Wasterwater treatment apparatus having a separating waste oil

Abstract

The present invention relates to a wastewater treatment system using a debris treatment device equipped with an oil separator, and more specifically, to a wastewater treatment system using a debris treatment device equipped with an oil separator that removes oil to prevent clogging when using a plurality of carrier units filled with composite carriers, thereby increasing the treatment efficiency of the treated water, and further maximizing the decomposition of organic matter and the removal efficiency of nitrogen and phosphorus through the appropriate detachment action of microorganisms attached to the carriers. The present invention relates to a wastewater treatment system comprising an oil separator (201), a debris treatment unit (203), a distribution tank (202), an anaerobic tank (204), an aerobic tank (206), a sedimentation tank (208), a sludge storage tank (210), and a discharge tank (212). The wastewater treatment system comprises an oil separator for removing oil mixed in the influent water, a debris treatment unit for removing various debris, and a carrier rotary device equipped with a composite carrier for attaching, multiplying, and activating microorganisms. In order to remove oil mixed in the wastewater upon inflow of wastewater, the oil separator (201) is connected and installed to the debris treatment unit (203). The debris treatment unit (203) includes a sedimentation screw for removing sediment and a screen for removing debris. The debris treatment unit (203) removes oil contained in the inflowing wastewater. The wastewater that has passed through the oil separator (201) is removed using an oil separator (201), and the sedimentation substances mixed in the wastewater are removed using a sedimentation screw consisting of a screw-type remover, and the wastewater from which the sedimentation substances have been removed is continuously transferred to a screen, and the wastewater from which the sedimentation substances have been removed is installed so that impurities are removed as it passes through the screen, and the carrier rotor (100) is equipped with a rotating shaft body (10), and the rotating shaft body (10) rotates and the rotating shaft unit (102, 103) for rotating the carrier unit (112), first and second inner plate unit parts (104, 105), first and second outer plate unit parts (106, 107), first and second fixed units (108, 109), a plurality of support plate units (110) and carrier units (112), and is equipped on the carrier unit (112). It includes a composite carrier (200). According to the wastewater treatment system using a debris treatment device equipped with an oil separator of the present invention, by treating debris using the debris treatment device and simultaneously effectively separating and removing oil, damage to the composite carrier is prevented, and as a result, the wastewater treatment process becomes smooth and fast. In addition, the present invention has the advantage of significantly improving the efficiency of the composite carrier by removing oil to prevent the pores of the composite carrier from becoming clogged, and can maximize the efficiency of sludge removal, organic matter decomposition, and removal of nitrogen and phosphorus, and can increase the treatment efficiency of the influent by shortening the retention time of the influent.

Description

Technology Field

[0001] The present invention relates to a wastewater treatment system using a debris treatment device equipped with an oil separator, and more specifically, to a wastewater treatment system using a debris treatment device equipped with an oil separator that removes oil to prevent clogging when using a plurality of carrier units filled with composite carriers, thereby increasing the treatment efficiency of the treated water, and further maximizing the decomposition of organic matter and the removal efficiency of nitrogen and phosphorus through the appropriate detachment action of microorganisms attached to the carriers. Background Technology

[0003] In general, domestic sewage, industrial wastewater, sediment from food waste, livestock manure, and other contaminated water act as major sources of pollution in rivers; therefore, these domestic sewage and contaminated waters are purified at sewage treatment plants equipped in each city and discharged into the corresponding rivers.

[0004] At this time, if the amount of sediment increases in the sewer pipes through which sewage flows, the cross-sectional area for passage decreases, causing blockages, and if sedimentation increases, the problem of sewage backflow occurs.

[0005] In order to prevent backflow of sewage in this way, a screen is installed in the sewer pipe through which the sewage travels to filter out debris contained in the sewage.

[0006] However, when screens are installed in conventional water treatment facilities, there were disadvantages such as debris getting stuck in the screen, preventing normal filtration, reducing drainage efficiency, and failing to prevent contamination.

[0007] In addition, the aforementioned method of treating debris using a screen fails to remove oil contained in the debris, thereby clogging the pores of the composite carrier inside the carrier rotating machine and causing adverse effects throughout the entire wastewater treatment process.

[0008] Carriers are broadly classified into fluidized bed carriers and fixed-bed carriers, and the carrier materials are diverse, including polymer resins (plastics), ceramics, fibers, and waste tires.

[0009] In the case of fluidized bed carriers, there are advantages such as the elimination of structures and low resistance to water flow, but there are disadvantages such as accelerated wear due to collision with the carrier, easy detachment of microorganisms, and uneven distribution of the carrier due to carrier displacement caused by water flow.

[0010] In addition, while the fixed-phase carrier has good microbial adhesion and good suspended solids capture capabilities, it has high water resistance, which hinders the smooth transfer of oxygen and pollutants. Furthermore, it is difficult to detach attached microorganisms during long-term use, and pore clogging occurs under overload, resulting in reduced treatment efficiency.

[0011] The existing sewage treatment facilities and methods are as follows.

[0012] Existing A 2 The / O (Anarobic / Anoxic Aerobic) method refers to a process that simultaneously removes nitrogen and phosphorus by installing an anoxic tank between the anaerobic and aerobic tanks in the A / O (Air Products and Chemicals) method. The existing A 2 In the / O process, the F / M ratio is 0.15–0.25 kg·BOD / kg·MLVSS·day, and the solid retention time (SRT) is 4 to 7 days. The hydraulic retention time (HRT) is 0.5–15 hours in the anaerobic zone, 0.5–10 hours in the anoxic zone, and 35–60 hours in the aerobic zone, and the MLSS in the aeration tank is maintained at an average of 3,000–5,000 mg / ℓ.

[0013] These existing A 2The / O process includes a circulation stage from the aerobic tank to the denitrification tank, and the circulating influent at this time amounts to 100–300% of the total influent and can remove about 70% of nitrogen, but has the disadvantage of a low phosphorus removal rate, and also requires a sand filtration device or a separate chemical treatment device to treat phosphorus to a high degree, and has the disadvantage of significantly reduced operational efficiency during the winter season.

[0014] The existing MUCT (Modified University Cape Town) method is the aforementioned A 2 This is a method designed to improve efficiency by separating the anaerobic tank into a first and second anaerobic tank to compensate for the disadvantages of the / O method; the first anaerobic tank is designed to reduce only the nitrates in the return sludge, while the second anaerobic tank receives and removes a much larger amount of nitrates when receiving the mixed liquid returned from the nitrification zone.

[0015] However, this MUCT method has the disadvantage of increasing power costs and complex maintenance due to the addition of an internal return pump, and the microbial retention time is 10 to 30 days, which is longer than other methods.

[0016] In addition, the existing VIP (Virginia Initiative Plant) method is another variation of the MUCT method that provides an anoxic zone in a multi-stage process consisting of a three-stage anaerobic-anoxic-aerobic tank. It has a solid retention time (SRT) of 5 to 10 days, which is shorter than that of the MUCT method, and operates at a much higher loading rate. The mixed liquor transferred to the anaerobic tank is drawn from the final anoxic zone. Therefore, while it has a high phosphorus removal capacity, it has the disadvantage of having a significantly lower nitrogen removal rate compared to other methods.

[0017] In light of these points, the applicant of the present application filed for "a carrier rotating machine filled with a composite carrier and a method for advanced treatment of sewage using the same" and has already obtained registration (Registration No. 0477841).

[0018] The above registered patent is a technology that maximizes the efficiency of sludge detachment, organic matter decomposition, and nitrogen and phosphorus removal by passing the influent flowing into the aerobic tank through the grit chamber, primary sedimentation tank, and anaerobic tank through a carrier rotor that rotates in the opposite direction to the inflow of the influent, while simultaneously passing it through a composite carrier filled inside. It also increases the treatment efficiency of the influent by shortening the retention time of the influent. Unlike existing processes, it eliminates the need for an internal return process of the influent passing through the aerobic tank to the anoxic tank, thereby significantly reducing power costs. Furthermore, it has the advantages of low facility unit costs as it does not require separate chemical treatment equipment, and easy maintenance due to simple operation, making it a technology that can be usefully applied to newly constructed small and medium-sized sewage and wastewater treatment plants.

[0019] However, the applicant's registered patent is a method in which a carrier rotating device is installed in the aerobic tank or anaerobic tank of a sewage treatment facility composed of an anaerobic tank, an aerobic tank, and a sedimentation tank, and focuses on the treatment of phosphorus in facilities where the influent BOD is introduced at a high concentration, but has the disadvantage that the nitrogen removal efficiency is somewhat lower in facilities where the influent BOD is low.

[0020] Meanwhile, the characteristics of the incoming wastewater can be divided into organic and inorganic substances. Organic substances can be used as food (substrate) for microorganisms in biological treatment, and inorganic substances need to be removed by mechanical methods such as screens to prevent pump clogging in subsequent processes. In particular, there was a problem in that oil, which has a specific gravity less than water, was difficult to remove using existing waste treatment methods.

[0021] As a result of the failure to remove oil, the pores of the composite carrier, where microorganisms can inhabit, become blocked by the oil, leading to pore closure and ultimately clogging the composite carrier, which reduces the efficiency of the sewage treatment process and further causes adverse effects on the wastewater pretreatment process or damages the carrier rotating machine. Prior art literature

[0023] Korean Registered Patent No. 10-1129292 (Registered March 15, 2012) Korean Registered Patent No. 10-0922231 (Registered October 9, 2009) The problem to be solved

[0024] The present invention was devised to solve the above-mentioned problems, and aims to provide a wastewater treatment system using a waste treatment device equipped with an oil separator that can prevent clogging of the carrier filled in the carrier rotating device by installing an oil separator capable of separating and removing oil in the waste treatment device.

[0025] The present invention aims to provide a wastewater treatment system using a debris treatment device equipped with an oil separator, wherein the rotating shaft unit and the rotating shaft are integrated to facilitate the separation of the inner plate and the outer plate, and the inner plate unit is installed in combination so that the rotating shaft unit can be detachably disassembled and assembled.

[0026] The present invention aims to provide a wastewater treatment system using a debris treatment device equipped with an oil separator that prevents the inflow of oil by forming an inlet hole to induce a smooth flow, reducing weight, and simultaneously generating a vortex to utilize natural turbulent flow rather than laminar flow.

[0027] The present invention aims to provide a wastewater treatment system using a waste treatment device equipped with an oil separator that separates and removes oil so as not to clog the pores of a composite carrier, and allows dissolved oxygen to be naturally mixed inside and outside to achieve uniform circulation. means of solving the problem

[0029] The present invention relates to a wastewater treatment system comprising an oil separator (201), a debris treatment unit (203), a distribution tank (202), an anaerobic tank (204), an aerobic tank (206), a sedimentation tank (208), a sludge storage tank (210), and a discharge tank (212), wherein the wastewater treatment system comprises an oil separator for removing oil mixed in the influent water, a debris treatment unit for removing various debris, and a carrier rotating unit equipped with a composite carrier for attaching, multiplying, and activating microorganisms.

[0030] In order to remove oil mixed in the wastewater when wastewater flows in, an oil separator (201) is connected to and installed in a debris treatment device (203), and the debris treatment device (203) includes a sedimentation screw for removing sediment and a screen for removing debris.

[0031] The above-mentioned debris treatment device (203) is installed to remove oil contained in the incoming wastewater using the oil separator (201), remove sediment mixed in the wastewater using a sedimentation screw consisting of a screw-type remover, continuously transfer the wastewater from which sediment has been removed to a screen, and remove debris as the wastewater from which sediment has been removed passes through the screen.

[0032] The above carrier rotating machine (100) comprises a rotating shaft body (10), a rotating shaft unit section (102, 103) for rotating the rotating shaft body (10) and rotating a carrier unit (112), first and second inner plate unit sections (104, 105), first and second outer plate unit sections (106, 107), first and second fixed units (108, 109), a plurality of support plate units (110) and carrier units (112), and a composite carrier (200) provided on the carrier unit (112).

[0033] Rotation shaft unit parts (102, 103) are respectively installed at the left end and right end so as to rotate around the rotation shaft body (10), and a first inner plate unit part (104) is fixedly installed in the rotation shaft unit part (102) at the left end, and a second inner plate unit part (105) is fixedly installed in the rotation shaft unit part (103) at the right end symmetrically with respect to the first inner plate unit part (104).

[0034] A first outer plate unit (106) is fixedly installed on the outer part of the first inner plate unit (104), and a second outer plate unit (107) of the second inner plate unit (105) is fixedly installed.

[0035] A plurality of support plate units (110) are provided at regular intervals in the above-mentioned rotating shaft unit parts (102, 103), and are installed by being fitted vertically into the above-mentioned rotating shaft body (10).

[0036] A plurality of carrier units (112) are installed by being fitted horizontally into the edge portion of the support plate unit (110), and

[0037] The plurality of carrier units (112) are installed so that as the rotation axis unit (102) rotates, the support plate unit (100) rotates and the carrier unit (112) coupled to the support plate unit (110) rotates together, and at the same time, a composite carrier (200) is provided in the inner part of the carrier unit (112).

[0038] The above composite carrier (200) is a composition for an organic-inorganic composite carrier for microbial immobilization including microbial adsorption performance, comprising 19 to 29 weight% of an inorganic adsorption material selected from Type A zeolite powder or coconut-based powdered activated carbon, 25 to 45 weight% of a thermoplastic resin with a melting point of less than 200°C, 3 to 12 weight% of montmorillonite-based clay, 3 to 12 weight% of polyvinyl alcohol, 2 to 10 weight% of xanthan gum, 2 to 10 weight% of methylene chloride, 2 to 10 weight% of a water-soluble carbonate, and the remainder being water.

[0039] The above thermoplastic resin is a composition for an organic-inorganic composite carrier for microbial immobilization in which polyethylene wax and polybutylene succinate or polyvinyl chloride are mixed in a weight ratio of 1:0.1 to 0.3, and

[0040] The above-mentioned inorganic adsorption material has an average particle size of 1 to 10 μm, and

[0041] The above montmorillonite-based clay is sodium-based bentonite, and the above water-extractable carbonate is selected from alkali metals and alkaline earth metals, and

[0042] Sodium bicarbonate powder is used as the above-mentioned water-soluble carbonate, and

[0043] A plurality of support plate units (110) into which the above carrier unit (112) is fitted comprises a support plate body (64) formed in a circular shape and a plurality of carrier coupling holes (66) arranged in a circular manner and formed by penetrating the support plate body (64) from left to right, and a plurality of carrier units (112) are fitted into each correspondingly in the carrier coupling holes (66) while arranged in a circular manner.

[0044] The above carrier unit (112) is formed with a hollow interior and a cylindrical carrier unit body (68), and a plurality of carrier holes (70) are formed in the carrier unit body (68), and a plurality of composite carriers (200) are housed in the carrier unit body (68).

[0045] The above carrier hole (70) is formed to penetrate the inside and outside of the carrier unit body (68) so that the inflow and outflow of sewage can be free.

[0046] Each carrier cover (72) is fixed to the left and right sides of the carrier unit body (68) to prevent the composite carrier (200) from slipping out, and a plurality of fixing brackets (74) formed in an L-shape are fixed to the inner side of the carrier cover (72).

[0047] A plurality of guide pipes (78) are installed on the outer side of the carrier unit body (68) to surround the carrier unit body (68), and

[0048] The guide pipe (78) is characterized by having a hollow inner portion, and a reinforcing rod (80) in the form of a thin, long round bar is inserted and installed in the inner portion of the hollow portion to firmly hold the carrier unit body (68).

[0049] The present invention relates to an advanced treatment method for wastewater in which influent water passes through a distribution tank, an anoxic tank, an aerobic tank, and a final sedimentation tank in sequence, comprising: a step of separating oil contained in the wastewater; and a step of treating impurities while the oil is separated. The method comprises a step in which, after the above oil and impurities are treated, the transferred influent water moves to an aerobic tank and is immersed in the aerobic tank and subjected to carrier treatment through a carrier rotating machine equipped with a composite carrier installed therein, wherein the carrier treatment step is performed by means of a composite carrier filled inside the carrier rotating machine, comprising 19 to 29 wt% of an inorganic adsorption material selected from Type A zeolite powder or coconut-based powdered activated carbon, 25 to 45 wt% of a thermoplastic resin with a melting point of less than 200 ℃, 3 to 12 wt% of montmorillonite-based clay, 3 to 12 wt% of polyvinyl alcohol, 2 to 10 wt% of xanthan gum, 2 to 10 wt% of methylene chloride, 2 to 10 wt% of a water-soluble carbonate, and the remainder being water, by means of a composite carrier. The organic matter decomposition, nitrification, and phosphorus uptake of the influent water are carried out, and the influent water is discharged to the final sedimentation tank without being returned to the anoxic tank again, and the sludge in the final sedimentation tank undergoes phosphorus release under anaerobic conditions in the sludge storage tank, and is partially returned to the anoxic tank while simultaneously using a stirrer to cause denitrification and phosphorus release to occur simultaneously.

[0050] In addition, it is desirable for the waste treatment device to include an oil separator for separating oil.

[0051] In addition, it is preferable for the debris treatment device to be equipped with a sedimentation screw for removing sediment, and after removing sediment by the sedimentation screw, to be equipped with a screen for removing debris remaining in the influent water from which sediment has been removed, and to remove debris using the screen. Effects of the invention

[0053] According to the wastewater treatment system using a debris treatment device equipped with an oil separator of the present invention, the debris is treated using the debris treatment device, and at the same time, oil is effectively separated and removed, thereby preventing damage to the composite carrier, and as a result, the wastewater treatment process becomes smooth and fast.

[0054] In addition, the present invention has the advantage of significantly improving the efficiency of the composite carrier by removing oil to prevent the pores of the composite carrier from becoming clogged, and can maximize the efficiency of sludge removal, organic matter decomposition, and removal of nitrogen and phosphorus, and can increase the treatment efficiency of the influent by shortening the retention time of the influent.

[0055] In addition, even if the concentration of the influent water is below or above the standard value, the rotation speed of the carrier rotating machine filled with the composite carrier can be automatically adjusted to achieve a constant level of treatment. Brief explanation of the drawing

[0057] FIG. 1 is a schematic diagram showing a wastewater treatment system using a debris treatment device equipped with an oil separator according to the present invention. FIG. 2 is a block diagram showing a wastewater treatment system using a debris treatment device equipped with an oil separator of the present invention. FIG. 3 is a front view showing the structure of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention. FIG. 4 is an exploded assembly view showing the structure of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention. FIG. 5 is an enlarged view showing the structure of the side plate portion of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention. FIG. 6 is an exploded cross-sectional view of the rotating shaft unit of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention. FIG. 7 is an installation diagram showing the state in which a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention is installed in a sewage treatment facility. FIG. 8 is a partial enlarged view showing the structure of the fixing device part of FIG. 7. FIG. 9 is a process diagram showing a wastewater treatment method of a wastewater treatment system using a debris treatment device equipped with an oil separator of the present invention. Specific details for implementing the invention

[0058] The following objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

[0059] Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the spirit of the invention is sufficiently conveyed to those skilled in the art.

[0060] The embodiments described and illustrated herein also include complementary embodiments.

[0061] In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. Components referred to as 'comprise' and / or 'comprising' as used in this specification do not exclude the presence or addition of one or more other components.

[0062] Hereinafter, specific embodiments according to the wastewater treatment method of a wastewater treatment system using a wastewater treatment device equipped with an oil separator of the present invention will be described.

[0063] FIG. 1 is a schematic diagram showing a wastewater treatment system using a debris treatment device equipped with an oil separator according to the present invention, FIG. 2 is a block diagram showing a wastewater treatment system using a debris treatment device equipped with an oil separator according to the present invention, and FIG. 3 is a front view showing the structure of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention.

[0064] Also, FIG. 4 is an exploded assembly view showing the structure of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention, FIG. 5 is an enlarged view showing the structure of a side plate portion of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention, and FIG. 6 is an exploded cross-sectional view of a rotating shaft unit portion of a carrier rotor equipped with a composite carrier used in the wastewater treatment system of the present invention.

[0065] In addition, FIG. 7 is an installation diagram showing the state in which a carrier rotating machine equipped with a composite carrier used in the wastewater treatment system of the present invention is installed in a sewage treatment facility, FIG. 8 is a partial enlarged view showing the structure of the fixing device part of FIG. 7, and FIG. 9 is a process diagram showing a wastewater treatment method of a wastewater treatment system using a debris treatment machine equipped with an oil separator of the present invention.

[0066] Referring to FIGS. 1 to 9, a wastewater treatment system using a debris treatment device equipped with an oil separator according to the present invention will be described. First, referring to FIG. 1, the advanced wastewater treatment facility has an oil separator (201) connected to a debris treatment device (203) to remove oil mixed in the wastewater when the wastewater flows in. The debris treatment device (203) includes a sedimentation screw for removing sediment and a screen for removing debris.

[0067] The above-mentioned debris treatment device (203) first removes oil contained in the incoming wastewater using the oil separator (201), and the wastewater that has passed through the oil separator (201) removes sediment mixed in the wastewater using a sedimentation screw consisting of a screw-type remover, and continuously transfers the wastewater from which sediment has been removed to a screen, and as the wastewater from which sediment has been removed passes through the screen, the debris is removed.

[0068] The above wastewater treatment system includes an oil separator for removing oil mixed in the influent, a debris treatment device for removing various impurities, and a carrier rotating device equipped with a composite carrier for attaching, multiplying, and activating microorganisms.

[0069] Subsequently, the system is arranged in a distribution tank, an anaerobic tank, an aerobic tank, a sludge storage tank, a sedimentation tank, and a discharge tank. The wastewater treatment method of the wastewater treatment system using a debris treatment device equipped with an oil separator according to the present invention involves installing a carrier rotor equipped with a composite carrier in the aerobic tank so that it can rotate, and the carrier rotor is installed to rotate in the opposite direction to the inflow direction of the influent water. The oil is removed to prevent oil from entering through the carrier rotor, and debris is treated during the pretreatment stage.

[0070] When the influent flows into the aerobic tank, the carrier rotor equipped with a composite carrier is driven to rotate in the opposite direction to the inflow of the influent into the aerobic tank. Consequently, the influent flows in the opposite direction while receiving flow resistance from the carrier rotor, and at the same time mixes by surging upwards, forming turbulence, and the contact between the microorganisms attached to the carrier and the organic matter contained in the influent and the air occurs more efficiently.

[0071] Meanwhile, a concentration sensor for measuring the concentration of the influent water is installed at the inlet of the above-mentioned aeration tank. After the concentration sensor detects the concentration of the influent water, it transmits the signal to the control unit, and the control unit sends a speed control signal to the reduction gear of the above-mentioned driving means.

[0072] That is, speed control is performed such that when the concentration of the influent water flowing into the aerobic tank is detected as high, the rotational speed of the composite carrier (200) is increased, and when it is detected as low, the rotational speed of the composite carrier (200) is decreased.

[0073] In this state, as the carrier rotor (100) rotates at high speed or low speed depending on the concentration of the inflow water, the inflow water flows into the interior through the passage (space between support plates) formed in the carrier rotor (100), and at the same time flows into the interior through the inflow holes of a plurality of carrier units (112) arranged inside the carrier rotor (100), and eventually the inflow water smoothly seeps into the composite carrier (200) filled inside each carrier unit (112).

[0074] At this time, even if the composite carriers (200) within the carrier unit (112) are subjected to external force (vibration during rotational driving of the carrier rotor), they are inserted and installed inside the carrier unit body and remain firmly fixed, thereby reducing contact friction between them and minimizing wear of the composite carriers (200).

[0075] In this way, when the influent water passes through the composite carrier (200) filled inside the carrier unit (112), microorganisms are attached to the composite carrier (200), which has openings and closed pores formed with a diameter of 50 to 500 micrometers suitable for the habitat of microorganisms, and rotate in the opposite direction to the influent water, so the contact efficiency is very high and the adsorption capacity of pollutants is very excellent, so the decomposition of organic matter and the uptake of nitrogen and phosphorus occur easily.

[0076] The present invention focuses on dividing the biological reactor into the anaerobic tank and the aerobic tank, and utilizing a carrier rotating device in which a carrier unit filled with a composite carrier is assembled along the circumferential direction and immersed in the aerobic tank.

[0077] By using such an anaerobic tank and an aerobic tank immersed with a carrier rotating device, it is possible to treat influent water with a low influent BOD of 80-120 mg / L in current sewage treatment plants adopting combined sewer systems, increase the sludge return rate to 70-153% to increase denitrification in the anaerobic tank placed upstream of the aerobic tank, and remove phosphorus by biological treatment in the aerobic tank.

[0078] The wastewater treatment system of the present invention is arranged and installed in the order of an oil separator (201) - a debris treatment unit (203) - a distribution tank (202) - an anaerobic tank (204) - an aerobic tank (206) - a sedimentation tank (208) - a sludge storage tank (210) - a discharge tank (212).

[0079] At this time, the above-mentioned anaerobic tank (204) and aerobic tank (206) are configured as independent spaces separated from each other as biological reactors, and in particular, a carrier rotating machine (100) in which a carrier unit (112) filled with a composite carrier is assembled along the circumferential direction is immersed in the above-mentioned aerobic tank (206).

[0080] Referring to FIG. 2, FIG. 2 is a block diagram showing a wastewater treatment system using a waste treatment device equipped with an oil separator of the present invention. When wastewater is introduced, it is transferred to an oil separator (201), and the oil mixed in the wastewater is separated in the oil separator (201).

[0081] The wastewater from which the above oil has been separated is transferred to a waste treatment unit (203).

[0082] And in the above-mentioned debris treatment device (203), sedimentation substances mixed in the wastewater are filtered out using a sedimentation screw, and debris is filtered out from the wastewater from which sedimentation substances have been filtered using a screen.

[0083] Afterwards, it is transferred to a carrier rotor (100) to perform carrier treatment, which involves depositing and activating microorganisms within the aerobic tank (106) while passing through a distribution tank (202), an anaerobic tank (204), an aerobic tank (206), and a sedimentation tank (208).

[0084] Referring to FIG. 3, the carrier rotating machine (100) of the present invention comprises a rotating shaft body (10), a rotating shaft unit section (102, 103) for rotating the rotating shaft body (10) to rotate a carrier unit (112), first and second inner plate unit sections (104, 105), first and second outer plate unit sections (106, 107), first and second fixed units (108, 109), a plurality of support plate units (110) and carrier units (112), and a composite carrier (200) provided on the carrier unit (112).

[0085] Rotating shaft unit parts (102, 103) that rotate around the center of the above-mentioned rotating shaft body (10) are installed at the left end and right end, respectively, and a first inner plate unit part (104) is fixedly installed in the rotating shaft unit part (102) at the left end, and a second inner plate unit part (105) is fixedly installed in the rotating shaft unit part (103) at the right end, symmetrically with respect to the first inner plate unit part (104).

[0086] A first outer plate unit (106) is fixedly installed on the outer side of the first inner plate unit (104), and a second outer plate unit (107) of the second inner plate unit (105) is fixedly installed.

[0087] In addition, a plurality of support plate units (110) are provided at regular intervals in the rotational shaft unit portions (102, 103), and it is preferable that they are installed by being fitted vertically into the rotational shaft body (10).

[0088] Meanwhile, the plurality of carrier units (112) are installed by being fitted horizontally into the edge portion of the support plate unit (110).

[0089] The plurality of carrier units (112) are installed so that as the rotation axis unit (102) rotates, the support plate unit (100) rotates, and at this time, the carrier units (112) coupled to the support plate unit (110) rotate together.

[0090] A composite carrier (200) is provided in the inner part of the above carrier unit (112).

[0091] The above composite carrier (200) is a composition for an organic-inorganic composite carrier for microorganism immobilization with improved physical properties including adsorption performance of microorganisms, comprising 19 to 29 weight% of an inorganic adsorption material selected from Type A zeolite powder or coconut-based powdered activated carbon, 25 to 45 weight% of a thermoplastic resin with a melting point of less than 200°C, 3 to 12 weight% of montmorillonite-based clay, 3 to 12 weight% of polyvinyl alcohol, 2 to 10 weight% of xanthan gum, 2 to 10 weight% of methylene chloride, 2 to 10 weight% of water-soluble carbonate, and the remainder being water.

[0092] The above thermoplastic resin provides a composition for an organic-inorganic composite carrier for microbial immobilization, characterized by being a mixture of polyethylene wax and polybutylene succinate or polyvinyl chloride in a weight ratio of 1:0.1 to 0.3.

[0093] The above-described inorganic adsorption material provides a composition for an organic-inorganic composite carrier for microbial immobilization, characterized by having an average particle size of 1 to 10 μm.

[0094] The present invention provides a composition for an organic-inorganic composite carrier for microbial immobilization, characterized in that the above-mentioned montmorillonite-based clay is sodium-based bentonite, and the above-mentioned water-soluble carbonate is selected from alkali metals and alkaline earth metals.

[0095] The present invention provides a microbial immobilization organic-inorganic composite carrier composition characterized by using sodium bicarbonate powder as the above-mentioned water-soluble carbonate.

[0096] If the average particle size of the above inorganic adsorption material is less than 1 μm, bridges are formed between the particles, making it difficult to transport the raw material during the manufacturing process, and if it exceeds 10 μm, a problem arises where molding is difficult.

[0097] The above-mentioned inorganic adsorbent is used in an amount of 19 to 29 weight percent based on the total weight of the composition. If the amount used is less than 19 weight percent, the organic matter adsorption capacity decreases, making it difficult for microorganisms to attach, and if it exceeds 29 weight percent, the mechanical strength decreases and the carrier collapses in water.

[0098] The above thermoplastic resin is used as a binder and melts and sublimes during the manufacturing process of the composite carrier to form pores inside the carrier, and it is preferable that the melting point be less than 200°C. If the melting point exceeds 200°C, energy consumption increases, leading to higher manufacturing costs, and not only is an odor generated during manufacturing, but there is also a risk of ignition.

[0099] The above thermoplastic resin is preferably a mixture of polyethylene wax and polybutylene succinate or polyvinyl chloride in a weight ratio of 1:0.1 to 0.3.

[0100] The above polybutylene succinate is a polyester-based thermoplastic polymer resin, and it is preferable to use a biodegradable aliphatic ester.

[0101] The above thermoplastic resin is used in an amount of 25 to 45 weight percent based on the total weight of the composition. If the amount is less than 25 weight percent, it is difficult to form pores and maintain sufficient mechanical strength, and if the amount exceeds 45 weight percent, the carriers stick together during the drying process, causing a problem that makes it difficult to manufacture the carriers. The above polyethylene wax may be used.

[0102] It is preferable to use 3 to 12 weight percent of the above sodium-based bentonite; if less than 3 weight percent, molding is impossible, and if more than 12 weight percent, cracking and collapse of the carrier are caused by the swelling characteristics of the bentonite in water.

[0103] The above polyvinyl alcohol is used as a plasticizer for thermoplastic resins and increases the adsorption capacity of microorganisms, and it is preferable to use it in an amount of 3 to 12 weight percent based on the weight of the total composition.

[0104] The above xanthan gum is a mixture produced by injecting carbohydrates into plant fungi and fermenting them, and is used as a dispersant. It provides a synergistic effect in terms of viscosity and microbial adsorption of organic-inorganic composite carriers, and its content is preferably 2 to 10 weight percent based on the weight of the total composition.

[0105] The methylene chloride is used as a solvent for the thermoplastic resin and increases the adsorption capacity of microorganisms, and its content is preferably 2 to 10 weight percent based on the weight of the total composition.

[0106] Continuing with reference to FIGS. 4 to 6, the rotational shaft unit (102, 103) is installed on the left and right sides, respectively, and is composed of a cylindrical rotational shaft body (10, 10a).

[0107] The above-mentioned rotating shaft body (10) is installed on the left side, and the above-mentioned rotating shaft body (10a) is installed on the right side.

[0108] A central shaft (11) is installed horizontally between the above-mentioned rotating shaft body (10) and the rotating shaft body (10a), and a cylindrical central shaft (11) is installed horizontally in the middle section between the above-mentioned rotating shaft body (10) and the rotating shaft body (10a).

[0109] The right end of the rotating shaft body (10) and the left end of the central shaft (11) are positioned to face each other so that their surfaces come into contact, and the left end of the rotating shaft body (10a) and the right end of the central shaft (11) are installed to come into contact with each other.

[0110] A first inner plate unit (104) is coupled to the above-mentioned rotating shaft unit (102), and a first outer plate unit (106) is fixedly installed on the outer side of the first inner plate unit (104). A first fixed unit (108) is coupled to the right side of the first inner plate unit (104) by being fitted to the outer side of the rotating shaft unit (102) and the central shaft (11).

[0111] And a first inner plate unit (105) is coupled to the rotational shaft unit (103), and a first outer plate unit (107) is fixedly installed on the outer side of the first inner plate unit (105), and a first fixed unit (109) is coupled to the right side of the first inner plate unit (105) by being fitted to the outer side of the rotational shaft unit (103) and the central shaft (11).

[0112] At the same time, a plurality of support plate units (110) formed in a disc shape are installed vertically on the central axis (11) while maintaining a constant spacing, and a plurality of carrier units (112) are installed horizontally on the edge portions of the support plate units (110).

[0113] Looking more specifically, as shown in FIGS. 6 and 7, the rotating shaft body (10, 10a) is made of a cylindrical body and has a flange portion (12) formed on the right side, a rear shaft body (14) is formed on the right side of the flange portion (12), and a plurality of fixing holes (15) are formed on the outer surface of the rear shaft body (14).

[0114] A first fixed pipe body (16) and a second fixed pipe body (22) made of a hollow material are connected to the outer part of the rear shaft body (14), and the first fixed pipe body (16) and the second fixed pipe body (22) are coupled and fixed to the outer part of the rear shaft body (14) and the central shaft (11).

[0115] The right side of the first fixed pipe body (16) and the left side of the second fixed pipe body (22) are positioned to be in contact with each other, and a fixing means (30) is fixed to the upper and lower parts of the first fixed pipe body (16) and the second fixed pipe body (22).

[0116] The first fixed pipe body (16) has a plurality of fixing holes (18) that penetrate vertically and a coupling hole (20) that penetrates horizontally, and the second fixed pipe body (22) also has a plurality of fixing holes (18) that penetrate vertically and a coupling hole (20) that penetrates horizontally.

[0117] A rear body (14) is fitted and coupled to the left side of the first fixed pipe body (16) formed as described above, and a central shaft (11) with a coupling hole (26) formed therein is fitted and coupled to the right side of the second fixed pipe body (22).

[0118] A plurality of fixing holes (28) are formed on the outer surface of the outer side and right end of the central shaft (11), and fixing means (30), such as bolts, nuts, screws, and rivets, are fixedly installed in the fixing holes (28).

[0119] Meanwhile, a first inner plate unit (104) is coupled and installed on the above-mentioned rotating shaft body (10), and a first outer plate unit (106) is coupled and installed on the outer part of the first inner plate unit (104), and a first fixed unit (108) is installed on the right side of the first inner plate unit (104) and the first outer plate unit (106).

[0120] The first inner plate unit (104) is composed of a disc-shaped panel body (32), and an axial coupling hole (34) that penetrates left and right is formed in the central part, and a fixing groove (36) is formed in the inner direction of the right side of the panel body (32).

[0121] It is preferable that a rotating panel (38), which is formed in the shape of a disc and has a shaft coupling hole (40) formed by penetrating the central part from left to right, be fused and fixed to the fixed groove (36), and that the rotating panel (38) has a plurality of fused parts in the part that contacts the fixed groove (36).

[0122] That is, after inserting the rotating panel (38) into the fixed groove (36), a fusion section is formed using welding. At this time, the upper right side of the rotating panel (38) is welded and fixed to form a first fusion section, and the area in contact with the central shaft coupling hole (40) is welded and fixed. The area where the outer surface of the rotating shaft body (10), the inner surface of the panel body (32), and the inner surface of the rotating panel (38) come into contact with each other is welded and fixed to form a second fusion section. The area where the inner surface of the central right side of the rotating panel (38) and the outer surface of the rotating shaft body (10) come into contact with each other is welded and fixed to form a third fusion section. It is preferable that the panel body (32) and the rotating panel (38) are fixed to the rotating shaft body (10) and installed so that they rotate together.

[0123] Next, a panel body (42) is inserted and installed on the inner side of the right side of the first outer plate unit (106), and a first fixing unit (108) is installed on the right side of the first outer plate unit (106), and the first outer plate unit (106) is fixedly installed by means of a fixing means (49) provided on the left side of the first fixing unit (108).

[0124] The first outer plate unit (106) is formed with a panel body (42) in the shape of a disc, and a cross hole (44) penetrating from left to right is formed in the central part of the panel body (42), and an outer plate body (46) is formed on the upper and lower parts of the left side of the panel body (42), and a plurality of fixing means (48) are installed to fix the panel body (42) to the carrier unit (112).

[0125] The panel body (32) of the first inner plate unit (104) described above is inserted and installed in the above-mentioned judgment joint (44), and is configured so that the separation and replacement of the first inner plate unit (104) are easy.

[0126] A first fixing unit (108) is installed on the right side of the first inner plate unit (104), and the first fixing unit (108) is formed in a triangular shape, and a cylindrical central body (50) is formed in the central part, and an axis coupling hole (52) is formed in the center of the central body (50) to penetrate left and right and to connect the central axis (11), and a plurality of vertical fixing plates (54) made of triangular plates are fixedly installed on the upper and lower parts of the central body (50).

[0127] And a disc-shaped panel body (56) is formed on the left side of the central body (50), and a fixing groove (58) is formed on the left inner side of the panel body (56).

[0128] A rotating panel (60) is inserted and installed in the above fixed groove (58). The rotating panel (60) is formed in the shape of a disc, and a shaft coupling hole (62) is formed in the central part that penetrates left and right to be coupled with the central shaft (11).

[0129] The above-mentioned rotating panel (60) is fitted onto the outer surface of the flange portion (12) of the rotating shaft body (10), and a fourth fusion portion is formed at the upper and lower portions of the rotating panel (60), a fifth fusion portion is formed at the portion in contact with the flange portion (12), and a sixth fusion portion is formed at the rear portion of the fifth fusion portion.

[0130] It is preferable that each of the above fusion parts be formed by CO2 welding.

[0131] The rotating shaft unit (102) installed as described above is rotated together with the first inner plate unit (104), the first outer plate unit (106), and the first fixed unit (108) by an unillustrated power source, and rotates together with the carrier unit (112) connected and fixed by the support plate unit (110).

[0132] In addition, the outer surface of the first inner plate unit (104) and the inner surface of the first outer plate unit (106) are installed to maintain a predetermined gap, and it is preferable that the predetermined gap be 3-8 mm. If it is smaller than 3 mm, interference and wear occur, making assembly and installation difficult, and if it is larger than 8 mm, the gap is too wide, so the connection and fixation with the first fixing unit (108) is not made accurately and firmly.

[0133] At the same time, the first rotational shaft unit (102) and the first inner plate unit (104) can be separated and replaced. That is, the first outer plate unit (106) that fixes the side portion of the carrier unit (112) can detach the first rotational shaft unit (102) by releasing the fixing means (49).

[0134] At the right end of the central shaft (11), the rotational shaft unit (103) is configured to be symmetrical to the structure described above, such that the first inner plate unit (105), the first outer plate unit (107), and the first fixed unit (109) rotate together by an unillustrated power source and rotate together with the carrier unit (112) connected and fixed by the plurality of support plate units (110).

[0135] Meanwhile, the plurality of support plate units (110) into which the carrier unit (112) is fitted are composed of a support plate body (64) formed in a circular shape and a plurality of carrier coupling holes (66) formed by penetrating the support plate body (64) from left to right and arranged in a circular shape, and the plurality of carrier units (112) are fitted into each correspondingly in the carrier coupling holes (66) while arranged in a circular shape.

[0136] The above carrier unit (112) has a carrier unit body (68) formed in a cylindrical shape with a hollow interior, and a plurality of carrier holes (70) are formed in the carrier unit body (68), and a plurality of composite carriers (200) are accommodated in the carrier unit body (68).

[0137] The above carrier hole (70) is formed to penetrate the inside and outside of the carrier unit body (68) and is formed to allow free inflow and outflow of sewage.

[0138] Each carrier cover (72) is fixed to the left and right sides of the carrier unit body (68) to prevent the composite carrier (200) from slipping out, and a plurality of fixing brackets (74) formed in an L-shape are fixed to the inner side of the carrier cover (72). The fixing brackets (74) are fixed by fixing means (74) such as bolts, nuts, screws, and rivets.

[0139] At this time, a plurality of guide pipes (78) are installed on the outer part of the carrier unit body (68) to surround the carrier unit body (68).

[0140] The guide pipe (78) has a hollow inner section, and a reinforcing rod (80) in the form of a long, thin rod is inserted into the inner section of the hollow section to firmly hold the carrier unit body (68).

[0141] And, the aforementioned first outer plate unit (106, 107) is fixedly installed on the left and right sides of the guide pipe (78).

[0142] In the first outer plate unit (106, 107), as an embodiment, a plurality of vortex holes (84) and vortex inlet holes (86) are formed, and the vortex holes (84) are formed in a wavy shape to induce smooth inflow of sewage, and the vortex inlet holes (86) are formed as triangular through holes to guide sewage from the outside to flow smoothly into the carrier unit (112). That is, sewage passes through the first outer plate unit (106, 107) and flows into the interior, and the inflowed sewage passes through the carrier hole (70) of the carrier unit (112) and is chemically reacted by the composite carrier (200) inside the carrier unit.

[0143] FIG. 7 is a drawing showing the state in which a wastewater treatment method using a wastewater treatment system equipped with an oil separator of the present invention is installed in a sewage treatment facility, and FIG. 8 is an enlarged view showing the structure of the fixing device part of FIG. 7. As shown in FIG. 7 and FIG. 8, first, the right end of the rotating shaft unit part (103) is fixedly installed on the structural wall (300), and the left end of the rotating shaft unit part (102) is also fixedly installed on the structural wall (300).

[0144] A fixing device (114) is fixedly installed at the right end of the above-mentioned rotating shaft unit (103), and a sprocket (82) is coupled to the above-mentioned rotating shaft body (10), and a chain sensing device (116) is provided on the sprocket (82).

[0145] The above fixing device part (114) is fixedly installed on the structural wall (300) by means of an anchor bolt (302).

[0146] At this time, a sprocket (82) is fitted and fixedly installed on the right end portion of the rotating shaft body (10), and a chain (88) is connected to the sprocket (82).

[0147] The above chain (88) is connected to and installed with a driving source such as an unillustrated motor and rotates, and transmits the rotational force to the sprocket (82) to rotate the sprocket, and the sprocket (82) rotates the rotating shaft unit part (103) having the body (10) of the rotating shaft.

[0148] As the above-mentioned rotating shaft unit (103) rotates, the central shaft (11) connected to the above-mentioned rotating shaft unit (103) rotates, and as the central shaft (11) rotates, the rotating shaft unit (102) connected and fixed to the other end rotates together.

[0149] In addition, as described above, the first inner plate unit (104) and the first fixed unit (108) are fixed to the flange portion (12) and the rear shaft body (14) by means of fixing means in the above-described rotating shaft unit portion (102)(103) so that rotation occurs simultaneously, and a plurality of support plate units (110) are installed at regular intervals on the central shaft (11), and a plurality of carrier units (112) described above are fitted and fixed to the edges of the support plate units (110).

[0150] At the same time, it is preferable that a first outer plate unit (106) be fitted and installed so as to be rotatable on the side portion of the carrier unit (112) fitted into the support plate unit (110), thereby fixing and supporting the plurality of carrier units (112) and positioning it on the outer surface of the first inner plate unit (104).

[0151] As it is installed as described above and rotated by the chain (88) and sprocket (82), when the rotation shaft body (10) and the central shaft (11) rotate, eccentric rotation of the central shaft (11) occurs due to the weight of the carrier unit (112), and accordingly, the chain (88) that transmits the rotational driving force may twist, bend, or sway left and right, causing vibration and noise.

[0152] In this way, a chain sensing device (116) for controlling the chain (88) so as to detect abnormal operation and adjust or stop it is provided on the outer side of the chain (88).

[0153] The chain sensing device (116) comprises a rectangular sensor housing (90) formed to surround the chain (88), a plurality of sensing means (92, 93) installed facing each other on the inner upper part of the sensor housing (90), and a control unit (99) that checks and controls the state detected by the sensing means (92, 93).

[0154] The above sensing means (92, 93) can be installed in four or more directions (front, back, left, and right) and furthermore, can be installed to form a circular arrangement. In this case, it is preferable to install multiple means facing each other in pairs at intervals of 15 to 30 degrees to form the circular spacing.

[0155] When the chain (88) installed as described above detects movement by the detection means (92, 93), it transmits data according to the detected signal to the control unit (99), and the control unit (99) receives the transmitted data and controls rotational operations such as reducing or stopping the rotational speed of the carrier rotor, and can adjust the tension of the chain (88) connected to the sprocket (82) using a tension regulator.

[0156] The carrier rotating device (100) described above is installed in the aeration tank (206) to rotate in the opposite direction to the inflow direction of the inflow water.

[0157] Meanwhile, a plurality of composite carriers are filled inside the carrier unit (112) included in the carrier rotating machine (100). These composite carriers utilize the "microorganism immobilization organic-inorganic composite carrier" that was jointly filed and registered (Registration No. 0481973) by the applicant of the present invention and the Korea Research Institute of Chemical Technology. They are microorganism composite carriers manufactured by mixing an inorganic material and an organic material containing a polymer with a pore-forming agent, molding, and reacting.

[0158] As such, the wastewater treatment method of the present invention, which is carried out using an anaerobic tank (204), an aerobic tank (206), and a carrier rotating machine (100) immersed in the aerobic tank (206), is as follows.

[0159] When wastewater containing oil and sediment and various impurities flows in, it first passes through an oil separator (201), and after removing oil in the oil separator (201), the influent water is transferred to an impurity treatment unit (203).

[0160] Since sediment and various impurities remain in the wastewater from which the above oil has been removed, the above impurity treatment device (203) is used to remove the sediment and impurities. Then, the influent water from which the sediment and impurities have been removed is transferred to the distribution tank (202).

[0161] Influent water with a low influent BOD of 80-120 mg / L is introduced through the distribution tank (202) and then introduced into the anoxic tank (204).

[0162] Accordingly, the influent water and the returned sludge are mixed by the stirring action of the stirrer installed in the above-mentioned anoxic tank (204), and a denitrification reaction occurs, thereby increasing the nitrogen removal efficiency.

[0163] Next, the influent flows from the above-mentioned anaerobic tank (204) into the aerobic tank (206). As the influent flows into the aerobic tank (206), several carrier rotors (100) installed horizontally in the aerobic tank (206) rotate in the opposite direction to the direction of influent flow.

[0164] Accordingly, the decomposition of organic matter in the influent water and the intake of phosphorus are carried out by microorganisms attached to the composite carrier filled inside the carrier rotor (100).

[0165] More specifically, speed control is performed such that when the concentration of the influent water flowing into the aerobic tank (206) is detected as high concentration with excessive sludge attachment, the rotation speed of the carrier rotor (100) is increased, and when the concentration of the influent water is detected as low concentration with no sludge attachment, the rotation speed of the carrier rotor (100) is decreased. Thus, while the carrier rotor (100) is rotating at high or low speed depending on the concentration of the influent water, the influent water flows into the interior through the holes of several carrier units arranged inside the carrier rotor (100), and eventually, the influent water seeps into the composite carrier filled inside each carrier unit (112).

[0166] Accordingly, when the influent water passes through the composite carrier filled inside the carrier unit (112), microorganisms attach to the composite carrier, which has open / closed pores formed with a diameter of 50 to 500 μm suitable for the habitat of microorganisms, and rotate in the opposite direction to the influent water, so the contact efficiency is very high and the adsorption capacity of pollutants is very excellent, so the decomposition of organic matter and the intake of nitrogen and phosphorus occur easily.

[0167] At this time, the NH3-N contained in the influent water flowing into the aerobic tank (206) is converted into NO3-N by the nitrifying microorganisms attached to the composite carrier.

[0168] Next, the influent treated in the aerobic tank (206) is discharged to the discharge tank (212) via the sedimentation tank (208), and a portion of the sludge from the final sedimentation tank (208) is returned to the distribution tank (202) from the sludge storage tank (210).

[0169] That is, the influent water treated in the aerobic tank (206) enters the sedimentation tank (208) and is collected by a sludge collector installed at the bottom of the tank, and is collected in a sludge storage tank (210) that is connected to the sedimentation tank (208), and this sludge is returned to the distribution tank with a sludge return rate of at least 50% and at most 130%.

[0170] Next, NO3-N contained in the sludge returned to the distribution tank (202) is introduced into the anoxic tank (204) and denitrified by denitrifying microorganisms, thereby further improving the nitrogen removal efficiency.

[0171] Accordingly, in the case of influent water with low influent BOD, the sludge is returned to the distribution tank (202) as described above, and the sludge is re-introduced into the anoxic tank (204) located at the front end of the aerobic tank (206), thereby increasing the nitrogen removal efficiency through the denitrification reaction of the anoxic tank (30).

[0172] An example of comparing the processing efficiency of the present invention is as follows.

[0173] Measurement items existing new Inflow water (Before processing) Discharge (After processing) Removal efficiency [%] Inflow water (Before processing) Discharge (After processing) Removal efficiency [%] BOD[mg / L] 211.8 8.4 96.0 165.4 1.04 99.4 COD[mg / L] 80.0 9.1 88.6 112.1 7.32 93.5 TOC[mg / L] - - - 85.5 5.56 93.5 SS[mg / L] 137.5 3.6 97.4 197.1 2.09 98.9 TN[mg / L] 38.49 9.03 76.5 44.9 8.59 80.9 TP[mg / L] 5.73 0.14 97.6 13.5 0.16 98.8

[0174] Furthermore, FIG. 9 is a process flow diagram showing a wastewater treatment method of a wastewater treatment system equipped with an oil separator according to the present invention. The method includes a wastewater treatment step (S10) equipped with an oil separation function to separate impurities, sediment, and oil mixed in the treated water as the treated water is introduced, and a step (S30) of treating a carrier using a carrier rotor.

[0175] The above-mentioned impurity treatment step (S10) equipped with an oil separation function comprises a step (S20) of separating oil in the treated water using an oil separator, an impurity removal step (S22) of removing impurities from the treated water, and a step (S24) of removing sediment remaining in the treated water after removing the impurities.

[0176] To explain more specifically, when the treated water is introduced, the oil is separated from the mixture in the treated water using an oil separator (S20), the impurities remaining in the treated water from which the oil has been removed are separated and removed using an impurity treatment device (S22), and after removing the impurities, the sediment remaining in the treated water is removed using a sedimentation screw (S24).

[0177] The technical problems to be solved by the present invention are not limited to those mentioned above, and other unmentioned technical problems can be implemented in various ways by a person skilled in the art to which the present invention belongs based on the description below, and technical modifications within such scope shall be considered to be within the scope of the present invention. Explanation of the symbols

[0179] 10: Rotation axis body 11: Central axis 12: Flange section 14: Rear shaft body 16 : 1st fixed pipe 18 : Fixed hole 20 : Connecting hole 22 : Second fixed pipe 24 : Pipe 26 : Joint hole 28 : Fixing hole 30 : Fixing means 32: Panel body 34, 40, 52: Shaft coupling holes 36 : Fixed groove 38 : Rotating panel 42 : Panel body 44 : Panel joining hole 46: Outer plate body 48: Fixing means 50 : Central body 54 : Vertical fixing plate 56 : Panel body 58 : Fixing groove 60 : Rotating panel 62 : Shaft coupling hole 64 : Support plate body 66 : Carrier coupling hole 68 : Carrier unit body 70 : Carrier hole 72 : Cover 74 : Fixing means 76 : Fixing bracket 78 : Pipe 80 : Reinforcement rod 82 : Sprocket 84: Vortex hole 86: Vortex inlet hole 88 : Chain 90 : Sensor housing 92, 93: Sensing means 99: Control unit 100: Carrier Rotator 102, 103: Rotating Shaft Unit 104: 1st inner plate unit 105: 2nd inner plate unit 106: 1st outer plate unit 107: 2nd outer plate unit 108: 1st fixed unit 109: 2nd fixed unit 110: Support plate unit 112: Carrier unit 114: Fixed device section 116: Chain sensing device 200 : Composite carrier 201 : Oil separator 202 : Distribution tank 203 : Debris disposer 204: Anaerobic group 206: Aerobic tank 208: Sedimentation tank 210: Sludge storage tank 212: Discharge tank

Claims

Claim 1 In a wastewater treatment system comprising an oil separator (201), a debris treatment unit (203), a distribution tank (202), an anoxic tank (204), an aerobic tank (206), a sedimentation tank (208), a sludge storage tank (210), and a discharge tank (212), the wastewater treatment system comprises an oil separator for removing oil mixed in the influent water, a debris treatment unit for removing various debris, and a carrier rotary device equipped with a composite carrier for attaching, multiplying, and activating microorganisms, wherein the oil separator (201) is connected to the debris treatment unit (203) to remove oil mixed in the wastewater upon inflow, and the debris treatment unit (203) comprises a sedimentation screw for removing sediment and a screen for removing debris, and the debris treatment unit (203) removes the oil contained in the inflowing wastewater The wastewater that has passed through the oil separator (201) is removed using an oil separator (201), and the sedimentation substances mixed in the wastewater are removed using a sedimentation screw consisting of a screw-type remover, and the wastewater from which the sedimentation substances have been removed is continuously transferred to a screen, and the wastewater from which the sedimentation substances have been removed is installed so that impurities are removed as it passes through the screen, and the carrier rotating machine (100) is equipped with a rotating shaft body (10), and the rotating shaft body (10) rotates and the rotating shaft unit (102, 103) for rotating the carrier unit (112), first and second inner plate unit parts (104, 105), first and second outer plate unit parts (106, 107), first and second fixed units (108, 109), a plurality of support plate units (110) and carrier units (112), and is equipped on the carrier unit (112). A composite carrier (200) is included, wherein the rotational shaft body (10) is formed as a cylindrical body and a flange portion (12) is formed on the right side, a rear shaft body (14) is formed on the right side of the flange portion (12), and a plurality of fixing holes (15) are formed on the outer surface of the rear shaft body (14), and a rotational shaft unit portion (102) is formed on the left end and the right end to rotate around the rotational shaft body (10).Each of the 103) is installed, and a first inner plate unit (104) is fixedly installed on the rotation axis unit (102) of the left end, and a second inner plate unit (105) is fixedly installed symmetrically with respect to the first inner plate unit (104) on the rotation axis unit (103) of the right end, and a first outer plate unit (106) is fixedly installed on the outer side of the first inner plate unit (104), and a second outer plate unit (107) of the second inner plate unit (105) is fixedly installed, and a first fixed unit (108) is installed on the right side of the first inner plate unit (104) and the first outer plate unit (106), and the outer surface of the first inner plate unit (104) and the inner surface of the first outer plate unit (106) are installed to maintain a gap of 3-8 mm, and the A plurality of support plate units (110) are provided at regular intervals in the rotating shaft unit section (102, 103) and are installed by being fitted vertically into the rotating shaft body (10). A plurality of carrier units (112) are installed by being fitted horizontally into the edge section of the support plate unit (110). The plurality of carrier units (112) are installed so that as the rotating shaft unit section (102) rotates, the support plate unit (110) rotates and the carrier units (112) coupled to the support plate unit (110) rotate together. At the same time, a composite carrier (200) is provided in the inner section of the carrier unit (112). The composite carrier (200) has openings and closing pores with a diameter of 50 to 500 micrometers suitable for the habitat of microorganisms, to which microorganisms attach. As the carrier unit (112) rotates in the opposite direction to the inflow water, the contact efficiency is improved, and the decomposition of organic matter and The intake of nitrogen and phosphorus is facilitated, and the composite carrier (200) is a composition for an organic-inorganic composite carrier for microbial immobilization including microbial adsorption performance, comprising 19 to 29 weight% of an inorganic adsorption material selected from Type A zeolite powder or coconut-based powdered activated carbon, 25 to 45 weight% of a thermoplastic resin with a melting point of less than 200°C, and 3 to 12 weight% of montmorillonite-based clay.The composition comprises 3 to 12 wt% polyvinyl alcohol, 2 to 10 wt% xanthan gum, 2 to 10 wt% methylene chloride, 2 to 10 wt% water-soluble carbonate, and the remainder being water; the thermoplastic resin is a composition for an organic-inorganic composite carrier for microbial immobilization in which polyethylene wax and polybutylene succinate or polyvinyl chloride are mixed in a weight ratio of 1:0.1 to 0.3; the inorganic adsorption material has an average particle size of 1 to 10 μm; the montmorillonite-based clay is sodium-based bentonite; the water-soluble carbonate is selected from alkali metals and alkaline earth metals; sodium bicarbonate powder is used as the water-soluble carbonate; and a plurality of support plate units (110) into which the carrier unit (112) is fitted comprises a support plate body (64) formed in a disc shape and a circular shape formed by penetrating the support plate body (64) from left to right. It is composed of a plurality of carrier coupling holes (66) arranged in a circular manner, and a plurality of carrier units (112) are installed by being fitted into each correspondingly in the carrier coupling holes (66). The carrier unit (112) has a carrier unit body (68) formed in a cylindrical shape with a hollow interior, and a plurality of carrier holes (70) are formed in the carrier unit body (68). A plurality of composite carriers (200) are housed in the carrier unit body (68). The carrier holes (70) are formed to penetrate the interior and exterior of the carrier unit body (68) so that the inflow and outflow of sewage can be free. A carrier cover (72) is fixed to the left side and right side of the carrier unit body (68) to prevent the composite carrier (200) from escaping, and a plurality of fixed, L-shaped, carrier covers are fixed to the inner side of the carrier cover (72). A bracket (74) is fixed, and a plurality of guide pipes (78) are installed on the outer part of the carrier unit body (68) to surround the carrier unit body (68).The guide pipe (78) is formed with a hollow inner portion, and a reinforcing rod (80) in the form of a thin, long, round bar is inserted and installed in the inner portion of the hollow portion to firmly hold the carrier unit body (68). The right end of the rotational shaft unit (103) is fixedly installed on the structural wall (300), and the left end of the rotational shaft unit (102) is also fixedly installed on the structural wall (300). A fixing device (114) is fixed to the right end of the rotational shaft unit (103), and a sprocket (82) is coupled and installed on the rotational shaft body (10). A chain (88) is connected and installed on the sprocket (82), and a chain sensing device (116) is provided on the outer portion of the chain (88). The chain sensing device (116) comprises a rectangular sensor housing (90) formed to surround the chain (88) and the sensor A wastewater treatment system using a debris treatment device equipped with an oil separator, comprising a plurality of sensing means (92, 93) installed facing each other on the inner upper part of a housing (90), and a control unit (99) that checks and controls the state detected by the sensing means (92, 93); wherein the sensing means (92, 93) are installed in four or more locations in the front, back, left, and right directions and are installed to form a circular arrangement, and the angles forming the circular arrangement are installed to face each other at intervals of 15 to 30 degrees; and wherein when the chain (88) detects movement by the sensing means (92, 93), it transmits data according to the detected signal to the control unit (99), and the control unit (99) receives the transmitted data and adjusts the tension of the chain (88) connected to the sprocket (82) by controlling the rotational operation to reduce or stop the rotational speed of the carrier rotor. Claim 2 delete

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