KR102085280B1 - Method and system for processing high-dense organic wastewater by sequencing and batch type aeksangbusik process - Google Patents

Abstract

The present invention relates to a method for treating a high-concentration organic wastewater by a continuous batch liquid corrosion method, which comprises: a step of denitrifying NOx-N of a circulated liquid circulated from an aerobic liquid corrosion tank by a carbon source from an organic wastewater input from an anoxic liquid corrosion tank while circulating an anoxic liquid corrosion liquid input with the organic wastewater between the anoxic liquid corrosion tank and the aerobic liquid corrosion tank, and removing remaining organic matters of the circulated liquid circulated from the anoxic liquid corrosion tank to oxidze NH4-N to NOx-N in the aerobic liquid corrosion tank; a step of concentrating a liquid corrosion liquid treated in a liquid corrosion tank to separate the same into concentrated sludge and leachate; a step of controlling an MLSS concentration by returning the concentrated sludge to the liquid corrosion tank when the MLSS concentration of the liquid corrosion tank is measured, and is lower than a predetermined reference concentration, and returning the leachate to the liquid corrosion tank when the MLSS concentration of the liquid corrosion tank is greater than the reference concentration; a step of inputting an organic coagulant to the transferred concentrated sludge, and dehydrating the same; and a solid-liquid separation process performing step of inputting organic and inorganic coagulants into the leachate to coagulate the same, floating or precipitating sludge, and transferring treated water to a neutralization tank.

Description

METHOD AND SYSTEM FOR PROCESSING HIGH-DENSE ORGANIC WASTEWATER BY SEQUENCING AND BATCH TYPE AEKSANGBUSIK PROCESS}

The present invention relates to a high concentration organic sewage treatment method and treatment system by a continuous batch liquid erosion method which treats high concentration organic sewage such as livestock manure, phosphorus manure and food waste water by a liquid etching method by a continuous batch. It is an improved technology of 0769997.

Sewage or wastewater is mixed with liquid or solid dirty substances, including organic substances, nutrients (N, P, etc.), toxic substances, and suspending inorganic substances, which are released from human daily life and business activities. We say water which we cannot use for life and business activity of person in that state. Wastewater treatment facilities to reduce the amount or concentration of pollutants by applying various treatment methods to remove pollutants contained in such sewage or wastewater, to prevent contamination of rivers or lakes, and to protect the habitat environment of aquatic animals and plants. Is installing.

In general, a combination of physical, chemical, and biological treatment methods are employed to remove contaminants from wastewater treatment facilities. Physical treatment methods are mainly used for pretreatment or post-treatment, to reduce the amount of solids and contaminants, to protect machinery, and to keep the flow rate constant, such as screens, sump, settling basin, oil separator, sedimentation, concentration and filtration. You can go through the process. The chemical treatment method can detoxify and reduce specific pollutants in wastewater by using chemicals to treat hardly degradable organics and toxic substances through oxidation, reduction, decomposition and neutralization. And biological treatment method is mainly used as the main process of wastewater treatment, and the organic material in the influent can be stabilized or reduced through respiration, synthesis, and assetization using microorganisms.

Referring to FIG. 10, according to the present method of treating organic sewage in the continuous batch liquid erosion method of the applicant's previously filed patent No. 0767997, the organic sewage after removing coarse contaminants from the crude coarse sediment separator is removed. Temporarily store in the primary storage tank and transfer the primary storage tank liquid to the fine contaminant separator using a pump to remove fine contaminants. The organic sewage after removing coarse and fine contaminants is temporarily stored in a secondary storage tank, and then continuously added to an anoxic liquid corrosion tank to remove NOx-N (nitrogen nitrogen or nitrous nitrogen) in wastewater circulated in an aerobic liquid corrosion tank. The denitrified and untreated NH ₄ -N (ammonia nitrogen) in the anaerobic liquid corrosion bath is overflowed into the aerobic liquid corrosion bath. In the aerobic liquid corrosion tank, oxygen is supplied to the nitrifying microorganisms by using an acid apparatus to convert NH ₄ -N into NOx-N, thereby continuously circulating an anoxic liquid corrosion solution and an aerobic liquid corrosion solution.

The purified liquid corrosion solution is introduced into the solid-liquid separation process by the daily throughput in the liquid corrosion tank. At this time, MLSS (Mixed Liquor Suspended Solids) suspended solids concentration of more than 7,000mg / ℓ does not have good solid-liquid separation through natural sedimentation by gravity, the whole dehydration process through a dehydration facility. The dewatered sludge generated at this time is treated with waste and the dewatered liquid is introduced into a subsequent process. Subsequent processes are linked to the nearby sewage treatment plant through the filtration system. In the case of single discharge treatment, the suspended solids are removed from the filtration system, the COD reduction and sterilization disinfection are performed in the ozone treatment system, and the activated carbon filtration system is After the final single discharge.

However, in the conventional method of treating high concentration organic sewage, the following problems are encountered.

Firstly, when the liquid temperature in the liquid corrosion tank is 35 ± 5 ° C., the growth of microorganisms and decomposition of dirt are most active. However, in summer, as the atmospheric temperature rises, the temperature of the wastewater in the liquid corrosion vessel rises. When the temperature of the wastewater liquid exceeds 40 ° C., the microorganisms in the liquid corrosion vessel may be killed and normal treatment may not be possible.

However, when a separate cooling tower is installed to lower the temperature of the wastewater in the liquid corrosion tank, additional construction costs are required accordingly, and there is a problem in that space for installation thereof is additionally required. In addition, the existing cooling tower was located on the upper part of the liquid corrosion tank, which could cause scattering of the wastewater, and during the non-operation period (January-May, October-December), it acts as a stack to inject wastewater into the liquid corrosion tank. Can cause the spread of odor.

Second, according to the conventional method of treating high concentration organic sewage by the continuous batch liquid erosion method, if the MLSS concentration of the liquid erosion tank is lower than 7,000 mg / l or exceeds 15,000 mg / l, Was not provided. This causes a problem that the treatment efficiency is lowered, and in the case of low concentrations, the tank capacity of the liquid corrosion tank may be excessive, and in the case of high concentrations, there is a problem such as an increase in air volume.

In the case of the decrease of the MLSS concentration of the above problems, in the case of livestock manure, which is a representative wastewater of high concentration organic sewage, wastewater with a significantly low MLSS concentration of raw wastewater steadily occurs due to improved livestock raising environment and increased water consumption. In the case of the wastewater introduced after the septic tank, the SS concentration is low so that the MLSS concentration in the liquid corrosion tank cannot be maintained above 7,000 mg / L.

On the contrary, in the case where the MLSS concentration is increased, the wastewater temperature in the tank is maintained at about 30 to 40 ° C during the biological treatment in the liquid corrosion tank, which is caused by the difference between the external temperature and the air supplied into the tank. As water vapor is generated and water vapor is released into the atmosphere, the concentration of MLSS in the tank is steadily rising.

Third, in the existing solid-liquid separation process, the liquid-liquid solution has a high concentration of 7,000 mg / l or more, and the solid-liquid separation through the natural sedimentation by gravity is not good. Rough The dewatered sludge generated at this time is treated with waste and the dewatered liquid is introduced into a subsequent process.

In this process, the drug consumption and sludge generation of inorganic coagulant are increased due to PH buffering action due to high concentration of MLSS, and the belt press type dehydrator is mainly used. As a result, the initial investment cost and facility site area increased.

An aspect of the present invention is to provide a high concentration organic sewage treatment method and treatment system by a continuous batch liquid corrosion method that is provided with a multi-purpose temperature control device in the liquid corrosion tank to reduce the temperature of the stored waste water by blowing outside air. .

Another aspect of the present invention is to add a scattering prevention device to the multi-purpose temperature control device in a continuous batch liquid corrosion method that can prevent the scattering of liquids and diffusion of odor from the air discharged after heat exchange with the waste water in the liquid corrosion tank To provide a high concentration organic sewage treatment method and treatment system.

Another aspect of the present invention is to measure the concentration of the MLSS in the liquid corrosion tank while returning the concentrated sludge to the liquid corrosion tank at low concentrations and at a high concentration to return the desorption liquid to the liquid corrosion tank continuous continuous MLSS concentration in the liquid corrosion tank To provide a high concentration organic sewage treatment method and treatment system by a batch liquid corrosion method.

Another aspect of the present invention is to remove the SS by the organic coagulant only in the first dehydrator, and the inorganic coagulant in the chemical coagulation sedimentation filtration device having a second removal of the desorption solution with the flocculation reaction tank and the precipitation unit and the filter unit After flocculation using organic coagulant, the sedimentary solids are removed from the sediment and the suspended solids are removed from the filter, reducing the amount of inorganic coagulant and reducing the size of subsequent process equipment and civil structures. To provide a high concentration organic sewage treatment method and treatment system by liquid corrosion method. However, the problem to be solved by the embodiments of the present invention is not limited to the above-described problem can be variously extended within the scope of the technical idea included in the present invention.

In accordance with an embodiment of the present invention, a method for treating high concentration organic sewage by a continuous batch liquid erosion method includes: removing impurities contained in organic sewage, continuously introducing the organic sewage into an oxygen-free liquid corrosion tank, and the organic sewage. The NOx-N (quality of the circulating fluid circulated from the aerobic liquid corrosion tank circulated from the aerobic liquid corrosion tank using the organic wastewater introduced from the anoxic liquid corrosion tank as the carbon source while internally circulating the oxygen-free liquid corrosion solution into which the water was injected. Acidic nitrogen or nitrous nitrogen) and denitrification, and the aerobic liquid corrosion tank removes residual organic matter from the circulating fluid from the anoxic liquid corrosion tank to replace NH ₄ -N (ammonia nitrogen) with NOx-N (nitrogen nitrogen). Or oxidizing with nitrous acid nitrogen), concentrating the liquid corrosion solution treated in the liquid corrosion tank and concentrating sludge. Separating into a desorption liquid, measuring the concentration of mixed liquor suspended solids (MLSS) in the liquid corrosion tank and returning the concentrated sludge to the liquid corrosion tank when the concentration is lower than a predetermined reference concentration, and when the concentration is higher than the reference concentration, Controlling the MLSS concentration by returning the desorption liquid to the liquid corrosion tank, dehydrating by introducing an organic flocculant into the conveyed concentrated sludge, flocculating an inorganic flocculant and an organic flocculant into the desorbed desorption solution, and then flocculating the sludge. Performing a solid-liquid separation process to precipitate and transfer the treated water to the neutralization tank; performing ozonation treatment on the treated water using ozone; and filtering and discharging the suspended solids increased after the ozone oxidation treatment.

The embodiment further includes the step of reducing the elevated liquid temperature of the liquid corrosion solution in the aerobic liquid corrosion tank, the step of reducing the liquid temperature, the step of supplying air to the cooling tank of the upper portion of the liquid corrosion vessel, Extracting and spraying the wastewater in the liquid corrosion tank to the cooling tank, performing heat exchange by contacting the injected wastewater and the supplied air in the cooling tank, and discharging the air after the heat exchange. Process may be included.

The controlling of the MLSS concentration may include: extracting the liquid corrosion solution by the throughput per day, mechanically concentrating in the concentrator, separating the concentrated sludge and the desorption liquid, and measuring the MLSS concentration in the liquid corrosion tank by using an MLSS measuring instrument. It may further include.

The controlling of the MLSS concentration may include: returning the concentrated sludge from the concentrator to the liquid corrosion tank and transferring the desorption liquid to the filtrate tank when the measured MLSS concentration is lower than the reference concentration. When it is higher than the reference concentration, the process of returning the desorption liquid from the concentrator to the liquid corrosion vessel and conveying the concentrated sludge to the dehydrator, and when the measured MLSS concentration is the reference concentration, the concentrated sludge to the dehydrator and the desorption liquid May include a process of transferring to the filtered water tank.

The MLSS meter and the concentrator are signally connected to an integrated control panel, and the integrated control panel may calculate the required amount of the concentrated sludge or the desorption liquid to be returned to the liquid corrosion tank according to the MLSS concentration measured by the MLSS meter.

In the performing of the solid-liquid separation process, the flocculated liquid may be transferred to a chemical coagulation sedimentation filtration device or a pressure flotation device to precipitate or float the sludge.

The organic sewage from which the fine contaminants have been removed is introduced into an anaerobic liquid corrosion tank to maintain MLSS at 7,000 to 15,000 mg / l, and the volume ratio of the oxygen-free liquid corrosion tank and the aerobic liquid corrosion tank is 1: 2 to 4, and the aerobic liquid corrosion is performed. BOD / MLSS load of the bath is adjusted to 0.05 ~ 0.1kg / MLSS · d, TN / MLSS load of the liquid corrosion bath is 0.02 ~ 0.05kg / MLSS · d or less, SDNR is 2.0 ~ 4.0g-NOX-N / kg. MLVSS.hr, SNR can be adjusted to 1.0-2.0 g-NH4-N / kg.MLVSS.hr.

In accordance with another embodiment of the present invention, a high concentration organic sewage treatment system using a continuous batch liquid erosion method includes a crude sewage separator for removing coarse contaminants included in organic sewage, and connected to the rear end of the crude sewage separator and included in the organic sewage. A fine contaminant separator which removes the fine contaminants, an anoxic liquid corrosion tank and an aerobic liquid corrosion tank connected to the rear end of the fine contaminant separator, wherein the oxygen-free liquid corrosion solution into which the organic wastewater is injected is circulated between the oxygen-free liquid corrosion tank and the aerobic liquid corrosion tank. While denitrifying NOx-N (nitrogen nitrogen or nitrite nitrogen) of the circulating fluid circulated from the aerobic liquid corrosion tank using the organic wastewater introduced from the oxygen-free liquid corrosion tank as a carbon source, the aerobic liquid corrosion tank By removing residual organics in the circulating fluid from the oxygen-free liquid corrosion tank Elevated liquid temperature of the liquid corrosion solution in the aerobic liquid corrosion tank installed in the liquid corrosion tank and the liquid corrosion tank, which oxidizes NH ₄ -N (ammonia nitrogen) with NOx-N (nitrogen nitrogen or nitrite nitrogen). A temperature control device for reducing the pressure, connected to the rear end of the liquid corrosion tank to concentrate the liquid corrosion solution transferred from the liquid corrosion tank to separate the concentrated sludge and the desorption liquid, and to measure the MLSS concentration in the liquid corrosion tank to a predetermined reference concentration When lower, the concentrated sludge is returned to the liquid corrosion tank, and when the concentration is higher than the reference concentration, the MLSS control device for returning the desorption liquid to the liquid corrosion tank, and the organic flocculant to the conveyed concentrated sludge connected to the rear end of the MLSS control device. A dehydrator for input and dehydration, and an inorganic coagulant and an organic coagulation agent in the dehydrating dehydration liquid connected to a rear end of the dehydrator A solid-liquid separator for flocculation and flocculation by flocculation and then flocculation and settling of the sludge, and transfer of the treated water to a neutralization tank, an ozone processor connected to a rear end of the solid-liquid separator, for ozonizing the treated water using ozone, and the ozone It is connected to the rear end of the processor comprises a filter for filtration and discharge of the suspended solids after the ozone oxidation treatment.

The liquid corrosion tank includes an air inlet and an air outlet, and the temperature control device is installed at an upper portion of the liquid corrosion tank, and has a cooling tank having an intake port and an exhaust port spaced apart from each other, and is connected to an intake port of the cooling tank. An air supply fan for supplying an exhaust fan, an exhaust fan connected to an air discharge unit formed at an upper end of the liquid corrosion tank, and exhausting air that has undergone heat exchange, and located at an upper end of the cooling tank to draw up the wastewater in the liquid corrosion tank to cool the tank Wastewater injection unit for injecting, and a wastewater outflow portion protruded in the cross section of a plurality of hats in the lower portion of the cooling tank, heat injection can be made by contacting the injected wastewater and the supplied air in the cooling tank. have.

The exhaust port of the cooling tank may be configured to be discharged into the space adjacent to the air discharge portion in the liquid corrosion tank to discharge the air after the heat exchange.

The wastewater injection unit and the lower portion of the liquid corrosion tank is stored and the waste water is connected between the pump and the liquid circulating pump is installed to extract the wastewater to supply to the wastewater injection unit may further include a wastewater supply pipe.

Shatterproof device connected to the rear end of the exhaust fan and configured to prevent the scattering of liquid and diffusion of odors by introducing the high-temperature humid air stagnated in the upper layer in the liquid corrosion tank and the heat exchanged air discharged from the cooling tank It may further include.

The scattering prevention device, the first stage treatment unit including a multi-layered diaphragm to reduce the linear velocity of the liquid and odor contained in the introduced air, and remove the water of the first particle size, and water of fine particles at the top It may include a second stage treatment unit by spraying to grow and remove the water of the second particle size smaller than the first particle size, to remove the water-soluble odor.

The MLSS control device is provided with an MLSS measuring device installed in the liquid corrosion tank to measure the concentration of the MLSS in the liquid corrosion tank, a concentrated sludge pipe connected to the liquid corrosion tank in the front and the dehydrator in the rear, and a desorption pipe, respectively. And a concentrator for extracting the liquid corrosive liquid and concentrating it mechanically to separate the concentrated sludge and the desorption liquid, and signally connected to the MLSS measuring instrument and the concentrator, and transmitting the measured MLSS concentration value to the concentrator. It may include an integrated control panel for controlling the opening and closing of the pipe and the stripping liquid pipe.

The concentrated sludge pipe and the desorption fluid pipe are each provided with an electric valve, and each electric valve is connected to the integrated control panel in a signal, opening and closing may be controlled according to the measured MLSS concentration value.

The liquid corrosion tank may include a denitrification tank and a nitrification tank separated from each other, the concentrated sludge pipe may be connected to the nitrification tank, and the desorption pipe may be connected to the denitrification tank.

The solid-liquid separator is a chemical coagulation sedimentation filtration device, a coagulation reaction tank for agglomerating solids from wastewater introduced by administering a coagulant, and a needle connected to a rear end of the coagulation reaction tank to receive the coagulated solids and treated water and to remove sedimentary solids. All, and may be provided at the top of the settling basin may include a filter for removing the suspended solids.

The filtration unit may include a filtration unit frame forming a plurality of divided cells, and a filtration cell provided in each of the plurality of cells and including a filter cloth or a membrane of fibrous material.

It may include a washing water nozzle installed in the upper portion of the filtration cell and spraying the washing water into the filtration cell, and a washing water receiver installed in the lower portion of the filtration cell to receive the washing water passing through the filtration cell and discharge it to the outside.

According to the method and processing system for the high concentration organic sewage treatment by the continuous batch liquid corrosion method according to the present embodiment, by installing a multi-purpose temperature control device to overcome the disadvantages of the waste water cooling system that cools only the existing liquid temperature, It can play a complex role of removing and suppressing, preventing odors and liquids from scattering, and releasing the stagnant heat at the upper part of the aerobic liquid corrosion tank. Can be.

In addition, the inorganic coagulant, which was a disadvantage of the conventional liquid corrosion method, takes a large amount, and the equipment and structure are enlarged after the dehydration process due to the use of the filter cloth washing water due to the use of a high pressure belt press type dehydrator. By removing (Suspended Solid, SS) and transferring to the subsequent process, the amount of inorganic coagulant by SS can be reduced.

In addition, by using inorganic coagulant after dehydration, it can save more than 60% of the over-injected inorganic coagulant usage due to high concentration of sludge.In case of using centrifugal dehydrator, filter cloth washing water is not used because it does not use follicle washing water unlike belt press dehydrator. Significant reduction in the amount of use has the advantage of preventing excessive pumps, subsequent process equipment and structures.

Meanwhile, by applying a pressure flotation device or a chemical flocculation sedimentation filtration device to the solid-liquid separation process, the treated water from which the SS is first removed from the dehydrator is transferred to the pressure flotation device or the chemical flocculation sedimentation filtration device and continuously solid-liquid separation is performed. While maintaining the water quality, the amount of chemicals such as inorganic coagulants is reduced, and civil engineering structures are reduced, which reduces the initial investment cost.

Furthermore, if the MLSS concentration of the liquid corrosion tank is out of the proper concentration by providing the MLSS control device, a separate means for maintaining the MLSS is not provided. Therefore, the treatment efficiency is reduced, and the liquid corrosion is caused by the decrease of the MLSS concentration. This can solve problems such as excessive volume of the tank, or conversely, an increase in the airflow due to an excessively high MLSS concentration.

1 is a flow chart (process diagram) schematically showing a high concentration organic sewage treatment system according to an embodiment of the present invention.
Figure 2 is a schematic diagram showing a temperature control apparatus applied to the liquid corrosion tank of the high concentration organic sewage treatment system according to an embodiment of the present invention.
Figure 3 is a schematic diagram showing a scattering prevention device in the temperature control device applied to the liquid corrosion tank of the high concentration organic sewage treatment system according to an embodiment of the present invention.
FIG. 4 is a flow chart illustrating an MLSS control apparatus in a liquid corrosion tank of a high concentration organic sewage treatment system according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating a method for controlling MLSS in a liquid corrosion tank of a high concentration organic sewage treatment system according to an embodiment of the present invention.
FIG. 6 is a partially cutaway perspective view of the chemical coagulation sedimentation filtration apparatus of the high concentration organic sewage treatment system according to an embodiment of the present invention.
FIG. 7 is a plan view illustrating in detail the filter frame and the membrane of FIG. 6.
8 is a schematic view showing a chemical coagulation sedimentation filtration apparatus of a high concentration organic sewage treatment system according to an embodiment of the present invention.
9 is a flow chart schematically showing a high concentration organic sewage treatment system according to another embodiment of the present invention.
10 is a flow diagram illustrating a conventional wastewater treatment method.

Hereinafter, with reference to the accompanying drawings will be described in detail to be easily carried out by those of ordinary skill in the art. In the drawings, parts irrelevant to the description are omitted to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

In addition, throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless specifically stated otherwise.

1 is a flow chart (process diagram) schematically showing a high concentration organic sewage treatment system according to an embodiment of the present invention.

The high concentration organic sewage treatment system according to the present embodiment includes 1) a pretreatment unit, 2) a liquid corrosion tank treatment unit, 3) a solid-liquid separation unit, and 4) an ozone and filtration unit. The specific structure and operation process of each part are demonstrated in detail below.

1) Pretreatment of high concentration organic sewage

The pretreatment unit may pretreat a high concentration of organic sewage, and may include a crude sewage separator for removing coarse contaminants contained in organic sewage, and a fine contaminant separator connected to a rear end thereof to remove fine contaminants contained in organic sewage. The first storage tank may be positioned between the crude wood confinement separator and the fine contaminant separator. Examples of high concentration organic sewage include livestock manure, manure and food wastewater.

First, the collected high concentration organic sewage is screened and removed into the first storage tank through the crude coarse sediment separator. High concentration organic sewage from which coarse coarse matter has been removed is introduced into the fine contaminant separator by means of a pump installed in the first storage tank. The fine contaminants contained in the high concentration organic sewage can be removed in a fine contaminant separator, and the high concentration organic sewage from which the fine contaminants have been removed is introduced into the liquid corrosion tank.

High concentration organic sewage with suspended solids (Suspended Solid, SS) of 20,000 mg / ℓ or more is added with flocculant when separating fine contaminants so that mixed liquor suspended solids (hereinafter referred to as "MLSS") can reach 10,000 mg / ℓ. can do.

2) Treatment of Liquid Corrosion Tank

The liquid corrosion tank treatment unit may include an oxygen-free liquid corrosion tank (anoxic tank, denitrification tank) and an aerobic liquid corrosion tank (aerobic tank, nitrification tank) as a liquid corrosion tank connected to the rear end of the fine contaminant separator. SS of the high concentration organic sewage from which the fine contaminants have been removed may be in the range of 7,000 to 15,000 mg / L. The liquid corrosion tank treatment unit may remove the organic matter and nitrogen while internally circulating the anoxic liquid corrosion solution into which the high concentration organic sewage is introduced using a pump between the oxygen-free liquid corrosion tank and the aerobic liquid corrosion tank. The rear end of the aerobic liquid corrosion tank is connected to the MLSS control device, it is possible to use the pump to flow out the liquid corrosion solution completed in the aerobic liquid corrosion tank to the MLSS control device. At this time, the volume ratio of the oxygen-free liquid corrosion tank and the aerobic liquid corrosion tank is composed of 1: 2 ~ 4, the BOD / MLSS load of the aerobic liquid corrosion tank can be adjusted to 0.05 ~ 0.1kg / MLSS · d, TN of the liquid corrosion tank / MLSS load is 0.02 ~ 0.05kg / MLSS · d or less, SDNR is adjusted to 2.0 ~ 4.0g-NOX-N / kg.MLVSS.hr, SNR is 1.0 ~ 2.0g-NH4-N / kg.MLVSS.hr Can be.

In other words, while the organic oxygen-free liquid corrosion solution into which the organic sewage is injected is internally circulated between the oxygen-free liquid corrosion tank and the aerobic liquid corrosion tank, the organic waste water introduced from the oxygen-free liquid corrosion tank is used as a carbon source, and the NOx- of the circulating fluid circulated from the aerobic liquid corrosion tank. N (nitric acid nitrogen or nitrous nitrogen) is denitrated, and in the aerobic liquid corrosion tank, NH ₄ -N (ammonia nitrogen) is removed from the oxygen free liquid corrosion tank to remove NH ₄ -N (ammonia nitrogen). Nitric acid or nitrous acid). The operation method of the liquid corrosion process can be controlled so that the entire process from input to withdrawal can be automatically operated by installing an automatic control panel for operating the liquid corrosion tank. This ensures the certainty and convenience of operation of the liquid corrosion vessel.

An example of more detailed operating conditions is as follows.

The pretreated new organic wastewater was continuously injected into an oxygen-free liquid corrosion tank for 20 hours a day to denitrify N0x-N (nitrogen nitrogen or nitrite nitrogen) using BOD (Biochemical Oxygen Demand) in organic wastewater, and the efficiency of denitrification reaction. Stir with an underwater mixer to improve the Subsequently, it is circulated through an aerobic liquid corrosion tank to oxidize residual BOD and oxidize ammonia nitrogen and to supply the air supply amount of 2.5 m 2 -Air / m 2 .hr for the activity of microorganisms. The circulation amount is about 1.5 times the total amount of the anaerobic liquid corrosion bath and the aerobic liquid corrosion bath, and the aerobic liquid corrosion is completed after the liquid corrosion is completed while the aerobic liquid corrosion bath and the aerobic liquid corrosion bath are stopped for 4 hours a day. Withdrawal of the throughput per day from the bath flows into the MLSS regulator.

The water quality of the organic wastewater treated in the liquid corrosion tank as described above is as follows.

PH 8.3 or less, NH ₃ -N (ammonia nitrogen) 5 mg / l or less, NOx-N (nitric acid or nitrite nitrogen) 20 mg / l or less

On the other hand, the liquid corrosion tank is equipped with a multi-purpose temperature control device can reduce the liquid temperature of the liquid corrosion liquid rises due to the exothermic reaction in the process of removing organic matter and nitrogen in the aerobic liquid corrosion tank. The temperature control device includes a cooling tank installed in the upper portion of the liquid corrosion tank, the intake port of the cooling tank is connected to the air supply fan to supply air and the exhaust fan formed on the top of the liquid corrosion tank connected to the exhaust fan It is possible to exhaust the air after the heat exchange.

In addition, the waste water injection unit is located at the upper end of the cooling tank to extract the waste water in the liquid corrosion vessel can be injected into the cooling tank. At the bottom of the cooling tank may be formed a discharged portion raised in a plurality of triangular cross-sections. As a result, in the cooling tank, the injected waste water and the supplied air may contact each other to perform heat exchange.

The temperature control device promotes stable treatment by maintaining the optimum growth temperature of the microorganisms, and at this time, it is structured to prevent the external scattering and odor of the liquid corrosive liquid, and to suppress and remove the foaming of the top of the tank, discharge of hot air, etc. Can play the role of.

Hereinafter, the temperature control device will be described in more detail with reference to FIGS. 2 and 3.

Figure 2 is a schematic diagram showing a temperature control device applied to the liquid corrosion tank of the high concentration organic sewage treatment system according to an embodiment of the present invention, Figure 3 is a high concentration organic sewage treatment system according to an embodiment of the present invention It is a schematic diagram showing a scattering prevention device in the temperature control device applied to the liquid corrosion bath of the.

The temperature control device 100 according to the present embodiment may be applied to the liquid corrosion tank 120 in the wastewater treatment facility. Liquid corrosion tank 120 is a facility for treating wastewater using microorganisms, etc., an aerobic tank (nitrogenation tank) for supplying oxygen through the acid pipe 125 to convert ammonia nitrogen to nitric acid through organic matter removal and nitrification. ) And an anoxic tank (denitrification tank) for removing nitrate nitrogen returned from the aerobic tank 121 using organic matter of the influent wastewater in the absence of oxygen. The temperature control device 100 may be selectively installed in the aerobic tank 121 in the liquid corrosion tank 120.

Referring to FIG. 2, a cooling tank 130 may be installed at an upper layer of the liquid corrosion tank 120. The cooling tank 130 includes an inlet port 131 and an exhaust port 132, and provides a space and a passage between the inlet port 131 and the exhaust port 132 to exchange heat with external air and waste water.

In the liquid corrosion tank 120, an air inlet 127 and an air outlet 128 are respectively formed adjacent to the inlet port 131 and the exhaust port 132 of the cooling tank 130, and the air supply fan 141 is provided. May be connected to the air inlet 127 and the exhaust fan 142 may be connected to the air outlet 128. The air supply fan 141 is installed adjacent to the inlet port 131 of the cooling tank 130, respectively, and the inlet port 131 and the exhaust port 132 may be spaced apart from each other at the upper end of the liquid corrosion tank 120. At this time, the exhaust fan 142 is designed to have a larger capacity than the air supply fan 141 and is supplied by the air supply fan 141 to complete the heat exchange in the cooling tank 130 as well as in the liquid corrosion tank 120. The hot and humid air stagnant in the upper layer can also be discharged to the outside. To this end, the exhaust port 132 of the cooling tank 130 may be configured to be opened into a space adjacent to the air discharge portion 128 in the liquid corrosion tank 120.

The waste water injection unit 150 is installed at the upper end of the cooling tank 130 to draw up the waste water in the liquid corrosion tank 120 to be sprayed into the cooling tank 130. The wastewater injection unit 150 and the lower portion of the liquid corrosion tank 120 are connected to the wastewater supply pipe 156 and a liquid circulation pump 157 is installed to draw up the wastewater stored in the lower portion of the liquid corrosion tank 120. 150). The conical dispersion induction member 153 is provided below the wastewater injection unit 150 to induce the diffusion of the supplied wastewater.

The bottom of the cooling tank 130 may be formed with a waste water outlet 154 raised in a plurality of hat cross-section. The wastewater sprayed from the wastewater sprayer 150 may be contacted with external air supplied through the inlet 131 to complete heat exchange, and then flow back into the liquid corrosion tank 120 through the wastewater outlet 154. .

Meanwhile, the scattering prevention device 170 may be connected to the rear end of the exhaust fan 142. The scattering prevention device 170 may be configured to introduce air discharged from the cooling tank 130 to prevent scattering of liquids and diffusion of odors.

Referring to FIG. 3, the scattering prevention device 170 may sequentially process the first stage treatment part along a direction from the inlet 171 toward the outlet 172 in the main body 174 in which the inlet 171 and the outlet 172 are formed. (I), the second stage processor (II), and the third stage processor (III). The first stage processing unit I may directly connect with the inlet 171 to introduce air that has undergone heat exchange transmitted by the exhaust fan 142. The first stage processing unit I may include a multi-layered diaphragm 176 to reduce the linear velocity of the liquid and odor contained in the air introduced through the inlet 171 and to remove the water having the first particle size. The removed water is configured to be periodically discharged to the outside through the drain pipe. The second stage treatment unit II may spray the fine particles of water from the top to grow and remove moisture of the second particle size and to remove the water-soluble odor. The second particle size then has a diameter smaller than the first particle size.

The first stage treatment unit I and the second stage treatment unit II communicate with each other over the main body 174 of the scattering prevention device 170, and the water of the small particles that are not filtered out of the first stage treatment unit I is water-soluble odor. (Eg, with ammonia nitrogen (NH ₄ -N)) may be introduced into the second stage treatment unit (II). In the upper portion of the second stage treatment unit II, a flushing pipe 184 having an injection nozzle may be installed, and a diaphragm 178 may be installed in a lower portion thereof. The inclined surface 179 may be formed at the lower end of the second stage treatment unit II to design the falling water to flow, and the collected water may be supplied back to the washing pipe 184 by the washing pump 182. . That is, the water injected into the second stage treatment unit (II) through the water washing pipe 184 may reuse the effluent from the wastewater treatment plant, or may use time constant or ground water.

The main body 174 of the scattering prevention device 170 may be provided with a third stage processing unit III as a buffer space after the second stage processing unit II. The third stage treatment unit III and the second stage treatment unit II communicate with each other at a lower portion of the main body 174, and a diaphragm 178 is formed at a lower portion of the third stage treatment unit III, and the upper portion thereof has an outlet 172. Air treated in connection with the can be discharged through it. In addition, the third stage treatment unit (III) may be configured to spray by removing the chemicals necessary to remove the acidic odor and alkaline odor as necessary. Therefore, the chemical pipe 187 having the spray nozzle is installed on the third stage treatment unit III, and the chemical pipe 187 may be connected to the chemical pump 185.

Meanwhile, referring back to FIG. 1, the wastewater treatment system according to the present embodiment may further include an MLSS controller. The MLSS control device is located at the rear end of the liquid corrosion tank to separate the liquid corrosion solution transported from the liquid corrosion tank of the liquid corrosion tank into concentrated sludge and desorption liquid, and return the concentrated sludge or desorption liquid according to the MLSS concentration in the liquid corrosion tank It is possible to control the concentration of MLSS in the liquid corrosion tank.

The MLSS regulator may include an MLSS meter, a concentrator, and an integrated control panel that is connected in signal with them. The MLSS measuring device may be installed in the liquid corrosion tank to measure the concentration of MLSS in the liquid corrosion tank. The concentrator is connected to the rear end of the liquid corrosion tank, and the liquid corrosion solution transferred from the liquid corrosion tank may be concentrated to separate the concentrated sludge and the desorption liquid.

The MLSS controller may measure the concentration of MLSS in the liquid corrosion tank by the MLSS measuring instrument and return the concentrated sludge to the liquid corrosion tank when the concentration is lower than a preset reference concentration, and return the desorption liquid to the liquid corrosion tank when the concentration is higher than the reference concentration. have. To this end, the MLSS control unit includes a concentrated sludge pipe and a desorption pipe, which can be connected to the liquid corrosion tank in the front and the dehydrator to the rear. An integrated control panel is connected to the MLSS measuring instrument and the concentrator to perform the above control, and receives the measured MLSS concentration value and transfers it to the concentrator to control the opening and closing of the concentrated sludge pipe and the desorption pipe. can do.

A dehydrator is connected to the rear end of the MLSS controller to dehydrate the organic flocculant by adding the concentrated sludge. That is, the sludge can be removed by dehydrating the liquid corrosive liquid, which has been purged, from the aerobic liquid corrosive tank to the mixing tank as a daily throughput while dehydrating only the organic coagulant (Polymer) into the dehydrator.

Hereinafter, the MLSS adjusting apparatus will be described in more detail with reference to FIGS. 4 and 5.

FIG. 4 is a flow chart illustrating a MLSS control apparatus in a liquid corrosion tank of a high concentration organic sewage treatment system according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating a method of controlling MLSS in a liquid corrosion tank.

Referring to FIG. 4, the MLSS control apparatus in the liquid corrosion tank according to the present embodiment includes an MLSS measuring instrument for measuring the MLSS concentration in the liquid corrosion tank and a concentrator for extracting the liquid corrosion solution and concentrating it mechanically to separate the concentrated sludge and the desorption solution. do. The MLSS meter is installed in the liquid corrosion tank, the concentrator is provided with a concentrated sludge pipe and a desorption pipe, respectively, the concentrated sludge pipe and the desorption pipe may be connected to the liquid corrosion tank, respectively.

The MLSS measuring instrument and the concentrator are signally connected to the integrated control panel, and the integrated control panel receives the MLSS concentration value in the liquid corrosion vessel measured from the MLSS measuring instrument and transfers the result to the concentrator to control the conveyance or transfer of the concentrated sludge and the desorption liquid. . That is, the integrated control panel may control the conveyance or transfer of the concentrated sludge and the desorption liquid by controlling the opening and closing of the concentrated sludge pipe and the desorption pipe connected between the concentrator and the liquid corrosion tank. To this end, the concentrated sludge pipe and the desorption pipe are each provided with an electric valve and each electric valve is connected to the integrated control panel signal, the opening and closing can be controlled according to the measured MLSS concentration value.

More specifically, when the concentration is lower than the set MLSS reference concentration in the liquid corrosion tank, the concentrated sludge is returned to the liquid corrosion tank, and when higher than the MLSS reference concentration in the liquid corrosion tank, the desorption liquid may be returned to the liquid corrosion tank. The liquid corrosion tank includes a denitrification tank (oxygen-free liquid corrosion tank) and a nitrification tank (aerobic liquid corrosion tank) separated from each other, wherein the concentrated sludge pipe may be connected to the nitrification tank, and the desorption pipe may be connected to the denitrification tank. Therefore, the concentrated sludge may be returned to the nitrification tank, and the desorption liquid may be returned to the denitrification tank.

The mixing tank may be located between the liquid corrosion tank and the concentrator. That is, the mixing tank is connected to the rear end of the nitrification tank of the liquid corrosion tank and connected to the front end of the concentrator to store the liquid corrosion solution and then transfer it to the concentrator as a daily throughput.

A dehydrator may be connected to a rear end of the thickening sludge pipe drawn out from the thickener. And the rear end of the dehydrator may be connected to the filtered water tank. In addition, the filtered water tank may be connected to the rear end of the desorption solution pipe drawn out from the concentrator. Therefore, the concentrated sludge may be transferred to the dehydrator through the concentrated sludge pipe during the normal or when the MLSS concentration value in the liquid corrosion tank is higher than the reference concentration. In addition, the desorption liquid separated from the concentrator as usual may be transferred to the filtrate tank through the desorption pipe. In this case, 'normal' means that the value of the MLSS concentration in the liquid corrosion tank is within the range of the preset reference value. For example, the concentration of the MLSS in the liquid corrosion tank in the usual time to fall within the range of 7,000 ~ 15,000mg / ℓ, if less than 7,000mg / ℓ can be set to a low concentration, if it exceeds 15,000mg / ℓ high concentration.

Referring to FIG. 5, the method of controlling the MLSS concentration in the liquid corrosion tank according to the present embodiment may be performed by driving the MLSS adjusting apparatus according to the processing system diagram shown in FIG. 4, and includes the following steps.

First, the liquid corrosion solution is taken out by the daily throughput, and mechanically concentrated in a concentrator to separate the concentrated sludge and the desorption solution (S110).

The mixing tank stores the liquid corrosion solution transferred from the nitrification tank of the liquid corrosion tank and transfers it to the concentrator by the set throughput.

The MLSS concentration is measured using a MLSS measuring instrument (S120).

The MLSS measuring instrument and the concentrator are signally connected to the integrated control panel, and the integrated control panel can control the return or transfer of the concentrated sludge and the leachate by receiving the MLSS concentration value measured in the liquid corrosion vessel from the MLSS measuring instrument to the concentrator. At this time, the integrated control panel may calculate the required amount of the concentrated sludge or the desorption liquid to be returned to the liquid corrosion vessel according to the MLSS concentration measured by the MLSS measuring instrument.

When the measured MLSS concentration is lower than the predetermined reference concentration value, the concentrated sludge is returned from the concentrator to the liquid corrosion tank (S130).

The integrated control panel receives the MLSS concentration value measured by the MLSS meter and compares it with the preset reference concentration value, and if it is lower, determines that it is 'low concentration' and can open the electric valve of the thickener sludge pipe of the thickener. At this time, the electric valve of the desorption liquid pipe connected to the liquid corrosion tank can be closed. Therefore, the concentrated sludge pipe may be connected to the nitrification tank of the liquid corrosion tank to convey the concentrated sludge to the nitrification tank. This may increase the MLSS concentration of the liquid corrosion vessel.

And the remaining concentrated sludge of the concentrator can be transferred to the dehydrator, and the desorption pipe connected to the filtrate tank is normally opened to transfer the desorption liquid to the filtrate tank. In other words, the desorption liquid separated from the thickener is usually transferred to the filtered water tank without passing through the dehydrator, so that the amount of dehydration is reduced, so that the capacity of the dehydrator can be reduced.

When the measured MLSS concentration is higher than the predetermined reference concentration value, the desorption liquid is returned from the concentrator to the liquid corrosion tank (S140).

The integrated control panel receives the MLSS concentration value measured by the MLSS meter and compares it with the preset reference concentration value, and if it is higher, determines that it is 'high concentration' and can open the electric valve of the desorber piping of the concentrator. At this time, the electric valve of the concentrated sludge pipe connected to the liquid corrosion tank can be closed. Therefore, the desorption pipe may be connected to the denitrification tank of the liquid corrosion tank to return the desorption solution to the denitrification tank. This can reduce the MLSS concentration of the liquid corrosion bath.

In addition, the concentrated sludge pipe connected to the dehydrator may be opened to transfer the concentrated sludge of the concentrator to the dehydrator. The concentrated sludge pipe is also open in normal times to transfer the concentrated sludge to the dehydrator.

In the dehydrator, the concentrated sludge received is dewatered and discharged, and the desorbent is transferred to the filtered water tank.

On the other hand, the step of returning the concentrated sludge to the liquid corrosion tank and the step of returning the desorption liquid to the liquid corrosion tank until the MLSS concentration measured in the MLSS measuring instrument reaches a reference concentration value.

3) solid-liquid separation

Referring back to FIG. 1, a solid-liquid separator is connected to the rear end of the dehydrator, and the organic flocculant and the inorganic flocculant are added to the desorbed degreaser and the condensate through the condenser, followed by flocculation by secondary flocculation and flotation or sedimentation. Can be transferred to the neutralization tank.

In the wastewater treatment system according to the present embodiment, the solid-liquid separator may be provided with a chemical flocculation sedimentation filtration device.

The chemical flocculation precipitation filtration apparatus may include a flocculation reactor for agglomerating solids, a precipitation part connected to a rear end thereof to remove precipitated solids, and a filtration part for removing suspended solids. In the flocculation tank, a flocculant is administered to the inflowed wastewater to agglomerate solids therefrom, and in the precipitation part, the flocculated solids and the treated water are delivered to remove the precipitated solids. A filtration unit may be provided at an upper portion of the precipitation unit to remove floating solids.

Hereinafter, the chemical coagulation sedimentation filtration apparatus will be described in more detail with reference to FIGS. 6 to 8.

FIG. 6 is a partial cutaway perspective view partially showing a chemical coagulation sedimentation filtration apparatus of a high concentration organic sewage treatment system according to an embodiment of the present invention, and FIG. 7 is a detailed view of the filtration unit frame and the filtration membrane of FIG. 6. 8 is a plan view schematically illustrating a chemical coagulation sedimentation filtration device of a high concentration organic sewage treatment system according to an embodiment of the present invention.

Referring to FIG. 6, the chemical coagulation sedimentation filtration apparatus 300 according to the present embodiment includes a coagulation reaction tank 320 for agglomerating solids, a precipitation part 340 connected to a rear end thereof and removing sedimentable solids, and an upper portion thereof. It comprises a filter 350 for removing the suspended solids. The flocculation reactor 320 may aggregate the solid by administering a flocculant to the introduced wastewater. The precipitation unit 340 receives the agglomerated solids and the treated water from the agglomeration reaction tank 320, and may perform a function of removing the precipitated solids therefrom. The aggregated solids may include floating solids, and the floating solids may be filtered out of the filter unit 350.

The precipitation unit 340 includes a precipitation tank 341 and a rectifying plate 347 having a cylindrical shape therein, and the solids and the treated water transferred from the coagulation reaction tank 320 are surrounded by the rectifying plate 347. Can be accommodated. The rectifying plate 347 is located at the center of the settling tank 341 and extends by a depth set from the top to the bottom.

Referring to FIG. 7, the filtration unit 350 includes a filtration unit frame 352 forming a plurality of divided cells and a filtration cell 354 provided in each of the plurality of cells. The filter frame 352 may include a circular rim 352a and a plurality of spokes 352b extending radially from the center of the circle to the circular rim 352a. Therefore, the filtration cell 354 is partitioned by each cell by the circular rim 352a and the spoke 352b, and each cell may include a filtration membrane or a filtration membrane made of fibrous material. In addition, the rectifying plate 347 is formed at the center of the filtering unit 350 so that the spokes 352b may be formed integrally therewith to extend radially. The rotation driving shaft 357 may be coupled to the center of the rectifying plate 347. Can be. At this time, the rectifying plate 347 may extend in parallel with the rotation drive shaft 357 in a direction perpendicular to the surface of the filtration cell 354. The filtration unit 350 configured as described above may be installed parallel to the water surface of the treated water stored in the precipitation tank 341.

Referring to FIG. 8, the washing water nozzle 361 is installed at the upper portion of the filtration unit 350, and the washing water may be sprayed downward toward the filtration cell 354 of the filtration unit 350. The lower part of the filtration cell 354 is provided with a wash water receiver 363, and may be configured to receive the washing water passing through the filtration cell 354 and to discharge it to the outside. The wash water receiver 363 is installed 50 mm to 100 mm below the filtered water surface of the treated water stored in the precipitation tank 341, whereby the wash water and the scum of the upper part can be removed at the same time. That is, the sprayed washing water may remove foreign substances attached to the filtration cell 354, and the foreign substances thus removed may be discharged to the outside together with the washing water passing through the filtration cell 354.

The discharging end of the washing water receiver 363 is connected to the washing water discharge pipe 365, and the washing water discharge pipe 365 has a pipe structure extending outward. In addition, an electric valve 367 may be installed at a portion of the washing water discharge pipe 365 located outside to control the opening and closing. Therefore, the electric valve 367 may open the washing water discharge pipe 365 only at the time of washing.

Meanwhile, a pressure sensor 345 is installed inside the precipitation tank 341, and a control panel 371 for controlling the driving of the washing water nozzle 361 may be installed at one upper end of the precipitation tank 341. The pressure sensor 345 may be electrically connected to the control panel 371 so as to drive the washing water nozzle 361 when the pressure set by the pressure sensor 345 is reached. The control panel 371 may include a timer (not shown) separately from the pressure sensor 345 and may be set to drive the washing water nozzle 361 for a set time after a set time has elapsed even if the set pressure is not reached.

A sludge collector 342 is provided at the lower end of the settling tank 341 to collect and discharge the sludge, which is a settled solid that sank to the bottom. The rotation drive shaft 357 is positioned and coupled to the center of the filter frame 352 having a circular edge of the filter 350, and the rotation drive shaft 357 may be connected to the center of the sludge collector 342. The rotation drive shaft 357 is connected to the drive motor M on one side of the upper end, and the drive motor M may transmit the rotation drive force to the rotation drive shaft 357 to rotate it. The rotary drive shaft 357 may be configured to drive simultaneously with the sludge collector 342. The filtration unit 350 having the filtration cell 354 does not rotate during filtration but may be driven to rotate only during washing. Therefore, the sludge collector 342 is also driven to rotate at the same time when the filter cell 354 is washed. The sludge collected in the sludge collector 342 may be drawn by the sludge discharge pump 349 provided outside the sedimentation unit 341 and discharged to the outside.

The precipitation tank 341 may include a treated water outlet 343 for discharging the treated water, and a collecting tank 373 may be provided at a rear end of the treated water outlet 343. The collection tank 373 may store and discharge the treated water, and may be connected to the washing water nozzle 361 to supply the washing water. Therefore, the collecting tank 373 may be connected to the washing water nozzle 361 via the washing water pump 362.

In addition, a scraper (not shown) may be attached to the lower portion of the filtration unit 350, and may collect and float floating materials present in the upper portion of the settling tank 341 while rotating during washing to transfer the washing water receiver 363.

Chemical coagulation sedimentation filtration apparatus 300 according to the present embodiment may be composed of a plurality in preparation for backwashing.

As described above, the removal rate of the organic sewage treated with the solid-liquid separation is as follows.

SS removal rate over 99%, COD removal rate over 85%, T-P removal rate over 99%

4) ozone and filtration treatment

Referring back to FIG. 1, an ozone processor is connected to the rear end of the solid-liquid separator so that the treated water can be ozonated using an ozone contact facility. The ozone treatment facility uses ozone, a strong oxidant, for the purpose of removing hardly degradable COD and disinfecting sterilized water from the solid-liquid separation process. At this time, the ozone contact equipment can be treated using the apparatus disclosed in Korean Patent No. 1212787. And through the ozone treatment, dissolved pollutants are oxidized to increase suspended solids. In order to remove them continuously, a filter can be used to remove suspended solids to produce effluent. As the filter, for example, an activated carbon filtration device, a filtration device, a Pore Controllable Fiber (PCF) filter, an upflow filtration device, and the like may be used.

The amount of ozone supplied for the oxidation of COD is 2-3 mg-O ₃ / mg-COD, treated with a filtration device to remove secondary precipitates after ozone oxidation, and the final treated water may be dehydrator washing water.

9 is a flow chart schematically showing a high concentration organic sewage treatment system according to another embodiment of the present invention.

The high concentration organic sewage treatment system according to the present embodiment has a different configuration of the solid-liquid separation device than the organic sewage treatment system shown in FIG. In this embodiment, the solid-liquid separator may be installed as a virtual negative pressure device. Pressurized flotation device is a facility that pressurizes the air to dissolve in water and flows into the tank to generate micro-bubbles. Other configurations can be applied in the same manner as the system of FIG.

Comparing the high concentration organic sewage treatment system (see FIGS. 1 and 9) according to the present exemplary embodiments described above with the conventional organic sewage treatment system (see FIG. 10) is as follows.

division  Comparative Example (Fig. 10) Example (FIG. 1 or 9) Sludge removal Belt press dehydrator applied Centrifugal dehydrator + chemical flocculation sedimentation filtration device / pressurized flotation device (ie improved solid-liquid separation method) Belt wash water Busy Low usage Drug usage plenty Less Reactor temperature control method Separate waste water cooling system required No need to install separate waste water cooling system Construction cost Excessive structure due to large amount of filter cloth wash water Less use of wash water to prevent overloading of the structure

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

100: multi-purpose thermostat 120: liquid corrosion tank
121: aerobic generation 125: diffuser
127: air inlet 128: air outlet
130: cooling tank 131: intake port
132: exhaust port 141: air supply fan
142: exhaust fan 150: wastewater injection unit
153: conical dispersion induction member 154: wastewater outlet
156: wastewater supply pipe 157: liquid circulation pump
170: shatterproof device 171: inlet
172: outlet 174: scattering prevention device body
176, 178: plate 179: slope
182: flushing pump 184: flushing piping
185: chemical pump 187: chemical piping
300: chemical flocculation precipitation filter 320: flocculation reactor
340: sedimentation unit 342: sludge collector
343: treated water outlet 345: pressure sensor
347: rectifying plate 349: sludge discharge pump
350: filter unit 352: filter unit frame
352a: round border 352b: spokes
354: filtration cell 357: rotary drive shaft
361: wash water nozzle 362: wash water pump
363: wash water receiver 365: wash water discharge pipe
367: electric valve 371: control panel
373: sump tank

Claims (16)

Removing impurities contained in organic wastewater;
Continuously injecting the organic sewage into an oxygen-free liquid corrosion tank;
The NOx-N of the circulating fluid circulated from the aerobic liquid corrosion tank circulated from the aerobic liquid corrosion tank using the organic effluent injected from the anoxic liquid corrosion tank as the carbon source while internally circulating the oxygen-free liquid corrosion solution into which the organic sewage was injected. (Nitric acid nitrogen or nitrous nitrogen) is denitrated, and in the aerobic liquid corrosion tank, NH ₄ -N (ammonia nitrogen) is replaced with NOx-N (nitrogen) by removing residual organic matter from the circulating fluid circulated from the oxygen-free liquid corrosion tank. Oxidation with acidic nitrogen or nitrous acid);
Concentrating the liquid corrosion solution treated in the liquid corrosion tank to separate the concentrated sludge and the detachment solution;
Measuring the concentration of MLSS (Mixed Liquor Suspended Solids) in the aerobic liquid corrosion tank and returning the concentrated sludge to the aerobic liquid corrosion tank when the concentration is lower than a predetermined reference concentration, and when the concentration is higher than the reference concentration, the desorption liquid is the oxygen-free Controlling the MLSS concentration by returning to the liquid corrosion vessel;
Dewatering by introducing an organic flocculant into the concentrated sludge;
Performing a solid-liquid separation process in which an inorganic coagulant and an organic coagulant are added to the desorption solution, flocculate, flocculate or settle the sludge, and transfer the treated water to a neutralization tank;
Ozone oxidation treatment of the treated water using ozone; And
Filtration and discharge of the suspended solids increased after the ozone oxidation treatment
High concentration organic sewage treatment method by a continuous batch liquid corrosion method comprising a. The method of claim 1,
Reducing the elevated liquid temperature of the liquid corrosion solution in the aerobic liquid corrosion tank;
Reducing the liquid temperature,
Supplying air to a cooling tank at an upper portion of the liquid corrosion tank;
Extracting the wastewater in the liquid corrosion tank and spraying the liquid into the cooling tank;
Heat exchanging the injected waste water and the supplied air in contact with each other in the cooling tank; And
Discharging the air after the heat exchange
A high concentration organic sewage treatment method by a continuous batch liquid corrosion method comprising a. The method of claim 1,
The step of controlling the MLSS concentration,
Extracting the liquid corrosion solution treated in the liquid corrosion vessel by a daily throughput and mechanically concentrating in a concentrator to separate the concentrated sludge and the desorption solution;
Measuring the concentration of MLSS in the liquid bath using an MLSS measuring instrument;
If the measured MLSS concentration is lower than the reference concentration, returning the concentrated sludge from the concentrator to the liquid corrosion tank and transferring the desorption liquid to the filtered water tank;
When the measured MLSS concentration is higher than the reference concentration, returning the desorption liquid from the concentrator to the liquid corrosion tank and transferring the concentrated sludge to a dehydrator connected to the rear end of the concentrator; And
Transferring the concentrated sludge to the dehydrator when the measured MLSS concentration is the reference concentration and transferring the desorption liquid to the filtrate tank
High concentration organic sewage treatment method by a continuous batch liquid corrosion method comprising a. The method of claim 3, wherein
The MLSS meter and the concentrator are signal connected to an integrated control panel,
The integrated control panel further comprises the step of calculating the required amount of the concentrated sludge or the desorption liquid to be returned to the liquid corrosion vessel according to the MLSS concentration measured by the MLSS measuring method of a high concentration organic sewage treatment by the continuous batch liquid corrosion method. The method of claim 1,
The solid-liquid separation process performing step,
The concentrated organic sewage treatment method according to the continuous batch liquid-phase corrosion method characterized in that the sludge is precipitated or floated by transferring the flocculation liquid to the flocculation apparatus. The method of claim 1,
The organic sewage from which the contaminants are removed is introduced into an anaerobic liquid corrosion tank, and the MLSS is maintained at 7,000 to 15,000 mg / l, and the volume ratio of the anoxic liquid corrosion tank and the aerobic liquid corrosion tank is 1: 2 to 4, and the aerobic liquid corrosion tank is used. The BOD / MLSS load is adjusted to 0.05 ~ 0.1kg / MLSS · d, the TN / MLSS load of the liquid corrosion tank is 0.02 ~ 0.05kg / MLSS · d or less, and the SDNR is 2.0 ~ 4.0g-NOX-N / kg.MLVSS .hr, SNR is 1.0 ~ 2.0g-NH4-N / kg.MLVSS.hr, high concentration organic sewage treatment method by a continuous batch liquid corrosion method. A contaminant separator for removing coarse and / or fine contaminants contained in organic sewage;
An oxygen-free liquid corrosion tank and an aerobic liquid corrosion tank connected to a rear end of the contaminant separator, wherein the organic oxygen-injected liquid containing the organic sewage is circulated between the oxygen-free liquid corrosion tank and the aerobic liquid corrosion tank, and the organic injected from the oxygen-free liquid corrosion tank Denitrification of NOx-N (nitrogenous nitrogen or nitrite nitrogen) of the circulating fluid circulated from the aerobic liquid corrosion tank using filthy water as a carbon source, and residual circulating fluid circulated from the anoxic liquid corrosion tank in the aerobic liquid corrosion tank A liquid corrosion tank for oxidizing NH ₄ -N (ammonia nitrogen) to NO x -N (nitrogen nitrogen or nitrous nitrogen) by removing organics;
A temperature control device installed in the liquid corrosion tank to reduce an elevated liquid temperature of the liquid corrosion solution in the aerobic liquid corrosion tank;
It is connected to the rear end of the liquid corrosion tank to concentrate the liquid corrosion solution conveyed from the liquid corrosion tank to separate the concentrated sludge and the desorption liquid, the concentration of the sludge in the aerobic liquid corrosion tank to measure the concentration of the concentrated sludge when lower than a predetermined reference concentration MLSS control apparatus for returning to the aerobic liquid corrosion tank and conveying the desorption liquid to the anoxic liquid corrosion tank when the concentration is higher than the reference concentration;
A dehydrator connected to a rear end of the MLSS controller for dehydrating by inputting an organic flocculant into the concentrated sludge;
A solid-liquid separator connected to the rear end of the dehydrator and agglomerated by adding an inorganic coagulant and an organic coagulant to the dewatered desorption solution, then flocculating or settling sludge and transferring the treated water to a neutralization tank;
An ozone processor connected to a rear end of the solid-liquid separator and performing ozonation treatment of the treated water using ozone; And
A filter connected to the rear end of the ozone treatment unit for filtration and discharge of suspended solids increased after the ozone oxidation treatment.
High concentration organic sewage treatment system by a continuous batch liquid corrosion method comprising a. The method of claim 7, wherein
The liquid corrosion tank includes an air inlet and an air outlet,
The temperature control device,
A cooling tank installed at an upper portion of the liquid corrosion tank and having an inlet and an exhaust port spaced apart from each other;
An air supply fan connected to an intake port of the cooling tank to supply air;
An exhaust fan connected to the air discharge unit formed at an upper end of the liquid corrosion tank to discharge the heat exchanged air;
A wastewater injection unit positioned at an upper end of the cooling tank to extract wastewater in the liquid corrosion tank and spray the wastewater into the cooling tank; And
Waste water outlet portion raised in a plurality of hat cross-section on the lower portion of the cooling tank
Including,
The high concentration organic sewage treatment system according to the continuous batch liquid corrosion method characterized in that the heat exchange is performed by contacting the injected waste water and the supplied air in the cooling tank. The method of claim 8,
The exhaust port of the cooling tank is configured to open the space in the liquid corrosion tank adjacent to the air discharge portion to discharge the air after the heat exchange, high concentration organic sewage treatment system by a continuous batch liquid corrosion method. The method of claim 8,
Shatterproof device connected to the rear end of the exhaust fan and configured to prevent the scattering of liquid and diffusion of odors by introducing the high-temperature humid air stagnated in the upper layer in the liquid corrosion tank and the heat exchanged air discharged from the cooling tank Further comprising, high concentration organic sewage treatment system by a continuous batch liquid corrosion method. The method of claim 10,
The scattering prevention device,
A first stage treatment part including a multi-layered diaphragm to reduce linear velocity of the liquid and odor contained in the introduced air and to remove moisture having a first particle size; And
The second stage treatment unit sprays fine particles of water from the top to grow and remove water having a second particle size smaller than the first particle size, and removes water-soluble odors.
High concentration organic sewage treatment system by a continuous batch liquid corrosion method comprising a. The method of claim 7, wherein
The MLSS adjusting device,
An MLSS meter installed in the liquid corrosion tank to measure the concentration of MLSS in the liquid corrosion tank;
A concentrator which is connected to the liquid corrosion tank in the front and is connected to the dehydrator in the rear, and a condensing liquid pipe, respectively, and a condenser for extracting the liquid corrosion solution and concentrating it mechanically to separate the concentrated sludge and the desorption solution; And
An integrated control panel connected to the MLSS measuring unit and the concentrator to receive the measured MLSS concentration value and transfer the measured MLSS concentration value to the concentrator to control the opening and closing of the concentrated sludge pipe and the desorption pipe.
Concentrated organic sewage treatment system by a continuous batch liquid corrosion method comprising a. The method of claim 12,
The concentrated sludge pipe and the desorption pipe are each provided with an electric valve and each electric valve is connected to the integrated control panel, the opening and closing is controlled in accordance with the measured MLSS concentration value, continuous batch liquid corrosion method High concentration organic sewage treatment system. The method of claim 7, wherein
The solid-liquid separator is a chemical flocculation precipitation filtration device,
An agglomeration reactor for agglomerating solids from the introduced wastewater by administering a coagulant;
A precipitation unit connected to a rear end of the aggregation reactor to receive the aggregated solids and the treated water and to remove the precipitated solids; And
Filtration unit provided at the upper portion of the settling portion to remove the suspended solids
High concentration organic sewage treatment system by a continuous batch liquid corrosion method comprising a. The method of claim 14,
The filtration unit,
A filter frame forming a plurality of divided cells; And
Filtration cell provided in each of the plurality of cells and including a filter cloth or a membrane of fibrous material
Concentrated organic sewage treatment system by a continuous batch liquid corrosion method comprising a. The method of claim 15,
A washing water nozzle installed on the filtration cell and spraying the washing water to the filtration cell; And
Washing water receiving installed in the lower part of the filtration cell and configured to discharge the washing water passing through the filtration cell to the outside
High concentration organic sewage treatment system by a continuous batch liquid corrosion method comprising a.

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