Oil and wastewater treatment apparatus using ultra-hydrophilic polymer porous filter, and oil and wastewater treatment system comprising same

Abstract

An oil and wastewater treatment apparatus using an ultra-hydrophilic polymer porous filter, according to one embodiment of the present disclosure, comprises: a housing formed in a three-dimensional shape extending in the plane direction and the height direction and having an open top; an ultra-hydrophilic polymer porous filter, which is formed of a porous base material having a plurality of pores formed therein or on the surface thereof, is disposed inside the housing, and is formed in a three-dimensional shape extending in the plane direction and the height direction such that an inner space is formed; and a cover disposed on the upper portion of the housing so as to cover the top of the housing, and detachably coupled to the housing, wherein the cover can have: an inlet allowing communication with the inside of the housing from the outside of the ultra-hydrophilic polymer porous filter; a first outlet allowing communication with the inside of the housing in the inner space of the ultra-hydrophilic polymer porous filter; and a second outlet allowing communication with the inside of the housing at a position spaced apart from the inlet outside the ultra-hydrophilic polymer porous filter.

Description

Oil and wastewater treatment device using an extremely hydrophilic polymer porous filter and an oil and wastewater treatment system including the same

[0001] The present disclosure relates to an oil and wastewater treatment device using an extremely hydrophilic polymer porous filter and an oil and wastewater treatment system including the same.

[0002] Water pollution caused by industrial wastewater containing large amounts of oil and oil discharged from ships due to accidents has a devastating impact on ecosystems, and the restoration of contaminated areas requires enormous economic costs and time. For this reason, technology to separate water and oil from wastewater and marine oil spills is required.

[0003] One method for separating water and oil is the specific gravity separation method, which utilizes the difference in density to separate the water that sinks from the oil that rises after a certain period. According to this method, the water that sinks to the bottom and the oil that rises to the top can maintain a high level of purity; however, without reinforcement devices using specific structures, the purity remains low. In particular, the wastewater at the boundary between water and oil is barely separated, leading to persistent difficulties such as the proliferation of microorganisms caused by the concealed oil, resulting in foul odors, and the associated costs of treating this wastewater. Additionally, the spatial and temporal limitations of having to wait a long time for separation to occur can also be considered a problem with the specific gravity separation method.

[0004] Another method is an adsorption method that selectively absorbs only oil using an adsorbent. The adsorption method has a limited capacity for removing oil at a time, and additional costs and secondary environmental pollution may occur during the disposal process of the adsorbent that has absorbed the oil.

[0005] To address the problems of these conventional methods for separating water and oil, hydrophilic or lipophilic filters may be used for treating oil wastewater. However, methods using filters also have limitations, such as low separation performance, frequent replacement cycles, and inconvenience. Furthermore, it is difficult to expect oil reuse due to the water contained in the oil, and the problem of water pollution caused by oil-containing water remains an issue that needs to be resolved. Additionally, there are risks associated with the acidic solutions used in the surface treatment process of hydrophilic or lipophilic filter substrates, as well as issues regarding the consumption of significant time and energy in the etching and plasma treatment processes.

[0006] (Patent Document 1) Republic of Korea Registered Patent No. 10-2049150

[0007] One objective of the present disclosure is to provide an oil wastewater treatment device using an ultra-hydrophilic polymer porous filter capable of separating oil and water from continuously supplied oil wastewater without waiting time.

[0008] In addition, the purpose is to provide an oil wastewater treatment system capable of separating oil and water with stable separation efficiency and increasing treatment capacity by including multiple oil wastewater treatment devices.

[0009] However, the technical problems that this embodiment aims to solve are not limited to the technical problems described above, and other technical problems may exist.

[0010] A wastewater treatment device using an extremely hydrophilic polymer porous filter according to one embodiment of the present disclosure comprises: a housing formed in a three-dimensional shape extending in a planar direction and a height direction and having an open top surface; an extremely hydrophilic polymer porous filter formed from a porous substrate having a plurality of pores formed inside or on the surface, disposed inside the housing and formed in a three-dimensional shape extending in the planar direction and the height direction to form an internal space; and a cover disposed on the upper part of the housing to cover the top surface of the housing and detachably coupled to the housing, wherein the cover may have an inlet communicating from the outside of the extremely hydrophilic polymer porous filter to the inside of the housing, a first outlet communicating from the internal space of the extremely hydrophilic polymer porous filter to the inside of the housing, and a second outlet communicating from the outside of the extremely hydrophilic polymer porous filter to the inside of the housing at a position spaced apart from the inlet.

[0011] A wastewater treatment system including a wastewater treatment device according to one embodiment of the present disclosure may include a wastewater treatment device, a wastewater supply source connected to the cover to supply wastewater to the housing through the inlet, a water-soluble liquid tank connected to the cover to collect a water-soluble liquid through the first outlet, and a fat-soluble liquid tank connected to the cover to collect a fat-soluble liquid through the second outlet.

[0012] According to one embodiment of the present disclosure, by enabling the separation of continuously supplied oil wastewater into oil and water without waiting time, the proliferation of microorganisms is reduced and the generation of odors is prevented.

[0013] In addition, according to one embodiment of the present disclosure, oil wastewater can be separated into oil and water to a recyclable level, thereby preventing environmental pollution and contributing to a circular economy by reusing resources.

[0014] In addition, according to one embodiment of the present disclosure, the pressure inside the oil wastewater treatment device is appropriately maintained by automatic control, thereby enabling the separation of oil wastewater into oil and water with stable separation efficiency, and the lifespan is maximized by appropriately maintaining the performance of the ultra-hydrophilic polymer porous filter and the oil wastewater treatment device.

[0015] FIG. 1 is a flowchart of a method for manufacturing an extremely hydrophilic polymer porous substrate having a micro-nano fiber-type composite structure according to one embodiment of the present disclosure.

[0016] FIG. 2 is a schematic diagram of a method for manufacturing an extremely hydrophilic polymer porous substrate having a micro-nano fiber-type composite structure according to one embodiment of the present disclosure.

[0017] FIG. 3a is a magnified microscope image of a porous substrate prior to performing plasma treatment according to one embodiment of the present disclosure.

[0018] FIG. 3b is a magnified microscope image of a porous substrate prior to performing plasma treatment according to one embodiment of the present disclosure.

[0019] FIG. 4a is a magnified microscope image of a porous substrate after performing plasma treatment according to one embodiment of the present disclosure.

[0020] FIG. 4b is a magnified microscope image of a porous substrate after performing plasma treatment according to one embodiment of the present disclosure.

[0021] FIG. 5 is a graph of the contact angle with water on the surface of a porous substrate at different locations depending on whether plasma etching is performed according to one embodiment of the present disclosure.

[0022] FIG. 6 is a graph showing the time change of the contact angle with water on the surface of a porous substrate at different locations depending on whether plasma etching is performed according to one embodiment of the present disclosure.

[0023] FIG. 7 is a graph showing the time change of the contact angle with water depending on whether coating is performed with a polymer coating solution according to one embodiment of the present disclosure.

[0024] FIG. 8 is a schematic diagram of a filter for treating wastewater according to one embodiment of the present disclosure.

[0025] FIG. 9 is a perspective view of a wastewater treatment device according to one embodiment of the present disclosure.

[0026] FIG. 10 is a top view of a wastewater treatment device with the cover removed according to one embodiment of the present disclosure.

[0027] FIG. 11 is a configuration diagram of a wastewater treatment system including a wastewater treatment device according to one embodiment of the present disclosure.

[0028] FIG. 12 is a configuration diagram of a wastewater treatment system including a wastewater treatment device according to another embodiment of the present disclosure.

[0029] FIG. 13 is a configuration diagram of a wastewater treatment system including a plurality of wastewater treatment devices according to one embodiment of the present disclosure.

[0030] FIG. 14 is a diagram showing the configuration of a flow distributor according to one embodiment of the present disclosure.

[0031] This invention is a study conducted with research funding from the Ministry of Trade, Industry and Energy and the Korea Institute of Industrial Technology Planning and Evaluation (KEIT) in 2024 (Project No. 20013794).

[0032] Embodiments of the present invention are described below with reference to the attached drawings to enable those skilled in the art to easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0033] Throughout this specification, when a component is described as being located "on" another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components.

[0034] Throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0035] Throughout this specification, terms of degree such as “about,” “substantially,” etc., are used to mean at or near the stated value when inherent manufacturing and material tolerances are presented in the stated meaning, and are used to prevent unscrupulous infringers from unfairly exploiting the disclosure in which precise or absolute values ​​are mentioned to aid in understanding this specification. Throughout this specification, terms of degree such as “step” or “step of” do not mean “step for”.

[0036] Throughout this specification, the term “combination(s) of these” included in the Markush-type expression means one or more mixtures or combinations selected from the group consisting of the components described in the Markush-type expression, and means including one or more selected from the group consisting of said components.

[0037] Throughout this specification, the description "A and / or B" means "A or B, or A and B".

[0038] Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the attached drawings. However, the present invention may not be limited to these embodiments and examples and drawings.

[0039] FIG. 1 is a flowchart (100) of a method for manufacturing an extremely hydrophilic polymer porous substrate (400) having a micro-nano fiber type composite structure according to one embodiment of the present disclosure. FIG. 2 is a schematic diagram of a method for manufacturing an extremely hydrophilic polymer porous substrate (400) having a micro-nano fiber type composite structure according to one embodiment of the present disclosure.

[0040] Referring to FIGS. 1 and 2, a method for manufacturing an extremely hydrophilic polymer porous substrate (400) having a micro-nano fiber type composite structure according to one embodiment may include the steps of: preparing a porous substrate (200) having a plurality of pores formed inside or on the surface (110); performing plasma etching to form a microstructure or a nanostructure on the porous substrate (200) (130); and / or coating the porous substrate (300) on which plasma etching has been performed with a polymer coating solution to impart extreme hydrophilicity (150).

[0041] In the step (110) of preparing a porous substrate (200) according to one embodiment, a porous substrate (200) having a plurality of pores formed therein or on the surface through which fluid can flow may be prepared. In one embodiment, in order to separate water so as to be reusable from wastewater containing an emulsion, the pores of the porous substrate (200) may be 5 microns or larger and 200 microns or smaller.

[0042] A porous substrate (200) according to one embodiment may be a polymer substrate comprising at least one of polypropylene, polytetrafluoroethylene, and polyethylene.

[0043] A porous substrate (200) according to one embodiment may include at least one of a nonwoven fabric, a fabric, a sponge, and a fiber.

[0044] The step (110) of preparing a porous substrate (200) according to one embodiment may include the step of preparing a porous substrate (200) that is formed in a three-dimensional shape extending in the planar direction and the height direction, and has an internal space formed in at least a part thereof.

[0045] According to one embodiment, the porous substrate (200) may have a uniform thickness from the internal space to the surface exposed to the outside on at least one side. In one embodiment, the internal space of the porous substrate (200) is formed in a shape corresponding to the shape of the porous substrate (200), so that the thickness between the internal space on one side of the porous substrate (200) may be uniform. Accordingly, the thickness of the porous substrate (200) may be greater than a certain thickness to allow a portion of the wastewater (e.g., water-soluble liquid) to pass between the surface of the porous substrate (200) and the internal space.

[0046] A porous substrate (200) according to one embodiment has a cylindrical shape with a circular cross-section extending in the height direction, and a through hole may be formed in which at least a portion of the interior is penetrated in the height direction. In one embodiment, the thickness between the bottom surface of the cylindrical porous substrate (200) and the bottom surface of the internal space formed by the through hole may be uniform, and the thickness between the side surface of the porous substrate and the side surface of the internal space formed by the through hole may be uniform.

[0047] In one embodiment, the porous substrate (200) was described as having a cylindrical shape with a through hole formed inside, but the shape of the porous substrate (200) is not limited to the illustrated example and can be applied in various shapes.

[0048] A porous substrate (200) according to another embodiment may have a two-dimensional shape extended in a planar direction.

[0049] In the step (130) of performing plasma etching according to one embodiment, a microstructure or a nanostructure can be formed on a porous substrate (200).

[0050] In one embodiment, the step of performing plasma etching may be to perform plasma treatment on a porous substrate (200) in a mixed gas of oxygen (O₂) and difluorocarbene (CF₄) or a mixed gas of oxygen (O₂) and tetrafluoromethane (CF₄).

[0051] In one embodiment, by controlling the conditions and / or processing time of the plasma etching process, a composite structure in which various types of microstructures and / or nanostructures are combined can be formed on a porous substrate (200).

[0052] For example, plasma treatment can be performed in a power range of 100W to 1000W. For example, plasma treatment can be performed in a treatment time of 3 minutes to 30 minutes.

[0053] FIGS. 3a and 3b are enlarged microscope images of a porous substrate (200) before performing plasma treatment according to one embodiment of the present disclosure. FIGS. 4a and 4b are enlarged microscope images of a porous substrate (300) after performing plasma treatment according to one embodiment of the present disclosure.

[0054] Figures 3a, 3b, 4a, and 4b are scanning electron microscope (SEM) images, magnified to units of 100 μm, 10.0 μm, 1.00 μm, and 3.00 μm, respectively.

[0055] Referring further to FIGS. 3a, 3b, 4a, and 4b, the step (130) of performing plasma etching according to one embodiment may include the step of performing reactive-ion etching (RIE) using a double electrode on a porous substrate (200) using an etching gas including oxygen (O₂) gas.

[0056] Reactive ion etching is an etching method that combines physical impact and chemical reaction by making a gas into a plasma state and using an upper electrode and a lower electrode to collide the gas in the plasma state with a porous substrate (200). For example, reactive ions (e.g., fluorine) in the etching gas can be collided with the porous substrate (200).

[0057] In one embodiment, the reactive ion etching process may be performed through a device comprising a stage in which a workpiece is installed inside a vacuum chamber, a gas introduction means for introducing an etching gas into a vacuum chamber in a vacuum atmosphere, a plasma generation means for generating a plasma that ionizes the introduced etching gas inside the vacuum chamber, and a high-frequency power source connected to the stage via an output line to apply a bias potential to the workpiece. In one embodiment, high-frequency power of different frequencies may be supplied to a first electrode (inner electrode) and a second electrode (outer electrode) installed in a state of mutual insulation on the stage using two high-frequency power sources.

[0058] In one embodiment, in the step (130) of performing plasma etching, reactive ion etching using a dual electrode can be performed on the porous substrate (200) for 5 minutes at a power of 300W. Accordingly, a nano-structure (nano-web) of 50nm to 100nm can be formed on the porous substrate (300).

[0059] In one embodiment, a porous substrate (300) may have hydroxyl groups (OH) activated on its surface as plasma etching is performed.

[0060] A porous substrate (300) according to one embodiment may have increased extreme hydrophilicity on its surface as plasma etching is performed. For example, the porous substrate to which plasma etching is performed may have a contact angle with water reduced to 1 degree or less.

[0061] In the step (150) of coating with a polymer coating solution according to one embodiment, a polymer coating layer having hydrophilicity can be formed on a porous substrate (300) that has undergone plasma etching.

[0062] The step (150) of coating with a polymer coating solution according to one embodiment may include the step (153) of immersing a porous substrate (300) in a crosslinking solution containing bisacrylamide, and / or the step (157) of drying the porous substrate while heating it.

[0063] In one embodiment, the crosslinking solution may be a solution in which at least one of N,N'-methylene bisacrylamide and N,N'-ethylene bisacrylamide is dissolved together with ammonium persulfate.

[0064] In the step (153) of immersing a porous substrate (300) in a crosslinking solution according to one embodiment, a hydrophilic polymer coating layer can be formed by crosslinking bisacrylamides to each other on the composite structure of the porous substrate (300). In one embodiment, the crosslinking agent used for the polymer coating may include N,N'-methylene bisacrylamide and N,N'-ethylene bisacrylamide, etc. In one embodiment, the porous substrate may be immersed in a crosslinking solution in which bisacrylamide and ammonium persulfate are dissolved at a concentration of 2:3 so as to be completely wetted.

[0065] In the step (157) of heating and drying the porous substrate (300) according to one embodiment, the porous substrate (300) can be dried in an oven at 80 to 100 degrees. In one embodiment, a cross-linking polymerization reaction can be performed by heating and drying the porous substrate (300) within one hour.

[0066] In one embodiment, a polymer coating may be performed to impart extreme hydrophilicity to the porous substrate (300). For example, the porous substrate (300) may be completely soaked in a coating solution in which N,N'-methylene bisacrylamide is dissolved at a concentration of 50 mM to 100 mM, or in which N,N'-ethylene bisacrylamide is dissolved at a concentration of 75 mM to 150 mM. For example, the porous substrate (300) may be dried in a 90-degree oven for 1 hour. Accordingly, the porous substrate (400) may be secured with wettability such that the contact angle with water is 1 degree or less.

[0067] Accordingly, the porous substrate (400) according to one embodiment may have a micro-nano fiber type composite structure and a hydrophilic coating layer. Specifically, the porous substrate (400) and the filter for treating oil wastewater using the same are given surface roughness and the chemical properties of the surface are controlled so that the water-soluble liquid (e.g., water) contained in the oil wastewater can be selectively and rapidly discharged to effectively separate oil.

[0068] According to a porous substrate (400) according to one embodiment, oil particles of tens to hundreds of microns in size that are trapped in an emulsion form in a water-soluble liquid are removed as they pass through the micro-nano structure of the three-dimensional porous substrate, and the separation efficiency can be very high enough to allow the separated water-soluble liquid to be recycled. The porous substrate (400) according to one embodiment can form an extremely hydrophilic to superoleophobic surface layer in water that allows only the water-soluble liquid to pass through and selectively separates only the oil. In particular, the oil content of the water-soluble liquid that passes through a filter for treating oil wastewater using a porous substrate according to one embodiment can be within 100 ppm and have a high purity of 99.99% or more.

[0069] FIG. 5 is a graph of the contact angle (CONTACT ANGLE) of the surface of a porous substrate at a specific location (SURFACE ANGLE) depending on whether plasma etching is performed according to one embodiment of the present disclosure. FIG. 6 is a graph of the change in time of the contact angle (CONTACT ANGLE) of the surface of a porous substrate at a specific location depending on whether plasma etching is performed according to one embodiment of the present disclosure.

[0070] Referring to FIGS. 5 and 6, the contact angle with water and changes over time on the surface of a porous substrate at different locations (SURFACE ANGLE) depending on whether plasma etching was performed were compared. The contact angle with water may be proportional to the penetration rate of the polymer coating solution. Here, the porous substrate may have a three-dimensional shape extended in the planar direction and the height direction.

[0071] As shown in Fig. 5, in the case of a porous substrate (Only coating) that has been coated only with a polymer coating solution without performing plasma etching, the contact angle with water in the outer region is low, confirming that hydrophilicity is secured to some extent. However, the contact angle with water in the middle region and inner region is significantly high, confirming that hydrophilicity is not secured.

[0072] In contrast to this, in the case of a porous substrate (Plasma w / coating) that has undergone plasma etching and coating with a polymer coating solution, the contact angle with water is low not only in the outer region but also in the middle and inner regions, confirming that extreme hydrophilicity can be secured on the surface of the entire porous substrate.

[0073] As shown in Fig. 6, in the case of a porous substrate coated only with a polymer coating solution without performing plasma etching, it can be observed that the contact angle with water gradually decreases over time. In particular, it can be observed that the contact angle with water decreases relatively quickly in the outer region of the porous substrate.

[0074] However, it can be observed that the contact angle with water decreases relatively slowly in the middle and inner regions of the porous substrate, and does not decrease further even after a long time. In other words, in the case of a porous substrate coated only with a polymer coating solution without performing plasma etching, it can be seen that the polymer coating process takes a long time, and coating is impossible up to the middle and inner regions, making it difficult to secure hydrophilicity.

[0075] In contrast, for a porous substrate (Plasma w / coating) that has undergone plasma etching and coating with a polymer coating solution, it can be confirmed that the contact angle with water is significantly reduced in a very short time (within 10 sec) not only in the outer region but also in the middle and inner regions. In other words, for a porous substrate (Plasma w / coating) that has undergone plasma etching and coating with a polymer coating solution, it can be confirmed that the polymer coating is completed quickly and hydrophilicity can be secured even in the middle and inner regions.

[0076] Conventional coating methods using only hydrophilic materials without plasma surface treatment require multiple immersion and annealing steps, which consumes a large amount of chemicals and raises safety concerns. In addition, conventional hydrophilic material coating methods have the disadvantage that they are difficult to apply to porous substrates with three-dimensional shapes due to the viscosity of the coating agent. The method for manufacturing an ultra-hydrophilic polymer porous substrate according to one embodiment utilizes a wet coating method after plasma etching, thereby having the advantage of a simple coating process with a single coating step and relatively low chemical usage.

[0077] FIG. 7 is a graph showing the change in the contact angle with water over time depending on whether coating is performed with a polymer coating solution according to one embodiment of the present disclosure.

[0078] Referring to Figure 7, the time during which extreme hydrophilicity of a porous substrate is maintained at room temperature was compared depending on whether it is coated with a polymer coating solution. Here, extreme hydrophilicity was confirmed by the contact angle with water.

[0079] In the case of a porous substrate that has not been coated with a polymer coating solution after plasma etching (Plasma w / o coating), it can be observed that the contact angle with water begins to increase after 6 days from the manufacture of the porous substrate, and increases rapidly after 8 days. In other words, it can be confirmed that the hyperhydrophilicity lifespan of a porous substrate that has not been coated with a polymer coating solution after plasma etching (Plasma w / o coating) is very short, approximately 8 days.

[0080] In contrast to this, in the case of a porous substrate coated with a polymer coating solution after plasma etching (Plasma w / coating), the contact angle with water may be similar to that of a porous substrate not coated with a polymer coating solution after plasma etching (Plasma w / o coating) from the time of manufacture of the porous substrate until day 6.

[0081] However, in the case of a porous substrate coated with a polymer coating solution after plasma etching (Plasma w / coating), it can be confirmed that the contact angle with water remains constant even after a period of time. In other words, it can be confirmed that the lifespan of extreme hydrophilicity at room temperature is extended for a porous substrate coated with a polymer coating solution after plasma etching (Plasma w / coating).

[0082] A porous substrate according to one embodiment is manufactured by a combination of plasma etching and wet coating processes, so it can have a strong bonding force between the polymer substrate surface and the hydrophilic coating layer. A hydrophilic filter substrate using only the plasma etching method without a conventional hydrophilic polymer coating has the limitation of losing its hydrophilic properties within a few days in air and having to be stored in water. However, a porous substrate according to one embodiment has excellent durability and can maintain extreme hydrophilicity semi-permanently.

[0083] According to a method for manufacturing an extremely hydrophilic polymer porous substrate having a micro-nano fiber-type composite structure according to one embodiment, the wettability of the porous substrate can be temporarily increased by hydroxyl groups (OH) generated through plasma treatment used as a surface treatment and pretreatment. Accordingly, due to the high wettability of the porous substrate, the coating agent can penetrate evenly into the porous substrate of a three-dimensional shape, thereby drastically reducing the immersion time of the coating agent.

[0084] FIG. 8 is a schematic diagram of a filter (800) for treating wastewater according to one embodiment of the present disclosure.

[0085] Referring to FIG. 8, a filter (800) for treating wastewater according to one embodiment is formed in a three-dimensional shape extending in the planar direction and the height direction, and an internal space (810) may be formed in at least a part.

[0086] In one embodiment, the filter (800) for treating oily wastewater may have a uniform thickness from the internal space (810) to the surface exposed to the outside. In one embodiment, the internal space (810) of the filter (800) for treating oily wastewater is formed in a shape corresponding to the shape of the filter (800) for treating oily wastewater, so that the thickness between the inside of the wastewater treatment device and the internal space (810) may be uniform.

[0087] A filter (800) for treating wastewater according to one embodiment has a cylindrical shape with a circular cross-section extended in the height direction, and a through hole formed through in the height direction. In one embodiment, the thickness (t) between the side of the filter (800) for treating wastewater which has a through-hole shape and the outer surface of the internal space (810) formed by the through hole may be uniform.

[0088] A wastewater treatment system according to one embodiment supplies wastewater to the outside of a wastewater treatment filter (800) and can separate a water-soluble liquid (e.g., water) filtered into the inside of the wastewater treatment filter (800).

[0089] In one embodiment, the external surface of the wastewater treatment filter (800) may be exposed to wastewater, and at least a portion of the wastewater may pass through the wastewater treatment filter (800) by a pressure difference, thereby allowing a water-soluble liquid to be filtered into the internal space (810) of the wastewater treatment filter (800).

[0090] In one embodiment, the water-soluble liquid filtered into the internal space (810) of the wastewater treatment filter (800) can be extracted through a pipe and separated into a reservoir (20).

[0091] In another embodiment, wastewater may be supplied into the wastewater treatment filter (800), and filtered water may be separated out of the wastewater treatment filter (800).

[0092] In one embodiment, the height of the filter (800) for treating wastewater may be a preset height (H), and the preset height (H) may be set to be equal to or greater than the internal height of the housing as described below.

[0093] FIG. 9 is a perspective view of a wastewater treatment device (900) according to one embodiment of the present disclosure. FIG. 10 is a top view of a wastewater treatment device (900) with the cover (920) removed according to one embodiment of the present disclosure.

[0094] Referring to FIGS. 9 and 10, a wastewater treatment device (900) according to one embodiment may include a housing (910), an extremely hydrophilic polymer porous filter (800) and / or a cover (920).

[0095] A housing (910) according to one embodiment is formed in a three-dimensional shape extending in the planar direction and the height direction, and the top surface may be open.

[0096] In one embodiment, the housing (910) may be in the shape of a cylinder with a circular cross-section extending in the height direction. In one embodiment, the upper surface of the housing (910) may be open and connected by a cover (920) described later to partition the internal space.

[0097] An extremely hydrophilic polymer porous filter (800) according to one embodiment may be formed from a porous substrate having a plurality of pores formed inside or on the surface. In one embodiment, the extremely hydrophilic polymer porous filter (800) may be formed from an extremely hydrophilic polymer porous substrate (400) having a micro-nano fiber type composite structure, which is manufactured by performing plasma etching to form a microstructure or a nanostructure on a porous substrate according to the manufacturing method described above, and by immersing a porous substrate in a crosslinking solution containing bisacrylamide in which hydroxyl groups (OH) are generated by plasma etching to improve wettability, and by drying the porous substrate while heating.

[0098] In one embodiment, the extremely hydrophilic polymer porous filter (800) may be compressible by applying pressure.

[0099] In one embodiment, the hyperhydrophilic polymer porous filter (800) may have a cylindrical shape with a circular cross-section extended in the height direction. In one embodiment, the hyperhydrophilic polymer porous filter (800) may be formed to have a circular cross-section that is arranged concentrically with the circular cross-section of the housing (910) and has a relatively small size. Accordingly, the hyperhydrophilic polymer porous filter (800) may be maintained inside the housing (910) at a constant distance from the inner surface of the housing (910).

[0100] According to one embodiment, the extremely hydrophilic polymer porous filter (800) may be formed in a three-dimensional shape extending in the planar direction and the height direction so as to be placed inside the housing (910) and to form an internal space (810). In one embodiment, the extremely hydrophilic polymer porous filter (800) may have an internal space (810) formed by an internal hole that is indented in the height direction from at least a portion of the upper part. In one embodiment, the internal space (810) of the extremely hydrophilic polymer porous filter (800) may be open upward through the internal hole, and the internal hole may be blocked downward so as not to extend to the lower surface of the extremely hydrophilic polymer porous filter (800).

[0101] In one embodiment, the ultra-hydrophilic polymer porous filter (800) may have a thickness from the inner space (810) to the lower surface and a thickness to the outer surface that is greater than a predetermined thickness.

[0102] In one embodiment, the wastewater flowing into the interior of the housing (910) may flow into the extremely hydrophilic polymer porous filter (800), and a water-soluble liquid filtered through the outer or lower surface of the extremely hydrophilic polymer porous filter (800) may flow into the internal space (810) of the extremely hydrophilic polymer porous filter (800). In one embodiment, the oil-soluble liquid contained in the wastewater may not pass through the extremely hydrophilic polymer porous filter (800) and may be separated from the upper part of the wastewater outside the extremely hydrophilic polymer porous filter (800).

[0103] In one embodiment, based on the ultra-hydrophilic polymer porous filter (800) inside the housing (910), a water-soluble liquid can be discharged from the internal space (810) of the ultra-hydrophilic polymer porous filter (800), and an oil-soluble liquid can be discharged from the outside of the ultra-hydrophilic polymer porous filter (800).

[0104] A cover (920) according to one embodiment is positioned on the upper part of the housing (910) to cover the upper surface of the housing (910) and can be detachably coupled to the housing (910). In one embodiment, the cover (920) can be detachably coupled to the housing (910) on the upper part of the housing (910), and accordingly, the space inside the housing (910) can be partitioned while coupled to the housing (910), and the upper surface of the housing (910) can be opened when detached from the housing (910).

[0105] According to one embodiment, the extremely hydrophilic polymer porous filter (800) may be formed such that the height extending in the height direction is greater than the height between the inner lower surface of the housing (910) and the inner upper surface of the cover (920) when the housing (910) and the cover (920) are combined. Accordingly, the extremely hydrophilic polymer porous filter (800) may be pressed in the height direction by the combination of the housing (910) and the cover (920).

[0106] In one embodiment, the extremely hydrophilic polymer porous filter (800) may be configured to be pressed by the combination of the housing (910) and the cover (920) so as to be in close contact with the inner lower surface of the housing (910) and the inner upper surface of the cover (920). In one embodiment, the extremely hydrophilic polymer porous filter (800) may be in close contact with the inner upper surface of the cover (920) by applying pressure in the height direction so that the inner hole does not communicate directly with the interior of the housing (910).

[0107] In a cover (920) according to one embodiment, an inlet (923) communicating from the outside of the ultra-hydrophilic polymer porous filter (800) to the inside of the housing (910), a first outlet (925) communicating from the inside space (810) of the ultra-hydrophilic polymer porous filter (800) to the inside of the housing (910), and a second outlet (927) communicating from the outside of the ultra-hydrophilic polymer porous filter (800) to the inside of the housing (910) at a position spaced apart from the inlet (923) may be formed.

[0108] In one embodiment, the cover (920) may be connected to the wastewater supply source (11) through an inlet (923), and wastewater may be supplied from the wastewater supply source (11) into the interior of the housing (910) through an inlet pipe (930) connected to the inlet (923). In one embodiment, the inlet (923) may be connected from the exterior of the hydrophilic polymer porous filter (800) to the interior of the housing (910) so that the wastewater supplied into the interior of the housing (910) flows into the exterior of the hydrophilic polymer porous filter (800). In one embodiment, the inlet (923) may be formed so as to be located on the circumferential outer side of the cross-section of the hydrophilic polymer porous filter (800) in the circularly formed cover (920).

[0109] In one embodiment, the cover (920) may be connected to a water-soluble liquid tank (12) configured to collect a water-soluble liquid through a first outlet (925), and a water-soluble liquid (e.g., water) separated from wastewater inside the housing (910) may be discharged into the water-soluble liquid tank (12) through a first outlet pipe (950) connected to the first outlet (925). In one embodiment, the first outlet (925) may be connected to the interior of the housing (910) in the internal space (810) of an ultra-hydrophilic polymer porous filter (800) formed by an internal hole.

[0110] In one embodiment, the cover (920) may be connected to a fat-soluble liquid tank (13) configured to collect a fat-soluble liquid through a second outlet (927), and a fat-soluble liquid (e.g., oil) separated from wastewater inside the housing (910) may be discharged into the fat-soluble liquid tank (13) through a second outlet pipe (970) connected to the second outlet (927). In one embodiment, the second outlet (927) may be connected to the inside of the housing (910) from the outside of the ultra-hydrophilic polymer porous filter (800).

[0111] In one embodiment, the second outlet (927) may be formed at a position spaced apart from the inlet (923). In one embodiment, the second outlet (927) may be located circumferentially outward from the cross-section of the polymer porous filter in the circularly formed cover (920).

[0112] In one embodiment, the second outlet (927) may be located circumferentially outward from the cross-section of the polymer porous filter in the circularly formed cover (920) and on the opposite side of the inlet (923). In one embodiment, the first outlet (925) may be located circumferentially inward from the inlet (923) and / or the second outlet (927) in the circularly formed cover (920).

[0113] According to one embodiment, the inlet (923) may be bent and extended to one side so as to be connected to the wastewater supply source (11) from the cover (920). According to one embodiment, the first outlet (925) may be bent and extended to the other side so as to be connected to the water-soluble liquid tank (12) from the cover (920). In one embodiment, the inlet (923) and the first outlet (925) may be formed by being bent in opposite directions, so that the water-soluble liquid among the wastewater introduced from one side can be discharged to the other side.

[0114] According to one embodiment, the second outlet (927) is connected to an extension pipe (980) that extends upward at a preset height from the cover (920) and can be connected to an oil-soluble liquid tank (13) through the extension pipe (980). Accordingly, even if a vortex is generated in the wastewater flowing into the interior of the housing (910) through the inlet (923), only the oil-soluble liquid separated at the top of the wastewater can be discharged upward through the extension pipe (980), thereby improving the separation efficiency of the oil-soluble liquid.

[0115] In one embodiment, the extension tube (980) formed in the cover (920) may be formed to be adjustable in height. In one embodiment, the extension tube (980) may be formed in a structure in which its length in the height direction can be adjusted by manual operation by a user.

[0116] A cover (920) according to one embodiment may further include an opening / closing valve (990) configured to allow or block the flow of fluid through an extension tube (980) manually or automatically. In one embodiment, the opening / closing valve (990) is provided in the extension tube (980) to allow or block the flow of an oil-soluble liquid through the extension tube (980).

[0117] In one embodiment, the opening and closing valve (990) can be operated manually by a user to open or close, and can be automatically controlled to open or close by a controller (19) as described below.

[0118] According to one embodiment, the cover (920) may further include a first pressure sensor (15) configured to sense the pressure inside the housing (910) or the pressure inside the extension tube (980). As described below, the opening and closing valve (990) may be automatically controlled to open or close based on the pressure inside the housing (910) or the pressure inside the extension tube (980) sensed by the first pressure sensor (15).

[0119] FIG. 11 is a diagram showing the configuration of a wastewater treatment system (10) including a wastewater treatment device (900) according to one embodiment of the present disclosure.

[0120] Referring to FIG. 11, a wastewater treatment system (10) including a wastewater treatment device (900) according to one embodiment may include a wastewater treatment device (900), a wastewater supply source (11) connected to a cover (920) to supply wastewater to a housing (910) through an inlet (923), a water-soluble liquid tank (12) connected to a cover (920) to collect a water-soluble liquid through a first outlet (925), and / or a fat-soluble liquid tank (13) connected to a cover (920) to collect a fat-soluble liquid through a second outlet (927).

[0121] A wastewater supply source (11) according to one embodiment can store wastewater internally and continuously supply wastewater to a wastewater treatment device (900). For example, the wastewater supply source (11) may be a water tank or a tank.

[0122] In one embodiment, the wastewater supply source (11) may be connected to the wastewater treatment device (900) through an inlet pipe (930) connected to an inlet port (923) formed in the cover (920). In one embodiment, the inlet pipe (930) may be equipped with a pump (933) that generates pressure to allow the wastewater to flow into the wastewater treatment device (900).

[0123] In one embodiment, the inlet pipe (930) may be equipped with a second pressure sensor (935) configured to sense the pressure inside the inlet pipe (930). A controller (19) according to one embodiment may control the operation of the pump (933) based on the pressure inside the inlet pipe (930) sensed by the second pressure sensor (935).

[0124] A water-soluble liquid tank (12) according to one embodiment may be a tank configured to collect water-soluble liquid separated and discharged from inside the housing (910) of a wastewater treatment device (900) by connecting to a cover (920) through a first outlet (925).

[0125] In one embodiment, the water-soluble liquid tank (12) may be connected to the oil wastewater treatment device (900) through a first outlet pipe (950) connected to a first outlet (925). In one embodiment, the water-soluble liquid separated from the oil wastewater treatment device (900) may be continuously discharged through the first outlet pipe (950).

[0126] In one embodiment, the first outlet pipe (950) may be provided with a control valve (955) configured to control the flow rate of fluid through the first outlet pipe (950). In one embodiment, the control valve (955) is kept open at all times so that a separated water-soluble liquid can continuously flow through the first outlet pipe (950).

[0127] In one embodiment, the control valve (955) can sense the flow rate of the fluid flowing into the first outlet pipe (950) in real time and transmit the sensed data to the controller (19).

[0128] A fat-soluble liquid tank (13) according to one embodiment may be a tank configured to collect a fat-soluble liquid separated and discharged from inside the housing (910) of a wastewater treatment device (900) by connecting to a cover (920) through a second outlet (927).

[0129] In one embodiment, the oil-soluble liquid tank (13) may be connected to the oil wastewater treatment device (900) through a second outlet pipe (970) connected to a second outlet (927). In one embodiment, the oil-soluble liquid separated from the oil wastewater treatment device (900) may be discharged intermittently through the second outlet pipe (970).

[0130] According to one embodiment, the second outlet (927) is connected to an extension pipe (980) that extends upward from the cover (920) at a preset height and can be connected to an oil-soluble liquid tank (13) through the extension pipe (980). In one embodiment, the oil-soluble liquid discharged from the oil wastewater treatment device (900) through the second outlet (927) to the extension pipe (980) can be discharged to the oil-soluble liquid tank (13) through the second outlet pipe (970).

[0131] In one embodiment, the second outlet pipe (970) may be equipped with an opening / closing valve (990) configured to allow or block the flow of fluid through the extension pipe (980) manually or automatically.

[0132] A controller (19) according to one embodiment includes at least one processor and at least one memory including computer program code, and the at least one memory and computer program code can control the operation of a specific configuration of a wastewater treatment system (10) through at least one processor.

[0133] A first pressure sensor (15) according to one embodiment can sense the pressure inside the housing (910) or the pressure inside the extension tube (980).

[0134] A controller (19) according to one embodiment can control the opening and closing of the opening and closing valve (990) based on the pressure sensed by the first pressure sensor (15).

[0135] In one embodiment, the controller (19) can discharge the oil-soluble liquid separated from the housing (910) of the oil wastewater treatment device (900) into the oil-soluble liquid tank (13) through the second outlet (927), extension pipe (980), and second outlet pipe (970) by opening the shut-off valve (990) when the pressure sensed by the first pressure sensor (15) is greater than or equal to a preset reference pressure.

[0136] In one embodiment, the controller (19) can block the discharge of the oil-soluble liquid through the second outlet (927), the extension pipe (980), and the second outlet pipe (970) by closing the shut-off valve (990) when the pressure sensed by the first pressure sensor (15) is less than a preset reference pressure. In one embodiment, with the shut-off valve (990) closed, the pressure can gradually increase as the oil-soluble liquid accumulates inside the housing (910) of the oil wastewater treatment device (900). Accordingly, the oil-soluble liquid inside the oil wastewater treatment device (900) can be maintained within a specified volume range.

[0137] In one embodiment, the shut-off valve (990) can sense the flow rate of the fluid flowing into the second outlet pipe (970) in real time and transmit the sensed data to the controller (19).

[0138] In another embodiment, the shut-off valve (990) can be manually opened and closed by a user. For example, the user can monitor the oil-soluble liquid accumulating inside the housing (910) of the oil wastewater treatment device (900) and manually open the shut-off valve (990) to discharge the oil-soluble liquid into the oil-soluble liquid tank (13) through the second outlet (927), the extension pipe (980), and the second outlet pipe (970).

[0139] A wastewater treatment system (10) including a wastewater treatment device (900) according to one embodiment may further include a cleaning liquid source (16) connected to a cover (920) to supply cleaning liquid to a housing (910) through an inlet (923), and a switching valve (17) configured to selectively connect the wastewater source (11) and the cleaning liquid source (16) to the inlet (923).

[0140] According to one embodiment, the cleaning liquid source (16) may be a tank that stores cleaning liquid inside. In one embodiment, the wastewater source (11) and the cleaning liquid source (16) may be connected to an inlet pipe (930) through a switching valve (17) and may be connected to an inlet (923) of a wastewater treatment device (900). In one embodiment, the pump (933) may be positioned downstream of the switching valve (17) from the inlet pipe (930) so that there is no need to provide a separate pumping means for the cleaning liquid source (16).

[0141] In one embodiment, the wastewater supply source (11) can be connected to the inlet (923) by the operation of the switching valve (17), and accordingly, wastewater can be supplied to the wastewater treatment device (900) through the inlet (923). At this time, the switching valve (17) can block the connection with the cleaning liquid supply source (16).

[0142] In one embodiment, the cleaning liquid supply source (16) can be connected to the inlet (923) by the operation of the switching valve (17), and accordingly, the cleaning liquid can be supplied to the wastewater treatment device (900) through the inlet (923). At this time, the switching valve (17) can block the connection with the wastewater supply source (11).

[0143] In one embodiment, the wastewater treatment system (10) can clean the interior of the housing (910) and the highly hydrophilic polymer porous filter (800) by supplying a cleaning solution to the wastewater treatment device (900) through the inlet (923).

[0144] In one embodiment, the operation of the switching valve (17) can be automatically controlled by a controller (19). In one embodiment, the controller (19) can supply the cleaning solution to the oil and wastewater treatment device (900) by controlling the operation of the switching valve (17) based on a signal received from the outside, a periodic operation signal, or a sensing result through a sensor. Accordingly, the performance of oil and water separation can be maintained by cleaning the ultra-hydrophilic polymer porous filter (800).

[0145] In another embodiment, the operation of the switching valve (17) can be manually operated by the user.

[0146] FIG. 12 is a configuration diagram of a wastewater treatment system (10) including a wastewater treatment device (900) according to another embodiment of the present disclosure.

[0147] Referring further to FIG. 12, a wastewater treatment system (10) according to another embodiment may further include a buffer tank (975) and an opening / closing valve (990).

[0148] A buffer tank (975) according to one embodiment is positioned between the second outlet (927) and the oil-soluble liquid tank (13) and can receive the oil-soluble liquid discharged through the second outlet (927). In one embodiment, the buffer tank (975) may be positioned to extend in the height direction (e.g., the direction of gravity).

[0149] In one embodiment, the buffer tank (975) has a relatively small space formed inside and can temporarily receive a fat-soluble liquid that is discharged through the second outlet (927) and discharged through the second outlet pipe (970).

[0150] An opening / closing valve (990) according to one embodiment is positioned between a buffer tank (975) and a fat-soluble liquid tank (13) and can manually or automatically allow or block the flow of fluid through an extension pipe (980).

[0151] In one embodiment, when the shut-off valve (990) is open, the oil-soluble liquid discharged through the second outlet (927) can be discharged through the second outlet pipe (970) and through the buffer tank (975) to the oil-soluble liquid tank (13). In one embodiment, when the shut-off valve (990) is closed, the flow of the oil-soluble liquid through the second outlet pipe (970) can be blocked.

[0152] In one embodiment, the oil-soluble liquid temporarily stored inside the buffer tank (975) may contain some water-soluble liquid (e.g., water), and the water-soluble liquid may be separated inside the buffer tank (975) due to a difference in density. For example, inside the buffer tank (975), the water-soluble liquid may be separated by sinking below the oil-soluble liquid due to a difference in density. In particular, oil-water separation inside the buffer tank (975) may occur while the flow of the oil-soluble liquid through the second outlet pipe (970) is blocked. Accordingly, the purity and separation performance of the oil-water separation may be improved.

[0153] FIG. 13 is a configuration diagram of a wastewater treatment system (10) including a plurality of wastewater treatment devices (900) according to one embodiment of the present disclosure.

[0154] Referring to FIG. 13, a wastewater treatment system (10) according to one embodiment may include a plurality of wastewater treatment devices (900).

[0155] The wastewater treatment device (900) included in the wastewater treatment system (10) according to one embodiment may be composed of a plurality of units and may further include a flow distributor (14) configured to regulate the flow rate to the plurality of wastewater treatment devices (900).

[0156] A flow distributor (14) according to one embodiment is positioned between a wastewater supply source (11) and a plurality of wastewater treatment devices (900), and can distribute wastewater evenly to the plurality of wastewater treatment devices (900).

[0157] For example, when oil and wastewater supplied from an oil and wastewater supply source (11) is simultaneously connected to multiple oil and wastewater treatment devices (900), the flow rate of the oil and wastewater supplied to each oil and wastewater treatment device (900) may differ. Accordingly, a problem may arise in which the oil and water separation efficiency and performance of the oil and wastewater treatment devices (900) differ from one another. To solve this problem, the flow distributor (14) can distribute the oil and wastewater evenly to multiple oil and wastewater treatment devices (900).

[0158] In one embodiment, the flow distributor (14) may have a suitable capacity set based on the flow rate supplied from the wastewater supply source (11) (e.g., a flow rate range if variable).

[0159] A wastewater treatment system (10) according to one embodiment may further include a plurality of shut-off valves (940) configured to selectively block wastewater supplied to a plurality of wastewater treatment devices (900), each disposed between a flow distributor (14) and a plurality of treatment devices.

[0160] In one embodiment, a plurality of shut-off valves (940) may be provided in each of the inlet pipes (930) of a plurality of oil and wastewater treatment devices (900). In one embodiment, the controller (19) may selectively block the flow of oil and wastewater supplied to each oil and wastewater treatment device (900) by individually controlling the plurality of shut-off valves (940). In another embodiment, the plurality of shut-off valves (940) may be manually operated by a user.

[0161] In one embodiment, as the shut-off valve (940) is opened, oil wastewater is supplied to the corresponding oil wastewater treatment device (900) so that the oil-soluble liquid and the water-soluble liquid can be separated, and as the shut-off valve (940) is closed, the supply of oil wastewater to the corresponding oil wastewater treatment device (900) can be cut off. In one embodiment, maintenance or repair work can be performed on the oil wastewater treatment device (900) while the supply of oil wastewater is cut off. For example, the oil wastewater treatment device (900) can clean the ultra-hydrophilic polymer porous filter (800) by supplying a cleaning solution while the supply of oil wastewater is cut off.

[0162] Accordingly, the wastewater treatment system (10) can set the number of wastewater treatment devices (900) so that maintenance or repair work on a specific wastewater treatment device (900) can be performed without stopping wastewater treatment.

[0163] For example, the wastewater treatment system (10) may include a plurality of wastewater treatment devices (900) corresponding to the flow rate of wastewater supplied from a wastewater supply source (11), and may also include a reserve wastewater treatment device (900). In one embodiment, the reserve wastewater treatment device (900) may not be supplied with wastewater during normal operation, but may be supplied with wastewater only when maintenance or repair work is performed on a specific wastewater treatment device (900).

[0164] FIG. 14 is a diagram showing the configuration of a flow distributor (14) according to one embodiment of the present disclosure.

[0165] Referring to FIG. 14, a flow distributor (14) according to one embodiment may be designed such that the length between a distribution inlet (143) connected to a wastewater supply source (11) and a plurality of distribution outlets (147) each connected to a plurality of wastewater treatment devices (900) is constant so that the flow rate of wastewater is evenly distributed to a plurality of wastewater treatment devices (900).

[0166] In one embodiment, the distribution inlet (143) of the flow distributor (14) may be connected to the wastewater supply source (11) through an inlet pipe (930) equipped with a pump (933). In one embodiment, a plurality of distribution outlets (147) of the flow distributor (14) may be connected to the inlets (923) of a plurality of wastewater treatment devices (900) through an inlet pipe (930).

[0167] In one embodiment, the flow distributor (14) may be configured to evenly distribute the flow of wastewater to a plurality of connected wastewater treatment devices (900). In one embodiment, the flow distributor (14) may be extended to be evenly branched into a plurality of distribution outlets (147).

[0168] In one embodiment, as shown in FIG. 14, the flow distributor (14) may be a two-port distributor having a Y shape.

[0169] In one embodiment, the flow distributor (14) may consist of a plurality of distributors connected in series. For example, as shown in FIG. 14, the flow distributor (14) may consist of two Y-shaped 2-port distributors connected in series, which are evenly distributed into four (2 x 2 = 4) distribution outlets (147). Accordingly, the design of the flow distributor (14) can be easy, while simultaneously having excellent flow distribution performance.

[0170] In another embodiment, the flow distributor (14) may be a distributor with three or four or more ports. In another embodiment, the flow distributor (14) may be a plurality of distributors with three or four or more ports connected in series.

[0171] In the above-described wastewater treatment system (10), the wastewater treatment method may also be implemented in the form of a computer program stored on a computer-readable recording medium that is executed by a computer, or in the form of a recording medium containing instructions that can be executed by a computer. Additionally, in the above-described wastewater treatment system (10), the wastewater treatment method may also be implemented in the form of a computer program stored on a computer-readable recording medium that is executed by a computer.

[0172] A computer-readable recording medium may be any available medium accessible by a computer and includes both volatile and non-volatile media, and both removable and inremovable media. Additionally, a computer-readable recording medium may include a computer storage medium. A computer storage medium includes both volatile and non-volatile, removable and inremovable media implemented by any method or technique for storing information such as computer-readable instructions, data structures, program modules, or other data.

[0173] The functions realized by the components described herein may be implemented in a general-purpose processor, a specific-purpose processor, an integrated circuit, an Application Specific Integrated Circuit (ASIC), a Central Processing Unit (CPU), a circuit, and / or a combination thereof, which are programmed to realize the described functions. A processor may include transistors or other circuits and is considered to be a circuit or a processing circuit. A processor may be a programmed processor that executes a program stored in memory.

[0174] In this specification, circuits, parts, units, and means are hardware programmed to perform or execute the described functions. Such hardware may be any hardware disclosed in this specification or any hardware known to be programmed or execute the described functions.

[0175] If the hardware is a processor considered to be a circuit type, the circuit, the part, means, or unit is a combination of the hardware and the software used to constitute the hardware and / or processor.

[0176] The foregoing description of the present disclosure is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present disclosure. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0177] The scope of the present disclosure is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present disclosure.

Claims

1. In an oil and wastewater treatment device using an extremely hydrophilic polymer porous filter, A housing formed in a three-dimensional shape extending in the planar and height directions, with an open top surface; An ultra-hydrophilic polymer porous filter formed from a porous substrate having a plurality of pores formed inside or on the surface, disposed inside the housing, and formed in a three-dimensional shape extending in the planar direction and the height direction to form an internal space; and It includes a cover disposed on the upper part of the housing to cover the upper surface of the housing and detachably coupled to the housing. The above cover is formed with an inlet communicating from the outside of the ultra-hydrophilic polymer porous filter to the inside of the housing, a first outlet communicating from the internal space of the ultra-hydrophilic polymer porous filter to the inside of the housing, and a second outlet communicating from the outside of the ultra-hydrophilic polymer porous filter to the inside of the housing at a position spaced apart from the inlet. Wastewater treatment device.

2. In Paragraph 1, The above housing is in the shape of a cylinder with a circular cross-section extending in the height direction, and The above-described hyperhydrophilic polymer porous filter is a cylindrical shape with a circular cross-section extending in the height direction, and has an internal space formed by an internal hole that is indented from the top in the height direction, at least a portion thereof. Wastewater treatment device.

3. In Paragraph 1, The above-described hyperhydrophilic polymer porous filter is manufactured by a process comprising: performing plasma etching to form microstructures or nanostructures on the porous substrate; immersing the porous substrate, in which hydroxyl groups (OH) are generated by the plasma etching and wettability is improved, in a crosslinking solution containing bisacrylamide; and coating the porous substrate with a polymer coating solution comprising drying the porous substrate while heating. Wastewater treatment device.

4. In Paragraph 1, The first outlet above is connected to a water-soluble liquid tank configured to collect a water-soluble liquid, and The second outlet above is connected to a fat-soluble liquid tank configured to collect a fat-soluble liquid, Wastewater treatment device.

5. In Paragraph 4, The above inlet is bent to one side and extended so as to be connected to a wastewater supply source from the above cover, and The first outlet is bent and extended to the other side from the cover to be connected to the water-soluble liquid tank, and The second outlet is connected to an extension pipe extending upward from the cover at a preset height, and is connected to the oil-soluble liquid tank through the extension pipe. Wastewater treatment device.

6. In Paragraph 5, The apparatus further comprises an opening and closing valve configured to allow or block the flow of fluid through the extension tube, either manually or automatically. Wastewater treatment device.

7. In Paragraph 1, The above-described hyperhydrophilic polymer porous filter is configured to be compressible by pressure, and is formed such that the height extended in the height direction is greater than or equal to the height between the inner lower surface of the housing and the inner upper surface of the cover. The above-described hyperhydrophilic polymer porous filter is configured to be pressed by the combination of the housing and the cover and to adhere to the inner upper surface of the cover. Wastewater treatment device.

8. In a wastewater treatment system comprising the wastewater treatment device of claim 1, The above wastewater treatment device; A wastewater supply source connected to the cover to supply wastewater to the housing through the inlet; A water-soluble liquid tank connected to the cover to collect the water-soluble liquid through the first outlet; The invention includes a fat-soluble liquid tank connected to the cover to collect the fat-soluble liquid through the second outlet. Wastewater treatment system.

9. In Paragraph 8, A cleaning liquid supply source connected to the cover to supply cleaning liquid to the housing through the inlet; and The apparatus further includes a switching valve configured to selectively connect the above-mentioned wastewater supply source and the above-mentioned cleaning solution supply source to the above-mentioned inlet. Wastewater treatment system.

10. In Paragraph 8, The second outlet is connected to an extension pipe extending upward from the cover at a preset height, and is connected to the oil-soluble liquid tank through the extension pipe, and The apparatus further comprises an opening and closing valve configured to allow or block the flow of fluid through the extension tube, either manually or automatically. Wastewater treatment system.

11. In Paragraph 10, A pressure sensor configured to sense the pressure inside the housing or the pressure inside the extension tube; and The invention further includes a controller configured to control the opening and closing of the shut-off valve based on the pressure sensed by the pressure sensor. Wastewater treatment system.

12. In Paragraph 8, A buffer tank disposed between the second outlet and the oil-soluble liquid tank and configured to receive the oil-soluble liquid discharged through the second outlet; and The apparatus further comprises an opening / closing valve disposed between the buffer tank and the oil-soluble liquid tank and configured to allow or block the flow of fluid through the extension pipe, either manually or automatically. Wastewater treatment system.

13. In Paragraph 8, The above wastewater treatment device is composed of a plurality of units, and A flow distributor disposed between the above-mentioned wastewater supply source and the above-mentioned plurality of wastewater treatment devices and configured to evenly distribute the wastewater to the above-mentioned plurality of wastewater treatment devices, Wastewater treatment system.

14. In Paragraph 13, The apparatus further includes a plurality of shut-off valves each disposed between the flow distributor and the plurality of treatment devices and configured to selectively block the wastewater supplied to each of the plurality of wastewater treatment devices. Wastewater treatment system.

15. In Paragraph 13, The above flow distributor is designed such that the length between a distribution inlet connected to the wastewater supply source and a plurality of distribution outlets each connected to the plurality of wastewater treatment devices is constant, so that the flow rate of the wastewater is evenly distributed to the plurality of wastewater treatment devices. Wastewater treatment system.

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