KR100300820B1 - Advanced Treatment Method for Sewage or Industrial Waste Water - Google Patents

Abstract

The present invention relates to a method for advanced treatment of sewage and wastewater, comprising: a first anoxic reaction tank for denitrifying a nitrogen oxide contained in a conveying sludge using organic materials in the introduced wastewater, aerobic decomposition of organic matter, organic nitrogen and ammonia nitrogen; Aerobic reaction tank for nitrifying nitrate to nitrogen oxide, food waste fermented in fermentation tank, livestock manure, harvesting manure, organic waste generated from industrial plant, etc. It consists of intermittent aeration tank where nitrification and denitrification of nitrogen compounds added through organic wastes supplied from the previous stage and organic wastes supplied in the previous stages, and sedimentation basin to precipitate solids and separate clean symbolic water. It is effective to remove with high efficiency.

Description

Advanced Treatment Method for Sewage or Industrial Waste Water}

The present invention relates to an advanced treatment method for sewage and wastewater, and more particularly, to an advanced treatment method for sewage and wastewater, which is capable of treating organic matter, nitrogen and phosphorus, which have an adverse effect on the water quality, with high efficiency.

In general, pollutants in sewage include organic substances and nutrients such as nitrogen and phosphorus. Among them, nutrients nitrogen and phosphorus cause eutrophication in rivers and lakes, and cause red tide in the ocean. Severe eutrophication causes odors and water pollution, as well as limiting the use of drinking water and waterways. Therefore, in order to prevent eutrophication of water systems, nitrogen compounds or phosphates, which are nutrients, must be removed from sewage treatment plants, and biological treatment methods are mainly used.

Such a biological treatment method can be described as follows.

First, the ammonia nitrogen is oxidized by nitrifying bacteria in aerobic state and converted into nitrate. In anoxic state, nitrate-type combined oxygen is reduced to free nitrogen by using dissolved oxygen as a substitute for dissolved oxygen. Nitrogen is removed. Organic matter is taken as an electron donor in the process of reducing to a glass nitrogen state, and the method of supplying organic matter for denitrification in anoxic state is very important in biological denitrification. Most nitrification and denitrification methods are divided into total denitrification method using organic substances contained in sewage and post denitrification method used for denitrification by separately supplying organic substances such as methyl alcohol from the outside.

However, in the total denitrification method, the denitrification efficiency is low when the dissolved organic matter concentration which microorganisms can easily use in the inflow sewage is low. However, the cost burden was great because the electron donor required for denitrification must be supplied separately.

The present invention has been made to solve the above problems, and the advanced treatment of sewage and wastewater with high nitrogen removal efficiency by minimizing maintenance costs by minimizing maintenance costs by harmonizing not only denitrification method but also total denitrification and intermittent aeration method. The purpose is to provide a method.

In the advanced treatment method of sewage and wastewater of the present invention for achieving the above object, the first anoxic reaction tank for denitrifying the introduced wastewater under anoxic conditions, aerobic decomposition of organic matter and nitrification of organic nitrogen and ammonia nitrogen with nitrogen oxides The aerobic reaction tank, the second anoxic reaction tank for denitrifying the nitrogen oxides introduced from the aerobic reaction tank by injecting the organic waste fermentation broth, and the nitrification and denitrification of the nitrogen compounds added with the organic waste supplied in the previous step by decomposing the remaining organic matter. It consists of an intermittent aeration tank, a sedimentation basin for sedimentation of solids and the separation of clean symbolic water, and a sludge conveying process for recovering the solids precipitated in the sedimentation basin and returning it to the first anoxic reaction tank.

Such advanced treatment of sewage and wastewater according to the present invention maximizes the denitrification efficiency by properly combining the advantages of the total denitrification method, the post denitrification method and the intermittent aeration method, and the total denitrification method is applied by the first anoxic reactor. By the second anoxic reaction tank and the intermittent aeration tank, the denitrification method and the intermittent aeration method are configured to be applied simultaneously. In the first anoxic reaction tank, the organic matter contained in the influent sewage water is used for the denitrification reaction of the nitrogen oxide contained in the return sludge. In the aerobic reaction tank, the nitrification reaction and the decomposition of the remaining organic matter are performed by the action of aerobic microorganisms. In the second anoxic reaction tank into which the effluent of the aerobic reaction tank containing nitrogen oxide is introduced, an organic waste fermentation broth is injected to allow nitrogen oxide denitrification to proceed, and in an intermittent aeration tank, additional organic waste is supplied to the second anoxic reaction tank. The nitrification and denitrification of the nitrogen compounds is carried out, the remaining organic substances are decomposed, the sludge is returned from the sedimentation basin, and the clean symbol water is discharged.

Therefore, in the advanced treatment method of sewage and wastewater according to the present invention, the nitrogen oxide contained in the influent sewage and sludge conveying water in the first anoxic reaction tank is denitrified by the total denitrification method, and the amount of organic matter required in the subsequent denitrification process is followed. In the second anoxic reactor, the organic waste fermentation broth is injected separately to be utilized for the denitrification of nitrogen oxides that are nitrified and introduced in the aerobic reactor, while the sedimentation of sludge is improved and the residual organic matter is decomposed in the intermittent aeration tank. In the previous step, nitrification and denitrification of the added nitrogen compounds takes place through the waste fermentation broth.

In addition, the organic material used for post-denitrification in the anoxic reaction tank utilizes a fermentation broth produced by fermenting food waste, livestock manure, collected manure, organic waste generated in an industrial plant or other organic waste in a fermentation tank separately provided, such as methanol. There is no need to purchase organic materials, and the raw sludge withdrawn from the preliminary settler is fermented in the fermenter and used for denitrification.

In addition, in the first or second anoxic reaction tank, phosphorus is released from activated sludge, but the anoxic condition in which binding oxygen such as nitrogen oxide is present is low, and thus the phosphorus emission efficiency is low, so it is active in the next step of the second anoxic reaction tank. When an anaerobic reaction tank is added to allow the phosphorus to be released from the sludge, more phosphorus is taken up than the one released in the intermittent aeration tank, thereby improving the efficiency of phosphorus removal.

1 and 2, 3 and 4 is a configuration of the wastewater treatment method according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: first anoxic reactor 2: aerobic reactor

3: second anoxic reactor 4: intermittent aeration tank

5: sedimentation basin 6: return sludge

7: fermentation tank 8: preliminary precipitator

9: fermentation broth 10: fresh sludge

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1 is a process flow chart of the first embodiment of the advanced sewage treatment method according to the present invention, the influent sewage waste water in the first anaerobic reaction tank (1), aerobic reaction tank (2), the second anoxic reaction tank (3), intermittent aeration tank (4) and The sewage treatment method of sequentially passing through the sedimentation basin 5 is shown. At this time, it is possible to inject the waste fermentation broth 9 separately into the second anoxic reactor 3. In the sedimentation basin 5, the effluent water of the intermittent aeration tank 4 is separated into solid-liquid, the supernatant is discharged as treated water, and the precipitated solids are returned to the first anoxic reaction tank 1 as the return sludge 6. And the fermentation broth (7) and fermentation of organic waste produced by the fermentation broth (9) is configured to be injected into the second anoxic reaction tank (3).

In detail with respect to each unit process, the first anoxic reaction tank 1 is a unit process in which the total denitrification is carried out, the wastewater and the returning sludge 6 is introduced into the wastewater and the returning sludge contained in the aeration aeration Nitrogen oxides are denitrified using the organics contained in the influent sewage.

In this way, the first anoxic reaction tank 1 is used for denitrification of the organic matter in the influent sewage wastewater, so that the organic matters required in the subsequent post-nitridation process can be reduced, so that the organic matters are insufficient. Do.

In the aerobic reaction tank (2), the organic matter is decomposed under aerobic conditions, the nitrification reaction is carried out in which ammonia nitrogen and the like are converted into nitrate nitrogen, and the reaction solution containing nitrate nitrogen is introduced into the anoxic reaction tank (3) which is a subsequent process. This is to allow the post-denitrification reaction to proceed.

In the second anoxic reaction tank (3), denitrification is carried out by a post-denitrification method of nitrate nitrogen remaining in the effluent of the aerobic reaction tank (2), and organic substances such as methyl alcohol and organic acids should be injected. However, even though the nitrogen oxide is partially removed by the total denitrification in the previous step, the supply of organic alcohol is reduced, and the economic burden of purchasing and using methyl alcohol and organic acid is increased. Therefore, in the present invention, the fermentation tank 7 is provided with a second fermentation broth 9 containing fermentation broth 9 containing organic acids and the like produced by fermenting organic waste generated from food waste, livestock manure, collected manure, and industrial plants. It is injected into (3) and used for denitrification reaction.

In the intermittent aeration tank (4), in the aerobic condition, that is, in the abandoned state, the remaining organic matter which has not been decomposed and introduced in the previous step is aerobicly decomposed and nitrification of nitrogen compound added through the organic waste fermentation broth (9) supplied to the second anoxic reaction tank (3). The reaction proceeds. In addition, denitrification of nitrogen oxides occurs under anoxic conditions, that is, aerobic agitation. In this case, organic matter and residual organics introduced by endogenous respiration of microorganisms are used.

In the case of using pure carbohydrates that do not contain nitrogen compounds such as methanol and organic acids in the second anoxic reaction tank (3), the effluent of the intermittent aeration tank (4), which is the final reaction tank, is almost free of nitrogen. However, when fermenting organic wastes containing nitrogen compounds such as protein, urea, and ammonia, such as food waste and livestock manure, the nitrogen compounds contained in these wastes are fermented through the fermentation broth (9). ) And is discharged via the settling basin (5), the nitrogen removal efficiency in the treated water is not sufficient.

As described above, in order to solve the problem of the present invention in which the nitrogen compound is inevitably added through the waste fermentation broth 9 used for the denitrification reaction by the post-nitrogenation method in the second anoxic reaction tank 3, the intermittent aeration tank 4 is added. It is operated by intermittent aeration method to nitrify the nitrogen compound and denitrification reaction in parallel. In this way, the intermittent aeration tank 4 is operated by the intermittent aeration method in which the aerobic conditions and the anoxic conditions are alternately repeated, so that nitrification and denitrification are performed to remove nitrogen added by the injected organic fermentation broth 9 again. Therefore, in the second anoxic reactor 3, organic wastes containing nitrogen compounds can also be used, which is economical.

Thereafter, the effluent of the intermittent aeration tank 4 flows into the sedimentation basin 5, and solid-liquid separation is performed. The precipitated sludge is returned to the first anoxic reaction tank 1, and the clean symbol water is discharged into the treated water.

As described above, since the organic matter in the influent sewage waste water can be removed by the total denitrification used for the denitrification reaction by the first anoxic reaction tank (1), the amount of organic matter to be separately supplied for post-denitrification is significantly reduced. It becomes possible. In addition, since the second anoxic reaction tank (3) and the intermittent aeration tank (4) also have a denitrification and intermittent aeration method, it is possible to remove nitrogen compounds added through the organic waste fermentation broth (9). Wastes can also be used for denitrification, and high efficiency removal of organics and nitrogen.

And the fermentation tank (7) is to use the fermentation broth (9) containing the organic acid produced by fermenting the organic waste in order to supply the organic material for the denitrification reaction in the second anoxic reaction tank (3), an electron donor, Unlike the anaerobic digestion tank that has been mainly used for sludge reduction and methane gas production in a conventional sewage treatment plant, the fermentation tank (7) terminates the fermentation in the organic acid fermentation step, so it is very easy to operate. In addition, the fermentation broth 9, which is a fermentation product of organic waste, has the most acetate, a mixture of butyl salt, propyl salt, and alcohols, and can be effectively used for denitrification because microorganisms can easily decompose.

In addition, as the organic acid fermentation proceeds in the fermentation tank (7), hydrogen ion concentration is excessively increased, and an alkaline agent may be required for effective fermentation, and thus, ferric salt may be generated because emulsified hydrogen gas is generated. Inject or the generated gas is blown into the aerobic reaction tank (2) to cause aerobic decomposition of odor causing substances.

The fermentation broth 9 may include inorganic solids or organic solids that cannot be decomposed, and when such solids are injected into the second anoxic reactor 3, the solid organic matters are gradually decomposed to form the sedimentation basin 5 or the sedimentation basin 5. Organic matter is eluted in the aerobic reaction tank close to, which may adversely affect the treated water quality. In addition, since the inorganic solid is circulated in the water treatment process through the conveying sludge (6), the active sludge is reduced in the composition ratio of the active microorganisms that contribute to the reaction, the sludge activity is also reduced. Therefore, it is preferable to add solid-liquid separation means (not shown) to the fermentation tank 7 so that the filtrate from which the solids are separated is injected into the second anoxic reaction tank 3.

Phosphorus may be released from the microorganisms in the first or second anoxic reaction tanks (1,3), but the release rate of phosphorus is low due to the presence of bound oxygen such as nitrogen oxides. Therefore, an anaerobic reaction tank (not shown) is placed behind the second anoxic reaction tank (3). ] To allow phosphorus to be released and to eliminate excess intake of phosphorus in the first vessel (4).

In particular, when the aeration equipment is placed in the first anoxic reaction tank (1) and abandoned intermittently, aerobic conditions, that is, in the abandoned state, aerobic decomposition of the residual wastewater and residual organic matter contained in the return sludge (6) and ammonia properties introduced or generated. By nitrifying a portion of the cow it is possible to reduce the load of the subsequent aerobic reaction tank (2).

FIG. 2 shows the sewage flowing through the preliminary sedimentation wastewater (8), the first anoxic reaction tank (1), the aerobic reaction tank (2), the second anoxic reaction tank (3), the intermittent aeration tank (4), and the sedimentation basin (5). In the advanced treatment method of wastewater, the solids separated from the preliminary settler 8, that is, the raw sludge 10 contained in the influent sewage water, are fermented in the fermentation tank 7 to separately supply organic wastes. It shows a wastewater treatment method used for denitrification in the second anoxic reactor 3 without receiving. In this embodiment, since the organic load of the aerobic reaction tank 2 is reduced and the raw sludge 10 in which the odor is generated is fermented and used for the denitrification reaction, the nitrogen removal efficiency is improved, as well as the amount of sludge generated and the amount of organic matter introduced from the outside are reduced. It is advantageous.

The dissolved organic matter in the influent sewage is easily decomposed by the microorganisms in the first anoxic reaction tank (1), so it can be usefully used for denitrification, but the solid organic matter that is not decomposed is not easily used for the denitrification reaction. Only organic load can be increased.

Therefore, in the present embodiment, the fermentation broth 9 converted into organic acid, which is easily decomposed by fermenting the solid organic matter in the influent sewage precipitated in the preliminary precipitator 8, into the second anoxic reaction tank 3 It is possible to improve the denitrification efficiency by injecting to the denitrification reaction and other matters are the same as in the embodiment of FIG.

However, since the solids contained in the influent sewage water may not meet the amount of organic matter required for denitrification, organic matter may be added directly to the fermentation tank (7) or organic waste may be added to the sewage influent so that the organic matter may be replenished. 3 and 4.

FIG. 3 shows the sewage flowing through the preliminary sedimentation wastewater (8), the first anoxic reaction tank (1), the aerobic reaction tank (2), the second anoxic reaction tank (3), the intermittent aeration tank (4), and the sedimentation basin (5). In the advanced treatment method of wastewater, the fermentation tank (7) is provided and the organic wastes are introduced into the inflow water so that the solids separated from the preliminary settler (8), that is, the solids contained in the influent wastewater and the organic wastes are fermented in the fermentation tank (7). Shows the wastewater treatment method using the fermentation broth (9) generated in the second anoxic reactor (3) for denitrification.

Organic wastes such as food waste to be fermented and used for denitrification have a high content of solid organic matter, but some organic matters are fermented or decayed during the collection process, and are converted into dissolved organic nitrogen or ammonia nitrogen. It is converted into the same low-molecular-weight substances that cannot be precipitated, and these low-molecular materials are included. Among them, alcohols, organic acids and the like can be usefully used for denitrification because they are easily decomposed by microorganisms.

However, when all the organic waste is fermented in the fermentation tank (7), liquid low molecular weight organic matters such as alcohol and organic acid also stay together for the time that the solid organics are fermented and decomposed into final decomposition products such as methane gas to be used for denitrification. Since it is not possible to waste organic matter, and the low molecular nitrogen compound directly flows into the second anoxic reaction tank (3), the nitrogen load is increased in the second anoxic reaction tank (3) and the intermittent aeration tank (4), which may lower nitrogen removal efficiency. .

Therefore, in the present embodiment, the organic wastes, such as food waste, are mixed and dilute in the inflow sewage to solid-liquid separation in the preliminary precipitator 8, so that the dissolved organic matter contained in the sewage and organic waste that cannot be precipitated in the preliminary precipitator 8 is first. It is introduced into the oxygen-free reaction tank (1) and used for denitrification by the total denitrification method, and the solid organic matter contained in the sewage and organic waste precipitated in the preliminary precipitator (8) is transferred to the fermentation tank (7) for fermentation of organic acid and the second. Since it is used for the denitrification reaction in the oxygen-free reaction tank (3), organic matter is not wasted and nitrogen removal efficiency can be improved.

In addition, since the organic waste may include coarse contaminants such as wood chips and plastic bags, it is preferable to remove them with a screen or the like before inputting. Since almost all wastewater treatment plants are equipped with pretreatment facilities such as screens for removing contaminants before the wastewater flows into the preliminary settler 8, it is also preferable to introduce the organic waste at the previous stage of the screening process (not shown).

4 is a sewage in which the influent wastewater sequentially passes through a preliminary settler 8, a first intermittent aeration tank 1, an aerobic reaction tank 2, an anaerobic reaction tank 3, a second intermittent aeration tank 4, and a sedimentation basin 5; In the advanced wastewater treatment method, the organic waste is provided to the fermentation tank (7), and the raw sludge (10) contained in the solid waste separated from the preliminary settler (8), that is, the influent wastewater (10). The wastewater treatment method using the fermentation broth 9 produced by fermentation in the fermentation tank 7 for denitrification in the second anoxic reactor 3 is shown.

In the present embodiment in which organic waste is directly injected into the fermentation tank (7), unlike in the third embodiment, the organic waste is composed of a relatively uniform high molecular material and low molecular weight or low molecular organic nitrogen which is finally decomposed to the gas state in the fermentation step. This is an embodiment which can be advantageously applied when the content is not contained or the content is small.

In addition, in the embodiments of FIGS. 2, 3, and 4, as in the embodiment of FIG. 1, an anaerobic reaction tank may be provided between the second anoxic reaction tank 3 and the intermittent aeration tank 4 to increase phosphorus removal efficiency. have.

As described above, the method for removing nitrogen and phosphorus using the fermentation waste according to the present invention using food waste, collected manure, livestock manure, organic by-products or other organic waste generated in an industrial plant as an electron donor for denitrification reaction When used, it is possible to realize the advantages of the post-denitrification method in an economical way without purchasing methyl alcohol, and to add the total denitrification method and intermittent aeration method, so that the organic substances used in the denitrification reaction can be added. Nitrogen compounds are also effectively removed, allowing high efficiency removal of nitrogen and phosphorus, which can severely affect lake eutrophication. In addition, waste manure and livestock manure, which are struggling with treatment, can be used as a resource for nitrogen and phosphorus removal. In particular, food waste, which is emerging as a social issue such as transportation cost and leachate generation due to long distance transportation, can be effectively disposed of in a sewage treatment plant that is easily transported since it is installed at a relatively short distance from the city where food waste occurs compared to a landfill. At the same time, the life of the landfill can be extended.

Claims (15)

A first anoxic reactor for denitrifying the nitrogen oxides in the influent and the return sludge using organics in the influent sewage, an aerobic reactor for the aerobic decomposition of organics and nitrifying organic nitrogen and ammonia nitrogen with nitrogen oxides, and nitrogen oxides separately The second anoxic reactor for denitrification by the supplied organic matter, the intermittent aeration tank for decomposing the remaining organic matter and nitrifying and denitrifying additional nitrogen compounds introduced through the organic matter injected in the previous step, and depositing the solids, and the clean symbol water flows out as treated water. In the sewage treatment process to sequentially pass through the settling basin, and to return the precipitated solids to the first anoxic reactor as a return sludge, The fermentation tank is provided with food waste, livestock manure, harvesting manure, organic waste or other wastes generated in an industrial plant, and fermentation broth produced by fermenting in the fermentation tank is introduced into the second anoxic reactor, characterized in that for use in denitrification reaction. Advanced treatment of sewage and wastewater. The method for treating sewage and wastewater according to claim 1, wherein the intermittent aeration tank is subjected to an anaerobic reaction tank for releasing phosphorus from microorganisms as a subsequent step of the second anoxic reaction tank. The method of claim 1, wherein the injecting the fermentation broth produced in the fermentation tank to the second anoxic reaction tank, characterized in that to inject the liquid fermentation broth through a solid-liquid separation step to remove the solids in the fermentation broth into the second anoxic reaction tank. Advanced treatment of sewage and wastewater. The method of claim 1, wherein air is intermittently introduced into the first anoxic reactor. Preliminary precipitator for sedimentation and separation of solids from influent sewage water and extraction of fresh sludge and outflow of supernatant water to the subsequent process, the first anaerobic reactor for denitrification of nitrogen oxide contained in influent and return sludge, aerobic decomposition of organic matter and organic nitrogen And an aerobic reaction tank for nitrifying ammonia nitrogen to nitrogen oxides, a second anoxic reactor for denitrifying nitrogen oxides by an organic material supplied separately, and denitrifying residual nitrogen and nitrifying additional nitrogen compounds through the organic material injected in the previous step. In the wastewater treatment process in which the denitrified intermittent aeration tank and solids are precipitated, and the purified symbolic water is sequentially passed through the settling basin to be discharged as treated water, and the precipitated solids are returned to the first anoxic reaction tank as a return sludge. And a fermentation broth produced by fermenting the fresh sludge generated in the preliminary precipitator in the fermentation tank into the second anoxic reaction tank and using the denitrification reaction for treating the sewage and wastewater. The method for treating sewage and wastewater according to claim 5, wherein the intermittent aeration tank is subjected to an anaerobic reaction tank for releasing phosphorus from microorganisms as a subsequent step of the second anoxic reaction tank. The method of claim 5, wherein the injecting the fermentation broth produced in the fermentation tank to the second anoxic reaction tank, characterized in that to inject the liquid fermentation broth through a solid-liquid separation step to remove the solids in the fermentation broth into the second anoxic reaction tank Advanced treatment of sewage and wastewater. Preliminary precipitator for sedimentation and separation of solids from influent sewage water and extraction of fresh sludge and outflow of supernatant water to the subsequent process, the first anaerobic reactor for denitrification of nitrogen oxide contained in influent and return sludge, aerobic decomposition of organic matter and organic nitrogen And an aerobic reaction tank for nitrifying ammonia nitrogen to nitrogen oxides, a second anoxic reactor for denitrifying nitrogen oxides by an organic material supplied separately, and denitrifying residual nitrogen and nitrifying additional nitrogen compounds through the organic material injected in the previous step. In the wastewater treatment process in which the denitrified intermittent aeration tank and solids are precipitated, and the purified symbolic water is sequentially passed through the settling basin to be discharged as treated water, and the precipitated solids are returned to the first anoxic reaction tank as a return sludge. The fermentation tank is provided, and the influent sewage is mixed and diluted with food waste, livestock manure, collected manure, organic waste or other wastes generated in an industrial factory, and the fermentation broth produced by fermenting the solid precipitated in the preliminary precipitator in the fermenter. The high treatment method of sewage and wastewater, characterized in that the injection into the second anoxic reaction tank used for the denitrification reaction. The method of claim 8, wherein the intermittent aeration tank is preceded by an anaerobic reaction tank for releasing phosphorus from microorganisms as a subsequent step of the second anoxic reaction tank. The method of claim 8, wherein the injecting the fermentation broth produced in the fermentation tank to the second anoxic reaction tank, characterized in that to inject the liquid fermentation broth through a solid-liquid separation step to remove the solids in the fermentation broth into the second anoxic reaction tank. Advanced treatment of sewage and wastewater. 10. The method of claim 8, wherein the input of the organic waste into the influent sewage is made at the stage of the screening process of the influent sewage flowing into the preliminary settler. Preliminary precipitator for sedimentation and separation of solids from influent sewage water and extraction of fresh sludge and outflow of supernatant water to the subsequent process, the first anoxic reaction tank for denitrification of nitrogen oxide contained in influent and return sludge, organic matter decomposing and An aerobic reaction tank for nitrifying ammonia nitrogen to nitrogen oxides, a second anoxic reactor for denitrifying nitrogen oxides by an organic material supplied separately, and nitrifying and denitrifying nitrogen compounds introduced through the organic matter injected in the previous step by decomposing the remaining organic materials. In the wastewater treatment process in which the intermittent aeration tank and the solid matter are precipitated, and the clean symbol water is sequentially passed through the sedimentation basin to be discharged as treated water, and the precipitated solid material is returned to the first anoxic reaction tank as a return sludge. The fermentation tank is provided with food waste, livestock manure, manure, organic waste or other wastes generated in an industrial plant, and the fermentation broth produced by fermentation in the fermentation tank together with the raw sludge generated in the preliminary settler. (2) An advanced treatment method for sewage and wastewater, which is injected into an anoxic reaction tank and used for denitrification. The method for treating sewage and wastewater according to claim 12, wherein the intermittent aeration tank is subjected to an anaerobic reaction tank for releasing phosphorus from microorganisms as a subsequent step of the second anoxic reaction tank. The method of claim 12, wherein the injecting the fermentation broth produced in the fermentation tank to the second anoxic reaction tank, characterized in that to inject the liquid fermentation broth through a solid-liquid separation step to remove the solids in the fermentation broth into the second anoxic reaction tank. Advanced treatment of sewage and wastewater. 13. The method of claim 12, wherein the input of the organic waste into the influent sewage is performed at a previous stage of the screening process of the influent sewage flowing into the preliminary settler.