JP2001087781A - Treating device for waste water including organic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treating device for waste water including organic mate rial, which enables miniaturization and cost saving thereof while keeping high performance of the cleaning treatment. SOLUTION: This treating device is provided with an inlet pipe 1 through which the waste water is fed into the bottom part side, an outlet pipe 13 through which treated water is discharged from the upper side, a vessel body 2 of a vessel incorporating an air diffusing pipe 4 which diffuses and discharges the air from the outside into the waste water, and a waste water cleaning part which is disposed on the upper side of the air diffusing pipe 4. The waste water cleaning part is formed as a layer where a number of carriers 5 which can adhere aerobic microorganisms on the surface thereof and are suspended in the waste are confined between outflow preventing nets 6 and 8 disposed on a pair of upper and lower. Further, the bottom part side of the vessel body 2 of the vessel is formed as a storage part 9 where solid part, and the like, and deposited and a transfer pipe 10 through which the deposit accumulated in the storage part 9 is discharged outside the vessel body 2 of the vessel by pneumatic transportation is disposed on the treating device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage purification treatment, and more particularly to a treatment apparatus for purifying sewage containing organic matter.

[0002]

2. Description of the Related Art Conventionally, various treatment methods and treatment apparatuses for purifying sewage have been used. Among them, a typical example suitable for purifying wastewater containing organic matter is disclosed in, for example, Japanese Patent Application Laid-Open No. 55-13155. FIG. 2 is a schematic diagram of a conventional sewage treatment apparatus. In FIG. 2, an aeration tube 16 is disposed on the bottom side of an aeration tank 14 into which sewage is introduced, and a filter medium 15 lighter than water is provided for the introduced sewage. Floating. Air is supplied to the air diffuser 16 from the outside and is released into the sewage in the aeration tank 14 and is maintained in an aerobic state. Therefore, the aeration tank 14
The wastewater introduced into the filter medium 15 is purified by contacting the aerobic microorganisms attached to the filter medium 15.

[0003]

However, in the conventional configuration, since the filter medium 15 floats in the sewage, it tends to flow out of the aeration tank 14. If the filter medium 15 flows out and is thus lost, there is a problem that the purification efficiency of the sewage is significantly reduced, the amount of the sewage to be treated is reduced, and the treatment time is prolonged.

[0004] Further, a place for temporarily storing solids and excess sludge flowing into the aeration tank 14 and equipment for carrying out and collecting these solids and excess sludge from the aeration tank 14 are generally provided. Absent. For this reason, solids and excess sludge flow out of the aeration tank 14 as they are, and are mixed into the purified water after treatment, resulting in extremely poor discharge water quality.

[0005] From the above, in order to prevent the outflow of the filter medium 15 and maintain the purification performance, and to prevent the solids and excess sludge from flowing out and to improve the quality of the discharged water, the aeration tank 14 must be equipped with large-scale equipment. There is nothing other than to do. When the size of the aeration tank 14 is increased in this way, not only the operation of the purification process becomes complicated, but also a high level of management is required, so that not only the equipment but also the operating cost increases.

Accordingly, an object of the present invention is to provide an apparatus for treating sewage containing organic substances which can be reduced in size and cost while maintaining high purification performance.

[0007]

According to the present invention, there is provided an apparatus for treating sewage containing organic matter, comprising: a tank body having a flow path for supplying sewage to a bottom side and a flow path for discharging treated water from an upper side; A diffuser is disposed inside the tank body and diffuses and discharges air from the outside into the sewage, and a sewage purifier disposed above the diffuser is provided, wherein the sewage purifier is aerobic. It is characterized by being a layer capable of adhering microorganisms to the surface and enclosing a large number of carriers floating in sewage.

In such a configuration, the aerobic microorganisms can be attached to the surface of the carrier by turning the wastewater into an aerobic atmosphere by the aeration means, and there is no outflow of the carrier for oxidatively decomposing organic substances. Wastewater can be treated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a tank body provided with a flow path for supplying sewage to the bottom side and a flow path for discharging treated water from above, and the inside of the tank body. Diffuser means arranged to diffuse air from the outside into the wastewater,
And a sewage purification unit disposed above the aeration means,
The sewage purification section is a sewage treatment apparatus containing organic matter, which is a layer capable of adhering aerobic microorganisms to the surface and containing a large number of carriers floating in the sewage,
The aeration means has the effect of making the wastewater an aerobic atmosphere, allowing the aerobic microorganisms to adhere to the surface of the carrier, preventing the carrier from oxidizing and decomposing organic substances, and reducing the size of the tank body.

According to a second aspect of the present invention, the sewage purifying section includes a pair of upper and lower nets developed on an inner cross section of the tank body, and the carrier is movably sealed between the nets. The treatment apparatus for wastewater containing organic matter according to claim 1, wherein the flow of the carrier promotes the catalytic oxidation of the organic matter and prevents the outflow of the carrier.

According to a third aspect of the present invention, the net disposed above the sewage purifying unit is provided with an openable / closable lid for replacing or filling the carrier. A wastewater treatment device containing the organic matter described above, which has an effect that the carrier can be replaced or replenished by opening a lid.

According to a fourth aspect of the present invention, the net disposed above the sewage purifying unit is set at a distance of 5 cm from the water surface in the tank body.
The wastewater treatment apparatus containing organic substances according to claim 2 or 3, wherein the wastewater treatment apparatus is arranged 20 cm below, and the carrier can be exchanged in a short time without draining the water in the tank body. This has the effect of reducing costs.

According to a fifth aspect of the present invention, there is provided an apparatus for treating sewage containing organic matter according to any one of the first to fourth aspects, wherein the sewage is passed upward from the bottom of the tank body. There is an effect that the tank main body can be reduced in size and the cost can be reduced.

According to a sixth aspect of the present invention, the inflow solids contained in the sewage and the excess sludge generated by purification are sedimented and stored on the lower side of the air diffuser and on the bottom side of the tank body. 6. An apparatus for treating sewage containing organic matter according to any one of claims 1 to 5, wherein the storage section is located on the bottom side of the tank main body, so that inflow solids are contained. In addition, it is possible to prevent the excess sludge from being diffused in the tank body, to constantly maintain a high purification capacity, and to reduce the size of the tank body.

The invention according to claim 7 is characterized in that the storage section is provided with a transfer means for discharging the inflow solid portion and excess sludge to the outside of the tank main body by vapor phase conveyance. The wastewater treatment apparatus containing organic matter according to claim 6, wherein the sediment is periodically discharged to prevent the inflow solid matter and excess sludge from being diffused in the tank body, and always maintain a high purification ability. Therefore, an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an outline of an apparatus for treating wastewater containing organic matter according to an embodiment of the present invention.

As shown in the figure, the apparatus for treating sewage containing organic matter according to the present invention supplies sewage to an aerobic tank body 2 to purify the sewage. An outflow pipe 13 for discharging purified water from the pipe 1 and a portion immediately below the water surface is provided. The tank body 2 is made of, for example, synthetic resin such as FRP or FRTP, metal, concrete or the like subjected to a water leakage prevention treatment.

The bottom side of the tank body 2 is a storage section 9 for storing inflow solids and excess sludge, and an air diffuser 4 is disposed in the storage section 9 so as to be biased upward. The lower outflow prevention net 8 and the upper outflow prevention net 6 are separated from each other, and the carrier 5 is accommodated between the lower and upper outflow prevention nets 8, 6.

The air diffuser 4 is made of a material such as hard vinyl chloride or sintered resin. The air diffuser 4 is connected to an air pump 3 installed outside the tank main body 2. Aeration and aeration to the wastewater inside.

The carrier 5 is formed of a material such as urethane foam, plastic, synthetic resin, hollow ceramic, pumice, etc., to which microorganisms are liable to adhere, and is a cube, a rectangular parallelepiped, a cylinder or a sphere of about 7 to 10 mm. Things. And by using such a material and size, the specific gravity of the carrier 5 becomes about 0.9 to 1.8, and the carrier 5 easily flows in water. In addition, aerobic microorganisms are attached to the surface of the carrier 5, and so-called aerobic treatment, in which organic substances in the water are taken in and brought into contact with the wastewater sent into the tank body 2 to oxidize and decompose, is possible.

The upper outflow prevention net 6 is a net made of a material such as metal or plastic having a mesh of about 5 mm, and prevents the carrier 5 from flowing out to the upper part of the tank body 2. In addition,
A part of the upper outflow prevention net 6 is provided with an openable / closable lid 7 which can be opened / closed. When the carrier 5 is to be refilled, the openable / closable lid 7 may be opened. Hold.

The lower outflow prevention net 8, like the upper outflow prevention net 6, is a net made of metal, plastic, or the like having a mesh of about 5 mm, and prevents the carrier 5 from flowing out to the storage section 9 side.

Further, a transfer pipe 10 is provided for discharging inflow solids and excess sludge accumulated in the storage section 9 to the outside. The transfer pipe 10 has its lower end inserted to the lower end side of the storage section 9 and forms a flow path to the outside of the tank main body 2 through the portions partitioned by the upper and lower outflow prevention nets 6 and 8. I have. The transfer of solids and the like by the transfer pipe 10 is a gas phase transfer using air from the air pump 3, and the transfer pipe 1
The flow path of the air pump 3 is connected to both the zero and the diffuser 4. The valves 11, 1 are provided in each of these flow paths.
Air is supplied from the air pump 3 to either the air diffuser 4 or the transfer pipe 10 by a combination of opening and closing operations.

In the above arrangement, the wastewater containing organic matter is supplied from the inflow pipe 1 to the bottom of the tank body 2, and the solid matter in the wastewater precipitates and is stored in the storage section 9 at the bottom of the tank body 2. The sewage supplied to the bottom of the tank body 2 flows upward in the tank body 2 and is purified by aerobic biological treatment in this flow. That is, the air sent from the air pump 3 is discharged from the air diffuser 4, and the inside of the tank body 2 on the upper side of the air diffuser 4 is always maintained in an aerobic state. Therefore, the carrier 5 floating in the sewage is in an aerobic atmosphere, and organic matter in the wastewater is taken in and oxidatively decomposed by the aerobic microorganisms attached to the carrier 5. Then, the water purified by the oxidative decomposition of such organic matter is supplied to the outflow pipe 13.
Is discharged from

At the time of oxidative decomposition of organic substances in this aerobic atmosphere, only the valve 11 is opened, the valve 12 for supplying air for transferring solids and the like is closed, and the air from the air pump 3 is supplied only to the air diffuser 4. Supplied to The carrier 5 which is indispensable for the oxidative decomposition of the organic matter flows in a portion partitioned by the upper outflow prevention net 6 and the lower outflow prevention net 8, and the carrier 5 does not flow out to the water surface side or the storage section 9 side. On the other hand, surplus sludge generated due to solid content contained in sewage and purification is
It is settled and stored at the bottom of the tank body 2 by gravity. Since the storage unit 9 is located below the air diffuser 4, the influence of the water flow generated by the air discharged from the air diffuser 4 is small,
The solids and the excess sludge are kept in a settled state without being stirred.

The solid content and excess sludge settled in the storage section 9 are periodically discharged to the outside of the tank body 2 by the transfer pipe 10 for processing. The discharge operation by the transfer pipe 10 is performed by closing the valve 11 on the side of the diffusion pipe 4 and the valve 1 on the side of the transfer pipe 10.
2 is opened and air is supplied from the air pump 3 to the transfer pipe 10. That is, by connecting the flow path from the air pump 3 near the lower end of the transfer pipe 10, the solid content and the excess sludge in the storage unit 9 are sucked when the supplied air rises up the transfer pipe 10. Then, the gas is transported upward in the transfer pipe 10 and discharged to the outside. The valve 11,
The opening and closing operation of 12 may be manual or automatic control by a timer.

During the period of discharging solids and excess sludge, no air is released from the air diffuser 4, so that all the carriers 5 settle on the lower outflow prevention net 8. Therefore, when the carrier 5 needs to be replaced, the sedimentary carrier 5 can be easily taken out by opening the openable lid 7 and can be replaced with a new carrier 5. Also, when the carrier 5 is refilled, the openable lid 7 may be opened similarly.

Since the flow of the sewage in the tank body 2 is upward, the storage section 9 can be installed at the bottom. That is, for example, in a structure in which sewage flows in from the upper part of the tank body 2, the inflow solids stay above the upper outflow prevention net 6. Things cannot be sedimented. For this reason, it is necessary to separately provide a storage section for storing the sediment, and a design for securing a space for this is required. On the other hand, in the present invention, since the flow of the sewage is directed upward in the tank main body 2, the storage section 9 can be provided at the bottom of the tank main body 2, and there is no need to separately provide the storage section.

Further, since the storage section 9 can be arranged at the bottom of the tank main body 2 and the flow of sewage in the tank main body 2 is upward, a space can be provided on the upper side of the tank main body 2. Therefore, the upper outflow prevention net 6 is set at 5 to 20
cm below. Therefore, the openable and closable lid 7 can be opened and closed without draining the water in the tank body 2, and the carrier 5 can be replaced or replenished in a very short time. Further, since the carrier 5 is settled on the lower outflow prevention net 8, it does not flow out from the openable lid 7.

[0030]

According to the present invention, the carrier can be made to flow only in the layer enclosed by the net or the like, so that a high purification ability can be always maintained and there is no outflow of the carrier. Therefore, the size of the aerobic tank body can be reduced, and the frequency of work for replenishing the carrier is reduced. Since the device can be miniaturized in this way, it does not require a large installation space with cost and energy savings, and since it can be composed of only unit devices, complicated operation and management are not required. As a result, sewage treatment can be performed with high efficiency, and a sewage treatment apparatus suitable for mass production at low cost can be realized.

In the case where the opening / closing type lid is provided on the upper net, the exchange or replenishment of the carrier can be easily performed, and the proper amount of the carrier can always be held in the aerobic tank body. High purification capacity can be maintained, and as a result, the layer main body can be reduced in size.

By making the sewage in the aerobic tank body upward flow, the net placed on the upper side is 5 cm to 20 cm from the water surface.
Since the carrier can be installed below and the carrier can be replaced in a short time without draining the water in the tank body, the running cost can be significantly reduced.

In the bottom of the tank body, a storage unit for storing inflow solids and excess sludge is provided, and a transfer means for transferring the accumulated sediment to the outside is provided. Dispersion of wastes and excess sludge in the tank body can be prevented, and high purification performance can always be maintained. As a result, the tank body can be downsized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an outline of an apparatus for treating wastewater containing organic matter according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a conventional sewage treatment apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inflow pipe 2 Tank main body 3 Air pump 4 Air diffusion pipe 5 Carrier 6 Upper outflow prevention net 7 Openable lid 8 Lower outflow prevention net 9 Storage section 10 Transfer pipe 11 Valve 12 Valve 13 Outflow pipe 14 Aeration tank 15 Filter medium 16 Air diffusion pipe

Claims (7)

[Claims] 1. A tank body provided with a flow path for supplying sewage to the bottom side and a flow path for discharging treated water from above, and an external air disposed inside the tank main body and allowing external air to enter the sewage. A diffuser that diffuses and emits air, and a sewage purifier disposed above the diffuser is provided, wherein the sewage purifier is capable of adhering aerobic microorganisms to a surface and is capable of floating a large number of sewage in sewage. An apparatus for treating wastewater containing organic matter, which is a layer containing a carrier. 2. The sewage purifying section comprises a pair of upper and lower meshes developed on an inner cross section of the tank body, and the carrier is movably sealed between the meshes. Item 10. A wastewater treatment apparatus containing an organic substance according to Item 1. 3. The sewage containing organic matter according to claim 2, wherein the net disposed on the upper side of the sewage purifying unit is provided with a lid that can be opened and closed for replacing or filling the carrier. Processing equipment. 4. An apparatus for treating sewage containing organic matter according to claim 2 or 3, wherein the mesh body disposed above the sewage purification section is arranged 5 cm to 20 cm below the water surface in the tank body. . 5. The apparatus for treating sewage containing organic matter according to claim 1, wherein the sewage is passed upward from the bottom side of the tank body. 6. A storage section for depositing and storing inflow solids contained in sewage and excess sludge generated by purification, below the aeration means and on the bottom side of the tank body. A wastewater treatment apparatus containing organic matter according to any one of claims 1 to 5, characterized in that: 7. The storage unit according to claim 6, further comprising a transfer means for discharging the inflow solid portion and the excess sludge to the outside of the tank body by vapor-phase conveyance. Wastewater treatment equipment including.