KR102376024B1 - Wastewater treatment equipment using complex-filter - Google Patents

Abstract

The present invention relates to a sewage and wastewater treatment device using a composite filter. The sewage and wastewater treatment device using the composite filter has a composite filter that can be used continuously for a long period of time and is reusable, and is equipped with a composite filter that can be used continuously for a long period of time and is reusable. By providing a reaction tank that can expand the reaction time and area with the filter, it is possible to achieve the useful effect of improving purification efficiency while reducing maintenance costs.

Description

Wastewater treatment equipment using complex-filter}

The present invention relates to a sewage and wastewater treatment device using a composite filter, and specifically, to a sewage and wastewater treatment device including a reaction tank with an intermediate wall to increase the reaction time of the sewage and wastewater and the composite filter in the sewage and wastewater treatment process. It's about processing equipment.

A safe and hygienic supply of drinking water is a necessity for human life. However, due to hydrological variability, pollution caused by climate change, and urbanization, many people are exposed to diseases caused by water shortage and poor sanitation. Air and soil pollution resulting from industrial development ultimately causes water pollution through point and non-point pollution sources. In addition, it has become more serious due to the rapid increase in excrement emissions due to the large-scale livestock and aquaculture industries. As the pollution of the water environment progresses, various environmental changes such as eutrophication and ecosystem destruction are occurring, and in order to solve these problems, movements regarding environmental regulations and environmental recovery are accelerating around the world.

In general, as a conventional domestic sewage and wastewater treatment method, physical treatment is a method of separating solids in sewage and wastewater from liquid by gravity or treating them by other physical methods, which has limitations in treatment, and chemical treatment involves the use of chemicals. Treatment costs are very high due to the increase in chemical costs and sludge generation due to treatment methods such as neutralization or pH adjustment by adding to sewage and wastewater, oxidation reduction, coagulation, precipitation, and adsorption. Sewage treatment using electrolysis also has high treatment costs. There is a problem. Accordingly, activated sludge methods using microorganisms are being developed, but there are problems in that the reliability of the nutrient removal rate by activated microorganisms is low and large-scale facilities are required to implement the conventional water treatment methods.

Accordingly, the industry is demanding the development of technology that can improve purification efficiency in sewage and wastewater treatment using microorganisms, have a prefabricated structure, make installation and operation convenient, and thereby reduce maintenance costs.

In addition to meeting these industry demands, it is a technology to improve the conventional sewage and wastewater treatment method using microorganisms. It primarily performs an oxidation-reduction reaction using a reaction tank with a built-in SM chip to improve the effect of wastewater treatment. Sewage and wastewater treatment technology has been disclosed.

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Republic of Korea Patent No. 10-1660512 Republic of Korea Patent No. 10-1682065

The present invention was developed in consideration of and to solve the above-described conventional problems, and its purpose is to provide a sewage and wastewater treatment device that can increase purification efficiency while reducing maintenance costs.

The present invention includes a microbial decomposition tank that filters sludge in raw water that is initially introduced and performs primary microbial decomposition by a composite filter filled therein; First, second and third reaction tanks for purifying the treated water treated in the pre-treatment unit with microorganisms filled in a composite filter filled therein; and an anoxic tank provided between the second and third reaction tanks, the inside of which is filled with a composite filter, and an anoxic state is formed inside to process nitrogen.
The microbial decomposition tank, the first reaction tank, the second reaction tank, the anoxic tank, and the third reaction tank include a cover portion installed with an inlet pipe and a nozzle to introduce wastewater and treated water that has undergone a pretreatment process and allow it to fall downward; An intermediate treatment stage that purifies the treated water flowing in from the cover with a composite filter inside, an air inlet that supplies oxygen to the inside of the intermediate treatment stage, and a plurality of hollows are formed to send the treated water downward, and the lower surface An intermediate processing unit provided with a perforated plate forming a; A lower treatment stage that purifies the water treated in the intermediate treatment unit by filling it with a composite filter, a sump that stores the purified treated water, and a pore made of porous metal through which the treated water passes from the lower treatment stage to the sump. It consists of a lower processing part including a metal plate,
a suspended matter removal tank that removes suspended substances and inorganic substances by screening the wastewater initially introduced before the microbial decomposition tank; In the wastewater treatment device, which includes a pretreatment tank for removing fine suspended substances and inorganic substances by administering a coagulant to the treated water from which suspended substances and inorganic substances have been removed,
The intermediate processing unit is provided with an intermediate wall that divides the interior of the intermediate processing unit to the left and right, and the upper or lower end of the intermediate wall is open,
The intermediate processing unit has two or more intermediate walls, each intermediate wall is parallel, and the two parallel intermediate walls are open at different positions,
The intermediate wall includes first, second and third spaces through the two intermediate walls, wherein the first space includes nitrogen-treated microorganisms, the second space includes sulfur-treated microorganisms, and the third space includes Includes nitrogen-processing microorganisms or sulfur-processing microorganisms,
The sulfur-treated microorganism includes any one or more of the KD-1212 strain and the DAH-1056 strain, and the nitrogen-treated microorganism includes any one or more of the Bacillus aryabhattai strain and the Vibrio neocaledonicus strain. Includes,
The intermediate wall is equipped with activated carbon or zinc oxide dispersed on one or both sides to remove toxic gases generated in the intermediate treatment section. When the activated carbon is used, it is mixed with ammonia or nitric acid and heat treated at a temperature of 100 to 200 ° C. It contains a nitrogen functional group on the surface of activated carbon,
The composite filter is composed of a porous foamed polymer made of one or more of polyvinyl acetal, polyurethane, and polystyrene, and the adsorption material of activated carbon and zeolite is dispersed in the polymer,
The porous foam polymer includes 5 to 9% by weight of a foamable polymer selected from the group consisting of polyvinyl acetal, polyurethane, and polystyrene, 5 to 9% by weight of an aldehyde compound, 72 to 88% by weight of water, activated carbon, and an adsorbent of zeolite powder. A wastewater treatment device using a composite filter containing 2 to 10% by weight and having a porosity of 85% or more is provided.

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According to the present invention, by providing a composite filter that can be used continuously for a long period of time and is reusable, and by providing a reaction tank that can expand the reaction time and area between sewage and wastewater and the composite filter, maintenance costs are reduced while purification efficiency is provided. Useful effects that can improve can be achieved.

In addition, according to the present invention, by controlling the pores of the composite filter of the intermediate treatment unit, it is possible to control the flow rate of raw water or treated water flowing into the intermediate treatment unit and minimize clogging due to sludge.

Figure 1 is a perspective view of a sewage and wastewater treatment device according to an embodiment of the present invention.
Figure 2 is a reference diagram of a cover portion according to an embodiment of the present invention.
Figure 3 is a reference diagram of an intermediate processing unit according to an embodiment of the present invention.
Figure 4 is a reference diagram of a lower processing unit according to an embodiment of the present invention.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings as follows. Through this detailed description, the purpose and configuration of the present invention and its characteristics will be better understood.

The present invention relates to a sewage and wastewater treatment device,

The processing device is,

A microbial decomposition tank that filters the sludge in the raw water that is initially introduced and performs primary microbial decomposition by a composite filter filled inside;

First, second and third reaction tanks for purifying the treated water treated in the pre-treatment unit with microorganisms filled in a composite filter filled therein; and

It consists of an anoxic tank provided between the second and third reaction tanks, the inside of which is filled with a composite filter, and an anoxic state is formed inside to process nitrogen,

The microbial decomposition tank, the first reaction tank, the second reaction tank, the anoxic tank, and the third reaction tank include a cover portion installed with an inlet pipe and a nozzle to introduce wastewater and treated water that has undergone a pretreatment process and allow it to fall downward;

An intermediate treatment stage that purifies the treated water flowing in from the cover with a composite filter inside, an air inlet that supplies oxygen to the inside of the intermediate treatment stage, and a plurality of hollow holes are formed to send the treated water downward, and a lower part. An intermediate treatment unit comprising a perforated plate forming a surface and an intermediate wall configured to divide the interior of the intermediate treatment unit to the left and right, wherein the upper or lower end of the intermediate wall is open. and

A lower treatment stage that purifies the water treated in the intermediate treatment unit by filling it with a composite filter, a sump that stores the purified treated water, and a pore made of porous metal through which the treated water passes from the lower treatment stage to the sump. It consists of a lower processing part including a metal plate,

The composite filter is composed of a porous foam polymer made of one or more of polyvinyl acetal, polyurethane, and polystyrene, and activated carbon and zeolite powder are dispersed in the polymer, and aerobic microorganisms are activated on the outside through a redox reaction. It provides a sewage and wastewater treatment device characterized in that anaerobic microorganisms are activated inside.

Figure 1 is a perspective view of a sewage and wastewater treatment device according to an embodiment of the present invention, which will be described in detail below with reference to Figure 1.

The wastewater treatment device of the present invention includes a microbial decomposition tank (10) that filters sludge in raw water that is initially introduced and performs primary microbial decomposition by a composite filter filled therein ; A first reaction tank (20), a second reaction tank (30), and a second reaction tank (20), which purify the treated water treated in the microbial decomposition tank (10) with microorganisms attached to a complex filter filled inside and activated by a redox reaction. 3 reaction tank (50); And an anoxic tank (40) located between the second reaction tank (30) and the third reaction tank (50) , filled with a composite filter inside , and treating nitrogen by making the inside an anoxic state.

The present invention consists of a microbial digestion tank (10), a first reaction tank (20), a second reaction tank (30), an anoxic tank (40), and a third reaction tank (50) in that order, and the digestion tank (10) The interior of the first reaction tank (20), the second reaction tank (30), the anoxic tank (40), and the third reaction tank (50) is filled with a composite filter. Although not shown, a screen device is used as a pretreatment facility before the microbial decomposition tank. A suspended matter removal tank is provided to remove suspended substances and minerals using a screen; And it may further include a pretreatment tank for removing fine suspended solids and inorganic substances using a coagulant.

Figure 2 is a reference diagram of the cover part 60 according to an embodiment of the present invention, Figure 3 is a reference diagram of the intermediate processing unit 70 according to an embodiment of the present invention, and Figure 4 is an embodiment of the present invention. The device will be described in detail below with reference to FIGS. 2 to 4 as a reference diagram of the lower processing unit 80 according to an example.

The microbial decomposition tank 10, the first reaction tank 20, the second reaction tank 30, the anoxic tank 40, and the third reaction tank 50 are equipped with a cover 62, an inlet pipe 64, and a nozzle to provide raw water. and a cover part 60 that introduces treated water that has completed the pre-treatment process and causes it to fall downward; An intermediate treatment stage (72) that purifies the treated water flowing in from the cover part (60) with a complex filter inside, an air inlet (not shown) that supplies oxygen into the intermediate treatment stage (72), and a lower part. It is provided with a porous plate 76 forming the lower surface and forming a plurality of hollow holes to send the treated water to the bottom, and an intermediate wall provided to divide the interior of the intermediate treatment stage to the left and right, and the top or bottom of the intermediate wall is open (open). ) an intermediate processing unit 70 in the form of; and a lower treatment stage 82 that purifies the treated water treated in the intermediate treatment unit 70 by filling a complex filter therein , a collection well 84 that stores the purified treated water, and the lower treatment stage 82. It consists of a lower treatment unit 80 including a porous metal plate 86 made of porous metal through which treated water passes from ) to the water collection well 84.

When the inlet pipe of the cover part is provided with a middle wall of the intermediate treatment section, the inlet pipe formed on the left side of the intermediate treatment section is used to allow the treated water in the intermediate treatment section to move smoothly along the middle wall. In addition, the nozzle of the cover part uses a helicoil nozzle (spiral nozzle) 66 to widely spray raw water and treated water downward.

Specifically, the intermediate processing unit may have two or more intermediate walls, and each intermediate wall may be parallel, and the two parallel intermediate walls may be open at different positions. For example, when two intermediate walls are provided, one intermediate wall is formed downward from the cover and has an open lower end to allow treated water to move to the next space, and the other intermediate wall is formed at the bottom of the intermediate treatment section. It is formed upward from the surface and is open at the top to allow treated water to move to the next space. In this way , by forming an intermediate wall within the intermediate treatment unit, the reaction time and reaction area between the inflow treated water and the composite filter increase, thereby improving purification efficiency.

The intermediate wall may be provided by dispersing activated carbon or zinc oxide on one or both sides. When using the activated carbon, it may be mixed with ammonia or nitric acid and heat treated at a temperature of 100 to 200° C. to include a nitrogen functional group on the surface of the activated carbon. By dispersing activated carbon or zinc oxide as described above in the intermediate wall, toxic gases generated in the intermediate treatment section can be removed.

In addition, the intermediate treatment unit is divided into three or more spaces by an intermediate wall. At this time, the types of microorganisms included in each space may be different, and the microorganisms may be nitrogen-treated microorganisms or sulfur-treated microorganisms. Specifically, when it is composed of two intermediate walls, it includes first, second, and third space parts, wherein the first space part contains nitrogen-treated microorganisms, the second space part contains sulfur-treated microorganisms, and the third space part contains the sulfur-treated microorganisms. It may include nitrogen-treated microorganisms or sulfur-treated microorganisms , and vice versa.

The sulfur-treated microorganism includes any one or more of the KD-1212 strain and the DAH-1056 strain, and the nitrogen-treated microorganism includes any one or more of the Bacillus aryabhattai strain and the Vibrio neocaledonicus strain. Includes.

Generally, in order to remove nitrogen and sulfur contained in sewage and wastewater, microorganisms must be placed in different reaction tanks, but by including an intermediate wall, there is an advantage that nitrogen and sulfur can be treated simultaneously in one reaction tank .

The composite filter is composed of a porous foamed polymer made of one or more of polyvinyl acetal, polyurethane, and polystyrene, and activated carbon and zeolite are dispersed in the polymer , and the porous foamed polymer is exposed to the outside through a redox reaction. Aerobic microorganisms are activated, anaerobic microorganisms are activated inside, and aerobic and anaerobic bacteria grow at the outlet to treat sludge.

Specifically, the porous foam polymer includes 5 to 9% by weight of a foamable polymer selected from the group consisting of polyvinyl acetal, polyurethane, and polystyrene, 5 to 9% by weight of an aldehyde compound, 72 to 88% by weight of water, activated carbon, and zeolite powder. It is manufactured by mixing and heating and melting 2 to 10% by weight of adsorbed substances and soluble substances, and has a porosity of 85% or more or 90% or more.

By using the porous foamed polymer as described above, the overall pressure loss of the composite filter can be reduced and the performance of the composite filter can be improved by increasing the attachment of microorganisms and the mass transfer rate into the polymer. In addition, it can be used continuously for a long period of time, more than 10 years, and can be washed and reused, which has the advantage of reducing the maintenance cost of the treatment device.

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The activated carbon may be sulfur-bound activated carbon prepared by mixing sulfur and activated carbon in a ratio of 4-6:6-4 and heat-treating the mixture at a temperature of 100-200°C.

Including the activated carbon, it is excellent at removing nitrogen, phosphorus, and coloring.

Additionally, the composite filter may have pores of 50㎛ to 10mm, 100㎛ to 10mm, or 100㎛ to 5mm.

A composite filter can be provided at the upper and lower portions of the intermediate treatment section, and by controlling the pores of the composite filter, the flow rate of raw water or treated water flowing into the intermediate treatment section can be controlled and clogging due to sludge can be minimized.

The air inflow path (not shown) is located above the intermediate treatment unit 70 and the lower treatment unit 80, and the air inflow path starting from the outside is formed higher than the internal inflow path to prevent treated water from being discharged to the outside. Additionally, it is preferable not to configure the air inflow path in an anoxic tank.

The edge of the intermediate treatment stage 72 and the lower treatment stage 82 where the assembly means 78 is not installed is treated water stored in the sump through the inside of each intermediate treatment stage 72 and the lower treatment stage 82. A discharge pipe 90 that sends to the top is connected and installed.

The water collection well (84) has a porous partition installed on one side of the interior, has a discharge part (88), and discharges treated water through a discharge pipe (90) located in the discharge part (88).

The discharge part 88 is located at a lower position than the water collection well 84, and the partition is a porous partition or a hydrophilic polymer membrane selected from hydrophilic regenerated cellulose, cellulose acetate (CA), and polyvinyl alcohol (PVA). It can be done.

The porous metal plate 86 may be made of Inconel metal, which is a porous metal mixed with nickel, chromium, iron, carbon, and manganese, or a general metal film may be used.

The material of the frame forming the microbial decomposition tank (10), the first reaction tank (20), the second reaction tank (30), the anoxic tank (40), and the third reaction tank (50) is manufactured by mixing shell powder and polyethylene or polypropylene. It is made of synthetic resin.

The synthetic resin, which is the material that makes up each of the above groups, is made by washing the shells of oysters or cockles with distilled water at least three times, drying them, powdering them, heating them to 60-70°C, treating the surface with a surfactant to lower the surface polarity, and making it polyethylene or polypropylene. It is produced by mixing and injection molding in a 1:1 ratio. In addition, it can be manufactured by additionally adding dolomite and activated silica sand.

The sewage and wastewater treatment device according to the present invention purifies sewage and wastewater by filling the inside of each tank with a composite filter containing aerobic and anaerobic bacteria, thereby increasing purification efficiency and minimizing sludge generation, providing additional sludge treatment. There is no need for equipment, so it can be installed in a small space and maintenance costs can be reduced.

The above description relates to specific embodiments of the present invention, but the embodiments according to the present invention are disclosed for illustrative purposes and are not to be understood as limiting the scope of the present invention, and those skilled in the art It should be understood that various changes and modifications can be made to the disclosed embodiments without departing from the essence of the present invention. Accordingly, all such modifications and changes may be understood as falling within the scope of the invention disclosed in the patent claims or equivalents thereof.

10: microbial digestion tank, 20: first reaction tank, 30: second reaction tank
40: anoxic tank, 50: third reaction tank,
60: cover part, 62: cover, 64: inlet pipe, 66: helicoil nozzle
70: intermediate processing unit, 72: intermediate processing stage,
74: intermediate wall, 76: perforated plate
80: lower processing unit, 82: lower processing stage
84: sump, 86: porous metal plate, 88: discharge part
90: discharge pipe

Claims (5)

A microbial decomposition tank that filters the sludge in the raw water that is initially introduced and performs primary microbial decomposition by a composite filter filled inside; First, second and third reaction tanks for purifying the treated water treated in the pre-treatment unit with microorganisms filled in a composite filter filled therein; and an anoxic tank provided between the second and third reaction tanks, the inside of which is filled with a composite filter, and an anoxic state is formed inside to process nitrogen.
The microbial decomposition tank, the first reaction tank, the second reaction tank, the anoxic tank, and the third reaction tank include a cover portion installed with an inlet pipe and a nozzle to introduce wastewater and treated water that has undergone a pretreatment process and allow it to fall downward; An intermediate treatment stage that purifies the treated water flowing in from the cover with a composite filter inside, an air inlet that supplies oxygen to the inside of the intermediate treatment stage, and a plurality of hollows are formed to send the treated water downward, and the lower surface An intermediate processing unit provided with a perforated plate forming a; A lower treatment stage that purifies the water treated in the intermediate treatment unit by filling it with a composite filter, a sump that stores the purified treated water, and a pore made of porous metal through which the treated water passes from the lower treatment stage to the sump. It consists of a lower processing part including a metal plate,
a suspended matter removal tank that removes suspended substances and inorganic substances by screening the wastewater initially introduced before the microbial decomposition tank; In the wastewater treatment device, which includes a pretreatment tank for removing fine suspended substances and inorganic substances by administering a coagulant to the treated water from which suspended substances and inorganic substances have been removed,
The intermediate processing unit is provided with an intermediate wall that divides the interior of the intermediate processing unit to the left and right, and the upper or lower end of the intermediate wall is open,
The intermediate processing unit has two or more intermediate walls, each intermediate wall is parallel, and the two parallel intermediate walls are open at different positions,
The intermediate wall includes first, second and third spaces through the two intermediate walls, wherein the first space includes nitrogen-treated microorganisms, the second space includes sulfur-treated microorganisms, and the third space includes Includes nitrogen-processing microorganisms or sulfur-processing microorganisms,
The sulfur-treated microorganism includes any one or more of the KD-1212 strain and the DAH-1056 strain, and the nitrogen-treated microorganism includes any one or more of the Bacillus aryabhattai strain and the Vibrio neocaledonicus strain. Includes,
The intermediate wall is equipped with activated carbon or zinc oxide dispersed on one or both sides to remove toxic gases generated in the intermediate treatment section. When the activated carbon is used, it is mixed with ammonia or nitric acid and heat treated at a temperature of 100 to 200 ° C. It contains a nitrogen functional group on the surface of activated carbon,
The composite filter is composed of a porous foam polymer made of one or more of polyvinyl acetal, polyurethane, and polystyrene, and activated carbon and zeolite are dispersed in the polymer,
The porous foam polymer includes 5 to 9% by weight of a foamable polymer selected from the group consisting of polyvinyl acetal, polyurethane and polystyrene, 5 to 9% by weight of an aldehyde compound, 72 to 88% by weight of water, activated carbon and zeolite powder 2 to 10%. A wastewater treatment device using a composite filter containing % by weight and having a porosity of 85% or more. delete delete delete delete