KR102170601B1 - Advanced sewage and wastewater separation membrane device using low temperature plasma - Google Patents

Abstract

The present invention relates to a separation membrane device for advanced sewage and wastewater treatment using a low-temperature plasma and a highly concentrated bio-film, which significantly improves treatment efficiency by using the combination of a biological method and a membrane separation method to remove organic substances, nitrogen, and phosphorus from sewage and wastewater and, more specifically, to a separation membrane device for advanced sewage and wastewater treatment, comprising: a specific gravity treatment tank (10); a flow adjustment tank (20); an anaerobic tank (30); an anoxic tank (40); a highly concentrated bioreactor (50); a media tower (55); a membrane separation tank (60); and a discharge tank (70).

Description

Advanced sewage and wastewater separation membrane device using low temperature plasma}

The present invention relates to a separation membrane device for advanced treatment of sewage and wastewater using a low-temperature plasma and a highly concentrated biofilm, and more specifically, treatment efficiency by using a combination of a biological method and a membrane separation method to remove organic substances, nitrogen and phosphorus from sewage and wastewater. The high level of sewage and wastewater using low-temperature plasma and highly concentrated biofilms that can significantly improve and reduce the treatment load of the separator installed at the rear end to extend the life of the separator and reduce maintenance costs, while securing the purified static water quality and enabling safe discharge and automated operation. It relates to a treatment separation membrane device.

In general, treatment methods for sewage and wastewater treatment systems are classified into physical treatment methods, chemical treatment methods, and biological treatment methods. Sewage and wastewater contain organic matter, nitrogen and phosphorus. Nitrogen or phosphorus is mainly generated from agricultural fertilizers, human or livestock manure, synthetic detergents, etc.When large amounts of nitrogen or phosphorus untreated sewage or wastewater flow into lakes, including rivers or dams, red tide along the coast due to eutrophication Phenomenon, fish toxins of ammonia, and a lack of dissolved oxygen in water are caused.

Accordingly, the government is expanding the standards for nitrogen and phosphorus emissions every year.

The biological nitrogen and phosphorus removal process of the system to remove nitrogen and phosphorus from such sewage or wastewater is referred to as advanced treatment. The representative activated sludge method of the advanced treatment method includes various reaction tanks such as an aerobic reaction tank (or aeration tank), an oxygen-free reaction tank, and an anaerobic reaction tank. ), the nitrite nitrogen and nitrate nitrogen are changed, and in the oxygen-free reactor, denitrification is performed, and nitrogen gas is released to the atmosphere.

In addition, in the biological treatment method, the treatment efficiency decreases when the water temperature decreases. This is because the activity and fertility of microorganisms decreases. In addition, as a denitrification reaction for removing nitrogen, nitrous acid or nitric acid must be reduced and discharged as nitrogen gas into the atmosphere. However, when the water temperature decreases, the denitrification reaction decreases and the treatment efficiency decreases. Therefore, it is necessary to maintain an appropriate water temperature, and of course, sufficient oxygen must be supplied to the aerobic reactor, and the supplied air is required to be well mixed with wastewater and microorganisms.

In addition, the intermittent aeration method in which nitrification and denitrification reactions are alternately repeated at intervals of time was used for the treatment of the construction method using a single reactor. Therefore, there is a problem in that the configuration of the process and the device is complicated and operation management is difficult.

Among other methods, as a chemical treatment method, a basic method of separating and removing the sediment has been used by introducing iron salt and aluminum salt into sewage so that phosphorus and metal ions contained in sewage and wastewater are combined. However, the chemical treatment method has problems such as requiring specialized skills that must be managed by a professional manager full-time, and the cost of drugs is high.

Recently, as an alternative to the above biological and chemical treatment methods, a lot of methods using a separation membrane have been introduced, and a separation membrane is introduced into the aeration tank to separate organic and suspended substances in sewage and wastewater using a fine membrane. In this case, there is a problem in that the separation membrane is quickly clogged to shorten the life of the separation membrane, resulting in a large maintenance cost, and a large amount of sludge of sewage and wastewater remaining after separation.

In addition, in order to remove nitrogen and phosphorus from the existing treatment facilities, there are many problems such as the difficulty of completely replacing the entire treatment facility, or almost replacing and improving each room inside the treatment facility, and the cost of securing and expanding the site. Being poem.

In connection with the above technology, the present inventors have already disclosed “active-bio carrier and water treatment device using the same” and “advanced treatment sewage and wastewater equipped with a high-performance treatment device through Registration Patent No. 10-0924992 and Registration Patent No. 10-1193497. Purification device” has been disclosed.

Registered Patent No. 10-0924992 Registered Patent No. 10-1193497

Accordingly, the present invention is invented to eliminate the above problems, and greatly improves treatment efficiency by using a combination of a biological method and a membrane separation method to remove organic substances, nitrogen, and phosphorus from sewage and wastewater. The technical task focuses on the advanced sewage and wastewater treatment separator device using low-temperature plasma and highly concentrated biofilm that secures purified static water quality and enables safe discharge and automated operation while lowering the treatment load and reducing maintenance costs. It was completed as.

In addition, the existing sewage and wastewater treatment facilities are simply and easily installed and improved without further increasing the treatment capacity to improve the performance of advanced treatment by complexly treating organic matter, nitrogen, and phosphorus in sewage and wastewater. It was completed as a technical task with the focus on the advanced sewage and wastewater treatment separation membrane device using plasma and highly concentrated biofilm.

In order to achieve the above technical problem, the present invention is to construct an advanced sewage and wastewater treatment separation membrane device using a low-temperature plasma and a highly concentrated biofilm, an inlet for introducing sewage and wastewater to the entrance side of the treatment tank A buried underground. (81) is provided, and an air supply unit 82 in which a distribution pipe 83 is installed to supply air through a supply pipe 84 provided at the lower side of the treatment tank A filled with sewage and wastewater is provided. It is configured and provided on the inlet side of sewage and wastewater of the treatment tank (A), and sewage and wastewater are introduced into the raw water pump 12 or the natural flow through the screen 11, and sand by the specific gravity of the introduced organic matter. A specific gravity treatment tank 10 that precipitates a material with a high specific gravity to the bottom and separates it into a floating material with a low specific gravity at the top, and a barrier 15 is installed at the rear side in the flow direction of sewage and wastewater to discharge the first treated water. ); It is provided on one side of the specific gravity treatment tank 10 at the boundary of the blocking film 15 to maintain a constant flow rate even during peak load of the first treated water flowing through the blocking film 15 and change the load of contaminants for biological treatment. A flow rate adjustment tank 20 for discharging the second treated water by adjusting the control; It is provided on one side of the flow control tank 20 and the second treated water is introduced, and a stirring pump 31 or a stirring impeller for stirring the second treated water is provided at the bottom, and iron is removed through corrosion on the upper side. An anaerobic tank (30) that is filled with metal pieces that can generate on, but is provided with a perforated plate that prevents separation of the metal pieces on the bottom surface and a steel filter (35) equipped with a grid on the side surface to discharge the third treated water. ; It is provided on one side of the anaerobic tank 30 and the third treated water is introduced, and a stirring pump 41 or a stirring impeller for stirring the third treated water is provided at the bottom, and the third treated water is An oxygen-free tank 40 provided with a low-temperature plasma heater 45 for promoting denitrification reaction and activation of microorganisms while raising the temperature to 40 to 60° C. to discharge the fourth treated water; The low-temperature plasma heater 45 allows the heating body 45a to be submerged under the water surface of the third treated water, and the heater cap 45b is positioned above the water surface of the third treated water. It is configured to be connected, and is provided on one side of the anoxic tank 40 so that the fourth treated water is introduced, and the air injection diffuser 52 is connected to the supply pipe 84 at the bottom to supply air to the fourth treated water. A highly enriched bioreactor 50 which is provided and is filled with a fluid active-bio carrier 53 or a fixed bed filter medium on the upper side of the air injection diffuser 52 to discharge the fifth treated water; The active-bio carrier 53 is composed mainly of 20 to 50% by weight of oyster shell powder so that the total weight is 100% by weight, and as a mixture, an active inorganic filler of 5 to 10% by weight of activated carbon and 5 to 10% by weight of zeolite E, 5 to 15% by weight of perlite is used as a specific gravity control body, and the remaining weight is composed of a microbial carrier filled with an extrudate in the form of a double pipe with a specific gravity of less than 1±0.5 by mixing polyether into a molded body and then melt extrusion. , Media tower 55 connected to one side of the highly enriched bioreactor 50; A lattice network 57 is provided at the lower side of the media tower 55 to prevent the inflow of the fluid active-bio carrier 53 or the fixed bed filter material in the highly concentrated bioreactor 50 through the lattice network 57 The treated fifth treated water is introduced, and any one of a fixed active-bio carrier 58, activated carbon, and ceramic is filled in the inner space of the media tower 55, and the upper side of the media tower 55 is fixed. The active-bio carrier 58, activated carbon, and a desorption backwash air pipe 56 to prevent clogging by microorganisms attached to any one of ceramics are formed, and the media tower 55 is a highly concentrated bioreactor 50 It is installed in the form of a rectangular parallelepiped or cylinder in a vertical and longitudinal direction along one inner wall, and in the media tower 55, a hydrogen ion index meter (PH METER), an oxidation-reduction potential difference meter (ORP METER), and a dissolved solution are used to check the denitrification state. An oxygen meter (DO METER) is further installed, and the fifth treated water is provided on one side of the media tower 55, and an immersion-type separation membrane 65 is provided therein to perform solid-liquid separation to collect the sixth treated water. A membrane separation tank 60 to discharge; At the bottom of the membrane separation tank 60, an air injection diffuser 62 connected to the supply pipe 84 to supply air to the fifth treated water is provided, and is connected to one side of the membrane separation tank 60 Disinfection tank (70) for final discharge after disinfecting the sixth treated water; and an anaerobic tank (dephosphorylation circulating water in which phosphorus is excessively ingested in the highly concentrated bioreactor 50) through the circulation water transfer line 92 ( 30) and sprinkling on the upper side of the iron filter 35 provided on the upper part of the anaerobic tank 30, and moving to the lower side, contacting the metal piece to elute iron ions, and the second treated water in the anaerobic tank 30 It is configured to be mixed, but the upper surface of the iron filter 35 is placed 3 to 10 cm higher than the water level of the second treated water filled in the anaerobic tank 30 to be sprayed through the circulation water transfer line 92 The dephosphorylated circulating water is configured to flow into the second treated water in the anaerobic tank 30 through the iron filter 35, and air is delivered from the air supply unit 82 to the immersion type separation membrane 65 in the membrane separation tank 60. In addition to connecting the supply pipe 84 to be used, a suction pump injection port 86-1 connected to the suction pump 86 installed outside the treatment tank A is connected to the submerged separation membrane 65 to separate the membrane. The sixth treated water is transferred through the suction pump inlet 86-1 to be transferred to the discharge tank 70 through the suction pump outlet 86-2, and then discharged through the discharge unit 85. And, the nitrate circulating water that has been nitrified in the membrane separation tank 60 is moved to the oxygen-free tank 40 through the circulating water transfer line 94 to be mixed with the third treated water and converted into the fourth treated water. It provides an advanced sewage and wastewater treatment separation membrane device using a low-temperature plasma and a highly concentrated biofilm, characterized in that.

At this time, a first supply line 23 provided with a plurality of flow control pumps 21 and connected to each of the plurality of flow control pumps 21 to uniformly distribute the flow rate of sewage and wastewater flowing into the bottom of the flow control tank 20, The second treated water is moved to the anaerobic tank 30 on the rear side through the second supply line 26 connected to each of the first supply lines 23. In addition, it is characterized in that it is configured to be provided with an air injection diffuser 13 connected to the supply pipe 84 at the lower side of the flow adjustment tank 20 to supply air into the flow control tank 20.

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According to the present invention, the treatment efficiency is greatly improved by using a combination of a biological method and a membrane separation method to remove organic substances, nitrogen, and phosphorus from sewage and wastewater, and to extend the life of the separator by lowering the treatment load of the separator installed at the rear end. While reducing maintenance costs, there are effects such as securing purified static water quality and enabling safe discharge and automated operation.

In addition, it is possible to improve the performance of advanced treatment by complexly treating organic matter, nitrogen and phosphorus in sewage and wastewater by simply and easily installing and improving the existing sewage and wastewater treatment facilities without further increasing the treatment capacity. It works.

1 is an overall exemplary view of an advanced sewage and wastewater treatment separation membrane device using a low-temperature plasma and a highly concentrated biofilm according to the present invention
Figure 2 is an exemplary diagram of a specific gravity treatment tank and a flow control tank according to the present invention
3 is an exemplary view of an anaerobic tank and an anoxic tank according to the present invention
4 is an exemplary view of a highly concentrated biological reactor and a media tower according to the present invention
5 is an exemplary view of a membrane separation tank and a discharge tank according to the present invention

Hereinafter, with reference to the accompanying drawings, specific details for the implementation of the present invention will be described in more detail.

The present invention greatly improves the treatment efficiency by using a combination of a biological method and a membrane separation method to remove organic substances, nitrogen, and phosphorus from sewage and wastewater, and lowers the treatment load of the separator installed at the rear end to extend the life of the separator and reduce maintenance costs. It relates to a separation membrane device for advanced sewage and wastewater treatment using a low-temperature plasma and a highly concentrated biofilm capable of securing a reduced and purified static water quality, safe discharge, and automated operation. Referring to FIGS. 1 to 5, a specific gravity treatment tank 10, It comprises a flow control tank 20, an anaerobic tank 30, an oxygen-free tank 40, a highly concentrated bioreactor 50, a media tower 55, a membrane separation tank 60, and a discharge tank 70.

In order to implement the advanced sewage and wastewater treatment separation membrane device using the low-temperature plasma and highly concentrated biofilm of the present invention, first, the inlet 81 for introducing sewage and wastewater to the entrance side of the treatment tank A buried underground as in FIG. Is provided, and an air supply unit 82 in which a distribution pipe 83 is installed to supply air through a supply pipe 84 provided at a lower side in the treatment tank A filled with sewage and wastewater is provided.

The air supply unit 82 is used as an embodiment, such as a ring blower, and the air supply unit 82 includes a specific gravity treatment tank 10, a flow control tank 20, an anaerobic tank 30, an oxygen free tank 40, and a highly concentrated organism. A distribution pipe 83 is installed along the reaction tank 50, the media tower 55, the membrane separation tank 60, and the discharge tank 70, and a flow control tank 20, a highly enriched bioreactor on the distribution pipe 83 50 and a supply pipe 84 for supplying and moving air into the membrane separation tank 60 are connected and installed.

The specific gravity treatment tank 10 provided on the inlet side of the sewage and wastewater of the treatment tank A is the raw water pump 12 through the screen 11 for the sewage and wastewater moving from the inlet 81 as shown in FIG. Alternatively, a material with a high specific gravity including sand is precipitated to the lower portion by the specific gravity of the introduced organic material, and is separated into a floating material having a low specific gravity in the upper portion, and a barrier film 15 on the rear side in the flow direction of sewage and wastewater ) Is installed and configured to discharge the first treated water.

At this time, the specific gravity treatment tank 10 is set to give a residence time of 12 hours compared to the daily treatment capacity by the sewage method in order to cope with the load fluctuation even if the inflow flow rate fluctuates severely, and is filtered by the blocking film 15 to treat the specific gravity. The sludge deposited on the bottom of the tank 10 is moved through the discharge pipe 97 and transferred to the sludge treatment plant through the carrying vehicle 98.

Flow control tank 20 provided on one side of the barrier film 15 of the specific gravity treatment tank 10 as a boundary maintains a constant flow rate even during peak load of the first treated water introduced through the barrier film 15 It is configured to discharge the second treated water by adjusting the load fluctuation of the pollutant for treatment.

As a biofilm is formed by microorganisms attached to the blocking film 15, organic matters are biologically treated, and the role of sedimenting and separating suspended contaminants in sewage within a short time, and reducing the flow rate of sewage flowing into the pump, etc. The flow control tank 20, which is a treatment tank, prevents impurities in the water from flowing in a state where it has not yet been precipitated, and prevents it from taking a long time for filtration and precipitation, and has the effect of treating and filtering organic substances by microorganisms attached to the blocking film 15 .

At this time, as shown in FIG. 2, a first supply line is provided with a plurality of flow rate control pumps 21 to uniformly distribute the flow rate of sewage and wastewater flowing into the bottom of the flow control tank 20 and connected to each The second treated water is moved to the anaerobic tank 30 at the rear side through 23 and the second supply line 26 connecting each of the first supply lines 23. In addition, an air injection diffuser 13 is provided at the lower side of the flow control tank 20 to supply air to the supply pipe 84 to supply air into the flow control tank 20.

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The flow control tank 20 is set to give a residence time of 10 to 12 hours compared to the daily treatment capacity as a method to cope with load fluctuations even if the inflow flow rate fluctuates severely.

The anaerobic tank 30 provided on one side of the flow control tank 20 and into which the second treated water flows is provided with a stirring pump 31 or a stirring impeller for stirring the second treated water at the bottom as shown in FIG. And, the upper side is filled with metal pieces that can generate iron ions through corrosion, and a perforated plate that prevents the separation of the metal pieces on the bottom surface and a steel filter 35 with a grid installed on the side are provided. It is configured to discharge treated water.

In addition, the anoxic tank 40 provided on one side of the anaerobic tank 30 to which the third treated water flows is provided with a stirring pump 41 or a stirring impeller for stirring the third treated water at the bottom, and the upper side A low-temperature plasma heater 45 is provided for promoting denitrification reaction and activation of microorganisms while raising the temperature of the third treated water to 40 to 60°C, and configured to discharge the fourth treated water.

The low-temperature plasma heater 45 is a technology that uses a VUV (vacuum ultraviolet) wavelength having a wavelength of about 100 to 200, and removes bacteria, viruses and bacteria floating in treated water (water) or air. It prevents morbidity, removes odors by sterilization and decomposition without masking, removes pathogens, prevents secondary infection, removes fine dust, and removes organic compounds.

In other words, a plasma device is used in the fields of surface treatment, purification of contaminated water, restoration of soil, sterilization of food, etc., but the low-temperature plasma heater 45 generally used in water is Wastewater can be purified by reacting with various harmful substances present in the wastewater by oxidation and decomposition.

In addition, the low-temperature plasma heater 45 can improve water treatment efficiency by simultaneously providing effects such as ozone, UV, and microbubbles, which are plasma by-products, since plasma can purify the water to be treated in a large area.

In this low-temperature plasma heater 45, the heating body 45a is submerged under the surface of the third treated water, which is the target water, and the heater cap 45b is positioned above the water surface of the third treated water. Make sure to connect.

The highly concentrated bioreactor 50 provided at one side of the anoxic tank 40 and into which the fourth treated water is introduced is connected to the supply pipe 84 at the bottom as shown in FIG. 4 to supply air to the fourth treated water. A diffuser 52 is provided, and a fluid active-bio carrier 53 or a fixed bed filter medium is filled on the upper side of the air injection diffuser 52 to discharge the fifth treated water. In this case, it may be used by filling both the fluid active-bio carrier 53 and the fixed bed media according to the design conditions.

At this time, a fluid active-bio carrier 53 or a fixed bed filter medium is filled in the upper portion of the air injection diffuser 52 so that contaminants contained in the fourth treated water contact the carrier, and the microorganisms attached to the carrier contact the carrier. It adsorbs and decomposes various organic substances and hardly decomposable substances, converts ammonia nitrogen into nitrate nitrogen, and the microorganisms from which phosphorus has been removed will remove phosphorus by excessive intake of phosphorus in the body.

The active-bio carrier 53 used in the above is composed mainly of 20-50% by weight of oyster shell powder so that the total weight is 100% by weight, and the active carbon 5-10% by weight and 5-10% by weight of zeolite as a mixture In the form of a microbial carrier filled with an extrudate in the form of a double pipe with a specific gravity of 1±0.5 or less by melt-extrusion after mixing 5 to 15% by weight of perlite as a specific gravity control body and polyether in a molded body for the remaining weight Is provided as.

In the present invention, the main component of the oyster shell is 88-99% of the total amount of calcium (CaCO3), Mg 0.39%, K 0.05%, Si 0.02%, Fe 0.03%, Na 0.92%, etc. Trace elements are composed of useful components, and because of their large specific surface area as a porous material, microbes can quickly settle and grow with high adsorption power to heavy metals and organic substances, and increase of CO3 ^2- ion concentration due to dissolution of calcium carbonate and Heavy metal ions can be precipitated into hydroxides and oxides due to an increase in pH due to alkalinity such as Ca, Mg, and Na, and have excellent properties such as no special need for pH adjustment for optimizing adsorption efficiency.

In addition, by recycling the fishery waste of the oyster shell as a resource, it is possible to prevent the damage to the natural landscape accordingly, and to expect side effects such as health and hygiene of the people. In particular, the oyster shell is an excellent resource but cannot be utilized and when dumping at sea 1 It is said that it costs about 25,000 won per ton. Because of this, manufacturing cost is low, and there is also an advantage of recycling waste as a resource.

In addition, pearlite applied as a specific gravity control agent in the present invention contains components such as sodium oxide, potassium oxide, calcium oxide, iron oxide, phosphorus oxide, magnesium oxide, and nickel oxide.

The pearlite is expanded by firing pearlite at 900 to 1200° C., and has excellent characteristics as a microbial carrier because it forms a porosity having a plurality of capillaries in a light white porous material. The porosity of pearlite is about 48%, and the specific surface area is about 1,100㎡/g. When forming a support using pearlite, the porosity is excellent, it is advantageous for the formation of microbial communities, and the anaerobic conditions in the porous carrier are well established. In addition, pearlite, unlike general vinyl chloride or organic chemical products, has a porous structure with a number of capillary phases up to the inside, so that reaction easily occurs not only on the surface but also inside. Due to the porosity of the pearlite, it exists in a form that is evenly adsorbed on the surface and inner pores of the pearlite, helping the stable growth of microorganisms and temperature. It has excellent fixing ability as it has resistance to rapid environmental changes such as moisture or pH.

In particular, it is possible to implement an active-bio carrier that can freely flow in the wastewater to be treated inside the reactor by using it as a specific gravity controller of the fluidized bed carrier by using the light specific gravity of 0.04 to 0.25.

A media tower 55 connected to one side of the highly enriched bioreactor 50 is provided, and a grid to prevent the inflow of the fluid active-bio carrier 53 or the fixed bed media at the lower side of the media tower 55 A net 57 is provided and the fifth treated water treated in the highly concentrated bioreactor 50 flows through the grid 57, and a fixed active-bio carrier 58 is provided in the inner space of the media tower 55. , Activated carbon, ceramic, and the upper side of the media tower 55 has a fixed active-bio carrier 58, activated carbon, and a desorption backwash air pipe to prevent closure by microorganisms attached to any one of ceramics Let 56 be formed.

At this time, microorganisms adsorbed and grown on the fixed active-bio carrier 58 act as a dense biofilm filter on the surface, and the biofilm filter filters and adsorbs and decomposes untreated organic matter and non-degradable material, and is active. The sludge is filtered, falls to the bottom without a separate conveying device, and naturally remains in the highly concentrated bioreactor 50, so that the activated sludge concentration is highly concentrated in the highly concentrated bioreactor 50, thereby maintaining a high concentration of microorganisms, so treatment efficiency By increasing the size, it is possible to reduce the size of the conventional reactor.

In addition to the fixed active-bio carrier 58, the inner space of the media tower 55 may be filled with activated carbon or ceramic, that is, any of the fixed active-bio carrier 58, activated carbon, and ceramic. One is to be filled and used, and the media tower 55 is installed in a longitudinal direction along an inner wall of one side of the highly concentrated bioreactor 50 as shown in FIG. 4, and is preferably formed in a rectangular parallelepiped or cylindrical shape. .

In the process of processing in the highly concentrated bioreactor 50 and flowing into the media tower 55, NO3- and NO2- are used as electron acceptors, and nitrogen is released into the atmosphere and removed using organic substances supplied to wastewater as carbon sources. Oxidation (Denitrification) can be achieved.

This denitrification usually occurs in two stages, the first stage is the process of converting nitric acid to nitrous acid, and the second stage is the process of converting nitrous acid to N2 gas through two intermediate products.

Step 1: NO3 -> NO2- (NO3- + organic carbon source)

Step 2: NO -> N2O -> N2 (H2O + CO2 + Cell + N2 ↑)

Here, it is preferable that the amount of dissolved oxygen (DO) in the first anoxic tank 10 is kept low and nitrate is sufficiently secured so that NO3- and NO2- can be used as electron acceptors.

At this time, the organic carbon source required by the microorganisms for reduction to N2 gas may not be supplied separately if it has an organic carbon source such as livestock wastewater. If the organic carbon source is insufficient, acetic acid, acetone An organic carbon source such as (Aceton) or methanol may be supplied separately.

In addition, although not shown in the media tower 55, a hydrogen ion index meter (PH METER), an oxidation-reduction potential difference meter (ORP METER), and a dissolved oxygen amount meter (DO METER) may be further installed in order to check the denitrification state. .

Accordingly, the wastewater passing through the media tower 55 may be subjected to secondary denitrification of removing nitrogen by releasing nitrogen into the atmosphere using the organic carbon source supplied to the wastewater as a nutrient source.

In the configuration of the anaerobic tank 30 and the highly enriched bioreactor 50, as shown in FIG. 1, the dephosphorylated circulating water in which phosphorus was excessively ingested in the highly enriched bioreactor 50 is transferred to the anaerobic tank 30 through the circulating water transfer line 92. ) And sprayed on the upper side of the iron filter 35 provided on the upper part of the anaerobic tank 30, moved to the lower side, and contacted the metal piece to elute iron ions and mixed with the second treated water in the anaerobic tank 30 At this time, the upper surface of the iron filter 35 is placed 3 to 10 cm higher than the water level of the second treated water filled in the anaerobic tank 30, and sprayed through the circulating water transfer line 92 It is preferable to configure the dephosphorized circulating water to flow into the second treated water in the anaerobic tank 30 through the iron filter 35 to prevent the dephosphorized circulating water from directly flowing into the second treated water.

Meanwhile, the membrane separation tank 60 provided on one side of the media tower 55 into which the fifth treated water flows is provided with an immersion-type separation membrane 65 therein to perform solid-liquid separation to perform the sixth treatment. It is configured to discharge water. At this time, an air injection diffuser 62 is provided at the bottom of the membrane separation tank 60 to supply air to the fifth treated water by being connected to the supply pipe 84.

The above-described air injection diffuser (13, 52, 62) is to use a twister-type air injection diffuser as an embodiment, the twister type air injection diffuser (13, 52, 62) of the air injection diffuser It has a large air permeable volume, a wide range of applications, a large air diffuser area, less fluid flow interference, easy individual installation and lifting and inspection, and has the advantages of a membrane disk and a tubular air injection diffuser.

In addition, the twister-type air injection diffuser (13, 52, 62) is composed of a hose having a number of pores that are generally less elastic than rubber compared to a membrane disk and a tubular air-injection diffuser, so durability against the pressure of the air pipe Since this large pore area is fixed, when the amount of air supply increases, the diameter of the outflow air is constant and only the outflow rate increases, so that microbubbles are maintained and the oxygen transfer rate is high. In addition, since the durability against pressure is large, clogging of the pores may be eliminated if the air supply amount is instantaneously excessively supplied with an appropriate period.

In addition, a discharge tank 70 configured to be connected to one side of the membrane separation tank 60 to disinfect the sixth treated water and finally discharge it.

In the configuration of the membrane separation tank 60 and the discharge tank 70 described above, the supply pipe 84 through which air is transmitted from the air supply unit 82 is connected to the immersion type separation membrane 65 in the membrane separation tank 60 In addition, the suction pump injection port 86-1 connected to the suction pump 86 installed outside the treatment tank A is connected to the immersion type separation membrane 65 to be separated, and the suction pump injection port 86 The sixth treated water transferred through -1) is transferred to the discharge tank 70 through the suction pump discharge port 86-2, and then discharged through the discharge unit 85. At this time, reference numeral 87 is a differential pressure gauge indicating a pressure difference between the suction pump inlet 86-1 and the suction pump outlet 86-2 based on the suction pump 86.

In addition, the nitrate circulating water that has been nitrified in the membrane separation tank 60 is moved to the oxygen-free tank 40 through the circulating water transfer line 94 to be mixed with the third treated water and converted into the fourth treated water. do.

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According to the advanced sewage and wastewater treatment separation membrane device used with the low-temperature plasma of the present invention as described above, the treatment efficiency is greatly improved by using a combination of a biological method and a membrane separation method to remove organic substances, nitrogen and phosphorus from sewage and wastewater. In addition, by lowering the processing load of the separation membrane installed at the rear end, it is possible to secure the purified static water quality, safe discharge, and automatic operation while reducing the lifespan and maintenance cost of the separation membrane. In addition, it is possible to improve the performance of advanced treatment by complexly treating organic matter, nitrogen, and phosphorus in sewage and wastewater by simply and easily installing and improving the existing sewage and wastewater treatment facilities without further increasing the treatment capacity.

The present invention described above has been described with reference to an embodiment shown in the drawings, but this is only exemplary, and various modifications and other equivalent embodiments are possible from those of ordinary skill in the art. Should be clarified. Accordingly, the true technical protection scope of the present invention should be interpreted by the appended claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: specific gravity treatment tank 11: screen
12: raw water pump 15: blocking membrane
20: flow adjustment tank 31,41: agitation pump
35: iron filter 40: anoxic tank
45: low temperature plasma heater 50: highly concentrated bioreactor
52,62: air-injected diffuser 53: fluid active-bio carrier
55: Media Tower 56: Tally Station Tax Air Pipe
57: grid 58: fixed active-bio carrier
60: membrane separation tank 65: immersion membrane
70: discharge tank 81: inlet
82: air supply unit 83: distribution pipe
84: supply pipe

Claims (10)

In constructing a separation membrane device for advanced sewage and wastewater treatment using low-temperature plasma and highly concentrated biofilm,
An inlet 81 for introducing sewage and wastewater into the initial entrance of the treatment tank A buried underground is provided, and through a supply pipe 84 provided at the lower side of the treatment tank A filled with the sewage and wastewater. An air supply unit 82 in which a distribution pipe 83 is installed to supply air is provided and configured,
It is provided on the inlet side of sewage and wastewater of the treatment tank (A), and sewage and wastewater are introduced into the raw water pump 12 or the natural flow through the screen 11, and the specific gravity including sand by the specific gravity of the introduced organic matter The large material is precipitated in the lower part, the upper part is separated into a floating material having a low specific gravity, and a blocking film 15 is installed at the rear side in the flow direction of sewage and wastewater to discharge the first treated water;
It is provided on one side of the specific gravity treatment tank 10 at the boundary of the blocking film 15 to maintain a constant flow rate even during peak load of the first treated water flowing through the blocking film 15 and change the load of contaminants for biological treatment. A flow rate adjustment tank 20 for discharging the second treated water by adjusting the control;
It is provided on one side of the flow control tank 20 and the second treated water is introduced, and a stirring pump 31 or a stirring impeller for stirring the second treated water is provided at the bottom, and iron is removed through corrosion on the upper side. An anaerobic tank (30) that is filled with metal pieces that can generate on, but is provided with a perforated plate that prevents separation of the metal pieces on the bottom surface and a steel filter (35) equipped with a grid on the side surface to discharge the third treated water. ;
It is provided on one side of the anaerobic tank 30 and the third treated water is introduced, and a stirring pump 41 or a stirring impeller for stirring the third treated water is provided at the bottom, and the third treated water is An oxygen-free tank 40 provided with a low-temperature plasma heater 45 for promoting denitrification reaction and activation of microorganisms while raising the temperature to 40 to 60° C. to discharge the fourth treated water;
The low-temperature plasma heater 45 allows the heating body 45a to be submerged under the water surface of the third treated water, and the heater cap 45b is positioned above the water surface of the third treated water. Configured to be connected,
An air injection diffuser 52 is provided at one side of the anoxic tank 40 to allow the fourth treated water to flow in, and is connected to the supply pipe 84 at the bottom to supply air to the fourth treated water, and the air A highly concentrated bioreactor 50 filled with a fluid active-bio carrier 53 or a fixed bed filter medium on the upper side of the injection diffuser 52 to discharge the fifth treated water;
The active-bio carrier 53 is composed mainly of 20 to 50% by weight of oyster shell powder so that the total weight is 100% by weight, and as a mixture, an active inorganic filler of 5 to 10% by weight of activated carbon and 5 to 10% by weight of zeolite E, 5 to 15% by weight of perlite is used as a specific gravity control body, and the remaining weight is composed of a microbial carrier filled with an extrudate in the form of a double pipe with a specific gravity of less than 1±0.5 by mixing polyether into a molded body and then melt extrusion. ,
A media tower 55 connected to one side of the highly concentrated bioreactor 50; A lattice network 57 is provided at the lower side of the media tower 55 to prevent the inflow of the fluid active-bio carrier 53 or the fixed bed filter material in the highly concentrated bioreactor 50 through the lattice network 57 The treated fifth treated water is introduced, and any one of a fixed active-bio carrier 58, activated carbon, and ceramic is filled in the inner space of the media tower 55, and the upper side of the media tower 55 is fixed. The active-bio carrier 58, activated carbon, and a desorption backwash air pipe 56 to prevent clogging by microorganisms attached to any one of ceramics are formed, and the media tower 55 is a highly concentrated bioreactor 50 It is installed in the form of a rectangular parallelepiped or cylinder in a vertical and longitudinal direction along one inner wall, and in the media tower 55, a hydrogen ion index meter (PH METER), an oxidation-reduction potential difference meter (ORP METER), and a dissolved solution are used to check the denitrification state. Oxygen meter (DO METER) is further installed,
A membrane separation tank (60) provided on one side of the media tower (55) to allow the fifth treated water to flow in, and an immersion-type separation membrane (65) provided therein to perform solid-liquid separation to discharge the sixth treated water; An air injection diffuser 62 is provided at the bottom of the membrane separation tank 60 and connected to the supply pipe 84 to supply air to the fifth treated water,
Containing a discharge tank 70 connected to one side of the membrane separation tank 60 to disinfect the sixth treated water and finally discharge it,
The dephosphorylated circulating water in which phosphorus was ingested excessively in the highly concentrated bioreactor 50 is moved to the anaerobic tank 30 through the circulating water transfer line 92, and the iron filter 35 provided at the top of the anaerobic tank 30 It is configured to be mixed with the second treated water in the anaerobic tank 30 by sprinkling water on the upper side and moving to the lower side while being in contact with the metal piece to elute iron ions, but the upper surface of the iron filter 35 is filled in the anaerobic tank 30 The dephosphorylated circulating water sprayed through the circulating water transfer line 92 flows into the second treated water in the anaerobic tank 30 through the iron filter 35 by placing it 3 to 10 cm higher than the water level of the second treated water. Make it possible,
In addition to connecting the supply pipe 84 through which air is transmitted from the air supply unit 82 to the immersion type separation membrane 65 in the membrane separation tank 60, the outside of the treatment tank A is connected to the immersion type separation membrane 65 The suction pump inlet (86-1) connected to the suction pump (86) installed in is connected and installed, and the sixth treated water transferred through the suction pump inlet (86-1) is separated from the suction pump outlet (86-2). ) To be transferred to the discharge tank 70 and then discharged through the discharge unit 85,
The nitrate circulating water, which has been nitrified in the membrane separation tank 60, is moved to the oxygen-free tank 40 through the circulation water transfer line 94 and mixed with the third treated water to be converted into the fourth treated water. A separation membrane device for advanced sewage and wastewater treatment using low-temperature plasma and highly concentrated biofilm, characterized by.
The method of claim 1,
In order to uniformly distribute the flow rate of sewage and wastewater flowing into the bottom of the flow control tank 20, a plurality of flow control pumps 21 are provided and connected to each of the first supply lines 23, and each of the The second treated water is moved to the anaerobic tank 30 on the rear side through the second supply line 26 connected to the first supply line 23 of. In addition, low temperature plasma and high concentration, characterized in that the air injection diffuser 13 is provided at the lower side of the flow control tank 20 to supply air to the flow control tank 20 by being connected to the supply pipe 84 Separation membrane device for advanced sewage and wastewater treatment using biofilm. delete delete delete delete delete delete delete delete

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