails 16 having channel members at both ends thereof, and between the end portions of the support members adjacent to each other. The spacer 17 is movably inserted into the guide rail.

[0009]

Since the device of the present invention is constructed as a unit including a series of modules 3 consisting of a string-like filter medium, an air diffusing pipe 4 and an air introducing pipe 7, the construction of the aeration tank containing the biological contact filter medium becomes extremely easy. . Further, an appropriate number of air diffusers are installed under each module and the partition plate 2 is installed to generate an ascending flow inside the unit and descend outside the unit to perform aeration on the entire surface.

If a common pipe 6 connected to the air introducing pipe is arranged at the center of each air diffusing pipe 4, the air is dispersed evenly over the entire surface, and the microbial purification function is well performed over the entire unit. .

Further, if the hanging portions 9 are provided on the upper portions of the four corners of the unit 1, the unit can be appropriately moved by the wire, and the work of installing, removing, and exchanging the unit is further facilitated. .

If both ends of the member for supporting the string-shaped filter medium 11 are inserted into the guide rails 16 and are held at appropriate intervals by the spacers 17, the mounting and dismounting of the respective modules 3 can be facilitated, and thus the modules 3 can be easily attached and detached. The replacement and repair can be easily performed.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows an example of a contact aeration module unit according to the present invention as a whole. The unit 1 has a rectangular parallelepiped shape, and partition plates 2 and 2 attached to a pair of opposite side surfaces thereof. It is composed of a series of modules 3, which are elements of the biological contact filter medium, an appropriate number of air diffusers 4 provided under the modules, and a piping system for supplying air to the air diffusers. The lower end of each partition plate 2 is separated from the bottom surface of the unit, so that an opening 5 is formed below the partition plate 2.

As shown in FIGS. 2 and 3, a common pipe 6 is fixed at the same level as the air diffusing pipe 4, and each air diffusing pipe 4 is attached in communication with this common pipe. An air introducing pipe 7, which is preferably a rising pipe, is attached to the common pipe 6, and the air introducing pipe 7 is preferably connected to an air pipe through a flexible tube 8 in order to widen an allowable range in connection. Air is supplied to each air diffuser through the air introducing pipe 7 and the common pipe 6, and aeration is performed by a large number of vent holes of each air diffuser.

Each diffusing tube 4 is arranged parallel to either side of the unit, and preferably a common tube 6 is installed at a right angle in the center of each diffusing tube, or is of the same length on both sides of the common tube. The air diffusers 4 are arranged symmetrically and at right angles. Also,
The air introduction pipe 7 is preferably mounted vertically at approximately the center of the common pipe 6. By arranging the common tube in the center of the diffuser tube group as described above, uniform aeration can be achieved.

A plurality of module units 1 are arranged in the tank body 10 of the aeration tank, and in the illustrated example, four unit 1 are inserted as shown in FIG. The series of modules 3 in each unit are usually placed parallel to each other at a constant pitch, and the diffuser tubes 4 below the modules 3 are also preferably placed parallel to each other as shown. It In many cases, the series of modules 3 and the series of diffusers 4 are arranged at right angles to each other. As shown in FIGS. 4 and 5, a gap having an appropriate size is provided between the side surface of each unit 1 and the peripheral wall of the tank 10, and the gap is used as a circulation flow passage as described below. .

As shown in FIG. 1, the module unit 1 is preferably provided with hanging portions 9 at the upper portions of the four corners by suitable frame members or mounting plates, and the wires are locked to the hanging portions. By doing so, there is an advantage that the unit 1 can be lifted by a crane or the like and the movement thereof becomes easy.

As shown in FIGS. 2 and 6, each module 3 is a series of string-like filter media 1 mounted at a constant pitch.
1, each string-shaped filter medium is vertically stretched, and both upper and lower ends thereof are attached to a flexible tubular member 12, and a supporting member 13, which is a long object penetrating the member 12, Supported by 14. Each support member is composed of a rod or a pipe material.
FIG. 6 illustrates the support structure of the upper end of the string-shaped filter medium 11,
Although its lower end is not shown, the lower end is likewise attached to and supported by the support member 14 via the tubular member 12.

The support members 13 and 14 of the string-shaped filter medium 11 are attached between a pair of opposing side portions of the unit 1 by a suitable attachment member. In a preferred form, as shown in FIG. 6, both ends of each support member 13 are inserted into guide rails 16 fixed to the side portions of the unit, and a spacer 17 is movably inserted into the guide rails. Installed. The guide rail 16 is preferably composed of a channel material such as lip groove type steel, and the spacer 17 is preferably a short tube.

The support member 13 is attached to the guide rail 16 and the spacer.
In the case of fixing with the supporter 17, both ends of the support member 13 are inserted into the guide rails 16 and the spacers 17 are inserted between the end portions of the support members adjacent to each other, so that the end portions of the support members are inserted into the guide rails. And spacers are inserted alternately and packed together with no gaps, and both ends of the guide rail 16 are bolts 18
The series of modules 3 is fixed at a constant pitch by being tightened by.

As shown in FIG. 7, when the spacer 17 is composed of a short tube, the outer diameter of the spacer 17 is the guide rail 16.
The width dimension of the groove portion 16a facing the inside of the guide rail 16 is larger than that of the guide rail 16. Therefore, each spacer is inserted from the end portion of the guide rail 16, but the spacer 17 is inserted into the groove portion 1 of the guide rail.
There is an advantage that it cannot fall off from 6a.

This module unit 1 is manufactured in a factory and then transported to an aeration tank at the site. For on-site construction, it is sufficient to install the unit in the tank 10 and connect the air pipe, which is more than conventional. On-site work is significantly reduced. Further, since each unit 1 can be easily moved even after installation, maintenance and replacement can be easily performed.

When this unit 1 is installed in a tank and operated as a wastewater treatment apparatus, as shown in FIG. 2, the air sent from the air source is passed through the air introduction pipe 7 and the common pipe 6 to each diffuser pipe. 4 and is discharged into the raw water (waste water) in the tank through the holes of each air diffusing pipe, and aeration is performed to oxygenate the microorganisms and stir the raw water. The water flow due to this aeration causes an ascending flow inside the unit that is the resistance portion where the string-shaped filter medium 11 is present, passes over the partition plate 2, and descends through a space with little resistance that is a gap between the tank wall and the outside of the partition plate. Then, a circulating flow that enters the unit again through the opening 5 is generated, and aeration is performed on the entire surface.

In this module unit, an appropriate space is provided between the series of modules 3 and the series of air diffusing tubes 4 thereunder, and the space serves as an aeration space, and a string is also provided. Since the air is uniformly supplied to the filter medium 11,
It is possible to increase the filling factor of the filter medium, thereby improving the processing efficiency. Further, by minimizing the opening 5 under the partition plate 2 and increasing the flow velocity of the circulation flow, the separated sludge does not accumulate at the bottom, and an efficient swirling flow is generated. Further, since there is almost no interference with the side surface of the tank, it is not affected by the error of the concrete-made tank wall.

It is preferable to use a cord-like filter medium 11 having a large contact area and not clogged with sludge. In one example, a polyester fiber having a fiber diameter of 1000 denier and a diameter of 30 microns is used and the entire width is 10 cm. A surface area of 2.6 square meters per 1 m is used.

[0026]

According to the present invention, since the biological contact filter medium is configured as a unit, the unit can be manufactured at the factory, and therefore the field work of the aeration tank can be shortened. In addition, it is possible to perform modification, replacement, repair, etc. of an existing device provided with this unit in a short period of time, for example, by using a holiday. In this unit, the circulation by aeration is performed appropriately, the aeration of the entire surface prevents the growth of microorganisms adhering to the contact material, the sludge that has been separated does not accumulate at the bottom of the tank, and the backwashing device for separating the adhered sludge Becomes unnecessary.

The common pipe connected to the air introduction pipe is arranged in the center of the series of air diffusing pipes so that the air is evenly distributed, and the aeration performed through the air diffusing pipes is performed satisfactorily throughout the unit, and the processing performance To improve.

Further, since the hanging portions are provided at the upper portions of the four corners of the unit, the unit can be more easily lifted and moved, so that the unit can be easily installed, removed, and replaced.

By inserting the end portion of the support member of each module into the guide rail and fixing it with a spacer,
Each module can be easily attached and detached.
The replacement and repair of the filter media and the string-shaped filter media are significantly facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view showing a contact aeration module unit according to an example of the present invention.

FIG. 2 is a vertical sectional view of this module unit.

3 is a cross-sectional view showing a state where the unit shown in FIG. 2 is viewed from a right angle direction.

FIG. 4 is a longitudinal sectional view of an aeration tank including this module unit.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a partial perspective view showing a state of the unit when assembled.

7 is a cross-sectional view taken along line BB of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Module unit 2 Partition plate 3 Module 4 Diffuser pipe 5 Opening 6 Common pipe 7 Air introduction pipe 9 Suspension part 11 String filter media 13 Supporting member 14 Supporting member 16 Guide rail 17 Spacer

Claims (4)

[Claims] 1. A contact aeration module unit installed in an aeration tank for biologically treating wastewater, wherein the module unit is mounted on a pair of side surfaces facing each other and a series of juxtaposed modules. A partition plate and an opening provided under each partition plate, each module having a series of string-like filter media mounted between supporting members arranged one above the other, and further comprising: A contact aeration module, comprising: an appropriate number of air diffusers provided separately below, a common tube connected to each of the air diffusers, and an air introduction tube communicating with the common tube. -Le Unit. 2. The common pipe is arranged at the center of the group of air diffusers, and the air introduction pipe is vertically attached to substantially the center of the common pipe. Contact aeration module unit. 3. The contact aeration module unit according to claim 1, wherein hanging portions are provided at upper portions of four corners of the module unit to facilitate lifting of the module unit. . 4. The upper and lower support members for supporting the string-shaped filter medium are inserted into guide rails each having both ends thereof made of a channel material, and the guide rails are provided between the end portions of the support members adjacent to each other. The contact aeration module unit according to claim 1, wherein the support member is held at a predetermined interval by inserting a spacer therein.