JPH05285485A - Sewage treatment apparatus - Google Patents

Abstract

PURPOSE:To provide a small sized sewage treatment apparatus having a simple structure and capable of being produced inexpensively. CONSTITUTION:First and second sedimentation and separation tanks 5, 6 sedimenting and separating the solid in sewage by sedimentation and separation action to digest and decompose the sedimented and separated solid by anaerobic bacteria, a contact aeration tank 7 digesting and decomposing the org. matter in sewage by aerobic bacteria propagated in a filter bed 15 formed by densely packing the tank 7 with a large number of filter materials varied in shape and generating gaps therebetween and a sedimentation tank 8 further sedimenting and separating the solid in sewage by sedimentation and separation action and having a disinfection tank 8a disinfecting sewage formed therein are formed in one treatment container 1 in this order in series.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus used for treating manure and sewage in an area where public sewers are not installed.

[0002]

2. Description of the Related Art The applicant has already proposed a sewage treatment apparatus for purifying sewage by using microorganisms as a means for treating manure and sewage in an area where public sewers are not installed (Japanese Patent Application No. 2- 183244). This sewage treatment device is shown in FIG.
As shown in Fig. 1, the first precipitation separation tank (A), the second precipitation separation tank (B), the preliminary filtration tank (C), the first contact aeration tank (D), the second contact aeration tank (E), the precipitation tank (F) and disinfection tank (G)
The first settling separation tank (A) and the second
After the solid matter in the wastewater is precipitated and separated by the precipitation separation action in the precipitation separation tank (B) and is digested and decomposed by the anaerobic microorganisms, and subsequently, the flocs of the anaerobic microorganisms are removed in the preliminary filtration tank (C). , The first contact aeration tank (D) and the second contact aeration tank (E) digest and decompose organic matter contained in the wastewater by aerobic microorganisms, and then the precipitation tank (F) and the disinfection tank (G) The flocs of aerial microorganisms are precipitated and disinfected, and the treated water is discharged to the outside.

[0003]

However, the conventional sewage treatment apparatus described above includes the first precipitation separation tank (A), the second precipitation separation tank (B), the preliminary filtration tank (C), and the first contact aeration tank ( D),
As it consists of 7 tanks, 2nd contact aeration tank (E), settling tank (F) and disinfection tank (G), the equipment becomes large and there is a restriction on transportation to the installation site and installation / construction. This is unavoidable, and since it is necessary to divide the inside of one processing container into 7 chambers by a partition plate and in parallel, the structure becomes complicated and the number of steps for assembling is large and the work is troublesome. There is also a problem that the number of parts is increased and the cost of the entire apparatus is increased.

The present invention has been proposed in view of the above problems, and an object of the present invention is to provide a sewage treatment apparatus which is small in size and has a simple structure.

[0005]

In order to achieve the above object, the present invention uses a plurality of partition plates to form a first settling separation tank, a second settling separation tank, a contact aeration tank and a settling tank inside a single processing container. The first partitioning plate is divided in series so as to be lined up in this order, and an inflow pipe for introducing the wastewater to be treated is introduced into the first precipitation separation tank, and the partition plate partitioning from the second precipitation separation tank is provided. A flow hole with a detour plate is provided at the front and rear, and a flow rate controller for quantitatively adjusting the flow rate of the wastewater is provided on the partition plate that separates the second precipitation separation tank and the contact aeration tank from each other. In addition, a bypass plate for preventing clogging is provided in front of this flow rate regulator, and a filter bed formed by randomly packing a large number of filter media that are varied in shape and have gaps between them is provided in the contact aeration tank. , Blow air to this filter bed If necessary, aeration pipes that cause aeration are provided in two rows with a rectifying plate interposed therebetween, and a partition plate that separates from the settling tank is provided with a flow hole. Provided is a sewage treatment apparatus in which a disinfection chamber tank is formed by a baffle plate having an L-shaped cross section in a settling tank, an overflow weir and a disinfection cylinder are provided in the disinfection tank, and an outflow pipe for discharging treated sewage is provided. ..

Further, a wire is vertically movably fitted in the sewage intake pipe for taking in the sewage of the flow rate controller, and
This number line is supported by a float that floats on the surface of the wastewater stored in the second settling tank.

[0007]

The sewage treatment apparatus of the present invention is characterized in that the solid matter in sewage is precipitated and separated by the sedimentation action in the first sedimentation separation tank and the second sedimentation separation tank, and the separated solid matter is digested and decomposed by anaerobic microorganisms. Then, the aerobic microorganisms propagated on the filter bed in the contact aeration tank digest and decompose organic matter contained in the wastewater, and then the settling tank further precipitates and separates the solid matter in the wastewater by the precipitation separation action, and the disinfection tank. Disinfect with and discharge to the outside as treated water.

Further, the floating motion of the float floating on the surface of the waste water stored in the second settling tank is used to move the number line up and down to prevent clogging of the flow rate regulator.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the sewage treatment apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1, (1) is a processing container, the inside of which is composed of partition plates (2) to (4) to form a first settling separation tank (5), a second settling separation tank (6), and contact aeration. The settling tank (8) having the tank (7) and the disinfecting tank (8a) is divided in series so as to be lined up in this order.

The first settling / separating tank (5) is provided with an inlet pipe (9) for introducing sewage, with a part of the inlet pipe fixed to the side wall of the processing container (1).

At the predetermined height portion of the partition plate (2) separating the first sedimentation separation tank (5) and the second sedimentation separation tank (6), there is a flow hole ( 10) is provided, and a pair of detour plates (11) and (12) are provided to face each other at predetermined intervals in front of and behind the flow hole (10) (left and right in the drawing).

The second precipitation separation tank (6) and the contact aeration tank (7)
A flow controller (13) for maintaining a constant flow rate of the sewage is provided at a predetermined height portion of the partition plate (3) separating the space, and the front of the flow controller (13) ( In order to prevent clogging of the flow rate regulator (13) due to the inflow of suspended matter such as scum at a predetermined interval (on the left side in the figure) (the flow rate regulator (13) is removed in the device of the present invention because the preliminary filtration tank is removed). A detour plate (14) is installed to prevent the inflow of suspended solids such as scum, and to prevent this from advancing only the sewage.

The flow rate controller (13) is, as shown in FIG.
The transfer pipe (13a) fixed through the partition plate (3) and the transfer pipe (13a) at one end (left end in the figure) of the transfer pipe (13a).
a) A middle part is integrally connected to communicate with a), and a lower end has a sewage intake pipe (13c) having an inflow port (13b) into which a fixed amount of sewage flows, and an upper and lower part of the sewage intake pipe (13c). An arm (13) is movably fitted and attached to a float (13d) floating on the wastewater surface stored in the second sedimentation separation tank (6).
and a clogging prevention wire (13f) supported via e) and stored in the second settling separation tank (6) from the inlet (13b) of the wastewater intake pipe (13c). A fixed amount of the aeration tank (7) flows into the intake pipe (13c) by a fixed amount, and the wastewater is transferred from the wastewater intake pipe (13c) through the transfer pipe (13a).
It is configured to prevent clogging of the inlet port (13b) by moving the wire (13f) up and down via the arm (13e) by using the floating motion of the float (13d) while flowing in. There is. In addition, this flow regulator (1
In consideration of 3), even if a large amount of wastewater temporarily flows in, the wastewater intake pipe (13
The advection port (13
g) and the introduction pipe (13h) in the middle of the transfer pipe (13a).

In the contact aeration tank (7), a large number of filter media such as resin containers for lactic acid bacteria beverages, for example, about 10,000 are randomly packed to form gaps between them due to various shapes. Is provided with a filter bed (15), and an aeration pipe (17) connected to an air supply means such as a blower pump (not shown) is provided in a cylindrical body (16) which is fixed through the filter bed (15). An aerobic microorganism is propagated in the filter bed (15) by being inserted and aerated by the air blown by the aeration pipe (17). In the device of the present invention, in order to compensate for the reduction of the contact settling tank from the conventional two tanks to one tank, an aeration pipe (17) is arranged in the contact aeration tank (7) in parallel in the direction perpendicular to the paper surface in FIG. In the middle, a straightening vane (not shown) for preventing the water streams from colliding with each other is provided in the middle.

At the lower end of the partition plate (4) separating the contact aeration tank (7) and the sedimentation tank (8), there is a circulation hole (18) for circulating the sewage.

By providing a baffle plate (19) having an L-shaped cross-section with an upper end formed in a zigzag shape inside the settling tank (8) by fixing a part of it to the side wall of the processing container (1). The disinfection tank (8a) is formed in the settling tank (8), the overflow weir (20) and the disinfection cylinder (21) are provided in the disinfection tank (8a), and the treated wastewater is discharged to flow out. A part of the pipe (22) is fixed through the side wall of the processing container (1).

In the figure, (23), (24) and (25) are manholes provided in the upper part of the processing container (1).

Next, the operation of the sewage treatment apparatus of the present invention having the above structure will be described.

First, in the wastewater that has flowed into the first settling / separating tank (5) from the inflow pipe (9), the solid matter in the wastewater is precipitated and separated by the settling and separating action, and the separated and separated solid matter is Is digested and decomposed by anaerobic microorganisms that propagated in anoxic condition.

Thus, the sewage obtained by precipitating and separating the solid matter in the first settling / separating tank (5) and digesting and decomposing it by the anaerobic microorganisms is disposed below the diversion plate (11) and in the distribution hole (2) of the partition plate (2). 10) and under the detour plate (12), it is admitted into the second precipitation separation tank (6), where the solid matter is precipitated and separated and digested and decomposed by the anaerobic microorganisms over a longer period of time.

Subsequently, the sewage water in which the solid matter is precipitated and separated in the second precipitation / separation tank (6) and digested and decomposed by the anaerobic microorganisms is disposed below the clogging prevention bypass plate (14) and the flow rate adjuster (13). ) And advection into the contact aeration tank (7), where it passes through the filter bed (15), whereby two aeration pipes (17) are provided in parallel in the direction perpendicular to the paper surface in FIG. ), The organic matter contained in the wastewater is digested and decomposed by the aerobic microorganisms propagated by the aeration by the air blown by. At this time, since the filter bed (15) is formed by randomly packing a large number of filter media, such as resin containers for lactic acid bacteria beverages, which are varied in shape and have gaps between them, the flow of sewage varies widely. It is possible to create a wide range of changes in the concentration of dissolved oxygen and create a variety of living environments for microorganisms, which allows many kinds of microorganisms to reproduce and digest and decompose organic substances contained in wastewater. Therefore, the organic matter contained in the wastewater is efficiently digested and decomposed to promote the purifying action. Further, since the sewage is advected into the contact aeration tank (7) through the flow rate adjuster (13), even if a large amount of sewage temporarily flows into the second settling tank (6), the sewage flow rate is adjusted. The device (13) allows advection into the contact aeration tank (7) while maintaining a constant flow rate, whereby sewage can hold a residence time necessary for digesting and decomposing organic matter by microorganisms, and It is possible to prevent a rapid change in the flow velocity, prevent the membrane of microorganisms attached to the surface of the filter medium from being destroyed, and maintain the purification function.

After this, the sewage obtained by digesting and decomposing organic substances by aerobic microorganisms in the contact aeration tank (7) is used as a partition plate (4).
Disinfection tank that has been transferred to the settling tank (8) through the flow hole (18) of the above, where flocs and the like of aerobic microorganisms are settled and separated by the settling separation action, and then overflowed and transferred to the baffle plate (19). (8a) overflows the overflow weir (20) and passes through the disinfection cylinder (21) to be uniformly disinfected and discharged as treated water from the outflow pipe (22).

[0024]

EFFECTS OF THE INVENTION According to the present invention, the inside of one processing vessel is divided into four tanks including a first precipitation separation tank, a second precipitation separation tank, a contact aeration tank and a disinfection tank, and each layer is connected in series. Since the device is divided into two parts, the device can be downsized and the structure can be simplified as compared with the conventional device. Therefore, the downsizing of the device makes it very easy to carry it to the installation site and install / construct it. Moreover, the simplified structure reduces the number of steps in assembling and simplifies the work. The number of parts is reduced and the cost of the entire device can be reduced. Then, by reducing the number of tanks from 7 to 4, the number of manholes can be reduced, and the difference in the bottom of the pipe can be shortened to increase the degree of freedom in the installation conditions.

Further, since the number line is vertically movably inserted into the sewage intake pipe of the flow rate controller, and the number line is supported by the float floating on the sewage surface stored in the second settling tank,
The sewage intake pipe of the flow rate regulator is not clogged with solid matter in the sewage, and it can be used for a long period of time without requiring human labor, and maintenance is easy.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a sewage treatment apparatus according to the present invention (a sectional view taken along the line AA in FIG. 2).

FIG. 2 is a plan view of an embodiment of the device of the present invention.

FIG. 3 is a detailed view of a flow rate regulator.

FIG. 4 is a perspective view showing a disassembled state of a conventional sewage treatment apparatus.

[Explanation of symbols]

 1 Processing Container 2 Partition Plate 3 Partition Plate 4 Partition Plate 5 First Precipitation Separation Tank 6 Second Precipitation Separation Tank 7 Contact Aeration Tank 8 Precipitation Tank 8a Disinfection Tank 9 Inflow Pipe 10 Flow Hole 11 Detour Plate 12 Detour Plate 13 Flow Regulator 14 Detour plate for preventing clogging 15 Filter bed 16 Cylindrical body 17 Aeration pipe 18 Flow hole 19 Baffle plate 20 Overflow weir 21 Disinfection cylinder 22 Outflow pipe 23 Manhole 24 Manhole 25 Manhole

Claims (2)

[Claims] 1. The inside of one processing container is divided in series by a plurality of partition plates so that the first precipitation separation tank, the second precipitation separation tank, the contact aeration tank and the precipitation tank are lined up in order. An inflow pipe for introducing wastewater to be treated is provided in the first precipitation separation tank, and a partition plate that separates the second precipitation separation tank from the second precipitation separation tank is provided with a flow hole having a bypass plate before and after the partition plate. The partition plate that separates the second sedimentation tank and the contact aeration tank is provided with a flow controller for adjusting the flow rate of the sewage quantitatively, and a detour for preventing clogging is provided in front of the flow controller. A plate is provided, and the contact aeration tank is provided with a filter bed that is formed by randomly packing a large number of filter media that are varied in shape and have gaps between them, and air is blown into the filter bed to cause aeration. Rectify the aeration pipe as needed Two plates are provided with a plate interposed therebetween, and a partition plate that separates the plate from the settling tank is provided with a flow hole, and the settling tank is sterilized by a baffle plate having an L-shaped cross section. A sewage treatment apparatus characterized in that a tank is formed, an overflow weir and a disinfection cylinder are provided in the disinfection tank, and an outflow pipe for discharging treated sewage is provided. 2. A number line is vertically movably fitted in a sewage intake pipe for taking in sewage of the flow rate regulator, and the number line is supported by a float floating on the sewage surface stored in the second settling tank. The sewage treatment apparatus according to claim 1, wherein