JPH10309573A - Purification method of sewage and device therefore - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a purification method of sewage and its device enabling even very dirty sewage to satisfactorily change to industrial waste water and drinking water, etc., by classifying the filters to special filters and performing a special pre-treatment. SOLUTION: A pre-treatment device is constituted of being successively in series connected a sewage receive tank 1, plural stages of electrostatic voltage conductive pipes 13-16, an electrolysis cell 2 and plural stages of electrostatic voltage conductive pipes 30-33. The impurities re removed, dissolved oxygen is increased and water pressure is increased. Succeeding to the pre-treatment device, a residue treating filter 3, an organic matter separation filter 4, a molecular separation filter 5 and an advanced organic matter separation filter 6 are successively in series connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for obtaining purified water by treating wastewater from rivers, industrial wastewater, or sludge-like wastewater with a filter.

[0002]

2. Description of the Related Art Conventionally, sewage has been generally treated by a filter to obtain purified water such as drinking water.

[0003]

By the way, in the case of the above-mentioned conventional example, when the degree of sewage is light, a certain amount of purified water such as drinking water can be obtained only by a filter. If the degree of sewage such as that of a filter is severe, there is a risk that desired purified water cannot be obtained only with a filter.

[0004] The present invention has been made in view of such problems, and a purpose thereof is to provide a filter.
The present invention aims to provide a method and an apparatus for purifying sewage which can be sufficiently converted into industrial wastewater, drinking water, and the like even if the sewage is extremely dirty, by classifying the sewage into a special one and performing a special pretreatment.

[0005]

In order to achieve the above object, a method for purifying sewage according to the present invention comprises the steps of removing impurities, increasing dissolved oxygen and increasing water pressure as pretreatments.
A residue treatment filter, an organic matter separation filter, a molecular separation filter, and an advanced organic matter separation filter are sequentially flowed down.

[0006] Further, as the pretreatment, the entanglement of the sewage between the sewage is released by stirring in the sewage receiving tank to impart fluidity to the sewage, and the sewage is supplied to a plurality of points in the middle of the supply pipe to the electrolysis tank. To increase the amount of dissolved oxygen due to electrostatic potential conduction, and to further increase the fluidity of the wastewater by breaking the fine entanglement of the waste between the wastewater by supplying electricity and supplying compressed air in the electrolysis tank and stirring. In addition, the present invention is characterized in that impurities are removed and sewage pressure is increased, and furthermore, dissolved oxygen is increased by electrostatic voltage conduction at a plurality of points in the supply pipe to the filter.

Further, the above-mentioned advanced organic matter separation filter
Another feature of the present invention is that the dissolved oxygen is further increased in water.

The sewage purification apparatus according to the present invention comprises:
A sewage receiving tank, a plurality of stages of electrostatic conductive pipes, an electrolysis tank, and a plurality of stages of electrostatic conductive pipes are connected in series to form a pretreatment device, and the pretreatment device is followed by a residue treatment filter and organic matter. A separation filter, a molecular separation filter, and an advanced organic matter separation filter are sequentially connected in series.

Further, a low voltage and a low current of a low frequency are applied to the electrostatic voltage conductive pipe, a stirrer is disposed in the sewage receiving tank and the electrolysis tank, and a supply pipe of pressurized air is provided in the electrolysis tank. It is also characterized by being connected.

Furthermore, the above-mentioned advanced organic matter separation filter
A plurality of stages of electrostatic voltage conductive pipes are connected to the downstream side.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings. In the figure, 1 is a sewage receiving tank, 2 is an electrolysis tank, 3 is a residue treatment filter, 4 is an organic matter separation filter, 5 is a molecular separation filter, and 6 is an advanced organic matter separation filter.

The sewage receiving tank 1 has an injection pipe 7 for injecting sewage such as river sewage, industrial wastewater, or sludge in an upper opening, and a stirring blade having a relatively slowly rotating blade at the bottom. An auxiliary machine 8 and a drain pipe 9 are provided, and a plurality of electromagnetic valves 10, 10,...

In the middle of the supply pipe 12 between the pump 11 connected to any one of the electromagnetic valves 10 and the electrolysis tank 2, a plurality of electrostatic voltage conductive pipes 13, 14, 1 are provided.
5, 16, etc. are connected in series. Although the supplied voltage, current, frequency and the like are somewhat different, the electrostatic voltage conductive pipes have substantially the same configuration. For example, as shown in FIG. Is wound and covered with a protective cover 19, and a desired low voltage and low current low frequency are supplied to the conductive coil 18 from a static voltage control box 20 by an electric wire 21 so that the conductive coil 18 is electrically conductive. It constitutes a pipe.

The electrolysis tank 2 has electrodes 23, to which a low voltage and a low current are supplied from an electrolysis controller 22,
23, a pressurized air supply pipe 24 at the top, a stirrer 25 having rotating blades that rotate relatively rapidly at the bottom, and a drain pipe 26, and a body at the bottom. .. Are provided with a plurality of stages of electromagnetic valves 27.

In the middle of the supply pipe 29 between the pump 28 connected to any of the electromagnetic valves 27 and the residue treatment filter 3, a plurality of electrostatic voltage conductive pipes 30,
31, 32, 33, etc. are connected in series. Although the supplied voltage, current, frequency, and the like are somewhat different, the electrostatic voltage conductive pipes have the same configuration, and thus constitute the electrostatic voltage conductive pipe as described above with reference to FIG. ing.

The above is an apparatus used for pretreatment of sewage. Hereinafter, a purification device using a filter device according to the present invention and an electro-static conductive pipe device for finishing the entirety to obtain drinking water as desired will be described in detail mainly with reference to FIG.

The residue treatment filter 3 is provided with a discharge pipe 36 having a large number of small holes 35 on the outer periphery in the center of a cylindrical case 34, and an olefin pipe around the discharge pipe 36. A filter 37 made of polymer, polyester fiber, and polyester non-woven fabric is wound and arranged. An upper end of the case 34 is connected to an end of the supply pipe 29. A connection pipe 38 is connected to the outlet of the discharge pipe 36, and a waste water pipe 39 is connected to the lower part of the discharge pipe 36, thereby forming a residue treatment filter 3.

The organic matter separation filter 4 has a sediment filter 41, 42 of approximately 5 microns disposed in the upper and lower portions of a cylindrical case 40.
A fibrous or granular activated carbon 43 is filled between the two.
The end of the connection pipe 38 is connected to the center of the lower part of the case 40, the waste water pipe 44 is connected to the lower part, and the connection pipe 45 is connected to the upper part of the case 40. Make up.

The molecular separation filter 5 is provided with a discharge pipe 48 having a large number of small holes 47 on the outer periphery at a central portion in a cylindrical case 46. A filter 49 made of a polyamide polymer film and a polysulfone film having a thickness of 0.0001 micron is wound and arranged. An end of the connection pipe 45 is connected to an upper part of the case 46, and a lower part of the case 46 is A connection pipe 50 is connected to the outlet of the central discharge pipe 48, and a wastewater pipe 51 is connected to the lower part thereof, thereby constituting a molecular separation filter 5.

In the advanced organic matter separation filter 6, sediment filters 53 and 54 of approximately 5 microns are arranged in the upper and lower portions of a cylindrical case 52.
A high-density fibrous or granular activated carbon 55 is filled between the casings 3 and 54.
The wastewater pipe 56 is connected to the end of the
A connection pipe 57 is connected to the upper part of the filter 52 to constitute a high organic matter separation filter-6.

The connection pipe 57 is connected at plural places with static voltage conductive pipes 58, 59 and the like in series. Although the supplied voltage, current, frequency, and the like are somewhat different, the electrostatic voltage conductive pipes have the same configuration, and thus constitute the electrostatic voltage conductive pipe as described above with reference to FIG. ing.

In the above configuration, when sewage such as river sewage, factory effluent, or sludge is injected from the injection pipe 7 into the upper opening of the sewage tank 1, the sewage enters the sewage tank 1. The water is stored up to a desired water level. During this time, the rotating blades of the impeller 8 at the bottom of the sewage receiving tank 1 are rotating relatively slowly, so that the sewage is stirred and the entanglement of the sewage between the sewage is released. Fluidity is imparted to the sewage, and the entangled sewage is separated and settled, and is discharged by opening the drain pipe 9 as appropriate.

Injection of sewage from the injection pipe 7 is continuously performed, and when the sewage in the sewage receiving tank 1 reaches a desired water level, an electromagnetic valve 10 adapted to the water level is opened, and sewage in the sewage receiving tank 1 is removed. The separated sewage provided with fluidity is supplied to a pump 11
Are sequentially sent to the supply pipe 12.

In the middle of the supply pipe 12, the electrostatic voltage conductive pipe 1
3, 14, 15, 16 and the like are connected in series. For example, the static voltage conductive pipe 13 is a circuit of DL-1 from the static voltage control box 20 and has a frequency of 50 Hz, a voltage of 1 V and a current of 1.8 mA. Low frequency, low voltage and low current are applied to the conductive pipe 14, and the frequency is 100Hz in the DL-2 circuit.
And a low frequency, low voltage and low current of voltage 1 V and current 1.8 mA, and the conductive pipe 15 has a frequency of 15 by a DL-3 circuit.
Low frequency, low voltage of 1 V and current of 3.6 mA at 0 Hz,
A low current, a low frequency, a low voltage, and a low current of 1 V and a current of 3.6 mA at a frequency of 200 Hz and a current of 3.6 mA, respectively, are applied to the conductive pipe 16 in a DL-4 circuit, thereby dissolving dissolved oxygen in sewage flowing through the pipe. increase. The frequency, voltage, and current are more severe depending on the degree of contamination of the wastewater to be sent.
The value tends to be higher, and the frequency is increased from 30 Hz to 2
50Hz, voltage 0.5V to 5V, current 0.8mA
Empirically selected within the range of 5 to 5 mA.

The sewage with increased dissolved oxygen enters the electrolysis tank 2 from the supply pipe 12, and the sewage is stirred by the relatively rapid rotation of the rotating blades of the stirring device 25 in the tank 2, and the sewage is intermixed with the sewage. The entanglement of the filth is further unraveled to impart fluidity to the sewage, and the electrolysis controller 22
For example, when a voltage of 100 V and a current of 10 A are supplied to the electrode 23, electrolysis is performed to collect dirt in the sewage, and pressurized air of, for example, 5 atm is supplied from a pressurized air supply pipe 24. Sewage is pressurized water. The separated dirt is discharged by opening the drain pipe 26 as appropriate. The voltage and current applied to the electrode 23 and the pressurization of the pressurized air tend to increase as the dirt gets worse depending on the degree of dirt in the sewage in the tank 2.
0V to 300V, current is 5A to 30A, and pressurized air is empirically selected within the range of 3 to 15 atm.

The pressurized sewage from which filth is separated in the electrolysis tank 2 and given fluidity is supplied to a supply pipe 29 via a pump 28.
Are sent in sequence. In the middle of the supply pipe 29, static voltage conductive pipes 30, 31, 32, 33 and the like are connected in series. For example, the static voltage conductive pipe 30 is connected to the static voltage control box 20 through the DL-5 circuit. Frequency 100
A low frequency, a low voltage and a low current of 2 V and a current of 5 mA in HZ, and a frequency of 15
At 0 Hz, a low frequency, a low voltage and a low current of 2 V and a current of 5 mA are applied to the conductive pipe 32.
A low frequency, a low voltage and a low current of 2 V and a current of 5 mA at 00 Hz, and a low frequency and a low voltage of a 2 V voltage and a current of 5 mA at a frequency of 250 Hz in a DL-8 circuit in the conductive pipe 33.
Low currents are each applied to increase the dissolved oxygen in the sewage flowing through the pipe. The frequency, voltage, and current are also selected by experience within the above ranges.

The sewage that has been subjected to the pretreatment by increasing the fluidity by removing the impurities, increasing the dissolved oxygen and increasing the water pressure as described above,
The filter 37 is sent from the supply pipe 29 to the filter 37 composed of an olefin polymer, polyester fiber, and polyester polymerized non-woven fabric of the residue treatment filter 3.
Then, sand, rust, water scale, fine particles having a size of about 5 μm or more are removed, and then sent to the connection pipe 38 from the outlet of the discharge pipe 36 at the lower center of the case 34. The residue such as sand by the filtration is discharged as waste liquid from the waste water pipe 39.

The sewage treated with the residue is passed through a connection pipe 38 to a sediment filter 4 of an organic matter separation filter 4.
While passing through the activated carbon 43, the water quality is improved by removing chlorine and odor, and organic substances are removed, and then sent to the connection pipe 45 through the sediment filter 42. Further, the removed organic substances and the like are discharged from the wastewater pipe 44 as a waste liquid.

The sewage treated with the organic matter is sent from the connection pipe 45 to a filter 49 made of a micron polyamide polymer membrane and a polysulfone membrane of the molecular separation filter 5 and filtered by the filter 49 to remove viruses and fine turbidity. Materials, colloidal substances, lime, radioactive substances, and inorganic salts such as arsenic are removed and sent to the connecting pipe 50 from the outlet pipe 48 at the lower center of the case 46. The molecules separated by the filtration are discharged from the wastewater pipe 51 as a waste liquid.

The sewage subjected to molecular separation is sent from the connection pipe 50 to the sediment filter 53 of the final advanced organic matter separation filter 6, and while passing through the activated carbon 55, removal of trace odors in the water and final organic matter Is removed and sent to the connecting pipe 57 through the sediment filter 54. Further, the removed organic substances and the like are discharged from the waste water pipe 56 as a waste liquid.

The water purified through the above-mentioned process becomes the waste water of the factory or other water used.

And, the advanced organic matter separation filter-6
When the water sent to the connecting pipe 57 is used as drinking water, the purified water is supplied to the electrostatic voltage conductive pipes 58 and 59 connected in series in the connecting pipe 57 as shown in FIG. Should be passed through. In this case, for example, the electrostatic voltage control pipe 20 is attached to the electrostatic voltage conductive pipe 58.
From the DL-9 circuit, a low frequency, low voltage and low current of 1 V voltage and 5 mA current at a frequency of 80 Hz are applied to the conductive pipe 59.
Is a DL-10 circuit with a frequency of 100Hz and a voltage of 1
When a low frequency, a low voltage and a low current of 5 V and a current of 5 mA are applied, the dissolved oxygen in the water flowing through the pipe is increased. The frequency, voltage, and current are also selected by experience within the above ranges.

As described above, sewage such as river sewage, factory effluent, or sludge-like sewage is increased in fluidity by pretreatment in which impurities are removed, dissolved oxygen is increased, and water pressure is increased. The filter, the organic matter separation filter, the molecular separation filter, and the advanced organic matter separation filter are sequentially flowed down, so that impurities are reliably trapped and eliminated to obtain purified water.

Then, the purified water becomes water suitable for drinking water by further increasing dissolved oxygen by electrostatic voltage conduction.

[0035]

As described above, according to the present invention, as a pretreatment, after removing impurities, increasing dissolved oxygen and increasing water pressure,
Since the residue treatment filter, organic matter separation filter, molecular separation filter, and advanced organic matter separation filter flow down sequentially, no extra burden is imposed on each filter, and even in highly contaminated sewage, impurities can be reliably captured. It can be removed to obtain the desired purified water.

Further, as the pretreatment, the entanglement of the sewage between the sewage is released by stirring in the sewage receiving tank to impart fluidity to the sewage, and the sewage is supplied to a plurality of points in the middle of the supply pipe to the electrolysis tank. To increase the amount of dissolved oxygen due to electrostatic potential conduction, and to further increase the fluidity of the wastewater by breaking the fine entanglement of the waste between the wastewater by supplying electricity and supplying compressed air in the electrolysis tank and stirring. In addition, in order to remove impurities and increase the pressure of sewage, and to increase dissolved oxygen by electrostatic voltage conduction at several points in the supply pipe to further filters, the burden on each subsequent filter Can be made lighter.

When the dissolved oxygen is further increased in the water from the advanced organic matter separation filter, drinking water having a high oxygen content can be obtained.

Also, a sewage receiving tank, a plurality of stages of electrostatic voltage conductive pipes, an electrolysis tank and a plurality of stages of electrostatic voltage conductive pipes are connected in series in order to constitute a pretreatment device. The treatment filter, organic matter separation filter, molecular separation filter, and advanced organic matter separation filter are connected in series, so that no extra burden is placed on each filter, and even impurities that are extremely dirty can be reliably trapped and eliminated. And a device for obtaining desired purified water can be effectively obtained.

Furthermore, a low voltage and a low current of a low frequency are applied to the electrostatic voltage conductive pipe, a stirrer is disposed in the sewage receiving tank and the electrolysis tank, and a supply pipe of pressurized air is provided in the electrolysis tank. When connected, the pre-processing is sufficiently performed to reduce the load on each subsequent filter.

Furthermore, when a plurality of stages of electrostatic voltage conducting pipes are connected downstream of the advanced organic matter separation filter,
An apparatus for obtaining purified water suitable as drinking water having a high oxygen content can be effectively obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an apparatus used for a method for obtaining purified water from wastewater according to the present invention.

FIG. 2 is an explanatory view of an electrostatic voltage conductive pipe that can be effectively used in the present invention.

FIG. 3 is an explanatory diagram of a filter device that can be effectively used in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sewage receiving tank 2 Electrolysis tank 3 Residue treatment filter 4 Organic matter separation filter 5 Molecular separation filter 6 Advanced organic matter separation filter 8,25 Stirrer 13,14,15,16 Static electricity conductive pipe 20 Static electricity control -Box 24 Pressurized air supply pipe 30, 31, 32, 33 Static voltage conductive pipe 58, 59 Static voltage conductive pipe

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshitoshi Maeda 1-2-2 Fujishirodai, Suita-shi, Osaka B2-307

Claims (6)

[Claims] In a method for purifying sewage by passing through a series of filters arranged in series, after removing impurities, increasing dissolved oxygen and increasing water pressure as a pretreatment, a residual treatment filter is provided. A method for purifying sewage, characterized by sequentially flowing down an organic matter separation filter, a molecular separation filter, and an advanced organic matter separation filter. 2. The pretreatment according to claim 1, wherein the sewage is entangled in the sewage receiving tank to disentangle the sewage and impart fluidity to the sewage. To increase the amount of dissolved oxygen due to electrostatic potential conduction, and to further increase the fluidity of the wastewater by breaking the fine entanglement of the waste between the wastewater by supplying electricity and supplying compressed air in the electrolysis tank and stirring. 2. The wastewater according to claim 1, wherein the impurities are removed and the pressure of the wastewater is increased, and furthermore, the dissolved oxygen is increased by electrostatic voltage conduction at a plurality of points in the supply pipe to the filter. How to get drinking water. 3. The method for purifying sewage according to claim 1, wherein the dissolved oxygen in the water from the advanced organic matter separation filter is further increased. 4. An apparatus for purifying sewage water by passing through a multistage filter arranged in series, wherein a sewage receiving tank, a plurality of stages of electrostatic voltage conductive pipes, an electrolysis tank, and a plurality of stages of electrostatic voltage conductive pipes are sequentially connected in series. Sewage, wherein a pretreatment device is constituted by connecting the pretreatment device, and a residue treatment filter, an organic matter separation filter, a molecular separation filter, and an advanced organic matter separation filter are sequentially connected in series following the pretreatment device. Purification equipment. 5. A low-frequency and low-current low frequency is applied to the electrostatic voltage conductive pipe, a stirrer is disposed in the sewage receiving tank and the electrolysis tank, and a supply pipe for pressurized air is provided in the electrolysis tank. The sewage purification apparatus according to claim 4, wherein the apparatus is connected. 6. An apparatus for purifying sewage water, wherein a plurality of stages of electrostatic voltage conductive pipes are further connected downstream of the advanced organic matter separation filter.