KR20060024288A - A high efficiency sewage and wastewater treatment apparatus and method by vortexed biological reactor-settler - Google Patents

Abstract

The present invention is an MLSS of a bioreactor by additionally installing a separate reaction tank precipitation apparatus in a space division aeration reactor or a time division aeration reactor for the advanced treatment of sewage in existing or newly established sewage and wastewater treatment systems. The present invention relates to a high efficiency sewage and sewage treatment system and method using a reaction tank sedimentation apparatus which can increase the concentration, improve the reaction efficiency, and reduce the loading rate of the secondary sedimentation basin, thereby improving the efficiency of removing the suspended solids (SS). .

The present invention, a bioreactor for treating the influent sewage by a biological reaction; It is installed on the discharge side of the bioreactor, inflow of treated water during the aeration to deposit the sludge with high concentration to go through the denitrification process, and the sludge with low concentration induces the formation of an upflow, and then re-aeration Reaction tank precipitation means; And a secondary sedimentation basin provided with a means for depositing and removing a causative substance (BOD) and suspended solids (SS) contained in the treated water flowing over from the reaction tank settling means, and returning a part of the treated water to the bioreactor. It provides a high efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a.

Reaction tank sedimentation basin, bioreactor, primary anoxic tank, reaeration tank, secondary settler

Description

High efficiency sewage and wastewater treatment apparatus and method by vortexed biological reactor-settler}             

1 is a schematic diagram showing a treatment process of a general sewage and wastewater treatment apparatus.

2 is a graph showing the relationship between organic pollutant load (F / M ratio) and BOD treatment efficiency of a bioreactor.

Figure 3 is a graph showing the relationship between the repair load rate and the treated water SS concentration of the secondary needle battery.

4 is a graph showing the relationship between the solid matter load rate and the treated water SS concentration of the secondary needle battery.

5 is a schematic diagram showing an advanced treatment apparatus using a space division aeration method as an embodiment of the sewage and wastewater treatment apparatus using the reaction tank precipitation apparatus according to the present invention.

Figure 6 is a schematic diagram showing a flow path change type advanced treatment process as another embodiment of a high efficiency sewage and waste water treatment apparatus using the reaction tank precipitation apparatus according to the present invention.

7 is a plan sectional view schematically showing the internal configuration of the reaction tank precipitation apparatus that is the main part of the present invention;

Figure 8 is a cross-sectional view showing the configuration of the inclined plate for solid-liquid separation that is the main part of the present invention.

Figure 9 is a schematic sectional view schematically showing the configuration of the reaction precipitation basin as the main part of the present invention.

* Explanation of symbols for main parts of the drawings

100: primary settler 200: bioreactor

201: anaerobic tank 202: second anaerobic tank

203: aerobic oxidation tank 300: precipitation apparatus

301: internal precipitate 302: primary oxygen-free tank

303: reaeration tank 311: inlet pipe

312: vortex guide wall 313: sludge outflow pipe

314: nitrate sludge supply pipe 315: suction pump

316: circulating flow rate increasing fan 317: water flow control

318: carbon supply device for denitrification 321: rectifying plate

322: solid-liquid separation inclined plate 323: inclined plate cleaning piping

324: overflowware 325: runoff

400: secondary settler

The present invention is applied to a standard activated sludge method including a bioreactor and a secondary sedimentation battery, or to a sewage and wastewater treatment facility that performs advanced treatment of a time division or space division aeration method, and is a solid material that is a major pollutant included in sewage. The present invention relates to a sewage and wastewater treatment apparatus and method for treating organic substances, nitrogen, phosphorus, and the like, and more particularly, to remove nitrogen and phosphorus in an aeration tank having a small hydraulic retention time by adding a reaction tank precipitation apparatus to a bioreactor. High efficiency sewage and sewage using the reaction tank sedimentation device which can improve the efficiency and replace the excessive load fluctuation without the flow adjustment tank, and can improve the treatment efficiency and increase the treatment capacity by reducing the repair load and the solid load of the secondary settler. It relates to a wastewater treatment apparatus and method.

In general, among the pollutants to be removed in sewage and waste water, the main elements are organic matter (BOD, COD), suspended solids (SS), nitrogen (N) and phosphorus (P), as a method for removing such pollutants Biologically activated sludge is used. In addition, since PH, water temperature, toxic substances, etc. are factors that affect the biological treatment environment, pretreatment or special treatment is performed if necessary.

A representative biological treatment method is an activated sludge method, and the treatment structure of this method includes a primary needle battery 100, a bioreactor 110, and a secondary needle battery 120 as shown in FIG. 1. The bioreactor 110 has a function of culturing microorganisms capable of sedimentation and separation by ingesting contaminants, and the processing efficiency thereof is an organic material load ratio (F /) indicating a ratio of organic matter decomposition intake by microorganisms as shown in FIG. M ratio, F: organic matter amount, M: microbial amount <= reaction volume V × microbial concentration Xb>). In the case of the standard activated sludge method which mainly aims to remove BOD, when nitrification occurs, denitrification reaction occurs in the secondary sedimentation basin 120, causing sludge to float, and the amount of air required in the bioreactor becomes excessive, so the F / M ratio is 0.2. The smaller the value is within 0.4, the better the processing efficiency. In addition, microorganisms that highly treat nitrogen and phosphorus have a slower growth rate than BOD-treated microorganisms, so the sludge retention time (SRT) should be longer than 9 days and the F / M ratio should be 0.15 or less. Should be reduced.

The aeration tank and secondary sedimentation cell of the general activated sludge process share the microbial culture and solid-liquid separation function.The aeration tank MLSS concentration determines the loading rate of the secondary sedimentation cell, and the sludge return of the secondary sedimentation cell determines the aeration tank MLSS concentration. It is inseparable.

Each treatment facility is expressed by the following formula to improve the treatment efficiency.

F / M = (Q x S ₀ ) / (V _at x MLVSS) --------------------------------- -(One)

Where Q: Sewage S ₀ : BOD concentration

V _at : aeration tank volume MLVSS: immature concentration = 0.8 x MLSS

* F / M ratio decreases when V _at or MLVSS increases with Q x S determined

MLSS = r / (1 + r) x Xr --------------------------------------- -(2)

Where r: sludge conveyance rate Xr: conveyed sludge concentration (6,000 to 8,000 mg / l)

* Increase bounce rate (r) to increase MLSS

Secondary Settler Solids Load = Q x (1 + r) x MLSS / A _st ----------------- (3)

Where A _st : secondary settling surface area

Secondary Battery SS Treatment Efficiency ∝ 1 / solid load ratio

* High MLSS and return rate (r) increase solids load rate, reducing efficiency

As shown in the graphs of FIGS. 3 and 4 (source: journal of environmental engineering / june 2001: page 480, 481), SS concentration increases as the repair load rate of the secondary sedimentation battery increases, and solid state load rate increases as SS concentration increases. This increases.

Therefore, as shown in Equations (1) to (3), the above equations show opposite results, and therefore, the most economical MLSS concentration of aeration tank 1,500 to 3000 ml / l by analyzing the construction cost of the aeration tank and the settling basin according to the MLSS concentration. It is designed for 6 ~ 8 hours of hydraulic stay time, 20 ~ 30㎥ / m² of surface area of secondary sedimentation battery, and 95 ~ 145kg / m² of solid material loading rate (Sewerage Facility Standard, Ministry of Environment, 1998, PP.463, pp372).

On the other hand, high-level treatment of nitrogen and phosphorus increases the microbial mass by increasing the sludge retention time (SRT) for nitridation and denitrification cultures with slow growth rate as shown below. The oxidation and reduction processes are removed repeatedly.

Phosphorus Advanced Processing Mechanism

Anaerobic Status ↔ Aerobic Status → Sludge Emission

Excessive intake of organic matter absorbed phosphorus is released to the system

Decomposition concentrated organic matter releasing phosphorus, dehydration

Advanced Nitrogen Processing Mechanism

Aerobic state (nitrification) ↔ anoxic state (denitrification) → N ₂ gas discharge

NH ₄ -N → NO ₃ ^- NO ₃ ^- + Organic matter → N ₂ gas

Simultaneous Advanced Treatment of Nitrogen and Phosphorus

                               ↓ -------------------------------- ｜

Anaerobic tank (organic + phosphorus release) → anoxic tank (organic + denitrification) → aerobic tank (nitrification, phosphorus absorption)

In order to increase the treatment efficiency or the advanced sewage treatment as described above, the microbial culture in the aeration tank should be increased or the secondary sedimentation cell loading rate should be reduced. However, in the conventional sewage treatment methods, the concentration of microorganisms in the aeration tank is directly discharged into the secondary sedimentation cell. There is a limit to this, and accordingly, in order to increase the culture concentration, the capacity of the facility must be increased. In addition, the method of increasing the amount of microorganisms in the aeration tank by adding the carrier to the aeration tank is also environmentally friendly because the carrier's microbial adhesion growth characteristics change over time due to the activity of the microorganisms. There is a problem.

Therefore, the present invention has been proposed to solve the limitation problem of the improvement of the prior art as described above, the reaction of the spatial division aeration method for the advanced treatment of sewage in the existing or new sewage and wastewater treatment system. By adding a separate reactor type settling device to the tank for the time division aeration method, the MLSS concentration of the bioreactor can be increased to improve the reaction efficiency, and the loading rate of the secondary settler can be reduced to remove the suspended solids (SS). It is an object of the present invention to provide a high efficiency sewage and waste water treatment apparatus and method using a reaction tank precipitation apparatus that can improve the efficiency.

In addition, the present invention is formed in the form of a reaction tank sedimentation device built in the bioreactor in the form of a combination of the denitrification function of the anaerobic tank and the sedimentation of the sedimentation basin to increase the space utilization efficiency, reduce the return rate of the secondary sedimentation basin to reduce the power cost Another object of the present invention is to provide a high efficiency sewage and wastewater treatment apparatus and method using a reaction tank sedimentation apparatus that can reduce the load ratio and improve the treatment capacity of an existing treatment plant.

In addition, the present invention is a high-efficiency sewage and wastewater treatment using a reaction tank sedimentation apparatus that can suppress the sludge injury of the secondary sedimentation basin generated during the over-aeration of the biological reaction tank by a separate re-aeration tank provided in the reaction tank sedimentation basin It is another object to provide an apparatus and method.

The present invention for achieving the above object, the biological reaction tank for treating the influent sewage by biological reaction; It is installed on the discharge side of the bioreactor, inflow of treated water during the aeration to deposit the sludge with high concentration to go through the denitrification process, and the sludge with low concentration induces the formation of an upflow, and then re-aeration Reaction tank precipitation means; And a secondary sedimentation basin provided with a means for depositing and removing a causative substance (BOD) and suspended solids (SS) contained in the treated water flowing over from the reaction tank settling means, and returning a part of the treated water to the bioreactor. It provides a high efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a.

In addition, the present invention is the first step of depositing the activated sludge by a biological reaction by storing the influent flowing from the outside in the bioreactor and then aeration; A second step of introducing the sludge during the aeration process in the bioreactor into the internal settler of the reactor type precipitation apparatus to precipitate the sludge having a high concentration, and float the treated water including the sludge having a low concentration; A third step of carrying out a denitrification process by introducing a sludge having a high concentration into a primary anoxic tank provided at one side of an internal sedimentation basin of the reaction tank precipitation apparatus and introducing some sludge in the aeration from the bioreactor; A fourth step of storing the treated water flowing from the internal sedimentation basin of the reaction tank sedimentation unit in a reaeration tank installed on one side of the internal sedimentation cell and performing reaeration; And a fifth step of introducing the treated water after the aeration from the reaeration to the secondary sedimentation basin to precipitate unprocessed causative substances and suspended solids, and returning some sedimentation sludge to the bioreactor. Provides high efficiency sewage and wastewater treatment methods.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 5 to 9.

High efficiency sewage and wastewater treatment apparatus and method using the reaction tank sedimentation apparatus according to the present invention is to install a separate reaction tank sedimentation basin in the existing bioreactor or newly established bioreactor and return most of the sludge deposited therein to the bioreactor. Therefore, it is possible to increase the efficiency of nitrogen and phosphorus removal in biocoagulation and to improve the efficiency of BOD and SS precipitation removal of secondary sedimentation batteries to maximize the treatment efficiency of the entire water treatment process.

The present invention is applied to an existing fully-mixed activated sludge method, a reaction tank for performing a space-divided aeration method, a reaction tank for performing a time-divided aeration method, and a ditch type altitude for performing a time-division or phase-divided aeration method. It has a structure applicable to each treatment reaction tank, which will be described in detail.

First, an example in which the present invention is applied to a bioreactor performing a space division aeration method will be described with reference to FIG. 5.

As shown in the figure, the primary sedimentation basin 100 for physically removing suspended solids having good sedimentability by primary storage of sewage and waste water; An anaerobic tank 201, a secondary anaerobic tank 202, and an aerobic oxidation tank 203 are sequentially divided into spaces in the flow direction of the inflow water; It is installed at the rear end of the aerobic oxidation tank 203 of the bioreactor 200, and deposits the sludge contained in the influent using density flow and vortex, and induces biological reaction of the deposited sludge and the treated water. Reaction tank precipitation apparatus 300 for processing; And precipitate the causative material (BOD) and the suspended solids (SS) contained in the treated water discharged from the reaction tank settling device 300, and the sludge concentrated after the precipitation into the bioreactor 200. The secondary settling chamber 400 is provided with a conveying line 400a for conveying to further denitrification, phosphorus and aerobic treatment.

In the present embodiment, the reaction tank settling apparatus 300 is shown an example embedded in the bioreactor 200, but is not limited to this, using the space between the bioreactor 200 and the secondary settling chamber 400 It is well known that the reaction tank precipitation apparatus 300 may be installed.

The reaction tank precipitation apparatus 300 is partitioned from the bioreactor 200 with the partitions therebetween, and inflow of the effluent after abandonment in the bioreactor 200 to carry out the precipitation process to overflow the treated water to a reaeration tank to be described later. Internal sedimentation basin 301; A first anoxic tank 302 provided in one space of the internal sedimentation basin 301 to carry out a denitrification process of the nitrified sludge flowing out therefrom and to return the nitrified sludge to the secondary anoxic tank 202; It is provided in one side space of the internal sedimentation basin 301, and partitioned with the primary anoxic tank 302 with a partition therebetween, and is provided with a brower 303a to reflow the treated water flowing from the internal sedimentation basin 301. It consists of the reaeration tank 303 to implement.

Here, the inner sedimentation basin 301 has a structure in which the bottom portion is recessed toward the center portion side, and has a rounded corner of the square portion in order to facilitate the flow of the effluent.

The reaeration tank 500 is sludge due to anaerobic decomposition due to low dissolved oxygen (DO) concentration of the sludge introduced into the secondary sedimentation basin 400 is not consumed enough for denitrification in the reactive sedimentation basin (300) It is designed to prevent the cause of the bulky.

As illustrated in FIGS. 7 to 9, the internal settling battery 301 is installed at a lower side of a wall forming a boundary between the aerobic oxidation tank 203 and nitrification in the aerobic oxidation tank 203. An inlet pipe 311 for introducing the gas; A vortex inducing wall 312 disposed in the inner settler 300 in at least one upright circumferential tangential direction to form a spiral and cause a flow of density and vortex; One side is located upright by a predetermined height from the bottom of the inner precipitator 301, a plurality of slits 313a are formed on the upright side to suck out the sludge with a higher concentration, and the other side is penetrated by the primary anaerobic tank 302. Sludge outflow pipe 313; A nitrate sludge supply pipe 314 installed through the lower part of the internal settler 301 to supply the sludge abandoned in the aerobic oxidation tank 203 to the primary anoxic tank 302; A suction pump 315 installed at a discharge side of the outlet pipe 313 to suck sludge; It is installed in the vicinity of the inlet pipe 311 to provide a wind speed of a predetermined flow rate, and when the solid-liquid separation function of the internal settler 301 is excessively increased MLSS concentration of the aeration tank 203 unnecessarily increases the outflow of sludge A circulation flow rate increasing fan 316 for increasing the settling load rate; A flow control water gate 317 installed at one end of the suction pump 315 to control the flow rate so that excessive sludge does not accumulate in the precipitation space; The denitrification carbon supply device 318 is installed at a predetermined position of the inlet pipe 311 to provide an appropriate amount of carbon organic matter necessary for the denitrification reaction.

The denitrification carbon supply device 318 includes a PH measuring device, an ORP measuring device, a carbon injection controller, and a carbon organic ejector.

In addition, a rectifying plate 321 having a plurality of rectifying holes 321a formed on the upper part of the inner settler 301 to allow the upward flow of the treated water to swirl and rise by the vortex inducing wall 312; A solid-liquid separation inclined plate 322 arranged to be inclined at predetermined intervals at the bottom of the rectifying plate 321 to evenly disperse the rising flow having a low concentration, and to secure the water flow stability of the precipitation space; One side is installed under the solid-liquid separation inclined plate 322, the other side is installed on the rectifying plate 321, the inclined plate washing pipe for periodically cleaning and discharge sludge likely to accumulate in the solid-liquid separation inclined plate 322 ( 323); A overflowware 324 installed on the rectifying plate 321 to overflow the treated water flowing out through the rectifying hole 321a; It is connected to the overflow wear 324 is provided with an outflow passage 325 for guiding the treated water discharged therethrough into the reaeration tank 303.

In this embodiment, the solid-liquid separation inclined plate 322 has a slope of 55 ° to 65 °, but is inclined in a direction opposite to the flow direction of the treated water rising while swirling to sufficiently in the settling space of the internal settling battery 301. The sludge that could not be removed is deposited on the slope to induce it to fall into the settling space by the density difference.

Primary sedimentation basin 100 in the present invention may be made of a gravity type or a pressure flotation, it can be omitted depending on the conditions of the influent sewage. In addition, the secondary sedimentation basin 400 may be composed of a gravity sedimentation apparatus equipped with a sludge conveying apparatus.

Referring to the sewage and waste water treatment method of the present invention configured as described above are as follows.

First, inflow of sewage into the primary sedimentation basin 100 removes suspended solids having good physical settling properties, and stores the inflow water passing through the primary sedimentation basin 100 in the bioreactor 200 to perform aeration. .                     

At this time, the sludge during the aeration process in the aerobic oxidation tank 203 of the bioreactor 200 is introduced into the internal settler 301 through the inlet pipe 311 and the inflow water is spiraled by the vortex guide wall 312 As the circle flows, it moves up. At this time, the concentration of concentrated sludge formed locally during the rising degree is formed to flow to the center of the settling space to form a density flow. The concentrated sludge is introduced into the slit 313a of the outlet pipe 313 installed at the bottom of the inner settler 301 and discharged to the primary anoxic tank 302, and the quality penetrates the bottom of the settler 301. Nitric acid sludge aerated in the aerobic oxidation tank is introduced into the primary anaerobic tank 302 through the acidic sludge supply pipe 314. In the primary anoxic tank 302, a denitrification process is performed using nitrate sludge flowing from the concentrated sludge and the aerobic oxidation tank 203 as a carbon source, and some nitrified sludge is returned to the secondary anoxic tank 202.

On the other hand, the sludge lowered in the concentration rise in the internal settler 301 once again rises through the solid-liquid separation inclined plate 322 to perform the solid-liquid separation sediment separated sludge is precipitated on the upper surface of the inclined plate 322. In addition, the treated water precipitated with low MLSS concentration is introduced into the overflowware 324 through the hole 321a of the rectifying plate 321, and the treated water discharged through the overflowware 324 is an outflow water ( Into the reaeration tank 303 through the 325. In the reaeration tank 303, the aeration is carried out by using the air injected through the brower 303a to extinguish the organic matter and then flow out to the secondary sedimentation basin 400.

In the secondary sedimentation basin 400, the cause material (BOD) and the suspended solids (SS) contained in the treated water flowing out of the reaeration tank 303 are precipitated, and the precipitated sludge is concentrated through the conveying line 400a. By returning to the bioreactor 200 is used to supplement the microorganisms required for the dephosphorization process of the anaerobic tank 201 and the denitrification process of the secondary anaerobic tank 202.

In this way, by supplementing the amount of microorganisms required for advanced processing through the reaction tank precipitation apparatus 300 built in the bioreactor 200, the microbial amount in the reaction tank can be maintained at an appropriate F / M ratio. Accordingly, the amount of suspended matter (solid matter) introduced into the secondary sedimentation basin 400 may be reduced, and the removal efficiency of organic matter and suspended matter in the secondary sedimentation basin may be increased by reducing the loading rate of the secondary sedimentation basin, and the secondary sedimentation basin 400 may be reduced. The amount of conveyed sludge returned to the bioreactor 110 is also reduced, thereby reducing the secondary settler repair load rate and significantly reducing the power ratio of the entire water treatment process.

Next, an example in which the present invention is applied to a bioreactor performing a time division aeration method will be described with reference to FIG. 6.

FIG. 6 shows an embodiment in which the reactor type precipitation apparatus 300 according to the present invention is applied to a ditch type advanced treatment reactor in which a time division or phase division aeration method is performed. It is used as an advanced treatment facility that can perform advanced processing by forming aerobic, anaerobic and aerobic conditions by performing aeration and non-aeration at the same time.

Prior to describing the present embodiment, since the structure of the primary settler 100, the reactor settler 300 and the secondary settler 400 are all the same, the same reference numerals are given for the same structure, and further detailed description will be given. Omit. However, the present embodiment has a structure in which the primary anaerobic tank is omitted in the reaction tank sedimentation basin 300 because of the time division aeration method. Therefore, in the present embodiment, only the channel-type reaction tank having a structure different from that of the completely mixed reaction tank described in the first embodiment described above, and the installation positions of the reactive settling basins 300 will be described.

As shown in FIG. 6, the bioreactor 200 is divided into two spaces to form a structure in which a central dividing wall 511 is erected in the transverse direction so as to maintain a circulating flow in a spiral horizontal direction. In this figure, a structure in which two papers are bundled and formed into two reaction tanks is shown, wherein the central separation wall 511 forms a structure in which the inflow water circulates through both ends thereof.

The inner settler 301 and the re-aeration tank 303 are provided across the side wall of the central separation wall 511 and the bioreactor 200, the bottom portion thereof is spaced apart from the bottom of the bioreactor 200 by a predetermined interval inflow water Form a passage through which

In the present embodiment, the internal settling battery 301 has a height of 1/3 to 1/2 of the depth of the bioreactor 200 and is installed on the water surface to form a precipitation space in which horizontal flow of the bioreactor 200 is blocked. Done.

In addition, the re-aeration tank 303 is provided with an outflow passage 513 for introducing the treated water to the secondary sedimentation basin 400 side to connect the bioreactor 200 to the secondary sedimentation battery 400.

At least one horizontal flow generating pump 513 is installed in the bioreactor 200 to generate horizontal circulating flow of influent, and the horizontal flow generating pump 513 in the present embodiment is in the bioreactor 700. Operate to maintain the flow rate of influent water 0.1 ~ 0.3m / sec.                     

One side of the central separation wall 511 of the bioreactor 200 may be further provided with a water flow guide wall (not shown) which is installed in a curved shape at a predetermined distance therefrom to guide the circulating movement path of the influent.

The treatment method of the example applied to the reaction apparatus which performs the present invention configured as mentioned above and a fully-mixed activated sludge method and time division aeration method is demonstrated.

Inflow sewage flows into the primary sedimentation basin 100 to remove suspended solids having good physical settling properties, and the bioreactor 200 performs aeration while forming a mixed water stream in which the inflow water is completely mixed. When the inflow water flows into the bioreactor 200 from the primary sedimentation basin 100, the horizontal flow generating pump 412 is operated. At this time, the flow rate of the inflow water is to be a horizontal flow maintaining 0.1 ~ 0.3m / sec, and the spiral horizontal circulation flow is maintained by the central separation wall 511 and the water flow guide wall (not shown).

In the bioreactor 200 by dividing each area partitioned by the central separation wall 511 by the time zone and repeating the aeration and fine aeration to make anaerobic conditions, anoxic conditions and aerobic conditions to remove nitrogen and phosphorus, the mixed water stream By the sludge removed from the settling space formed by the central separation wall 511 without a separate mixing facility is returned to the bioreactor 200 by the density difference.

The sludge treated while repeatedly performing aeration and fine aeration while circulating the various parts of the bioreactor 200 is introduced into the internal settler 301 through the inlet pipe 311 and the inflow water is spiraled by the vortex guide wall 312. As the circle flows, it moves up. At this time, the concentration of concentrated sludge formed locally during the rising degree is formed to flow to the center of the settling space to form a density flow. The concentrated sludge is introduced into the slit 313a of the outlet pipe 313 installed at the bottom of the inner settler 301 and discharged into the bioreactor 200 to be mixed with the circulation stream for further denitrification, dephosphorization and aerobic treatment. Used to supplement microorganisms.

On the other hand, the sludge lowered in the concentration rise in the internal settler 301 once again rises through the solid-liquid separation inclined plate 322 to perform the solid-liquid separation sediment separated sludge is precipitated on the upper surface of the inclined plate 322. In addition, the treated water precipitated with low MLSS concentration is introduced into the overflowware 324 through the hole 321a of the rectifying plate 321, and the treated water discharged through the overflowware 324 is an outflow water ( Into the reaeration tank 303 through the 325. In the reaeration tank 303, the aeration is carried out by using the air injected through the brower 303a to extinguish the organic matter and then flow out to the secondary sedimentation basin 400.

In the secondary sedimentation basin 400, the cause material (BOD) and the suspended solids (SS) contained in the treated water flowing out of the reaeration tank 303 are precipitated, and the precipitated sludge is concentrated through the conveying line 400a. It returns to the bioreactor 200 to replenish the amount of microorganisms.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

As described above, according to the present invention, the efficiency of removing nitrogen and phosphorus by additionally installing a reaction tank precipitation apparatus in the aerobic or anaerobic bioreactor of the advanced sludge process using the airborne microorganism or the anaerobic tank of the advanced treatment method using the media. It is possible to maintain the treatment efficiency of the processing plant with large fluctuations in the inflow load rate without the flow adjustment tank, and to improve the SS removal efficiency by reducing the secondary settling solid load due to the decrease of the amount of return sludge and the decrease of the MLSS concentration of the aeration tank. Therefore, there is an effect that the treatment efficiency of the entire treatment process is improved.

In addition, the present invention can significantly reduce the power ratio of the entire water treatment process by reducing the amount of conveying sludge, there is another effect that can increase the treatment capacity of the existing treatment plant.

In addition, the present invention is capable of cultivating a large amount of microorganisms in a high concentration without reducing the volume of the reaction tank even with a short hydraulic retention time (aeration tank) is another effect that can be expanded to more than 80% of the capacity of the existing treatment facility lacking capacity There is.

Claims (16)

Bioreactor for treating influent sewage by biological reaction; It is installed on the discharge side of the bioreactor, inflow of treated water during the aeration to deposit the sludge with high concentration to go through the denitrification process, and the sludge with low concentration induces the formation of an upflow, and then re-aeration Reaction tank precipitation means; And Secondary sedimentation basin provided with a means for depositing and removing the cause material (BOD) and suspended matter (SS) contained in the treated water flowing over from the reaction tank settling means, and returning some of the treated water to the bioreactor High efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a. A partition wall for dividing the reaction space into equal portions is installed in the direction of flow of inflow water, and both ends of the partition wall are formed in a burst form to form a circulation flow path, and to form anaerobic, anaerobic, and aerobic conditions. A channel-type biological reactor for repeatedly performing aeration and non-aeration by adjusting the air injection time; It is provided from the side wall of the bioreactor to the separation wall, inflow of treated water during the aeration to deposit the sludge with high concentration to go through the denitrification process, and the sludge with a low concentration leads to the formation of an upflow Reaction tank precipitation means for performing reaeration; Horizontal circulating flow generating means installed in the partition wall reaction space of the bioreactor for generating horizontal circulating flow in the influent; And Secondary sedimentation basin provided with a means for depositing and removing the cause material (BOD) and suspended matter (SS) contained in the treated water flowing over from the reaction tank settling means, and returning some of the treated water to the bioreactor High efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a. The method according to claim 1 or 2, High efficiency sewage and wastewater treatment apparatus using a reaction tank precipitation apparatus, characterized in that the primary settling basin is installed at the front end of the bioreactor. The method of claim 1, High efficiency sewage and wastewater treatment apparatus using a reaction tank precipitation apparatus characterized in that the bioreactor is divided into anaerobic tank, anaerobic tank and aerobic tank. The method of claim 1, The reaction tank precipitation means An internal sedimentation basin which is partitioned from the bioreactor with the partition wall interposed therebetween, and flows the treated water through the sedimentation process by introducing the effluent after the aeration; A first anoxic tank provided at one side space of the internal sedimentation basin for carrying out a denitrification process of the nitrified sludge flowing out therefrom and at the same time returning some nitrified sludge to the salt water reaction tank; And A re-aeration tank provided in one side space of the internal sedimentation basin and partitioned with the primary anaerobic tank with a partition therebetween, and having a brower to re-aeration of the treated water flowing from the internal sedimentation basin. High efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a. The method of claim 2, The reaction tank precipitation means It is installed across the side wall and the separation wall of the bioreactor, the internal settler to inflow the treated water by inflow of the effluent in the abandonment in the bioreactor to perform the precipitation process; It is installed on one side of the internal settler, and provided with a brower for air injection to perform the re-aeration of the treated water flowing from the internal settler after the re-aeration tank to discharge to the secondary settling basin High efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a. The method of claim 5, wherein The internal sedimentation basin has a structure in which the bottom portion is recessed toward the center portion, and the high efficiency sewage and wastewater treatment apparatus using the reaction tank sedimentation device, characterized in that the rounded corners have a rounded shape to smooth the flow of the effluent. The method according to claim 5 or 7, An inlet pipe installed at a lower side of a wall forming a boundary between the internal settler and the bioreaction tank to introduce treated water that has undergone nitrification in the bioreactor; A vortex inducing wall disposed at least one upright in the circumferential tangential direction in the inner settler, and having a spiral shape to cause density flow and vortex flow; One side is located upright by a predetermined height from the bottom of the inner precipitator, a plurality of slits are formed to suck up the sludge with a higher concentration on the upright surface, the other side is the sludge outflow pipe penetrated by the first anaerobic tank; A nitrate sludge supply pipe installed through the lower part of the internal settler to supply the sludge abandoned in the bioreactor to the first anoxic tank; Efficient sewage and waste water treatment apparatus using a reaction tank sedimentation device is installed on the outlet side of the outlet pipe and includes a suction pump for sucking the sludge. The method of claim 8, A high efficiency sewage and wastewater treatment apparatus using a reaction tank precipitation apparatus further comprising a denitrification carbon supply device installed at a predetermined position of the inlet pipe to provide an appropriate amount of carbon organic matter required for the denitrification reaction. The method of claim 8, A rectifying plate installed at an upper portion of the inner settler and having a plurality of holes formed therein to allow outflow water to flow upward while swirling by a vortex guide wall; A solid-liquid separation inclined plate arranged to be inclined at a predetermined interval at a bottom of the rectifying plate to evenly disperse the rising flow having a low concentration, and to secure water flow stability of the precipitation space; One side is installed in the lower portion of the solid-liquid separation inclined plate, the other side is installed on the top of the rectifying plate inclined plate washing pipe for periodically cleaning the sludge that is likely to accumulate in the solid-liquid separation inclined plate to flow out; And Is installed in the upper part of the rectifying plate flows through the rectifying hole flows to guide the flow into the re-aeration tank by overflow High efficiency sewage and waste water treatment apparatus using a reaction tank precipitation apparatus comprising a. The method of claim 2, The reactor type precipitation means is a high efficiency sewage and wastewater treatment apparatus using a reaction tank precipitation apparatus, characterized in that installed in the water surface having a height of about 1/3 to 1/2 of the depth of the bioreactor. A first step of depositing activated sludge by a biological reaction by storing the influent introduced from the outside into a bioreactor and performing aeration; A second step of introducing the sludge during the aeration process in the bioreactor into the internal settler of the reactor type precipitation apparatus to precipitate the sludge having a high concentration, and float the treated water including the sludge having a low concentration; A third step of carrying out a denitrification process by introducing a sludge having a high concentration into a primary anoxic tank provided at one side of an internal sedimentation basin of the reaction tank precipitation apparatus and introducing some sludge in the aeration from the bioreactor; A fourth step of storing the treated water flowing from the internal sedimentation basin of the reaction tank sedimentation unit in a reaeration tank installed on one side of the internal sedimentation cell and performing reaeration; And The fifth step of flowing the treated water after aeration in the reaeration to precipitate the untreated raw material and suspended solids, and returning some of the sedimentation sludge to the bioreactor; High efficiency sewage and wastewater treatment method using a reaction tank precipitation apparatus comprising a. The method of claim 12, The second step is A sixth step in which the concentrated sludge group having a high concentration formed locally during the ascending flow through a spiral flow through the vortex guide wall forms a density flow and gathers at the center of the settling space; And Efficient sewage and wastewater treatment method using a reaction tank sedimentation device comprising a seventh step of rising after the concentration of solids separated through solid-liquid separation ramp plate. The method of claim 12, The third step is a high-efficiency sewage and wastewater treatment method using a reaction tank precipitation apparatus further comprises a sixth step of returning some denitrification sludge to the bioreactor to replenish the amount of microorganisms to go through the dephosphorization and denitrification process. The method of claim 12, A first step of removing nitrogen and phosphorus by making the anaerobic, anaerobic, and aerobic conditions by dividing the aeration and the aeration in each reaction space partitioned in the bioreactor by time periods; Sludge during the aeration process in the bioreactor is introduced into the internal settler of the reactor type precipitation device installed across the separation wall and the side wall of the bioreactor to precipitate the sludge of high concentration, and to raise the treated water including the sludge of low concentration. A second step of overflowing; A third step of storing the treated water flowing from the internal sedimentation basin of the reaction tank sedimentation unit in a reaeration tank installed on one side of the internal sedimentation cell to perform reaeration; And A fourth step of flowing the treated water after aeration in the reaeration to precipitate the untreated raw material and suspended solids, and returning some of the sedimentation sludge to the bioreactor; High efficiency sewage and wastewater treatment method using a reaction tank precipitation apparatus comprising a. The method of claim 15, The second step is A fifth step in which the concentrated sludge group having a high concentration formed locally during the ascending flow through the vortex guide wall as a spiral flow forms a dense flow and is collected at the center of the settling space; And Efficient sewage and wastewater treatment method using a reaction tank sedimentation apparatus comprising a sixth step of rising sludge is the flow of the sludge after the solid-liquid separation through the solid-liquid separation ramp plate flows into the re-aeration tank.

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