KR20050014407A - Apparatus and Method of treating nitrogen and phosphorus of sewage and Operating Method of the apparatus - Google Patents

Abstract

PURPOSE: To provide an apparatus and a method for treating nitrogen and phosphorous of sewage, which are able to biologically denitrify and dephosphorize the sewage through an air floatation tank integrally formed with a bioreactor, and a method for operating the apparatus. CONSTITUTION: The apparatus comprises a flow equalization tank (300) to control flow of raw water flown-in from the outside, an anoxic tank (301) which treats the flow-controlled raw water through the flow equalization tank to be an anoxic state, an air floatation tank integrally formed with a bioreactor (302) which treats the raw water gone through the anoxic tank, an aeration tank (303) which aerates the water treated by the air floatation tank integrally formed with the bioreactor, and a final settling tank (304) which settles the aerated treated water through the aeration tank. A sludge storage tank (305) is connected to the air floatation tank integrally formed with the bioreactor to treat the sludge floated from the air floatation tank integrally formed with the bioreactor. The sludge is dehydrated through a dehydrator (306) to discharge the sludge through a sludge hopper (307).

Description

Apparatus and Method of treating nitrogen and phosphorus of sewage and Operating Method of the apparatus

The present invention is nitrogen contained in high concentration organic wastewater wastewater. By applying bioadsorption and bioreactor integrated pressure floating method to treat phosphorus in an optimized state, a stable nitrogen and phosphorus treatment process is derived to promote a clean environment and a comfortable hydrophilic environment.

Recently, the increase of population, urban concentration, and rapid development of industry intensify environmental pollution, which deteriorates or damages the water quality. Furthermore, nutrients such as nitrogen and phosphorus are introduced into the water resources such as rivers and lakes. The depletion of dissolved oxygen in the water caused by the rapid increase of algae caused by eutrophication caused a rapid increase in the value of water resources and water treatment costs due to the death of fish and shellfish, destruction of the aquatic ecosystem, deterioration of taste by algae, and odor generation. .

In order to improve the problems caused by water pollution, various nitrogen and phosphorus removal systems have been researched and developed and accumulated in practical technologies to remove nitrogen and phosphorus, which are the causes of eutrophication, in sewage and wastewater treatment.

Known biological nitrogen phosphorus processes are independent of dissolved oxygen concentration and organic matter in water, and how to properly treat these different independent treatment processes is the main task of nitrogen phosphorus treatment process.

Apparatus related to the biological nitrogen, phosphorus treatment currently applied or in use is shown in the schematic diagram of Figure 1, the basic treatment principle is as follows.

Facility for treating nitrogen and phosphorus contained in the raw water, which is organic sewage and waste water is a flow control tank 10 for adjusting the flow rate as shown in Figure 1, and the first settling of the raw water through the flow control tank (10) An anaerobic tank 30 for reprocessing the raw water via the first settling tank 20, the first settling tank 20, an anoxic tank 40 for reprocessing the raw water passing through the anaerobic tank 30, An aeration tank 50 for aeration of the raw water treated through the oxygen-free tank 40 and a second precipitation tank 60 for precipitating the raw water in a state in which sufficient oxygen is supplied to the raw water through the aeration tank 50. In addition, the surplus treated water treated through the second settling tank 60 in the course of raw water is returned to the anaerobic tank 30, or as a peripheral device, the raw water is treated through the second settling tank 60 for treatment. To a concentration tank 70 for discharging water or collecting and treating treated water, a sludge storage tank 80 for collecting raw sludge contained in the raw water recovered from the first sedimentation tank 20, and the sludge storage tank 80. A dewatering machine (90) for dewatering the recovered sludge and a sludge hopper (91) for storing the dewatered sludge through the dehydrator (90), the system for carrying out the sludge recovered from the sludge hopper 91 in the cake state Is done.

Denitrification and dephosphorization by the denitrification and dephosphorization apparatus (A ₂ O process) for biological nitrogen and phosphorus treatment divided into the flow chart shown in FIG. 1 is a flow rate adjustment for introducing raw water into the flow regulating tank 10 as shown in FIG. Process (S101), and the first settling process (S102) for initially settling the raw water passed through the flow adjustment tank 10 through the first settling tank (20), and the sludge is included in the raw water after the initial settling (S103) ), The sludge is sent to the sludge storage tank 80, the sludge treatment process for storing the sludge (S104), the process of dewatering the stored sludge through the dehydrator (S105), the dewatered sludge sludge hopper (91) Anaerobic treatment process (S107) and the anaerobic treatment process (S107) to anaerobic the raw water undergoing the initial settling process in the anaerobic tank 30 through the anaerobic process through (S106). Destroy the enemies by passing over 40 And an internal circulation process (S109) of repeatedly treating the raw water by internally circulating the raw water during the anaerobic treatment process (S108) and the anaerobic treatment process (S107) and the anaerobic treatment process (S108), The aeration process (S110) for forcibly aeration of raw water through the aerobic treatment process (S108) through the aeration tank (50) and supplying a large amount of oxygen to the raw water, and the second precipitated tank (60) for the raw water undergoing the aeration process. The final sedimentation process (S111) to finally settle through and the end of the final sedimentation process (S111) to the end of the treated water discharge process (S112) discharged into the treated water, or there is surplus water in the final sedimentation process (S111) In case (S113), it is returned to the anaerobic treatment process (S107) or reprocessed, or the treated water is concentrated (S114) and sent to the sludge water treatment process (S104) to be carried out as a cake.

1 and 2 in the apparatus for biological nitrogen. Phosphorus treatment (denitrification. Dephosphorization) and the treatment method A ₂ O method, biological removal is due to the phenomenon of luxury uptake of microorganisms.

Normally, microorganisms consume phosphorus as a nutrient for biosynthesis in the body while BOD is consumed, while Phosphate Accumulating Organisms (PAO) release phosphorus in the anaerobac-Aerobic process. And ingestion phenomenon. In detail, in the anaerobic state, low molecular weight substances are accumulated in cells in the form of PHB (Poly-β-hydroxybutyrate) by biological dephosphorus microorganisms (Acinetobactor, Pseudomonas, Aeromomas), and orthophosphates (PO4-P) are released outside the cell. The dephosphorized microorganism which discharged phosphorus again ingests phosphorus excessively while oxidatively decomposing organic substance and accumulated PHB in an aerobic state, and the phosphorus removal process is completed by suitably removing the microorganism which ingested excess phosphorus. At this time, in order to ingest the phosphorus excessively, the phosphorus release (Phosphorus Release) should be proceeded first. If phosphorus release other than an electron acceptor, that is, a material such as NO ₃ -N, the phosphorus release is interrupted This prevents efficient phosphorus release from the mold.

In the treatment of nitrogen (denitrification), in general, the types of nitrogen upon inflow of sewage water are organic nitrogen (organic-N) and ammonia nitrogen (NH ₄ + -N), which are obtained through nitrification in an aerobic activated sludge aeration tank. It is changed to nitrate nitrogen (NO ₃ -N), and the reaction tank of the next step is maintained in anoxic state (Anoxic) to reduce the nitrate nitrogen (NO ₃ -N) to nitrogen gas.

In other words, the process of removing these nitrogen components from the wastewater and wastewater includes a nitrification process for changing ammonia and organic nitrogen in the influent from aerobic conditions to nitrate and biological reduction of nitrate nitrate produced by the nitrification process under anoxic conditions. It is divided into two-stage process in which the denitrification process which converts to nitrogen gas by the action is reduced to nitrogen gas.

The biological nitrogen and phosphorus treatment apparatus and method put to practical use using such a basic treatment principle are based on temporally listing the A ₂ / O series and anaerobic and aerobic conditions as shown in FIGS. 1 and 2 spatially listing anaerobic and aerobic conditions. It can be divided into the method of sequenicing batch reactor (SBR) series as shown in Figs.

A typical anaerobic and aerobic treatment is the A / O process as described above, followed by the A ₂ / O process with the addition of a nitrogen removal process. In addition, there are technologies (UCT, VIP) induced by changes in the internal circulation stage improved in this A ₂ / O process, and also the phosphorus removal process was added in the four-stage bardenpho process developed as the nitrogen removal process. This includes the five-stage Waden process. In other words, the A ₂ / O series uses a process that intentionally induces nitrification, deoxidation and excessive absorption of phosphorus through the anaerobic and aerobic circulation. In addition, various processes have been developed.

Figure 3 is a simplified schematic diagram for explaining the SBR method for the treatment of a general biological nitrogen, phosphorus, SBR series that performs nitrification, denitrification, dephosphorization, organic matter removal in one such reactor, the release of phosphorus and denitrification reaction by introducing raw water Initial mixed-flow step (S201) of mixing the raw water in order to induce the reaction and reaction-induced reaction to induce the phosphorus discharge and denitrification reaction of the raw water that has undergone the mixed-flow step of the raw water (React- Fill) step (S202), the reaction step (S203) and the reaction step (S203) to induce excessive intake of phosphorus nitrification phosphorus removal and BOD contained in the raw water passed through the reaction-flow step (S202) and the reaction step (S203) A settle step (S204) for solid-liquid separation of coarse raw water, and a discharge-rest (Idle) step for discharging raw water treated through the settling step (S204) to discharge or sludge treatment (Decant-Sludge Waste). Denitrification and dephosphorization of raw water with (S205) Furthermore, various SBR methods and technologies have been developed for the control of the aeration device by measuring dissolved oxygen, the construction of another reactor in the inlet section, the return of sediment sludge, and the separation of supernatant at the discharge stage. .

However, the A ₂ / O series has a separate anaerobic, anaerobic, and aerobic process in a single-stage or multi-stage reactor, which complicates the operation of the system, and is dependent on the high concentration of dissolved organic matter or the influx of floating unique substances. Due to abnormal growth of nutrient microorganisms and micro suspended solids, sludge sedimentation of aerobic tank is lowered, and it reacts sensitively to nitrogen and organic material load, which inhibits nitrification reaction and sludge is lost through sedimentation tank. The construction and operation management costs of management and sludge treatment are excessively increased.

In addition, the SBR process for the simultaneous simultaneous removal of nitrogen and phosphorus requires a long solids residence time (SRT) for nitrogen because of nitrification processes and short solids for phosphorus removal as it relies on the removal of excess intake of excess sludge. The residence time is suitable. Therefore, it is difficult to carry out the nitrogen phosphorus treatment method in one treatment process.

In other words, anaerobic tank, anaerobic tank and aerobic tank should be separately configured to remove nitrogen and phosphorus from waste water under high organic concentration. Also, if high concentration of dissolved organic substance or large amount of floating solid substance is introduced, abnormal growth of heterotrophic microorganism and Due to the fine suspended matter, the sludge settling property of the aerobic tank is lowered, and the nitrification reaction is suppressed by reacting sensitively to nitrogen and organic material loads and sludge is lost through the settling tank.

In addition, the biosorption tank is difficult to separate the sludge solids as a settling tank because the sludge sedimentation rate is slow after the biosorption because the microorganism adsorbs the organic material within a short residence time (20-60 minutes). As a result, an increase in the load of suspended solids in the nitrifier causes the nitrification inhibition of the nitrifying bacteria.

In addition, in the operation of the flow regulating tank filled with contact media, the conventional flow regulating tank was unable to construct various microorganisms according to the water level and air contact because the main functions of the flow regulating tank and the water quality bacteria were the main functions. By operating in the five-step operation mode described above to achieve anoxic conditions, there was a complex operational problem.

Accordingly, it is an object of the present invention to provide a method for treating nitrogen and phosphorus by a new biosorption and bioreactor integrated pressure flotation tank that can replace the problems of biological denitrification and dephosphorization by A ₂ O method and SBR method. .

Another object of the present invention is to simplify the operation of the system for separately performing anaerobic, anaerobic, and aerobic processes in a single series or a multi-stage reactor in biological denitrification and dephosphorization treatment.

Another object of the present invention is to reduce the sludge sedimentation of the aerobic tank due to abnormal proliferation of heterotrophic microorganisms and micro suspended solids in the case of high dissolved organic substance concentration or large amount of suspended unique substances in biological denitrification and dephosphorization treatment. To prevent it.

Another object of the present invention is to reduce the nitrification reaction by reacting sensitively to nitrogen and organic load in biological denitrification and dephosphorization and to reduce sludge loss through the settling tank, while at the same time efficient operation and management without skilled workers. It is possible to manage and reduce the construction cost of sludge treatment and excessive investment cost of operation management.

Another object of the present invention is a prerequisite to be solved for the simultaneous simultaneous removal of nitrogen and phosphorus contained in raw water, that is, the problem of requiring as long a solid residence time as possible due to the nitrification process with respect to nitrogen, and excessive intake for phosphorus removal. Since it is dependent on the removal of the excess sludge, it is possible to perform the unbalance problem in residence time requiring a short solid residence time in a single treatment process.

Nitrogen phosphorus treatment apparatus for organic sewage and wastewater according to the present invention for achieving this object,

A flow control tank for adjusting the raw water flow rate, a settling tank for precipitating the raw water through the flow control, an anaerobic tank for reprocessing the raw water through the settling tank, an anoxic tank for reprocessing raw water passing through the anaerobic tank, Aeration tank for aeration of raw water treated through anoxic tank, sedimentation tank for precipitating raw water while supplying sufficient oxygen to raw water through the aeration tank, and returning the surplus treated water treated through the sedimentation tank to anaerobic tank, or recovered raw water from sedimentation tank In the sludge storage tank for collecting raw sludge contained in the organic sewage, wastewater nitrogen, which is provided with a sludge hopper for storing the sludge dewatered through the dehydrator, the dehydrator for dewatering the sludge recovered in the sludge reservoir tank. ,

A flow rate adjusting tank for adjusting the flow rate of raw water introduced from the outside;

An oxygen-free tank for treating raw water whose flow rate is adjusted through the flow rate adjusting tank in an oxygen-free state;

A bioreactor integrated pressure floatation separation tank for treating raw water that has undergone the anoxic tank,

An aeration tank for aeration of the treated water passing through the bioreactor integrated pressure floatation separation tank;

Consists of the final sedimentation tank to precipitate the treated water aerated through the aeration tank,

In order to process the sludge floating from the bioreactor integrated pressure flotation separation tank, the slurry storage tank is connected to the bioreactor integrated pressure flotation separation tank side, and dehydrated through a dehydrator to transport the sludge into the cake state.

Another feature of the present invention, the flow control tank for adjusting the raw water flow rate, the settling tank for precipitating the raw water through the flow control, the anaerobic tank for reprocessing the raw water through the settling tank, the raw water passing through the anaerobic tank Anaerobic tank for reprocessing, aeration tank for aeration of raw water treated through anoxic tank, a precipitation tank for precipitating raw water while supplying sufficient oxygen to the raw water through the aeration tank, and the surplus treated water treated through the precipitation tank to be returned to anaerobic tank Or an organic sludge storage tank comprising a sludge storage tank for collecting fresh sludge contained in the raw water recovered from the sedimentation tank, a dehydrator for dewatering the sludge recovered in the sludge storage tank, and a sludge hopper for storing the sludge finished dehydration through the dehydrator. In the nitrogen-phosphorus treatment apparatus,

A flow rate adjusting tank for adjusting the flow rate of raw water introduced from the outside;

A bioreactor integrated pressure floatation separation tank for processing raw water whose flow rate is adjusted through the flow rate adjusting tank,

An aeration tank for aeration of the treated water passing through the bioreactor integrated pressure floatation separation tank;

Consists of the final sedimentation tank to precipitate the treated water aerated through the aeration tank,

In order to process the sludge floating from the bioreactor integrated pressure flotation separation tank, the slurry storage tank is connected to the bioreactor integrated pressure flotation separation tank side, and dehydrated through a dehydrator to transport the sludge into the cake state.

Another feature of the present invention, the flow adjustment process for introducing the raw water into the flow adjustment tank, the first settling process for the first settling of the raw water through the settling tank through the settling tank, the anaerobic process for anaerobic raw water through the first settling process in the anaerobic tank, An anoxic treatment process for treating the raw water in an anaerobic state by passing the raw water through the anaerobic process through an anaerobic tank, and an internal circulation process for repeatedly treating the raw water by internally circulating the raw water during the anaerobic treatment and anoxic treatment. And an aeration process for aeration of the raw water that has undergone the anoxic treatment process through an aeration tank, a final sedimentation process for finally settling the raw water that has undergone the aeration process through a settling tank, and a sludge discharge process for dewatering sludge and taking it out to a cake. In the biological denitrification, dephosphorization treatment method,

Nitrogen phosphorus treatment method by the biosorption and bioreactor integrated pressure floating tank,

1 step of adjusting the flow rate of the raw water through the flow adjustment tank;

2 steps of processing the raw water by adjusting the flow rate of the raw water sent to the anaerobic tank,

Comprising the anoxic treatment of the raw water through the above steps and the three steps of processing by adding the anoxic raw water to the bioreactor integrated pressure flotation separation tank,

4 steps of aeration of the raw water processed through the step,

Characterized in that the five steps to precipitate the raw water aerated through the four steps.

Another feature of the present invention is a flow control tank operation step beginning with the first stage of the initial mixing-inflow of mixing the raw water to induce the phosphorus discharge and denitrification reaction by introducing the raw water, and the raw-water mixing-inflow step 2 steps of the reaction-inflow step of reacting to induce phosphorus release and denitrification of raw water, 3 steps of the reaction step of inducing excessive intake of phosphorus and nitrification reaction of phosphorus nitrification, which have undergone the reaction-inflow step The organic ha consisting of four steps of the precipitation step of solid-liquid separation of the raw water passed through the step, and the discharge-resting step of discharging the raw water treated through the precipitation step or discharge-sludge treatment to denitrate and dephosphorize the raw water. In the biological denitrification and dephosphorization treatment method of wastewater,

Filling the contact medium in the first step of the flow adjustment tank operation step starting with the mixing-inflow step, the mixing-inflow step of the mixing-inflow, reaction-inflow, reaction, precipitation, discharge-pause satisfy the oxygen-free condition in one step operation mode and a high concentration from the NO ₃ -N and NO x removal is contained in the oxygen-free condition can be conveyed in the treated water and the NO ₃ -N cyclic process with sludge as denitrification and production of organic adsorption and Characterized by removing organic matter from the wastewater.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a denitrification / dephosphorization apparatus for a general wastewater wastewater nitrogen.phosphorus treatment.

Figure 2 is a flow chart of the nitrogen, phosphorus treatment method by a conventional wastewater nitrogen.phosphorus treatment apparatus.

Figure 3 is a reference diagram for explaining the operational characteristics of the conventional wastewater nitrogen.phosphorus treatment apparatus.

4 is a biological biosorbent denitrification according to an embodiment of the present invention. A system diagram for explaining the dephosphorization apparatus and its method, and the system diagram according to the separate structure of the flow regulating tank and the anoxic tank.

5 is a system diagram for explaining a biological denitrification and dephosphorization apparatus configuration and method according to another embodiment of the present invention, a system diagram according to a flow control tank and an anaerobic tank integrated structure

6 shows a bioreactor integrated pressurized floatation tank configured for biological biosorption denitrification and dephosphorization of sewage and wastewater according to an embodiment of the present invention, (a) is an overall configuration schematic diagram, and (b) is a plan schematic diagram thereof.

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

300: flow rate adjusting tank 301: anoxic tank

302: bioreactor integrated pressure flotation separation tank 303: aeration tank

304: Sedimentation tank 305 sludge storage tank

306: dehydrator 307: sludge hopper

400: raw water supply pipe 401: cylinder

402: stirring blade 403: shaft

404: cyclone reducer 405: drive unit

406: skimmer 407: pressure float separation tank

408: bioreactor 409: slope

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 4 is a biological biosorbent denitrification according to an embodiment of the present invention. The schematic diagram for demonstrating a dephosphorization apparatus structure and its method is shown, and the schematic diagram of the separate structure of a flow regulating tank and an anoxic tank is shown. FIG. 5 is a system diagram for explaining a biological denitrification / dephosphorization apparatus configuration and a method thereof according to another embodiment of the present invention, and shows a system diagram of a flow control tank and an anaerobic tank integrated structure. FIG. 6 shows a bioreactor integrated pressure floatation tank configured for biological biosorption denitrification and dephosphorization of sewage and wastewater according to an embodiment of the present invention, (a) is an overall configuration schematic, and (b) is a plan schematic view thereof to be.

The basic components of the organic wastewater wastewater nitrogen treatment system are listed.The flow control tank controls the flow rate of the raw water supplied, the settling tank which precipitates the flow-controlled raw water, and the reprocessing of the raw water through the settling tank. Anaerobic tank, anaerobic tank for reprocessing raw water passing through the anaerobic tank, aeration tank for aeration of raw water processed through anoxic tank, and a precipitation tank for precipitating raw water in the state of supplying sufficient oxygen to the raw water through the aeration tank, the precipitation tank Sludge storage tank to return the surplus treated water treated through the anaerobic tank, or to collect the raw sludge contained in the raw water recovered from the sedimentation tank, dehydrator for dewatering the sludge recovered in the sludge storage tank, sludge finished dehydration through the dehydrator A sludge hopper for storing is provided.

The type of biological biosorption denitrification and dephosphorization apparatus according to the present invention may be configured as shown in FIGS. 4 and 5.

That is, as shown in FIG. 4, the flow rate adjusting tank 300 for adjusting the flow rate of raw water introduced from the outside, the anoxic tank 301 for treating the raw water whose flow rate is adjusted through the flow rate adjusting tank 300 in an anoxic state, and the anoxic tank 301. Bioreactor integrated pressurized floatation tank 302 for treating raw water having passed through), aeration tank 303 for aeration of the treated water passed through the bioreactor integrated pressure floatation separation tank 302, and aerated through the aeration tank 303 It consists of a final settling tank 304 for precipitating the treated water, the slurry storage tank on the side of the bioreactor integrated pressure buoyancy separation tank 302 to treat the sludge floating from the bioreactor integrated pressure buoyancy separation tank 302 305 is connected and dewatered through the dehydrator 306 to take the sludge out through the sludge hopper 307 into the cake state.

In addition, as shown in Figure 5, the flow control tank 300 for adjusting the flow rate of the raw water flowing from the outside, the bioreactor integrated pressure buoyancy separation tank 302 for processing the raw water whose flow rate is adjusted through the flow adjustment tank 300, bioreactor It consists of an aeration tank 303 for aeration of the treated water passed through the integral pressure flotation separation tank 302, and a final precipitation tank 304 for depositing the aerated water through the aeration tank 303, where the bioreactor integrated pressure floatation separation is performed. The sludge storage tank 305 is connected to the bioreactor integrated pressure flotation separation tank 302 side in order to treat the sludge floating from the tank 302 and dewatered through the dehydrator 306 to carry out the sludge through the sludge hopper 307. And to be taken out as a cake.

As the embodiment of the present invention as shown in Figures 4 and 5 biological biosorption desorption of the waste water represented by the denitrification device is commonly used in the bioreactor integrated pressure buoyancy separation tank 302 is applicable to the representative same.

Bioreactor integrated pressurized floatation separation tank 302 according to an embodiment of the present invention, as shown in Figure 6, the outer side of the raw water supply pipe 400 is connected to the emptying cylinder 401 for storing the raw water, and the cylinder (401) a shaft 403 which rotates along the inside and has a stirring blade 402 at the lower side, a drive unit 405 which rotates the shaft 403 and includes a cyclone reducer 404, and a shaft ( A skimmer 406 mounted on the upper portion of the 403 to filter the contaminants injured from the raw water through rotation, and a pressurized injury installed about the shaft 403 to pressurize the raw water supplied from the raw water supply pipe 400. The separation tank 407 and the bioreaction tank 408 configured at the lower portion of the pressure floatation separation tank 407 may be configured, wherein the pressure floatation separation tank 407 and the bioreaction tank 408 are one tank in the cylinder 401. It has a feature consisting of.

In addition, the bottom of the bioreactor 408 is formed by the inclined surface 409 inclined around the axis 403 is configured to drive the precipitate around the axis 403 as the stirring blade 402 rotates. .

The biological biosorption denitrification and dephosphorization of sewage and wastewater according to an embodiment of the present invention will be described as follows.

According to the apparatus as shown in FIG. 4 according to the embodiment of the present invention, the raw water whose flow rate is adjusted through the flow rate adjusting step and the first step of adjusting the flow rate of raw water through the flow rate adjusting tank 300 are processed. Step 2 to complete the anoxic treatment of the raw water through the step 2, and the step 3 to input the anoxic treated raw water into the bioreactor integrated pressure buoyancy separation tank 302, the raw water treated through the aeration tank 303 In step 4 of aeration, and a step 5 of precipitating the aerated raw water through the settling tank 304, the organic phosphorus treatment of nitrogen wastewater is completed.

In the third step, the sludge that is floated can be sent to the sludge storage tank 305 to be recovered, dehydrated by the dehydrator 306 and carried out to the cake through the sludge hopper 307.

In the fifth step, the excess sludge in excess of phosphorus generated in the precipitation is transferred to the flow adjusting tank 300 or the oxygen-free tank 301 to complete biosorption and denitrification in a short time, and the three-step bioreactor integrated floating separator ( In 302) it is possible to remove all the excessive intake of phosphorus contained in the raw water.

According to the apparatus as shown in FIG. 5 according to an embodiment of the present invention, it shows a feature that can be integrated into one process without an anoxic treatment step among the characteristics of the five steps as described above.

Denitrification according to an embodiment of the present invention. The preferred operation method of operating the dephosphorization apparatus is as follows.

Induced phosphorus discharge and denitrification of raw water after the first step of the initial mixing-inflow step of mixing the raw water to induce phosphorus release and denitrification by introducing the raw water and the mixing-inflow step of the raw water. 2 steps of the reaction-inflow step of reacting to react, 3 steps of the reaction step of inducing excessive intake of phosphorus nitrification reaction and removal of BOD contained in the raw water undergoing the reaction-inflow step, and precipitation of the raw water undergoing the reaction step by solid-liquid separation Biological denitrification and dephosphorization treatment apparatus for organic sewage and wastewater consisting of four stages of denitrification and dephosphorization in a discharge-rest stage in which the raw water treated through the sedimentation step is discharged or discharged by sludge treatment. The general operation method can be changed as follows.

Specifically, by filling the contact medium in the first step of the flow adjustment tank operation step starting with the mixing-inflow step, the mixing-in the previous step consisting of the mixing-inflow, reaction-inflow, reaction, precipitation, discharge-rest satisfy the oxygen-free condition in one step operation mode, comprising the step entering and, the NO ₃ -N contained in the number of feed treated water of NO ₃ -N and cyclic process with sludge denitrification and denitrification in anaerobic conditions and the raw absorption It can remove organic matter in high concentration organic wastewater. This is an operational benefit of the device appearing in accordance with the application of the bioreactor integrated pressure flotation tank 302, where the contact medium to be injected into the flow control tank 300 or anoxic tank 301 using a cool shell, closed angle, etc. Calcium eluted from the media can also chemically remove phosphorus compounds.

The nitrogen and phosphorus treatment apparatus of sewage and wastewater and a method thereof according to an embodiment of the present invention have the following characteristics.

In the aeration tank 303, the excess sludge in which excess intake of phosphorus is made is filled into a contact medium in a concave inclined form, and is transferred to a flow adjusting tank 300 in which stirring blades are installed. At this time, even if the flow rate increases, the flow fluctuation is alleviated to obtain a stable treated water. NO ₃ -N is denitrified with N ₂ gas under anoxic conditions, high concentration of organic matter in the wastewater, which is introduced by the denitrification and bioadsorption of surplus sludge in the endogenous state, is removed, and the flow control tank filled with contact media ( 300) or sludge ingested with excess phosphorus transported to the oxygen-free tank 301 does not release phosphorus due to NO ₃ -N inhibitory action, and the sludge ingested with excess phosphorus that has undergone biosorption is integrally pressure-wound separated from the bioreactor. The whole quantity is removed by the tank 302. In this process, the problem of bioadsorption due to circulation and repetition is eliminated, and the pressurized flotation separation water is mixed with the return sludge in the bioreactor 408 integrally formed with the pressurized flotation separation tank 407 in an anaerobic state. Removal of organic matter occurs by phosphorus release. Meanwhile, the treated water in which the suspended solids are removed from the pressurized floatation separation tank 407 and the phosphorus is released from the bioreactor 408 performs the next step of removing the residual organic matter, nitrification, and excessive intake of phosphorus in the aeration tank 303. After the separation of the solids in the settling tank (304), the excess sludge, which is ingested with excess phosphorus with NO ₃ -N, is transferred to the oxygen-free, flow adjusting tank 300 to start the circulation of another treatment process.

In order to remove nitrogen and phosphorus from wastewater under high organic concentration, bioreactors (anaerobic tanks), anaerobic tanks, and aerobic tanks should generally be composed separately. In addition, heterotrophic microorganisms are required when high concentrations of dissolved organic substances or large amounts of suspended solids are introduced. Due to abnormal proliferation and fine suspended solids, sludge sedimentation of aerobic tank is decreased, nitrification reaction is inhibited due to sensitive reaction to nitrogen and organic material load, and sludge is lost through sedimentation tank. A primary settling tank or flotation tank must be installed.

In the present invention, the denitrification may be completed in the flow adjusting tank 300 or the anoxic tank 301 filled with the contact medium. Therefore, if the pressurized flotation tank, anaerobic tank, anoxic tank, and an aerobic tank are separately installed, the installation cost and power equipment are increased, thereby reducing the installation cost, and the pressurized float separation tank 407 and the bioreactor 408 are integrated in the vertical direction. It is possible to achieve the removal of suspended solids, anaerobic and aerobic conditions in one reactor, and to increase the next step, nitrification and excess intake of phosphorus.

The present invention can improve the problems of the conventional biosorption tank (bioreaction tank). That is, in the bioreactor, since the microorganism adsorbs organic material within a short residence time (20-60 minutes), the sludge sedimentation rate is slow after biosorption, so it is difficult to separate the sludge solids through the settling tank. As a result, an increase in the load of suspended substances in the nitrification tank causes nitrification inhibition of the nitrifying bacteria, and the microorganisms in the aeration tank should be used for the intracellular storage substrate absorbed and stored in the bioadsorption tank. Otherwise, intracellular storage capacity is lost in the aeration tank and dissolved organic matter is eluted.

In the present invention, surplus sludge is completed after the biosorption is completed only once in a short time using surplus sludge that is generated and disposed of during the microbial treatment process, rather than the biosorption repeated continuously in the conventional treatment process. The entire amount is removed from the bioreactor integrated pressure flotation separation tank 302 to which the anaerobic tank function is added to achieve biosorption.

In addition, the present invention uses inexpensive and large quantities of oyster shells, shells, etc. as a contact medium, by using the waste resources not used in a specific region can recycle the waste resources in terms of resource circulation cycle, contact Calcium eluted from oyster shells, shells, etc. used as a filter medium can be treated by satisfactorily insolubilizing the phosphorus compound. In addition, when a large amount of ilkari is consumed during nitrification, the pH of the aeration tank is lowered and an alkali agent is required to neutralize it. However, in the present invention, oyster shells, waste shells, and the like are used as contact media, so that dissolution is good compared to limestone, so that alkali is also supplied. Increasing the ability, oyster shell, closed shell, etc. has a high specific surface area of the surface is good microbial adhesion can effectively perform the function of the contact media.

In addition, the present invention has an improved feature on the operation and operation method of the flow control tank filled with the contact medium. In the case of the conventional flow adjustment tank, the functions of flow adjustment and water quality bacteria, etc. were the main functions, but in the present invention, the contact media is filled to perform anoxic function, and in the case of the bioreactor tank 408 filled with the contact media, it is always deposited to secure various microorganisms. It is difficult to deposit at the maximum level and to expose to the air at the minimum level, so the center is low and the surrounding part is filled to the inclined plane so that various microorganisms can be formed according to the water level and air contact. Anaerobic conditions can be achieved by operating only the one of the five-stage operation modes (Mixed-Fill) operation mode, where the biosorption process acts as an equalization of water quality, and thus shows strong characteristics against impact loads and fluctuating loads. Flow control and denitrification are carried out in the reactor.

In addition, the contact medium is deposited in the flow control tank of the sewage and wastewater treatment device at the maximum level, and the center is filled with a low slope in the center and the surrounding area is high so that the exposure to the air can be repeated at the minimum level. It can diversify microorganisms that adapt to high concentration organic wastewater and surplus sludge.

As described above, the present invention provides an aeration tank 303 to reduce sludge sedimentation deficiency due to repetition of anaerobic and aerobic conditions frequently generated in an operating nitrogen and phosphorus treatment system and a decrease in system efficiency due to excessive amount of microorganisms contained in the bioreactor. Or the surplus sludge of the endogenous state generated in the final settling tank 304, that is, excess sludge ingested with phosphorus, surplus sludge capable of bio-adsorption is transferred to the flow control tank 300 or anoxic tank 301 filled with the contact medium and the NO ₃ -N contained in the number of the transfer processing can NO ₃ -N and circulation of the treatment with the excess sludge is denitrification as N ₂ gas in an oxygen-free condition and the surplus flows into the thruster fingers raw adsorption of the denitrification and endogenous state Removes organic substances from wastewater at high concentrations.

In addition, nitrogen and organic substances are removed by denitrification and bioadsorption, and the entire bioadsorption complete sludge is discarded in the bioreactor integrated pressure flotation separation tank 302 to finally remove the microorganisms in which phosphorus is excessively ingested to remove nitrogen and Phosphorus removal is complete.

In addition, particulate organic nitrogen compounds in organic sewage and wastewater are removed after biosorption and pressure flotation and high concentration organic sewage wastewater after pressurized flotation is reduced due to the reduction of C / N ratio and organic matter The process of biological nitrification and phosphorus overingestion, which is a better step, can be performed to stably denitrify and dephosphorize nitrogen and phosphorus in a stable state. The present invention provides high concentrations of organic matter, suspended solids and nitrogen contained in wastewater. Bioadsorption by surplus sludge, which can be suitably used for the treatment of nitrogen and phosphorus in high concentration organic wastewater, including livestock wastewater, slaughter wastewater, and marine product processing wastewater, Allows treatment of nitrogen and phosphorus by bioreactor integrated pressure flotation separation tank.

As such, the present invention integrates the pressure flotation tank and the bioreactor in the vertical direction in a nitrogen-phosphorus treatment apparatus to remove nitrogen and phosphorus in high concentration organic wastewater and wastewater by removing suspended solids and anaerobic / aerobic conditions in one reactor. The anaerobic tank, anaerobic tank, and aerobic tank, which are necessary, do not need to be configured separately, and a sedimentation tank or floating separation tank for removing preliminary substances is not separately configured, thereby reducing the size of the facility.

In addition, the excess phosphorus excessively ingested in the final sedimentation tank is transferred to a flow adjusting tank or an anoxic tank filled with contact media to achieve bioabsorption and denitrification in a short time, and then remove all of the bioreactor integrated pressure floatation tank. It is effective to remove nitrogen, phosphorus and organic substances.

In addition, in the operation of the nitrogen-phosphorus treatment apparatus, the oxygen-free condition can be achieved while operating the nitrogen-phosphorus treatment apparatus using only the mixed-fill operation mode, and the flow rate adjustment and the denitrification process are performed in one reactor. The plant area can be reduced, the organic carbon source needed for denitrification can be easily solved, and the problem of circulating biosorption operation can be solved by total waste after one adsorption by surplus sludge.

In addition, it is effective to diversify microorganisms adapted to high concentration organic wastewater and surplus sludge according to the filling of the contact media in the flow control tank of the wastewater treatment system.

Claims (8)

A flow control tank for adjusting the flow rate of the raw water to be supplied, a settling tank for precipitating the raw water through the flow control, an anaerobic tank for reprocessing the raw water through the settling tank, an anoxic tank for reprocessing the raw water passing through the anaerobic tank, Aeration tank for aeration of raw water treated through anoxic tank, sedimentation tank for precipitating raw water while supplying sufficient oxygen to raw water through the aeration tank, and returning the surplus treated water treated through the sedimentation tank to anaerobic tank, or recovered raw water from sedimentation tank In the sludge storage tank for collecting raw sludge contained in the organic sewage, wastewater nitrogen, which is provided with a sludge hopper for storing the sludge dewatered through the dehydrator, the dehydrator for dewatering the sludge recovered in the sludge reservoir tank. , A flow rate adjusting tank for adjusting the flow rate of raw water introduced from the outside; An oxygen-free tank for treating raw water whose flow rate is adjusted through the flow rate adjusting tank in an oxygen-free state; A bioreactor integrated pressure floatation separation tank for treating raw water that has undergone the anoxic tank, An aeration tank for aeration of the treated water passing through the bioreactor integrated pressure floatation separation tank; Consists of the final sedimentation tank to precipitate the treated water aerated through the aeration tank, Organic sludge is characterized in that the sludge storage tank is connected to the bioreactor integrated pressure flotation separation tank side to treat the sludge floating from the bioreactor integrated pressure flotation separation tank and dewatered through a dehydrator to take out the sludge in the cake state. Nitrogen-phosphorus treatment apparatus for waste water. The method of claim 1, The bioreactor integrated pressure flotation separation tank, The hollowed out cylinder for storing the raw water is connected to the external raw water supply pipe, A shaft rotating along the inside of the cylinder and having a stirring blade at a lower side thereof; A drive unit rotating the shaft and having a cyclone reducer; A skimmer mounted on top of the shaft to filter contaminants injured from raw water through rotation; A pressurized floatation separation tank installed around an axis to pressurize the raw water supplied from the raw water supply pipe; Nitrogen phosphorus treatment apparatus for organic sewage and wastewater, characterized in that consisting of a bioreactor configured in the lower portion of the pressurized flotation separation tank. An anoxic tank for reprocessing the raw water passing through the anaerobic tank, a flow regulating tank for regulating the amount of raw water supplied, a settling tank for sedimenting the raw water, and an anaerobic tank for reprocessing the raw water through the settling tank; Aeration tank for aeration of the raw water treated through, a precipitation tank for precipitating the raw water while supplying sufficient oxygen to the raw water through the aeration tank, to return the surplus treated water treated through the precipitation tank to the anaerobic tank, or to the raw water recovered from the sedimentation tank A sludge storage tank for collecting raw sludge, a dehydrator for dewatering sludge recovered in the sludge storage tank, and a sludge hopper for storing sludge after dehydration through the dehydrator, wherein the nitrogen. A flow rate adjusting tank for adjusting the flow rate of raw water introduced from the outside; A bioreactor integrated pressure floatation separation tank for processing raw water whose flow rate is adjusted through the flow rate adjusting tank, An aeration tank for aeration of the treated water passing through the bioreactor integrated pressure floatation separation tank; Consists of the final sedimentation tank to precipitate the treated water aerated through the aeration tank, Organic sludge is characterized in that the sludge storage tank is connected to the bioreactor integrated pressure flotation separation tank side to treat the sludge floated from the bioreactor integrated pressure flotation separation tank and dewatered through a dehydrator to take out the sludge in the cake state. Nitrogen-phosphorus treatment apparatus for waste water. The flow adjustment process in which raw water flows into the flow control tank, the initial precipitation process in which the raw water through the flow adjustment tank is first settled through the settling tank, the anaerobic process in which the raw water undergoes the initial precipitation process in the anaerobic tank, and the raw water through the anaerobic process An anoxic treatment process for treating raw water in an oxygen-free state via an anoxic tank, and an internal circulation process for repeatedly treating the raw water by internally circulating the raw water during the anaerobic treatment and anoxic treatment process, and undergoes the anoxic treatment process. In the biological denitrification. , 1 step of adjusting the flow rate of the raw water through the flow adjustment tank; And the second step of sending the raw water whose flow rate is adjusted through the flow rate adjusting step to an oxygen-free tank, Comprising three steps to complete the anoxic treatment of the raw water through the two steps and to put the anoxic raw water into the bioreactor integrated pressure buoyancy separation tank, and 4 steps of aeration of the raw water processed through the step, Nitrogen phosphorus treatment method of organic sewage waste water, characterized in that consisting of five steps of precipitating the aerated raw water through the step. The method of claim 4, wherein The excess sludge ingested in the 5th precipitation step is transferred to a flow control tank or an anoxic tank to complete biosorption and denitrification in a short time, and the excess water contained in the raw water in the 3rd step bioreactor integrated flotation tank. Nitrogen and phosphorus treatment method of organic sewage and wastewater, characterized in that to remove all intake phosphorus. A flow control tank operation step beginning with the first stage of initial mixing-inflow to mix raw water to induce phosphorus release and denitrification by introducing raw water, and the phosphorus discharge and denitrification reaction of raw water after the raw water mixing-inflow step 2 steps of the reaction-inflow step of reacting to induce, 3 steps of the reaction step of inducing excess intake of phosphorus nitrification reaction and removal of BOD contained in the raw water undergoing the reaction-inflow step, Biological denitrification and dephosphorization treatment method of organic sewage and wastewater consisting of four steps of sedimentation step and sedimentation and dephosphorization step of discharge and wastewater discharged or discharged by discharging raw water treated through the sedimentation step. To Filling the contact medium in the first step of the flow adjustment tank operation step starting with the mixing-inflow step, the mixing-inflow step of the mixing-inflow, reaction-inflow, reaction, precipitation, discharge-pause It satisfies anoxic conditions with one-stage operation mode, and denitrates NO ₃ -N in treated water transported with sludge and NO3-N in circulated treated water, and it is organic in high concentration due to denitrification and biosorption under anoxic conditions. A method for operating a nitrogen-phosphorus treatment apparatus for organic sewage and wastewater, characterized by removing organic matter from the wastewater. The method of claim 6, Nitrogen and phosphorus in organic sewage and wastewater, characterized in that it is possible to chemically remove phosphorus compounds, such as calcium eluted from the contact media, by using a cool shell, a waste shell, or the like as the contact media injected into the flow regulating tank or the anoxic tank. Operation method of processing device. The method according to claim 6 or 7, The contact medium to be injected into the flow control tank is deposited at the maximum water level and the air is filled at an inclined surface with a low center and a surrounding portion so that the exposure to the air can be repeated at the minimum water level. Operation method of nitrogen-phosphorus treatment apparatus of waste water.