KR100822667B1 - Advanced treatment apparatus for sewage using the sy-sfbnr - Google Patents

Abstract

An apparatus for advanced treatment of wastewater is provided to purify wastewater by sequentially passing wastewater through an anaerobic buffer tank, an anoxic heterotrophic denitrifying spiral biofilm reactor and an aerobic autotrophic nitrifying spiral biofilm reactor, and purify wastewater again through denitrification by returning nitrate-nitrogen(NO3^--N) produced in the nitrifying spiral biofilm reactor in an amount corresponding to 1 to 4 times of a flow amount of the influent. An apparatus for advanced treatment of wastewater comprises: an anaerobic buffer tank(10) having a wastewater inflow passage(11), an outlet(12), and a sludge discharge port(13); an anoxic heterotrophic denitrifying spiral biofilm reactor(20) comprising a carrier tank(21), a carrier including a distribution pipe(23) having a plurality of through-holes formed in an outer peripheral surface thereof and a biofilm having a sheet spirally wound on the distribution pipe, and denitrifying bacterial adhered to both faces of the sheet, and a denitrifying tank(28) installed under the carrier to contain wastewater squirted from the carrier tank(21); an aerobic autotrophic nitrifying spiral biofilm reactor(30) comprising a carrier tank(31), a carrier including a distribution pipe(33) having a plurality of through-holes formed in an outer peripheral surface thereof and a biofilm having a sheet spirally wound on the distribution pipe, and nitrifying bacterial adhered to both faces of the sheet, and a nitrifying tank(38) installed under the carrier to contain wastewater squirted from the carrier tank; a communication tank(40) for communicating the anaerobic buffer tank with the denitrifying tank, and communicating the denitrifying tank with the nitrifying tank; rotary pumps(51) and return pipes(50) for connecting upper parts of the carrier tanks of the denitrifying spiral biofilm reactor and the nitrifying spiral biofilm reactor to the denitrifying tank and the nitrifying tank; a return line(60) for connecting the nitrifying tank to the wastewater inflow passage; a pump(71) and a return line(70) for flowing sediments in the carrier tanks into the anaerobic buffer tank; and a discharge line(80) connected to the nitrifying tank.

Description

Advanced Treatment Apparatus for sewage using the SY-SFBNR}

The present invention relates to an advanced processing apparatus. In more detail, in the purification of wastewater, the anaerobic buffer tank, anoxic heterotrophic denitrification spiral biofilm reactor, and aerobic autotrophic nitrification spiral biofilm reactor are sequentially purified, but the nitrate produced in the nitrified spiral biofilm reactor It is an advanced wastewater treatment system that allows the regeneration of denitrification by recirculating nitrogen (NO ₃ ^-- N) at 1-4 times the influent flow rate.

The present invention relates to an advanced treatment apparatus for purifying sewage, and in particular, organic substances and total nitrogen are removed by helical biofilm reactors DN-SFBNR and N-SFBNR through nitrate bacteria, which are self-affecting microorganisms, and denitrification bacteria, which are heterotrophic microorganisms. A device for treating phosphorus absorbed by microorganisms by periodically discharging desorption microorganisms from the surface of a biofilm carrier, to manufacture a biofilm configured to spirally wrap a PVC Silica carrier for optimum efficiency (Patent application 10-2007-0044157) In addition, a DN-SFBNR having an activated denitrification biofilm formed on the carrier wall is installed after the anaerobic buffer, and an N-SFBNR attached with an activated nitrification biofilm is continuously removed to remove organic matter and nitrogen in the sewage introduced into the process. It relates to a processing device.

As described above, the advanced treatment device is a technology for ensuring the quality of sewage treatment and reuse as an advanced treatment device that does not require the secondary precipitation device, which is an essential device of the biological treatment device.

In general, among microbial treatment and purification methods, microbial purification is widely used as an economical and efficient method. Among them, the method of purifying sewage through microorganisms has a disadvantage in that the growth rate of nitrifying autotrophic microorganisms for nitrifying ammonia nitrogen to nitrate nitrogen is very low compared to heterotrophs that oxidize other organic substances. Therefore, a large amount of reaction time is required to stabilize the nitrification reaction, and it is difficult to maintain sufficient nitrification microorganism activation under the hydraulic residence time of 6 hours or less, and the nitrification efficiency is very low and thus it is difficult to apply to nitrogen removal treatment. For this reason, the nitrification process is more efficient than the attached growth microorganism process using the fixed microbial membrane with high concentration of nitrifying microorganism activity.

In addition, nitrate nitrogen produced during nitrification is a substance that causes cyanosis in infants, and there is a denitrification method in which an organic substance is treated with nitrogen gas in a denitrification reaction using heterogeneous microorganisms in which an organic substance is an energy source in anoxic state. In addition, this attached growth biofilm process has been used for several decades in sewage and industrial wastewater treatment. Organic materials, nitrogen and phosphorus to be treated are used for cell synthesis and maintenance by transferring and spreading materials into the adherent growth biofilm. It is pointed out that the biggest problem is to adjust the transmission smoothly. Adhesion growth biofilm system has better treatment ability of organic matter than suspended growth system, and when toxic substance enters the system, highly active microorganisms in the system adhere to the surface of the carrier and proliferate. There is an advantage that the treatment efficiency is not reduced. In the wastewater treatment system using the adhesion growth biofilm process, the thickness of active microorganisms attached to the carrier surface affects substrate removal ability, and the diffusion coefficient of contaminants into the biofilm is a major factor that determines the performance of the system. .

In the treatment of ammonia nitrogen, the active microorganism thickness is 124 μm and the active microorganism thickness for the nitrite nitrogen treatment is 130 μm, and the growth thickness and dissolved oxygen (DO) transfer of the active microorganisms required for the nitrification process are carried out. It is reported that it is not restricted. However, in the adherent growth biofilm system according to the prior art, due to excessive microbial growth on the surface of the carrier, anaerobicization of the inside of the biofilm is restricted, and the transfer of organic carbon sources for the growth of anaerobic microorganisms is often a problem of odor in the biofilm system. . In addition, in order to maintain an efficient process, aerobic biofilm systems must increase the diffusion of these materials into the biofilm as limiting factors in the transfer of COD and nutrients N and P expressed in dissolved oxygen and organic matter concentration into the biofilm. . However, in the existing biofilm system, there is no method to control the limiting factor for the material transfer diffusion, so that the advantage of the biofilm system is not available and the excess microorganisms are clustered by growing and attaching the microorganisms to the flowable plastic media inside the aeration reactor. As a result of the decrease in treatment efficiency and the increase of desorption microorganisms, expert management is required.

The biofilm system for denitrification can increase the efficiency of denitrification by maintaining the uniform microbial membrane by the return flow rate and adjusting the biofilm thickness to uniformly diffuse organic matter and nitrate nitrogen into the biofilm. Such a biofilm system is very effective in removing nitrogen because of the age of the microorganisms in the treatment system due to the grown microorganisms, but has a disadvantage in that the removal efficiency of phosphorus is lowered. In order to increase the efficiency of phosphorus removal, by removing microorganisms detached from the biofilm system periodically, the phosphorus used for microbial cell synthesis can be prevented from being eluted in the treated water, thereby increasing phosphorus removal efficiency. The treatment water advanced by the spiral biofilm system attached to heterotrophic denitrifying bacteria and autotrophic nitrate bacteria as described above not only satisfies the legal effluent water quality, but also has very low concentrations of organic matter and suspended solids in the effluent, so that the water quality can be reused. It is a technology that can be secured.

In the present invention, the wastewater is purified, anaerobic buffer tank, anoxic heterotrophic denitrification spiral biofilm reactor and aerobic autotrophic nitrate spiral biofilm reactor in order to purify the nitrate nitrogen (produced in the nitrate spiral biofilm reactor) It is intended to provide an advanced wastewater treatment system that can re-define nitrification by returning NO ₃ ^-- N) to 1-4 times the flow rate of influent.

According to an aspect of the present invention, there is provided a purification apparatus for purifying wastewater, comprising: an anaerobic buffer 10 having an inflow passage 11, an outlet 12, and a sludge discharge port 13 of wastewater (inflow water); A carrier tube 21 surrounding the outer periphery, a cylindrical tube having an open top, a distribution tube 23 having a plurality of through holes 22 on its outer circumferential surface, and a sheet 24 spirally wound on the distribution tube 23. ) And a denitrification tank (28) containing a carrier (27) having a biofilm (26) having denitrifying bacteria (25) attached to both left and right sides of the sheet (24), and the wastewater jetted into the cross section between the carriers (27). Anoxic heterotrophic denitrification spiral biofilm reactor (20) consisting of; A carrier tube 31 surrounding the outer periphery, a cylindrical tube having an open top, a distribution tube 33 having a plurality of through holes 32 on its outer circumferential surface, and a sheet 34 spirally wound on the distribution tube 33. ) And a carrier (37) having a biofilm (36) having nitrifying bacteria (35) attached to both left and right sides of the sheet (34), and a nitrification tank (38) containing wastewater ejected from the cross section between the carrier (37). Aerobic autotrophic nitric oxide spiral biofilm reactor (30) consisting of; A communication tube 40 communicating the anaerobic buffer 10 and the denitrification tank 28, the denitrification tank 28 and the nitrification tank 38; The rotary pump 51 and the engine unit connecting the upper portions of the carrier cylinders 21 and 31 and the denitrification tank 28 and the nitrification tank 38 of the denitrification spiral biofilm reaction tank 20 and the nitric oxide spiral biofilm reaction tank 30. 50); A conveying line 60 connecting the nitrification tank 38 and the incidence passage 11 of the anaerobic buffer 10; A pump 71 for injecting the debris of the biofilm desorbed into the lower ends of the carrier cylinders 21 and 31 of the denitrification spiral biofilm reaction tank 20 and the nitric oxide spiral biofilm reaction tank 30 into the anaerobic buffer 10; Recirculation line 70; A discharge line 80 connected to the nitrification tank 38; Combined wastewater is an advanced wastewater treatment system that is purified through anaerobic buffer (10), anaerobic heterotrophic denitrification spiral biofilm reactor (20) and aerobic autotrophic nitrate spiral biofilm reactor (30).

According to the present invention, the flow rate between the biofilms 26 and 36 is 3-15 cm / sec, and the aspirato 55 is bound to the engine 50 of the nitrification tank 38. It is an advanced wastewater treatment system that supplies wastewater with air in the air.

As described above, the present invention constitutes a very simple system, the effect of which is useful to provide a surprising high-purity device.

In addition, the present invention is a process of maintaining the long-term microorganism retention time in the spiral biofilm reactor, the nitrification or denitrification microorganisms sufficiently attached to the sheet to control the flow rate to cause nitrification while ammonia nitrogen diffuses into the biofilm in the nitridation spiral biofilm. In a helical biofilm system, nitrate nitrogen and organics are purified by diffusion as they diffuse into the biofilm, and the present invention is used to shorten the hydraulic residence time and to reduce the reactor volume and achieve the purpose of treating organic matter and suspended solids. By improving access to the existing activated sludge process or the improvement of the sewage treatment system, there is an effect of improving the process to remove nitrogen and phosphorus as well as organic matter, and to use the wastewater as a reused water of the treated water.

The present invention provides a purification apparatus for purifying wastewater, comprising: an anaerobic buffer 10 having an inflow passage 11, an outlet 12, and a sludge discharge port 13 of wastewater (influent water), and an outer carrier A cylinder 21, a cylindrical tube having an open top, a distribution tube 23 having a plurality of through holes 22 on its outer circumference, a sheet 24 spirally wound on the distribution tube 23, and the sheet Oxygen-free oxygen consisting of a carrier 27 having a biofilm 26 having denitrifying bacteria 25 attached to both left and right sides of the 24, and a denitrification tank 28 containing wastewater spouted at the lower end of the carrier 27. Heterotrophic denitrification spiral biofilm reaction tank 20, and the distribution tube 33 having a plurality of through-holes 32 on the outer circumferential surface of the carrier cylinder 31 and the cylindrical tube of the upper end is open and the outer tube Biofilm 36 having sheets 34 spirally wound on distribution pipe 33 and nitrifying bacteria 35 attached to the left and right sides of the sheet 34. At the bottom of the carrier 37, there is an aerobic autotrophic nitric oxide spiral biofilm reaction tank (30) consisting of a nitrification tank (38) for receiving the wastewater discharged after the denitrification reaction. In addition, the anaerobic buffer 10 and the denitrification tank 28, the denitrification tank 28 and the communication tube (40) in communication with the nitrification tank 38, the denitrification spiral biofilm reaction tank 20 and the nitrified spiral biofilm reaction tank (30) of the carrier cylinder (21, 31) and the denitrification tank 28, there is a rotary pump 51 and the engine (50) for connecting the nitrification tank 38, the nitrification tank 38 and anaerobic buffer There is a conveying line 60 connecting the incidence passage 11 of the bath 10. And a pump 71 for injecting the biofilm residues detached from the carrier surfaces 21 and 31 of the carrier cylinders 21 and 31 of the denitrification spiral biofilm reaction tank 20 and the nitric oxide spiral biofilm reaction tank 30 into the anaerobic buffer 10. And a recirculation line 70, and there is a discharge line 80 connected to the nitrification tank 38. Therefore, the combined wastewater is purified through an anaerobic buffer (10), an anaerobic heterotrophic denitrification spiral biofilm reactor (20), and aerobic autotrophic nitrate spiral biofilm reactor (30).

That is, as shown in Figure 1, the wastewater enters the anaerobic buffer through the entrance passage. Although not shown, the anaerobic buffer can be manufactured in such a way that it forms a immersion tank that physically treats sedimentary substances, such as sand, which is already known, and has a microscreen tank that removes contaminants in the wastewater passed through the immersion tank. have. The following briefly looks at the state in which the waste water is purified by the present invention. First, the wastewater enters the inside of the anaerobic buffer after passing through the incident passage of FIG. 1. After filtering the impurities in the form of filtration through the anaerobic buffer, it enters into the denitrification tank of the next denitrification spiral biofilm reaction tank through the illustrated communication tube. The inside of this denitrification tank is provided with a carrier as shown. Therefore, the wastewater incident on the denitrification tank enters the upper portion of the carrier cylinder through the pumping force of the rotary pump. At this time, the wastewater introduced into the carrier is to separate the nitrate nitrogen by the denitrification reaction with nitrogen gas through the denitrification bacteria formed therein. The carrier used herein is a microporous adherent growth of the PVC silica mixed porous carrier.

Then, the biofilm carrier used in the present invention will be described in detail with reference to FIGS. 2 and 3. That is, the carriers 27 and 37 of the biofilms 26 and 36 of the carrier cylinders 21 and 31 are cylindrical tubes with open tops, and have distribution pipes having a plurality of through holes 22 and 32 on the outer circumferential surface thereof. There are (23, 33), and there is a biofilm (26) made of denitrification bacteria (25) attached to both left and right sides of the sheets (24, 34) spirally wound on the distribution tubes (23, 33). Therefore, the spacing between the spiral wound biofilm 26 is made of 2-20mm.

In other words, the carriers 27 and 37 of the present invention refer to a state in which the distribution pipes 23 and 33 and the biofilms 26 and 36 are combined, and the biofilms 26 and 36 are sheets 24 and 34. The denitrification bacterium 25 is attached to (), and the state in which the biofilms 26 and 36 are wound in a spiral shape on the outer circumferential surfaces of the cylindrical distribution pipes 23 and 33. At this time, the distribution pipe (23, 33) is cylindrical, and has a plurality of through holes (22, 32) around the outer circumferential surface, the upper end is maintained through the hole through the upper end It is to supply waste water uniformly. And the biofilms 26 and 36 which wrap the distribution pipes 23 and 33 maintain the space | interval, It is preferable that the space | interval maintains the width | variety of 2-20 mm as shown. Therefore, while contacting the denitrification bacteria (25) while separating the waste water and the rotation at this interval width to separate the nitric acid.

On the other hand, the flow rate flowing between the gap between the biofilm 26, 36 is preferably 3-15cm / sec.

Then look at the manufacturing form of the distribution pipe 14 and the carriers 27, 37 of the present invention. The sheets 24 and 34 of the spiral fixed biofilm according to the present invention are 1 mm thick PVC / Silica sheets. The porous membrane (sheet) is preferably a double-sided tape having a width of 5-10 mm and a height of 5 mm, which is spirally rolled up and down around the distribution pipes 23 and 33, and is completely sealed using epoxy in the upper and lower fixing frames. Roll up into a spiral biofilm system. At this time, the width and length ratio of the biofilm 26 and 36 is 1: 7-30 and the width of the biofilm carrier should not exceed 1m. That is, if the length of the distribution pipes 23 and 33 is 1, the length of the biofilms 26 and 36 wound around the distribution pipes 23 and 33 is about 7-30. Of course, more precisely, since the distribution pipes 23 and 33 are somewhat longer than the widths of the biofilms 26 and 36, it is preferable to wind them in a ratio of 1: 7. On the other hand, through the spiral cross-section (waterway) structure formed of the PVC / silica porous sheet of the present invention circulation to maintain the internal flow rate between the biofilm 26, 36 at 3-15 cm / sec (preferably 5-7 cm / sec) The pump flow rate is adjusted to maintain a biofilm of uniform thickness, and the detached biofilm is operated to prevent accumulation between the biofilms 26 and 36.

In any case, the wastewater introduced into the carrier of the denitrification spiral biofilm reaction tank of the present invention is purified and denitrated and then introduced into the nitrification tank of the following nitric oxide spiral biofilm reaction tank through the illustrated communication tube. At this time, the communication tube should be formed at a lower level than the communication tube of the mold buffer tank and the denitrification tank. The reason is that the water flows from high to low, preventing the wastewater from flowing back to the anaerobic buffer. The wastewater that has been passed to the nitrification tank is nitrified with the same carrier as that formed in the denitrification spiral biofilm reactor. Of course, there is one difference from the carrier formed in the denitrification spiral biofilm reactor, which is that the microorganisms shown are different from each other. Nitrifiers live in the carrier formed in the nitric oxide spiral biofilm reactor. It is not denitrifying bacteria. Therefore, the rotary pump formed in the nitric oxide spiral biofilm reaction tank nitrification tank of the present invention operates to inject waste water into the upper support pipe. Eventually, the nitrified wastewater passing through the carrier of the carrier tube is completely cleaned and discharged to the outside through the discharge line shown. However, the present invention forms a recirculation line and a pump in each of the carriers. That is, the recirculation line is connected to the carrier to communicate with the anaerobic buffer. This is a long time purifying action to collect sludge denitrification bacteria, nitrifiers and waste water residues separately through the anaerobic buffer to filter. In addition, a separate return line is formed to connect the nitrification tank of the nitrification spiral biofilm reaction tank and the incidence passage of the anaerobic buffer tank, which firstly passes through the denitrification spiral biofilm reaction tank to re-denitrify the wastewater and anaerobic buffer tank and denitrification spiral type. The biofilm reactor is passed through again to achieve more reliable purification.

In addition, the present invention preferably flow rate between the gap between the biofilm 26, 36 is 3-15cm / sec. This is because the results of measuring the effect of the purification through a number of experiments while performing the present invention showed the most excellent value. Of course, it is preferable to maintain the most preferably 5-7 cm / sec, in order to maintain this by adjusting the flow rate of the circulation pump to maintain a biofilm of uniform thickness, the operation to prevent the detached biofilm is accumulated between the biofilm () Good to do.

On the other hand, in the present invention, it is preferable that the aspirato 55 is supplied to the ash engine 50 of the nitrification tank 38 to supply wastewater together with air in the atmosphere. In other words, by installing the aspirator 55 is aimed at the rejecting effect. That is, in the present invention, after installing an asiprator (vacuum absorbing pipe; 55) in the gas pipe (50), a flowmeter is installed to maintain a proper flow rate flowing in the biofilm () interval and at the same time to inhale air in the air and dissolve it in an aqueous solution. As a result, the DO concentration in the reactor system was maintained at 3 mg / l or more to increase the efficiency in aerobic biological treatment. This asipiration system eliminates the aeration system in the reactor from existing aerobic biological treatments, reducing the design and operating costs for power and equipment required for air supply. In other words, when the waste water is supplied to the inside of the recycle tube through the pumping force of the rotary pump, the outside air is naturally supplied to the inside of the purification apparatus by the degree of vacuum generated.

The basic theory of the present invention will now be described. The present invention forms an anaerobic buffer having a sedimentation tank for physically treating sedimentary substances such as sand, and a fine screen tank for removing contaminants in the wastewater passed through the sedimentation tank, that is, two stages of denitrification spiral biofilm reaction tank and nitridation spiral type. Some of the wastewater from the biofilm reactor can be returned and the first source of wastewater can be introduced into the anaerobic buffer. It consists of anaerobic buffer, anoxic heterotrophic denitrified spiral biofilm reactor, and aerobic autotrophic nitrified spiral biofilm reactor to maintain DO concentration below 0.5 mg / l before entering the denitrification spiral biofilm reactor in the anaerobic buffer tank. It is.

Anaerobic buffer tank is an oxygen-free heterotrophic denitrification spiral by reducing DO concentration to 0.5 mg / l or less in an anaerobic buffer tank mixed with the flow of nitrate nitrogen produced by nitrifying ammonia nitrogen in the nitrification biofilm reactor and the flow rate from the flow control tank. NO ₃ ^-- N is converted to N ₂ gas in the biofilm reactor to remove nitrate nitrogen, and ammonia nitrogen (NH ₄ ⁺ -N) in the influent is treated by an oxynitride microorganism through an anoxic denitrification spiral biofilm reactor. Is treated in an aerobic autotrophic nitrate spiral biofilm reactor and is released as NO ₃ ^-- N. Microorganisms detached from the biofilm at the bottom of the denitrified spiral biofilm reactor and the nitrified helical biofilm reactor equipped with spiral biofilm are discharged by the intake discharge pump. It is converted into and supplied to the organic carbon source deficient in the denitrification spiral biofilm reactor to induce a smooth denitrification reaction.

That is, the present invention is manufactured in a basic configuration of a spiral biofilm reaction system, such as the previously filed (Application No. 10-2007-0044157), by using it is composed of a high-treatment device for the removal of organic matter and nitrogen in the waste water.

Referring to Figure 1 in detail, the hydraulic retention time for the total volume of the anaerobic buffer, denitrified spiral biofilm reactor, nitrified spiral biofilm reactor in Figure 1 by adjusting the flow rate of the constant influent in the flow tank is 4 to 8 hours anaerobic The buffer microorganisms were operated for 0.5 to 1.0 hours, denitrified spiral biofilm reactors for 1.5 to 3.5 hours, and nitrified helical biofilm reactors for 2 to 3.5 hours. Is periodically discharged according to the total phosphorus (TP) concentration in the treated water and introduced to the bottom of the anaerobic buffer. The desorption microorganism introduced at the bottom of the anaerobic buffer maintains sludge digestion in the long-term stay and anaerobic state, lowers the DO concentration to 0.5 mg / l or less, and releases the phosphorus (PO ₄ ^-3 -P) needed for the advanced processing equipment. Nitrate nitrogen (NO ₃ ^-- N) produced in nitrate spiral biofilm reactors by eluting the digested sludge into influent and simultaneously increasing the concentration of soluble organics into the denitrification spiral biofilm reactor to maximize denitrification by heterotrophic microorganisms. Is removed with nitrogen gas (N ² ). When the elution of orthophosphorus by sludge introduced into the anaerobic buffer is higher than the concentration required for denitrification and nitrification, the sludge concentrated in the lower part of the anaerobic buffer is intermittently disposed of in the sludge storage tank. In the oxygen-free denitrification spiral biofilm reactor, organic substances and nitrate nitrogen are treated, and the desorbed microorganisms are periodically returned and discarded, thereby reducing the iodine released from the sludge.

1 is a system diagram showing a purification apparatus of the present invention,

2 is a view showing a state of the distribution pipe of the present invention,

3 is a view showing a carrier of the present invention,

4 is a perspective view showing the carrier of the present invention as a whole;

5 is a view showing the nitrification process in the present invention.

<Brief description of the major symbols in the drawing shown>

10; Anaerobic buffer 11; Passage

12; Outlet 20; Denitrification Spiral Biofilm Reactor

21, 31; Tin barrel 22, 32; Through hole

23, 33; Distribution tubes 24, 34; Sheet

25; Denitrifying bacteria 35; Nitrifying bacteria

26, 36; Biofilm 27, 37; carrier

28; Denitrification tank 38; Nitrifier

40; Communication tube 50; Association

51; Rotary pump 60; Return line

70; Session line 71; Pump

80; Discharge line

Claims (3)

In the purification device which purifies waste water, An anaerobic buffer 10 having an inlet passage 11, an outlet 12, and a sludge outlet 13 of the wastewater (inflow water); A carrier tube 21 surrounding the outer periphery, a cylindrical tube having an open top, a distribution tube 23 having a plurality of through holes 22 on its outer circumferential surface, and a sheet 24 spirally wound on the distribution tube 23. ) And a carrier 27 having a biofilm 26 having denitrifying bacteria 25 attached to both left and right sides of the sheet 24, and a denitrification tank 28 containing wastewater spouted at the lower end of the carrier 27. Anoxic heterotrophic denitrification spiral biofilm reactor (20) consisting of; A carrier tube 31 surrounding the outer periphery, a cylindrical tube having an open top, a distribution tube 33 having a plurality of through holes 32 on its outer circumferential surface, and a sheet 34 spirally wound on the distribution tube 33. ) And a carrier (37) having a biofilm (36) having nitrifying bacteria (35) attached to both left and right sides of the sheet (34), and a nitrification tank (38) containing wastewater jetted at the lower end of the carrier (37). Aerobic autotrophic nitric oxide spiral biofilm reactor (30) consisting of; A communication tube 40 communicating the anaerobic buffer 10 and the denitrification tank 28, the denitrification tank 28 and the nitrification tank 38; The rotary pump 51 and the engine unit connecting the upper portions of the carrier cylinders 21 and 31 and the denitrification tank 28 and the nitrification tank 38 of the denitrification spiral biofilm reaction tank 20 and the nitric oxide spiral biofilm reaction tank 30. 50); A conveying line 60 connecting the nitrification tank 38 and the incidence passage 11 of the anaerobic buffer 10; The pump 71 and the recirculation line 70 for injecting the debris in the carrier cylinders 21 and 31 of the denitrification spiral biofilm reaction tank 20 and the nitrification spiral biofilm reaction tank 30 into the anaerobic buffer 10. and; A discharge line 80 connected to the nitrification tank 38; Combined wastewater is an advanced anaerobic buffer (10), oxygen-free heterotrophic denitrification spiral biofilm reaction tank (20) and aerobic autotrophic nitrate spiral biofilm reaction tank (30) characterized in that the purified wastewater treatment device. The method of claim 1, Flow rate of wastewater, characterized in that the flow rate between the gap between the biofilm (26, 36) is 3-15cm / sec. The method of claim 1, In the engine 50 of the nitrification tank 38, Aspirato (55) by combining the wastewater advanced treatment apparatus, characterized in that for supplying wastewater with air in the atmosphere.

Images