KR100869058B1 - Treatment pocess for the industrial wastewater loaded high nitrogen - Google Patents

Abstract

A method of treating industry wastewater containing a nitrogen having a high concentration is provided to reduce a nitrogen category ejected to a water-base and to cutting down a budget required to the advanced treatment improvement of waste water processing facilities by reducing the nitrogen amount flown into the waste water processing facilities by securing a processing capability of the discharging facilities. An NH4-N is separated from an effluent passing through the coagulation sedimentation pre-process in the zeolite adhesion bath(1). The effluent in which the ammonia is separated through a zeolite adsorption process of the zeolite adhesion bath is transferred an SBR(3) and an organic compound is removed. The remained NH4-N is discharged after the remained NH4-N is passed through a nitrification and a de-nitrogen process. An NH4-N-absorbed water which is attached and detached by transferring the effluent at the SBR and a nitrification tank(2) the same time is converted into NO3-N by nitrification microorganism. The effluent of which the nitrification is finished is transferred to a sulfation denitrification tank(4) in the nitrification tank, the S2- S0, and S2O32- of sulfide are oxidized to SO4- by the sulfation microorganism, returned to the zeolite adhesion bath, and circulated to feedwater necessary for regenerating zeolite.

Description

High concentration nitrogen containing industrial wastewater treatment method {TREATMENT POCESS FOR THE INDUSTRIAL WASTEWATER LOADED HIGH NITROGEN}

The high concentration of NH ₄ -N in the wastewater was separated by 50% through zeolite ion exchange to adjust the C / N ratio, and then discharged after treatment in SBR. After completion of nitrification in the nitrification tank, NH ₄ -N was separated. Denitrification in sulphation denitrification tank, NaHCO ₃ is used as a zeolite regeneration chemical to induce nitrification and alkalinity consumed in desulfurization denitrification, and nitrification microorganism cultured in nitrification tank is supplied to SBR to increase treatment efficiency. It relates to a treatment method composed of a principle to make.

Since the introduction of nitrogen regulation in Korea, the level of biological advanced processing technology in Korea has been rapidly improved, and DNR, NPR, KSBNR, KIDEA, HANT, and BCS have been developed and applied to the field. In addition, as the problem of nitrogen in landfill leachate and livestock wastewater is highlighted, the technology of high concentration nitrogen treatment is rather superior to foreign countries.

Nevertheless, the first reason why the process for industrial wastewater treatment containing high concentration of nitrogen is insufficient is that the domestic water treatment market has been led by the government and local governments. In other words, it is not surprising that the development of environmental technology in the field of public treatment facilities where the market was formed based on the budget secured, rather than the private industrial wastewater treatment facilities, where the market is unstable due to the financial crisis and low profitability of companies. . The second reason why the development of the treatment process was not smooth was that most of the high-density nitrogen-containing industrial wastewater had a low C / N ratio, which made it difficult to remove biological nitrogen. Because it was. Even in the case of leachate and livestock waste, which are difficult to treat biologically, the C / N ratio is sufficiently secured due to the nature of raw water, and in the case of sewage with low C / N ratio, the nitrogen concentration contained in the raw water is low, so that the effluent is not efficiently removed. There was no difficulty in achieving the water quality standards. Therefore, if you want to treat high concentration nitrogen containing industrial wastewater with low C / N ratio with the existing process, the site of use is limited and profit is important because of the enormous amount of reactor capacity for nitrification and the input of expensive external carbon source for denitrification. The reality is that it is difficult for industry to accept.

Due to this situation, as the nitrogen regulation of wastewater treatment facilities is strengthened, it is difficult to achieve emission standards in the direct treatment of wastewater and workplaces that need to reduce nitrogen emission load among individual companies in the area. There is an urgent need to develop a treatment process that can be a realistic alternative for a workplace. Accordingly, the present inventors aim to develop a treatment method that has a low C / N ratio and suppresses an increase in reactor capacity by targeting a medium-sized industrial wastewater containing a high concentration of ammonia nitrogen, and maintains maintenance costs such as power costs and chemical costs.

The present invention is to provide a high concentration ammonia nitrogen-containing medium-sized industrial wastewater treatment method while achieving the discharge standard of wastewater treatment facilities and economic feasibility, by separating 50% of NH ₄ -N from the industrial wastewater is introduced into the rear SBR Adjust the C / N ratio of the waste water to denitrification, induce NH ₄ -N denitrification through zeolite regeneration into the nitrification tank (MBR) to proceed nitrification with high efficiency, and remove NO ₃ -N from the nitrification tank. By desulfurization denitrification tank, denitrification using inexpensive sulfur instead of expensive external carbon source, surplus nitrification microorganisms generated in nitrification reactor is introduced into SBR to artificially increase nitrification microorganisms in SBR, and NaHO as a chemical necessary for regeneration of zeolite a high concentration by using a _{three-supplying} alkalinity consumed in the nitrification tank and the denitrification tank sulfated ammonium nitrogen-containing medium-sized And the provision of a wastewater treatment method up to the object of the invention.

In order to achieve the above object, the present invention is introduced into the zeolite adsorption tank having a two-series configuration of the wastewater undergoing the coagulation sedimentation pretreatment process, the separation of NH ₄ -N through the zeolite adsorption process, NH through the ammonia separation and zeolite regeneration process Adsorption / desorption step of ₄ -N desorption process,

Transferring the wastewater from which ammonia has been separated through the zeolite adsorption process of the zeolite adsorption tank to a continuous batch reaction tank for removal of organic matter, residual NH ₄ -N nitrification and self-denitrification, and then discharged;

A nitrification step of transferring the NH ₄ -N-containing water desorbed through the zeolite regeneration process of the continuous batch reaction tank to a nitrification tank and converting it into NO ₃ -N by a nitrification microorganism;

The conveyed oxidized back to the twos zeolite adsorbent zeolite ^play-that of a sulfur compound by nitrification is transferring the complete wastewater twos sulfated denitrification in the nitrification tank _{^{S 2 -, S0, S 2}} O 3 2 - the SO ₄ by sulfating microorganism The main technical composition is the method of treating high concentration nitrogen containing industrial wastewater, which is circulated to the required feed water.

The nitrification tank maintains an inlet air volume of 9 to 12 l / min. The nitrifying microorganisms are nitrosomonas and nitrobacter, and ammonia nitrogen is nitrite nitrogen by nitrosomonas. The nitrite nitrogen is converted to nitrate nitrogen by Nitrobacter, and the sulfated microorganism of the sulphate denitrification tank is Thiobacillus denitrificans or thiomicrospira. Denitripicans ( T hiomicrospira denitrificans) is characterized in that any one or a mixture of two or more selected.

The continuous batch reaction tank is configured to receive a nitrification microorganism continuously from the nitrification reaction tank, and the treated water of the continuous batch reaction tank is configured to flow into the desulfurization denitrification tank.

Hereinafter, the technical configuration will be described in more detail.

Since industrial wastewater containing high concentration of nitrogen has various sources and characteristics, it is not possible to treat all types of wastewater by one standardized method, so it is necessary to classify wastewater characteristics before constructing treatment method. Therefore, it is desirable to go through the water treatment process by accurately determining the wastewater type. Industrial wastewater containing high concentration of nitrogen was classified into the following three types. (It is classified based on the data of the research report (National Institute of Environmental Research) on the standard unit of wastewater discharge facility.) Electronic and food wastewater treatment facilities are classified according to RFP. Excluded from)

Table 1. Types of industrial wastewater containing high concentrations of nitrogen

division characteristic Discharge facility  Type 1   High concentrations of BOD and TN, 9-32 C / N ratio, self-denitrification wastewater) Coal compound production BOD 5,632mg / l, TN 595mg / l COD 2,489mg / l, SS 276mg / l BOD / N ratio 9.5   Coal Compound Butadiene Chemicals Sterilization / Pesticides / Agricultural Chemicals Cosmetic Toothpaste  Type 2   Wastewater that has high concentrations of BOD and TN, C / N ratio is 2 ~ 6, and does not maintain C / N ratio necessary for self denitrification due to BOD removal which is incidental to coagulation sedimentation treatment for SS removal. Facility BOD 809 mg / l, TN 376 mg / l COD 300 mg / l, SS 1,200 mg / l BOD / N ratio 2.2   Fertilizers / Nitrogen compounds Non-ferrous metals Smelting / Refining / Alloys Industrial gases Basic inorganic compounds Rubber and plastics Other fiber products Leather / fur processing / Products Glass / Glass products Petrochemical base compounds Synthetic fuels Softeners / Other colored synthetic resins / Other plastics  Type 3   Wastewater with low BOD concentration, high TN concentration and C / N ratio below 1) Steel pipe manufacturing facilities BOD 68mg / l, TN 162mg / l COD 94mg / l, SS 95mg / l BOD / N ratio 0.4   Metal casting Steel pipe manufacturing, Steel rolling, etc.Non-ferrous metal smelting / refining / alloy copper rolling extrusion / stretching products

As can be seen in Table 1, a large portion of companies that discharge high concentration nitrogen-containing wastewater belongs to wastewater type 2. In case of wastewater type 1 with high C / N ratio, nitrogen can be removed through general biological advanced treatment methods (MLE, A2 / O, SBR, etc.) without injecting external carbon sources. On the other hand, since the C / N ratio is inverted wastewater type 3 mainly occurs in the process of washing the metal product with nitric acid, nitrogen in the wastewater is in the form of NO ₃ -N can be treated by applying the denitrification only method.

However, in the case of wastewater type 2, since the high concentration of nitrogen in the form of NH ₄ -N is mainly present, the capacity of the reactor to secure the nitrification microorganism is increased and the sludge generation amount is increased, and the denitrification efficiency is lowered due to the low C / N ratio. Expensive external carbon sources (methanol) must be added. Therefore, the industry that discharges wastewater type 2 is constrained by the installation of the facility because of the large amount of land secured by the existing biological treatment method and the increase of maintenance costs required for the treatment of large amounts of sludge and the input of expensive external carbon sources. In addition, in terms of water conservation, a considerable amount of high nitrogen-containing wastewater is in type 2.

In the present invention, the concentrations of both BOD and TN are high and the C / N ratio is 2 to 6, and the wastewater that does not maintain the C / N ratio necessary for its own denitrification due to the BOD removal incidentally generated during the coagulation sedimentation treatment for SS removal is As the object of treatment, each method for the treatment of the wastewater will be described in detail.

NH ₄ -N adsorption and desorption step

Wastewater, which has undergone pretreatment such as coagulation sedimentation, passes through the zeolite adsorption tank to separate NH ₄ -N and the efficiency reaches 50%. The zeolite adsorption tank has a two-series configuration, in which one series undergoes ammonia adsorption while the other series alternately repeats desorption and thus there is no short circuit of time.

The reaction scheme for ammonia ion exchange and zeolite regeneration is as follows.

Ammonia Ion Exchange: Z-Na ⁺ + NH ₄ ⁺ -------- → Z-NH ₄ ⁺ + Na ⁺

Zeolite ^{_{reproduction: Z-NH 4 + + NaHCO}} 3 -------- → Z-Na + + NH 4 + + HCO 3 -

The chemical for regenerating the zeolite is NaHCO ₃ instead of using NaCl, which is generally used. use. That NaHCO ₃ The reason for the use is that when desorbed NH ₄ -N flows into the nitrification tank, 7.07g alkalinity (as CaCO ₃ ) / g NH ₄ -N and nitrification tank treated water will flow into the nitrification process. This is to supply 4.57g alkalinity (as CaCO ₃ ) / g NO ₃ -N, which is the alkalinity required by.

In other words, NaHCO ₃ which should be supplied to maintain the alkalinity of the nitrification tank and the desulfurization denitrification tank of the latter stage is used as a regeneration chemical for zeolite so that there is no extra alkalinity supply cost.

Removal of organic matter, residue NH ₄ -N nitrification, self denitrification and discharge steps

Wastewater from which the ammonia is separated by 50% from the zeolite adsorption tank secures an appropriate C / N ratio and is transferred to a continuous batch reactor (SBR) installed at the rear end to remove organic matter, nitrification of residual NH ₄ -N, and self denitrification. After treatment, it is discharged.

The reason for installing the sequencing batch reactor (SBR) to the zeolite adsorbent tank rear end is capable of flexible operation depending on the incoming water the aqueous phase than the MLE, A ² / O process and the operation is easy, and because a less energy consumption, 2,000m ³ / This is because most of the advanced biological treatment methods applied to small and medium-sized installations with d less than d are continuous batch reactors, and up to 4,000 m ³ / d are more economical.

The operating mode of the SBR is HRT 6 hours, 1 cycle 360 minutes, DO (mg / L) aerobic 2.0 ~ 6.0, anoxic 0.5 or more, pH 7.5 ~ 8.6, temperature 25 ℃, MLVSS (mg / L) 1618 Operating mode 1 or HRT 11 hours, 1 cycle 4620 minutes, DO (mg / L) aerobic 2.0 to 6.0, anoxic 0.5 or more, pH 7.5 to 8.6, temperature 25 ℃, MLVSS (mg / L) 934 It consists of two.

In the case of the operation mode 1, the organic matter removal rate is 31 to 55%, and in the case of nitrogen, 14 to 25.5%. In the case of the operation mode 2, the organic matter removal rate is 56 to 84%, and in the case of nitrogen, 64 to 93%. The condition of the operation mode 2 is preferable.

The continuous batch reactor (SBR) is continuously supplied with nitrification microorganisms from the nitrification tank to artificially increase the share of nitrification microorganisms of only 13.2% of the total microorganisms. On the other hand, in case of separation of NH ₄ -N, the C / N ratio is not adjusted to the proper ratio for denitrification, so that the treated water of the continuous batch reaction tank flows into the desulfurization denitrification tank in case it is necessary to treat residual NO ₃ -N. do.

Nitrification stage

Wastewater from which the ammonia is separated by 50% from the zeolite adsorption tank is transferred to a continuous batch reactor (SBR) and simultaneously transferred to the nitrification reactor to undergo nitrification.

The membrane module of the nitrification reactor (MBR) is a flat-sheet type, made of polyethylene, and having an effective pore size of 0.2 µm and an effective membrane area of 0.1 m2. Biological nitrification in Esau consists of two species: nitrosomonas, which oxidizes ammonia nitrogen to nitrite nitrogen, and nitrobacter, which oxidizes nitrite nitrogen to nitrate nitrogen. Heterotrophic organisms are autotrophic organisms because they get energy from oxidizing organic compounds, while they get energy from inorganic compounds.

In other words, the nitrification method in the nitrification tank is performed by converting ammonia nitrogen into nitrite nitrogen by nitrosomonas and by converting nitrite nitrogen into nitrate nitrogen by nitrobacter.

Therefore, the NH ₄ -N-containing water desorbed by the zeolite regeneration is introduced into the nitrification tank and converted into NO ₃ -N through the following reaction process by the nitrifying microorganism, an autotrophic bacterium.

NH ₄ ⁺ + 1.863 O ₂ + 0.098 CO ₂

_{→ 0.0196C 5 H 7 NO 2 +} 0.98NO 3 - + 0.0941H 2 O + 1.98H +

In this process, 4.2 g of O ₂ and 7.07 g of alkalinity (as CaCO ₃ ) are consumed to convert 1 g of NH ₄ -N, 0.16 g of cells are synthesized, and 0.08 g of inorganic carbon is used for cell synthesis. .

One of the key factors to judge the performance of nitrification reactor is NH ₄ -N load per tank volume. Based on previous studies on artificial wastewater, 3.3 kgNH ₄ -N / m ³ at MLVSS 6,300mg / l and HRT 5.7hr. It can be seen that the result of achieving 1.5 to 3.5 kgNH ₄ -N / m ³ · d was maintained in case of d and biofilm method.

The treated water which has undergone the treatment in the nitrification tank is introduced into the sulfate denitrification tank in the rear stage, and the surplus nitrifying microorganism is supplied to the continuous batch reactor (SBR) to induce the nitrification efficiency of the continuous batch reactor.

In particular, since the installation of the nitrification tank is directly related to the area and maintenance costs, it must be included in the treatment method. According to a study of 12 biologically advanced treatment facilities in the United States, the number of nitrifier microorganisms in the reactor is total microorganisms. Only 13.2% of the total. Because of the low occupancy rate of nitrification microorganisms, the treatment of wastewater containing NH ₄ -N requires an increase in reactor capacity to secure the nitrification population. As shown in Table 2, which is a comparison result for general sewage, it doubled than HRT required for BOD removal to remove NH ₄ -N which is only 25 mg / l. Therefore, when industrial wastewater treatment containing a high concentration of NH ₄ -N is approached in a general biological manner, the economic efficiency is greatly reduced because of the large increase in reactor capacity and airflow. Therefore, it is very effective to effectively obtain the nitrification microbial population in the whole reactor or to perform nitrification independently by separating NH ₄ -N.

Table 2 General Sewage Treatment Organic Sole Removal and  Including nitrification Design factor  compare( Metcalf  & Eddy , Wastewater Engineering Treatment and Reuse , 4 th edition , 2004)

division Organic matter removal Organic matter removal + nitrification Influent Quality (mg / l) BOD 140, COD 300, SS 70, NH ₄ -N 25 MLVSS (mg / l) 2,400 F / M (d ^-1 ) 0.33 0.16 BOD loading (kg / m ³ ) 0.78 0.37 SRT (d) 5.00 8.33 HRT (hr) 4.3 9.0

On the other hand, in the removal of nitrogen Anammox method removes nitrogen through the following reaction process by anaerobic ammonium oxide bacteria, such as autotrophs.

_{^{NH 4 + + 1.32NO 2 - +}} 0.066HCO 3 - + 0.13H +

^{_{→ 0.26NO 3 - + 1.02N 2 +}} 0.066C 5 H 7 O 2 N + 2.03H 2 O

N ₂ conversion of NH ₄ ⁺ in the above reaction scheme is NO ₂ with NH ₄ ^+, an electron acceptor with electron donor ^- and using the inorganic carbon source is HCO ₃ ^-, in using the NO in the waste water ₂ ^- / NH ₄ ⁺ ratio It must be at least 1.32. In order to meet the conditions of the NO ₂ ⁻ / NH ₄ ⁺ ratio, a method for limiting nitrification of NH ₄ ⁺ to NO ₂ ⁻ is required in the previous step.

The nitrification tank is operated by maintaining the inlet air amount at 9-12 L / min, and the inlet air amount is an appropriate amount to achieve perfect nitrification, and preferably maintains 10 L / min. At 10 l / min, almost complete nitrification is achieved even if the inlet ammonium concentration is high at 1000 mg / L.

Sulfate denitrification  And return step

In the nitrification tank, the nitrification of the wastewater is introduced into a sulfate denitrification tank.

The temperature of the desulfurization denitrification tank (4) was maintained at 30 ° C., which is an optimum condition for denitrification using sulfur, and pH 7.5 to 8.0, and the bacterium Tiobacillus denitrificans and T. micropyra denitripicans ( autotrophic sulfated microorganisms Thiomicrospira denitrificans) is _{^{S 2 -, S 0, S}} 2 O 3 2 - of the sulfur compounds SO ₄ ^- in the course of oxidation with HCO ₃ ^- an inorganic carbon, such as carbon sources, and a final electron acceptor, Denitrification is completed using NO ₃ ^- as the base.

^{_{NO 3 - + 1.10S + 0.40CO 2}} + 0.76H 2 O + 0.08NH 4 +

→ 0.5N ₂ + 1.10SO ₄ ^2- + 1.28H ⁺ + 0.08C ₅ H ₇ O ₂ N

In the course of the reaction, 2.51 g of S and 4.57 g of alkalinity (as CaCO ₃ ) are consumed to convert 1 g of NO ₃ -N and 7.54 g of SO ₄ ^{2 -} is generated. In the case of heterotrophic bacteria, the amount of external carbon source methanol (CH ₃ OH) required to convert 1 g of NO ₃ -N is 2.47 g, which is similar to the consumption of S, but the commercial S price is only 60% of methanol. Sulfation denitrification is economical. The alkalinity does not need to be supplied separately because HCO ₃ ^- generated during regeneration of zeolite is consumed in the nitrifier and the remaining amount is introduced. On the other hand, the effluent from the sulfidation denitrification tank is circulated to the feed water required for zeolite regeneration.

As described above, the high concentration nitrogen-containing industrial wastewater treatment method according to the present invention can reduce the nitrogen load discharged into the water system and reduce the amount of nitrogen flowing into the wastewater end treatment facility by securing the treatment capacity of the individual discharge facility. The budget for advanced treatment of the terminal treatment facility can be reduced.

High concentration ammonia nitrogen wastewater can be treated by ion exchange and regeneration with zeolite for adsorption of ammonia continuously in the adsorption tank and using the waste liquid as ammonia source and alkalinity source for nitrifying microorganism. It can provide the basis on which the sulphate denitrification is applied to the treatment of metal-related industrial wastewater, in which acidic nitrogen is the mainstream.

And a huge national budget should be set to improve the current end treatment facility to achieve the TN 20 mg / l emission standard for wastewater treatment plants to be effective from 1 January 2013. At this point, if technology is developed that can deal with high concentrations of nitrogen-containing wastewater at a realistic cost, the government and local governments may require that individual sites within the terminal treatment facility area be linked after reducing the nitrogen load. If the policy is decided in this direction, the national budget for the advanced treatment of wastewater treatment facilities will be saved.

Hereinafter, the technical configuration will be described in more detail with reference to the accompanying drawings.

1 and 6 schematically show a process and a flow chart according to the high concentration nitrogen containing industrial wastewater treatment method, the high concentration nitrogen containing industrial wastewater treatment method of the present invention, first, the wastewater that has undergone the coagulation sedimentation pretreatment process 2 of FIG. and it flows into the zeolite adsorbent (1) having a series configuration separation of NH ₄ -N through the zeolite adsorption process and the ammonia separated from the adsorption-desorption step passes through a desorption process of NH ₄ -N through the zeolite regeneration Going through,

Wastewater from which ammonia is separated through the zeolite adsorption process of the zeolite adsorption tank 1 is transferred to the continuous batch reactor 3 of FIG. 4 to be discharged after removal of organic matter, residual NH ₄ -N nitrification, and self-denitrification. It goes through the steps.

In addition, the nitrification step of transferring the NH ₄ -N-containing water desorbed through the zeolite regeneration process of the continuous batch reaction tank (3) to the nitrification reaction tank (2) of FIG. 3 and converted to NO ₃ -N by the nitrification microorganism;

The nitrification reactor (2) nitrification is to transfer a complete waste into sulfated denitrification tank 4 of Figure 5 of sulfur compound S ₂ in the ^{_{-, S0, S 2 O 3}} 2 - by the sulfation microorganism SO ₄ ^- in the oxidation The high concentration nitrogen-containing industrial wastewater is treated through a sulphation denitrification step which is returned to the zeolite adsorption tank 1 and circulated to the feed water required for zeolite regeneration.

1 is a process chart showing a high concentration nitrogen-containing industrial wastewater treatment method according to the present invention.

2 is a schematic cross-sectional view showing a zeolite adsorption tank according to the present invention.

3 is a schematic cross-sectional view showing a nitrification tank according to the present invention.

4 is a schematic cross-sectional view showing a continuous batch reactor (SBR) according to the present invention.

5 is a schematic cross-sectional view showing a sulfate denitrification tank according to the present invention.

6 is a flow chart according to the high concentration nitrogen-containing industrial wastewater treatment method according to the present invention.

Explanation of symbols on the main parts of the drawings

1: zeolite adsorption tank

2: nitrification tank (MBR)

3: continuous batch reactor (SBR)

4: sulfate denitrification tank

10: treatment tank

Claims (5)

Wastewater, which has undergone coagulation pretreatment and pretreatment, is introduced into the zeolite adsorption tank (1) having a two-stage configuration, while one series undergoes NH ₄ -N separation through zeolite adsorption and the other series undergoes ammonia separation and zeolite regeneration. Adsorption and desorption step of proceeding the desorption process of NH ₄ -N through the alternating manner, so that there is no short circuit of time by alternating the same manner, Wastewater from which ammonia was separated through the zeolite adsorption process of the zeolite adsorption tank (1) was transferred to a continuous batch reactor (3) for 6 hours, 1 cycle of 360 minutes, DO (mg / L) aerobic 2.0 to 6.0, anoxic 0.5 Above, pH 7.5 ~ 8.6, temperature 25 ℃, MLVSS (mg / L) 1618, operation mode 1 or HRT 11 hours, 1 cycle 4620 minutes, DO (mg / L) aerobic 2.0 ~ 6.0, anoxic 0.5 or more, pH Discharged after removal of organic matter, residual NH ₄ -N nitrification and self-denitrification through operation mode 2 of 7.5 to 8.6, temperature 25 ° C., MLVSS (mg / L) 934, A nitrification step of transferring the NH ₄ -N-containing water desorbed through the zeolite regeneration process of the continuous batch reaction tank 3 to the nitrification reactor 2 and converting it into NO ₃ -N by the nitrification microorganism; The nitrification reactor (2) nitrification is complete, feeding the waste water to sulfated denitrification tank 4 in the sulfur compound ^{_{S 2 -, S0, S 2}} O ₃ ^2- to SO ₄ by sulfating ^{microorganism-oxidized} back to the zeolite, A high concentration nitrogen-containing industrial wastewater treatment method comprising the step of returning to the adsorption tank (1) and circulating the denitrification step to circulate with feed water for regeneration of zeolite. delete The method of claim 1, wherein the nitrification microorganism of the nitrification step is Nitrosomonas, Nitrobacter, wherein ammonia nitrogen is converted to nitrous nitrogen by Nitrosomonas, the nitrite nitrogen A high concentration nitrogen-containing industrial wastewater treatment method, characterized in that the conversion to nitric acid nitrogen by Nitrobacter. 2. The continuous batch reaction tank (3) according to claim 1, wherein the continuous batch reaction tank (3) is connected to receive the nitrification microorganisms from the nitrification reaction tank (2), and the treated water of the continuous batch reaction tank (3) flows into the sulfidation denitrification tank (4). High concentration nitrogen-containing industrial wastewater treatment method characterized in that it is configured to be connected. According to claim 1, Sulfation denitrification step is to maintain the temperature of the desulfurization denitrification tank (4) at 30 ℃, pH 7.5 ~ 8.0 to Thiobacillus denitrificans (Thiobacillus denitrificans) or thiomicrospyranite tree A method for the treatment of high concentration nitrogen-containing industrial wastewater, characterized in that it uses a sulfated microorganism, which is one or a mixture of two or more selected from Pecans ( T hiomicrospira denitrificans).

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