JP2001310195A - Cleaning treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning treatment apparatus for separately performing the oxidative decomposition of an organic substance by aerobic microorganisms and the chemical combination of an inorganic substance such as phosphorus, or the like, to effectively develop the cleaning capacity of individual filter materials to enhance cleaning efficiency. SOLUTION: An annular treatment tank 1 is constituted of a first outer annular bed 10 and a second inner annular bed 11 both of which are demarcated in a communication state through a large numbe of water passing holes 15 and the first outer annular bed 10 is allowed to communicate with water 6 to be treated of lakes and marshes 5 through the water passing holes 15 and the second inner annular bed 11 is allowed to communicate with an air lift passage 2 through the water passing holes 15 and the annular treatment tank 1 is held under the surface of the water of the lakes and marshes 5 by a float body 4. Lift air is ejected in the air lift passage 2 from the lower end part thereof by an air supply pipe 30. The first outer annular bed 10 is packed with charcoal 7 as a first filter medium and the second inner annular bed 11 is packed with oyster shells 8 as a second filter medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to lakes, ponds, dams,
The present invention relates to a purification treatment apparatus for purifying sewage in water bodies such as reservoirs, rivers, and irrigation canals.

[0002]

2. Description of the Related Art In closed water areas such as lakes, ponds, dams, and reservoirs, algae such as blue-green algae are generated near the surface of water having a relatively high oxygen concentration. Dead organisms rot and accumulate on the bottom as sludge, causing water pollution.

[0003] For this reason, aerobic microorganisms oxidize and decompose algae such as blue water, organic suspended matter, and soluble organic substances in the water to be treated, thereby purifying the BO efficiently.
As a device for improving D (biochemical oxygen demand) and COD (chemical oxygen demand), Patent Registration No. 26752
No. 61 purification apparatus is provided.

[0004] The conventional purification treatment apparatus comprises a cylindrical water collecting body having a plurality of water passage holes on a peripheral surface through which water to be treated in a treated water area having a water flow can flow, and a substantially coaxial shape inside the water collecting body. A cylindrical lift pipe provided with an inflow hole into which the water to be treated is introduced at a lower end thereof; air deriving means provided in the lift pipe for ejecting air near a lower end portion of the lift pipe; An outer body having a plurality of water collecting holes through which water can flow around the peripheral surface, including the water collecting body in the up-down direction in the axial direction, and having an outflow hole continuous to an upper end edge of the lift pipe; A treatment layer having a charcoal provided between the body and carrying aerobic microorganisms and allowing the water to be treated to flow in the thickness direction, and a floating body that holds the outer body below the surface of the treated water area. A plurality of the treated charcoal particles are arranged in the treated water area such that the particle size of the charcoal decreases in accordance with the downstream side. To have.

[0005] According to the purification apparatus configured as described above, the upstream side where the polluted state is high, the particle size of the charcoal is large, and clogging between the charcoals is prevented. Since the particle size of the charcoal is small on the side, the purification process is performed efficiently, and the charcoal used has a large particle size range, so that the charcoal can be used without waste.

[0006]

In the above-mentioned conventional purification treatment apparatus, charcoal which effectively supports aerobic microorganisms is used as a filter medium constituting the treatment layer. By oxidatively decomposing organic suspended substances and soluble organic substances and purifying them efficiently, BO
D and COD can be improved. However, they lack the ability to remove other inorganic substances such as phosphorus.
For this reason, by forming the treatment layer with a filter material having a composite structure in which a filter material such as a shell or a metal piece containing a large amount of calcium that is combined with an inorganic material such as phosphorus and a filter material made of the charcoal, the inorganic material is formed. It is also possible to carry out a purification process.

However, if a single treatment layer is composed of a filter medium having a composite structure, the oxidative decomposition of organic substances by aerobic microorganisms and the combination of inorganic substances such as phosphorus are simultaneously performed in the single treatment layer. However, it is difficult to effectively exert the purifying ability of each filter medium, and there is a problem that the purifying efficiency is reduced. In addition, it is impossible to uniformly dispose different types of filter media to give uniform purification conditions to the water to be treated without using the same tank.

[0008] Therefore, the present invention is to improve the purification efficiency of each filter medium by effectively performing the oxidative decomposition of an organic substance by an aerobic microorganism and the compounding of an inorganic substance such as phosphorus separately. It is an object of the present invention to provide a purification treatment device capable of performing the above-mentioned treatment.

[0009]

In order to achieve the above object, a purification treatment apparatus according to the present invention is constructed so that water to be treated in a treated water area can be circulated and a filter medium is filled therein. An annular processing tank, an air lift passage formed vertically through the center of the annular processing tank, and air ejecting means for ejecting lift air to a lower end of the air lift passage. A floating body for holding the annular treatment tank below the surface of the treated water area, wherein the annular treatment tank is divided into a plurality of layers in a circumferential direction and is adjacent to each other so as to communicate with each other. It is characterized by:

According to the present invention, since the annular treatment tank is divided into a plurality of layers in the circumferential direction, a filter medium which supports aerobic microorganisms in the plurality of layers and is effective for oxidative decomposition of organic substances;
A filter medium effective for compounding the inorganic substance can be separately filled. Thereby, the oxidative decomposition of the organic substance by the aerobic microorganisms and the compounding of the inorganic substance can be performed independently, so that the purifying ability of each filter medium can be effectively exhibited, and the purifying efficiency can be improved. In the annular processing tank,
Since the volume gradually decreases from the outer periphery to the inner periphery, the flow rate of the water to be treated flowing from the outer periphery of the annular treatment tank toward the inner air lift passage gradually increases toward the inner periphery. That is, the flow velocity of the water to be treated flowing through the inner peripheral layer is higher than the flow velocity of the water to be treated flowing through the outer peripheral layer. For this reason, the outer layer is filled with a filter medium that is efficiently purified by flowing the water to be treated at a low speed, and the inner layer is efficiently purified even when the water to be treated is passed at a high speed. The purification efficiency can be further improved by filling the filter medium.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. 1.
And an air lift passage 2, air blowing means 3, and a floating body 4 for holding the annular processing tank 1 below the surface of a processing water area such as a lake 5.

The annular treatment tank 1 is configured so that water to be treated 6 such as a lake or marsh 5 can flow therethrough, and has a first annular layer 10 on the outer periphery and an inner periphery of the first annular layer 10. The air lift passage 2 is formed so as to penetrate vertically through the center portion of the second annular layer 11 on the inner peripheral side adjacent to the second annular layer 11 in a state of communication with the air lift passage 2.

That is, the annular processing tank 1 has a cylindrical outer peripheral wall 12, a cylindrical inner peripheral wall 13 forming the outer periphery of the air lift passage 2, and a cylindrical inner wall 13, which is disposed between the inner and outer peripheral walls 13, 12. The first annular layer 10 is formed by a cylindrical outer peripheral wall 12 and an annular space surrounded by the cylindrical partition wall 14, and the cylindrical partition wall 14 and the cylindrical inner wall are formed. Perimeter wall 1
The second annular layer 1 is defined by an annular space surrounded by
1 are formed. In addition, each of the peripheral walls 12, 13, 14
Are provided with a large number of water passage holes 15, and the lower end portions of the first annular layer 10 and the second annular layer 11 are formed by an annular bottom plate 17 having a large number of water passage holes 16. Closed, the first annular layer 10 and the second annular layer 11
Is closed by an annular upper plate 18.

The air jetting means 3 is for jetting lift air from the lower end of the air lift passage 2.
An air supply pipe 30 having an outlet opening upward facing the lower end of the air lift passage 2, an air supply source 31 formed by an air compressor or an air pump to which the inlet of the air supply pipe 30 is connected; Air supply source 31
Power supply 32 for supplying power to the power supply, and a solar cell 33 for supplying power to the power supply 32.
Is composed of a control unit provided with an inverter circuit for converting a DC current from a solar cell 33 into an AC current, a controller for setting and controlling the power supplied to the air supply source 31, and a storage battery. The power supply device 32, the solar cell 33, and the like are mounted on the floating body 4.

The floating body 4 has a buoyancy of which its upper part is located above the water surface of the lake 5 so that the annular processing tank 1 can be positioned below the water surface of the lake 5. An annular processing tank 1 is detachably connected via means.

On the other hand, the first annular layer 10 is filled with charcoal 7 having a particle size larger than the inner diameter of the large number of water holes 15 and 16 as a first filter medium, and the second annular layer 11 is filled with charcoal 7. ,
The oyster shell 8 having a particle size larger than the inner diameter of the water passage holes 15 and 16 is filled as the second filter medium.

The floating body 4 is fixed to the shore of the lake 5 via a rope or a wire (not shown) so as not to move due to wind, waves and the like.

According to the above configuration, an electromotive force is generated by irradiating the solar cell 33 with a predetermined amount of light, and the electromotive force is supplied to a control unit (not shown) of the power supply device 32.
The supplied DC electromotive force is converted into AC by an inverter circuit of a control unit, and a predetermined amount of power set in advance by a controller is supplied to an air supply source 31 including an air compressor or an air pump to be driven.

When the air supply source 31 is driven, lift air is ejected upward from the outlet of the air supply pipe 30 to the lower end of the air lift passage 2. The jetted air becomes bubbles and rises in the air lift passage 2 and flows out to the lake 5. In other words, the water 6 to be treated in the air lift passage 2 together with the air bubbles is raised as shown by an alternate long and short dash line arrow, and flows out to the lake 5. As a result, the pressure of the air lift passage 2 becomes lower than the outer peripheral area of the annular processing tank 1. When the pressure in the air lift passage 2 is reduced, the water 6 to be treated in the vicinity of the water surface in the lake 5 passes through the large number of water holes 15 of the cylindrical outer peripheral wall 12 as shown by solid arrows, and the first water flows through the first water passage 15.
Flows from the first annular layer 10 to the second annular layer 11 through many water holes 15 of the cylindrical partition wall 14.
Flows from the second annular layer 11 to the cylindrical inner peripheral wall 1.
3, and flows out to the air lift passage 2 through a large number of water holes 15 to join the air lift indicated by the dashed line arrow. That is, the to-be-processed water 6 in the vicinity of the water surface in the lake 5 flows out from the outer periphery of the annular treatment tank 1 toward the inner periphery, and then flows out to the lake 5.

The first annular layer 10 has a large number of water holes 1.
Charcoal 7 having a particle size larger than the inner diameter of 5, 16 is the first.
Since the oyster shell 8 having a particle size larger than the inner diameter of the large number of water holes 15 and 16 is filled as the second filter medium in the second annular layer 11, the first annular layer 11 is filled with the first annular layer 11. The water to be treated 6 flowing through the annular layer 10 toward the second annular layer 11 is subjected to oxidative decomposition of algae such as blue-green algae, organic suspended matters, and soluble organic substances by aerobic microorganisms supported on charcoal 7. The primary purification process is performed efficiently. In the treated water subjected to the primary purification treatment, the phosphorus in the treated water is combined with the calcium in the oyster shell 8 while flowing through the second annular layer 11 toward the air lift passage 2 so that the secondary purification treatment is efficiently performed. Will be done. Further, the treated water subjected to the primary / secondary purification treatment repeatedly circulates up the air lift passage 2 and returns to the lake 5 as shown by a dashed-dotted arrow, whereby the water 6 to be treated of the lake 5 is Purification processing is performed.

The annular processing tank 1 is the first annular layer 1 on the outer peripheral side.
0 and a plurality of inner circumferential second annular layers 11, the first annular layer 10 is filled with charcoal 7, and the second annular layer 11
Since the oyster shell 8 is filled, the oxidative decomposition of the organic substance by the aerobic microorganisms and the compounding of the inorganic substance can be performed independently. For this reason, the purification ability of the charcoal 7 and the oyster shell 8 can be effectively improved as compared with a conventional purification apparatus in which the treatment layer is formed by a composite filter medium in which the charcoal 7 and the oyster shell 8 are mixed. It becomes possible to improve the purification efficiency.

Further, in the annular processing tank 1, since the volume gradually decreases from the outer peripheral part toward the inner peripheral part, the water 6 to be treated flowing from the outer periphery of the annular processing tank 1 toward the inner peripheral air lift passage 2. Increases gradually toward the inner circumference. That is, the flow velocity of the water 6 flowing through the second annular layer 11 is higher than the flow velocity of the water 6 flowing through the first annular layer 10. For this reason, the first annular layer 10 is filled with charcoal 7 that is efficiently purified by flowing the water 6 at a low speed, and the second annular layer 11 is filled with the water 6 at a high speed. The oyster shell 8, which is efficiently purified even when the water is allowed to flow, can be further improved in purification efficiency.

If the purification ability of the charcoal 7 and the oyster shell 8 is reduced by the long-term purification treatment, the purification treatment device is moved to the shore of the lake 5 and the annular treatment tank 1 is removed from the floating body 4. Then, a new annular processing tank 1 may be replaced and attached to the floating body 4.

On the other hand, as shown by a two-dot chain line, an annular backwash header pipe 9 in which a large number of nozzles 9A, 9A,. Tube 9 is divided into first annular layer 10 and second annular layer 11
The backwash header tube 9 and the air supply source 31 are disposed upwardly below the bottom plate 17 in accordance with
, And by driving the air supply source 31, the air ejected from the multiple nozzles 9 </ b> A, 9 </ b> A,... Is allowed to flow as indicated by the two-dot chain line arrow, and the excess aerobic microorganisms are separated from the charcoal 7. In addition, back washing for removing excess compound from the oyster shell 8 can be performed. In this case, a large number of nozzles 9
A, 9A,... Are provided with flow control valves (not shown), and the flow rates of the air indicated by the two-dot chain arrows ejected from the nozzles 9A, 9A,. Thus, the separation of the aerobic microorganisms from the charcoal 7 and the separation of the compound from the oyster shell 8 can be adjusted as desired.

In the above-described embodiment, the annular processing tank 1 is described as having a two-layer structure of the first annular layer 10 and the second annular layer 11. However, the annular processing tank 1 has a multilayer structure of three or more layers. Processing tank 1
May be configured. Also, charcoal 7 is used as the first filter medium and oyster shell 8 is used as the second filter medium.
The first filter medium other than the first filter medium and the second filter medium other than the oyster shell 8 may be appropriately selected and used. Furthermore, although the description has been given of the configuration in which the solar cell 33 supplies power to the air supply source 31, a power supply wire is attached to a rope or a wire for positioning the floating body 4, and provided on the shore of the lake 5 through the wire. Power may be supplied from the power supply equipment to the air supply source 31. In the case of the embodiment configuration in which power is supplied by the solar cell 33,
Even at night or the like, no electromotive force is generated by the solar cell 33, and even if the storage capacity of the storage battery is reduced and the air supply source 31 cannot be driven, it is sufficient if the air supply source 31 can be driven only during the day.

[0026]

As described above, since the purification treatment apparatus according to the present invention is constituted, the following special effects can be obtained.

That is, since the annular treatment tank is divided into a plurality of layers in the circumferential direction, aerobic microorganisms are supported on the plurality of layers, and a filter medium effective for oxidative decomposition of organic substances and a compound of inorganic substances. By separately filling an effective filter medium, oxidative decomposition of organic substances by aerobic microorganisms and compounding of inorganic substances can be performed independently. Therefore, it becomes possible to effectively exert the purifying ability of each filter medium and improve the purifying efficiency. In the annular treatment tank, the flow velocity of the water to be treated that flows from the outer periphery toward the inner air lift passage gradually increases. For this reason, the outer layer is filled with a filter medium that is efficiently purified by flowing the water to be treated at a low speed, and the inner layer is efficiently purified even when the water to be treated is passed at a high speed. The purification efficiency can be further improved by filling the filter medium.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 annular treatment tank 2 air lift passage 3 air jetting means 4 floating body 5 treated water area such as lakes and marshes 6 water to be treated 7 first filter medium such as charcoal 8 second filter medium such as oyster shell 9 first annular tank 10 second Annular tank

Claims (1)

[Claims] 1. An annular treatment tank, which is configured to allow the flow of water to be treated in a treatment water area and is filled with a filter medium, and penetrates vertically through a central portion of the annular treatment tank. An air lift passage formed in the air lift passage, air ejecting means for ejecting air for lift to the lower end of the air lift passage, and a floating body for holding the annular treatment tank below the surface of the treatment water area. In the purification treatment apparatus, the annular treatment tank is divided into a plurality of layers in a circumferential direction and is adjacent to each other so as to communicate with each other.