KR20050099811A - Advaned wastewater treatment system with electrolysis of sludge and sidestream - Google Patents

Abstract

The present invention relates to a high sewage wastewater treatment system using electrolysis of sludge and reflux water, and to electrolyze the return water and the return sludge consisting of a concentrate supernatant, a dehydrator desorbent, and the like to be introduced into a bioreactor.

To this end, the present invention includes a suspended solids removal tank, a bioreaction tank, a solid-liquid separation tank, and a sludge treatment tank, and electrolytic treatment of biological waste sludge generated in the solid-liquid separation tank and the return water generated in the sludge treatment tank together or separately. Nutrient in sewage treatment plant by providing advanced sewage treatment system using sludge and effluent electrolysis composed of first electrolysis tank or second electrolysis tank and third electrolysis tank which sends electrolyzed sludge and return water to biological reaction tank It can improve the removal efficiency and reduce the amount of biological waste sludge produced.

Description

Advanced wastewater treatment system with electrolysis of sludge and sidestream

The present invention relates to an advanced sewage treatment system capable of increasing sewage treatment efficiency by electrolyzing sludge and return water generated in the sludge treatment process of a sewage treatment plant, and more specifically, sludge and return generated in the sludge treatment process. The present invention relates to an advanced sewage treatment system using electrolysis of sludge and return water to electrolyze water to reduce the amount of biological waste sludge and to increase the efficiency of sewage treatment.

Generally, wastewater treatment process is divided into pretreatment, primary treatment, secondary treatment, advanced treatment, and sludge treatment process, and the secondary treatment process is mainly used as biological treatment process. And a rotating disc method, which initially started with a process for removing organic matter.

Recently, due to the problem of red tide in the sea due to eutrophication has been developed a biological nitrogen and phosphorus removal method. Bioreactors commonly used for nitrogen removal are Modified Ludzack-Ettinger (MLE) processes, and bioreactors used for simultaneous treatment of nitrogen and phosphorus are A2 / O (Anaerobic-Anoxic-Oxic) processes and various A2 / O variants. This is being utilized. In addition, various bottle-type methods, such as oxidation or sequencing batch reactor (SBR) method, are being developed.

Foreign A2 / O process variants include University of Cape Town (UCT), Bardenpho, PhoStrip, Virginia Initiative Plant (VIP), Osawa, Modified University of Cape Town (MUCT), Phase Isolation Ditch (PID), DeNiPho There is this. The media processes include Bioforr of Degremont, O.T.V., Biostyr, and the SBR series include Intermittent Cycle Extended Aeration System (ICEAS), Ominiflo SBR, Cyclic Activated Sludge System (CAS), and CAST.

A2 / O-based processes developed in Korea include DNR (Daewoo Nutrient Removal), NAP (Night Added Process), PungLim Industrial P / L-II, ACS (ASRT Control System), PADDO (Pre-anoxic, Anaerobic) And biological nutrient removal techniques including reflux-injected sludge denitrification tanks such as Anoxic-1, Anoxic-2, Oxic), HDF (Hanwha Dynamic Flow), DeN & P and Phase Isolation Intra Clarifier Ditches (PhICD).

The median A2 / O family includes CNR (cilium nutrient removal), SM (samsung media) process, NAP (nightsoil added process), SDPR (SK Denitrifying Phosphorus Removal), BioFor, HBR (hanmee bio reactor), HBR II, SPAD (sulfur particle autotrophic denitrification).

Membrane bioreactor (MBR) SYSTEM methods, such as Hyundai Advanced Nutrients Treatment (HANT) and Kolon Immersed Membrane Activated Sludge (KIMAS), are used.

SBR series includes Kumho & KIST intermittently Decanted Extended Aeration (MSIDE), MSBR, Taeyoung's TSBR and CSBR (Constant Sequencing Batch Reactors), AquaMSBR and Pumyang Sequencing Batch Reactors (PSBR).

B3 method using special microorganisms.

The above processes are processes for wastewater treatment bioreactors, and these bioreactors produce cells, that is, biological sludges, while microorganisms decompose organic materials, and process the sludges by concentration, digestion, and dehydration. The generation of reflux water consisting of concentrated tank symbol, digester supernatant, and desorption fluid is essential.

However, the generated water is sent to the inlet of the sewage treatment plant to increase the load of organic materials and nutrients in the wastewater treatment process. There is a large burden on the removal process.

The water quality of the return water is different depending on the process and conditions of the sewage treatment plant, but the fraction of the pollutant load of the sewage treatment plant is generally given in Table 1 below.

 Table 1 Percentage of Sewage Treatment Plant Influent Load (%) Item Thickener Digester Dehydrator Mixed return water Flow rate BODSSTNTP 0.685.1611.425.215.94 0.23 4.3716.4410.0011.40 0.300.873.325.424.94  1.2110.4031.2820.6322.28

As shown in Table 1, the flow load is about 1.2% of the influent, but the load of nutrients is about 20%, which places a heavy burden on the removal of biological nutrients.

In addition, recently, due to the international convention of the sea sludge of the sludge becomes difficult, the need for disposal of the sludge is increasing, and the treatment process by ozone and ultrasonic has been proposed as a method of reducing the generation of such sludge.

Therefore, the present invention has been made in order to solve the above problems, the object of the present invention is to electrolyze the return water and the return sludge consisting of a concentrate supernatant, dehydrator desorber and the like by flowing into the bioreactor. It is an object of the present invention to provide an advanced sewage treatment system using electrolysis of sludge and return water, which can improve the nutrient removal efficiency of the wastewater treatment plant and reduce the amount of biological waste sludge.

In order to achieve the above object, a first embodiment of the present invention comprises: a suspended solids removal tank composed of a combination of a screen, a fine screen, a drum screen, a sedimentation basin, etc. for removing suspended solids in an influent sewage; A biological reaction tank into which the effluent water of the suspended solids removal tank, the electrolyzed sludge / reflux water, and the biological waste sludge returned by solid-liquid removal are introduced to remove organic substances and nutrients; A solid-liquid separation tank such as an immersion membrane or a sedimentation basin for solid-liquid separation of microorganisms from the floating mixture liquid (MLSS) of the bioreactor to obtain biological waste sludge and final treated water; A sludge treatment tank for discharging the final sludge cake and the return water by treating the suspended solids removing process sludge and the biological waste sludge generated during the biological treatment process; Biological waste sludge generated in the solid-liquid separation tank and the countercurrent generated in the sludge treatment tank are electrolyzed together, and the sludge and the return electric water constituted by the first electrolysis tank which sends the electrolyzed sludge / counted water to the bioreactor. Provides an advanced sewage treatment system using decomposition.

In order to achieve the above object, a second embodiment of the present invention includes a suspended solids removal tank including a screen, a fine screen, a drum screen, a sedimentation basin, etc. for removing suspended solids in the influent sewage; A bioreactor for removing organic materials and nutrients by introducing the effluent water from the suspended solids removal tank, the electrolyzed sludge, the electrolyzed countercurrent and the solid waste separated by the return of solid-liquid; A solid-liquid separation tank such as an immersion membrane or a sedimentation basin for solid-liquid separation of microorganisms from the suspension mixture liquid (MLSS) of the bioreactor to obtain biological waste sludge and final treated water; A sludge treatment facility for treating the suspended sludge generated in the suspended solids removing tank and the biological waste sludge generated during the biological treatment and discharging the final sludge cake and the return water; A second electrolysis tank electrolyzing biological waste sludge generated in the biological treatment process and sending the electrolyzed sludge to the biological reaction tank; The present invention provides an advanced sewage water treatment system using a sludge and a countercurrent electrolysis composed of a third electrolysis tank configured to electrolyze the countercurrent generated in the sludge treatment tank to send the electrolyzed countercurrent to the biological reaction tank.

In order to achieve the above object, a third embodiment of the present invention includes a suspended solids removal tank including a combination of a screen, a fine screen, a drum screen, and a sedimentation basin for removing suspended solids in the influent sewage; A biological reaction tank into which the effluent water of the suspended material removal tank and the electrolyzed reflux water and the biological waste sludge returned by the solid-liquid flow are removed to remove organic substances and nutrients; A solid-liquid separation tank such as an immersion membrane or a sedimentation basin for solid-liquid separation of microorganisms from the suspension mixture liquid (MLSS) of the bioreactor to obtain biological waste sludge and final treated water; A second electrolysis tank electrolyzing the biological waste sludge generated in the biological treatment process and sending the electrolyzed sludge to the sludge treatment tank; A sludge treatment tank for discharging the sludge and the electrolyzed sludge generated from the suspended matter removal tank and discharging the final sludge cake and the return water; It provides an advanced sewage treatment system using a sludge and a semi-water electrolysis consisting of a third electrolysis tank to electrolyze the counter-current generated in the sludge treatment tank to send the electrolyzed counter-current to a biological reaction tank.

In the configuration of the first to third embodiments of the present invention, in particular, the biological reaction tank includes: a sludge anoxic tank for introducing electrolyzed sludge and return water and return sludge to reduce nitrate nitrogen in the sludge; An anaerobic tank in which a part of the effluent dividedly injected from the suspended substance removing tank and sludge introduced from the sludge anoxic tank meet together to remove organic substances and release phosphorus; An anoxic tank in which a portion of the effluent split from the suspended material removal tank and sludge introduced from the anaerobic tank and internal return sludge introduced from the aerobic tank meet together to remove organic substances and nitrogen; Untreated organic matter and ammonia in the sludge introduced from the anoxic tank is removed, it may be composed of an aerobic tank for discharging the suspended solids mixed solution in excess of phosphorus.

In particular, the electrode plate used in the process of removing organic substances and nutrients in the electrolysis tank applied to each embodiment of the present invention may be formed by coating the iridium coating on the titanium electrode plate made of any one of a plate, mesh, and cylindrical mesh. have.

The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the advanced wastewater treatment process of the present invention.

1 is a process example of the advanced sewage treatment system using the electrolysis of the sludge and the return water according to the first embodiment of the present invention, the first embodiment of the present invention is a suspended solids removal tank 10 and the biological reaction tank (20) ), The solid-liquid separation tank 30, the sludge treatment tank 40, and the sludge / counter water electrolysis tank 50, which is the first electrolysis tank, are used to electrolyze the sludge and the return water by the electrolysis tank. By supplying to an external carbon source, not only can the wastewater treatment efficiency be further improved, but also the sludge 155 generated in the biological reaction tank 20 and the return water 180 generated in the sludge treatment tank 40 are supplied. By electrolyzing together in one sludge / counter water electrolysis tank 50, it is possible to simplify the electrolysis device.

The suspended solids removal tank 10 is composed of a combination of a screen, a fine screen, a drum screen, a sedimentation basin and the like to precipitate and separate solid matter in the influent sewage 110 by screen or filtration to remove the suspended solids. Have

The biological reaction tank 20 is in the electrolyzed sludge / return water 190 and the solid-liquid separation tank 30 sent from the effluent 120 and the electrolysis tank 50 from the suspended solids removal tank 10 The biological waste sludge 150 to be returned is introduced and has a treatment process for removing organic substances and nutrients. Processes that can be used in the biological reaction tank 20, MLE process, A2 / O process, A2 / O series process using media, various modifications of A2 / O process, media process, oxidation or SBR process, process using membrane, The B3 method using a special microorganism may be used, and various processes listed below are processes applicable to the bioreactor of the present invention.

A2 / O series processes include biological nutrient removal (HS +) processes including reflux-injected sludge denitrification tanks such as DNR, NAP, P / L-II, ACS, PADDO, DASPro, HDF, and DeN & P. Process of A2 / O series using CNR, SM process, NAP, SDPR, BioFor, HBR, HBR II, SPAD method, etc., and variation of A2 / O process is UCT, Bardenpho, PhoStrip II, VIP, Osawa, MUCT, PID, DeNiPho, etc., Media process is Biofor, Biostr, etc., SBR series processes are ICEAS, Ominiflo SBR, CASS, CAST, KIDEA, MSBR, TSBR, CSBR, AquaMSBR, WECSBR, PSBR, etc. HANT, KIMAS, MBR system method can be used.

The solid-liquid separation tank 30 is composed of an immersion membrane or a sedimentation basin, and the biological waste sludge (150, 155, 160) and the final treated water (140) by solid-liquid separation of microorganisms from the floating mixture (MLSS) 130 of the biological reaction tank (20) ) Is obtained.

The sludge treatment tank 40 processes the final sludge cake 200 by treating the sludge removal process sludge 170 generated in the floating material removal tank 10 and the biological waste sludge 160 generated in the biological treatment process. It has a process of discharging the return water 180.

The sludge / counter water electrolysis tank 50, which is the first electrolysis tank, uses the biological waste sludge 155 generated in the solid-liquid separation tank 30 and the return water 180 generated in the sludge treatment tank 40. Electrolysis process together to send the electrolyzed sludge / return water 190 to the bioreactor 20. The organic material and nutrient removal process by this electrolysis treatment is decomposed by the direct oxidation method occurring in the electrode plate of the electrolysis tank and the indirect oxidation method by radicals generated in the electrode plate. Here, the electrolysis tank may use an open reactor having a free surface, and may be operated as a closed reactor without a free surface for introducing sludge into the tubular reactor under a constant pressure. In addition, the electrode plate used in the electrolytic bath may be a titanium electrode plate composed of any one of a plate, a mesh, a cylindrical mesh type, in order to prevent corrosion of the titanium substrate is preferably formed by coating the titanium electrode plate with iridium. In particular, the pole plate may be used in different forms depending on the type of sewage water to be treated. In the case of the plate type, the power consumption is high, but considering the treatment efficiency, it is preferable to be applied to the malignant wastewater treatment process, It would be desirable to be applied to low power processes. This electrolysis tank can be applied equally to the second and third embodiments exemplified below.

Figure 2 is another embodiment of the biological reactor of Figure 1, in particular, the biological reactor 20 applied to the first embodiment of the present invention is the Republic of Korea Patent No. 10-041721 by the applicant (the same inventor) Illustrates the state in which the reaction tank is configured in the order of sludge anoxic tank 60, anaerobic tank 70, anoxic tank 80, and aerobic tank 90 described in (Name: "biological nutrient removal apparatus including dehydrated water injection sludge denitrification tank") have.

The bioreactor of the Republic of Korea Patent Registration No. 10-0401721 is the injection of sludge denitrification tank without increasing the external carbon source such as reflux water consisting of concentrated tank supernatant, dehydrator desorber, etc. into the influent to increase the denitrification rate and improve the efficiency of nitrogen and phosphorus removal. As a result, the DNR (Daewoo Nutrient Removal) process, which adds sludge endothelial denitrification to the conventional A ₂ O (Anaerobic-Anoxic-Oxic) process, uses endogenous denitrification in a sludge denitrification tank, and has a low denitrification rate. The NAP (Nightsoil Added Process) process is designed to solve the problems such as the burden of an increase in the subsequent treatment tank by additional nitrogen and phosphorus injection.

In the bioreactor 20 of FIG. 2, the sludge anoxic tank 60 is sludge conveyed from the sludge / reflow water 190 electrolyzed together in the first electrolysis tank 50 and the solid-liquid separation tank 30. 150 flows in to reduce the nitrate nitrogen in the sludge.

The anaerobic tank 70 is a part of the effluent 120 dividedly injected from the floating material removal tank 10 and the sludge introduced from the sludge anaerobic tank 60 meet together to remove the organic material and discharge the phosphorus Have

The oxygen-free tank 80 is a portion of the effluent 120 divided into the floating material removal tank 10 and the sludge introduced from the anaerobic tank 70 and the internal transport sludge 210 introduced from the aerobic tank 90 together. Manna has a treatment process in which organic matter and nitrogen are removed.

The aerobic tank 90 has a treatment process in which untreated organic matter and ammonia in the sludge introduced from the anoxic tank 80 are removed, and the suspended solid mixture 130 in which phosphorus is excessively ingested is discharged.

3 is a process example of the advanced sewage treatment system using the electrolysis of the sludge and the return water according to the second embodiment of the present invention, the second embodiment of the present invention is a suspended solids removal tank 10 and the biological reaction tank (20) ) And the solid-liquid separation tank 30, the sludge treatment tank 40, and two second and third electrolysis tanks, that is, a sludge electrolysis tank 55 and a countercurrent electrolysis for electrolyzing sludge and the return water, respectively. It comprises the tank 57.

In particular, the second electrolysis tank sludge electrolysis tank 55 electrolyzes the biological waste sludge 155 generated in the biological treatment process to transfer the electrolyzed sludge 191 to the biological reaction tank 20. And the third electrolysis tank, which is the third electrolysis tank 57, electrolyzes the countercurrent 180 generated in the sludge treatment tank 40 to electrolyze the counter-water 195, which is electrolyzed. 20).

Therefore, the biological reaction tank 20 is a biological waste sludge 150 that is returned from the effluent 120 and the solid-liquid separation of the suspended solids removal tank, and each of the electrolyzed sludge 191 and the electrolyzed return water (195) Inflow.

In this process, the sludge 155 generated in the biological treatment process and the return water 180 generated in the sludge treatment tank 40 are electrolyzed by using different electrolysis tanks 55 and 57, respectively. It is advantageous in that it can optimize the conditions at the time of and the countercurrent electrolysis.

Figure 4 is another embodiment of the biological reactor of Figure 3, in particular the sludge anaerobic tank 60 of the Republic of Korea Patent Registration No. 10-041721 that the biological reactor 20 applied to the second embodiment of the present invention mentioned above And an anaerobic tank 70, an anaerobic tank 80 and an aerobic tank 90 in the order of the reaction tank is illustrated.

5 is a process example of a high sewage wastewater treatment system using the electrolysis of sludge and the return water according to the third embodiment of the present invention, the third embodiment of the present invention is particularly the second electrolysis in the configuration of the second embodiment The installation position of the joining sludge electrolysis tank 55 is configured differently.

Here, in particular, the second electrolysis tank sludge electrolysis tank 55 electrolyzes the biological waste sludge 160 generated in the biological treatment process to convert the electrolyzed sludge 191 into the sludge treatment tank 40. The third electrolysis tank 57 electrolyzes the countercurrent 180 generated in the sludge treatment tank 40 to electrolyze the countercurrent water 195 electrolyzed by the bioreactor 20. Send to).

Therefore, the biological reaction tank 20 is introduced into the biological waste sludge 150 and the third electrolysis tank 57, which is returned from the effluent 120 and the solid-liquid separation of the suspended solids removal tank 195 is introduced. .

In this process, the sludge 155 generated in the biological treatment process and the return water 1780 generated in the sludge treatment tank 40 are electrolyzed by using different electrolysis tanks 55 and 57, respectively. In addition, there is an advantage in that the conditions at the time of the electrolyzed water can be optimized, and the electrolyzed sludge 191 is not sent to the bioreactor, but is sent to the sludge treatment tank 40, whereby the existing bioreactor 20 It is advantageous in that it is possible to maximize the reduction of waste sludge by injecting the strong voltage avoided due to the burden that had to be sent to the electrolysis device.

Figure 6 is another embodiment of the biological reactor of Figure 5, in particular the sludge anaerobic tank 60 of the Republic of Korea Patent Registration No. 10-041721 that the biological reactor 20 applied to the third embodiment of the present invention mentioned above And an anaerobic tank 70, an anaerobic tank 80 and an aerobic tank 90 in the order of the reaction tank is illustrated.

Referring to each processing step for each embodiment of the present invention configured as described above are as follows.

First, in the first embodiment, the suspended solids removal tank 10 removes suspended solids in the influent sewage 110 through a suspended solids removal process consisting of a combination of a screen, a fine screen, a drum screen, a sedimentation basin, and the like. ) Is sent to the biological reactor (20).

Next, in the bioreactor 20, the effluent 120 from the suspended material removal process and the sludge / reflux water 190 electrolytically treated and the return sludge 150 returned after solid-liquid separation are introduced into the bar as illustrated above. By removing the organic substances and nutrients through the same biological treatment process, the suspended solids mixture 130 is discharged.

In particular, when the biological reaction tank 20 is configured as shown in FIG. 2, the electrolyzed sludge / reflux water 190 and the return sludge 150 of the solid-liquid separation process are introduced into the sludge anoxic tank 60 and the nitric acid in the sludge. Nitrogen is reduced, and then, in the anaerobic tank 70, a part of the effluent 120 split from the suspended material removing process and sludge from the sludge anoxic tank 60 are introduced to remove organic substances and phosphorus is released. In addition, the oxygen-free tank 80 is a part of the effluent 120 and the sludge coming from the anaerobic tank 70 and the internal conveying sludge 210 introduced from the aerobic tank (90) is introduced together in this place Organic matter and nitrogen are removed. Thereafter, the aerobic tank 90 may remove the untreated organic matter and ammonia in the sludge introduced from the anoxic tank 80 and discharge the suspended solid mixture 130 in which phosphorus is excessively ingested.

In this biological treatment process, the external carbon source such as the semi-condensate consisting of the supernatant of the condensate and the dehydrator is added to the sludge denitrification tank to increase the denitrification rate. In addition, since the sludge and the countercurrent water are electrolyzed by electrolysis and supplied to an external carbon source, the efficiency can be further improved.

On the other hand, in the solid-liquid separation tank 30 by separating the suspended solids mixed solution 130 from the biological reaction tank 20 through a separation membrane or a sedimentation basin to separate the microorganism and the symbolic water, biological waste sludge (150, 155, 160) and the final Treated water 140 is discharged.

Next, in the sludge treatment tank 40, biological waste sludge (150, 155, 160), which is a primary sludge generated in the suspended solids removal process, is a secondary sludge generated in a bioreaction process or a solid-liquid separation process. ) To discharge the return water 180 together with the final sludge cake 200.

Finally, in the first electrolysis tank 50, in the direct oxidation method or the electrode plate produced by the electrolysis of the sludge 155 of the biological treatment process and the return water 180 generated in the sludge treatment process together. Indirect oxidation by generated radicals decomposes organic substances and nutrients, thereby allowing the electrolyzed sludge / counter water 190 to be sent to the bioreactor 20.

Next, in the second embodiment, the biological reaction tank 20, the sludge 191 and the return water 195 electrolyzed by the effluent 120 and the respective electrolysis tanks 55 and 57 from the suspended matter removal process. ) And the return sludge 150 conveyed after separation of the solid and liquid is introduced to remove the organic matter and nutrients through the biological treatment process as exemplified above to discharge the suspended solid mixture 130.

In the two electrolysis tanks 55 and 57, the sludge 155 of the biological treatment process and the return water 180 of the sludge treatment process are electrolyzed, respectively. Decomposition of organic substances and nutrients by indirect oxidation by the, it is possible to send the electrolyzed sludge 191 and the return water 195 to the bioreactor 20, respectively.

Finally, in the case of the third embodiment, the biological reaction tank 20 flows in the outflow water 120 from the suspended solids removal process and the return water (195) treated with the electrolysis and the return sludge 150 which is returned after the solid-liquid separation Through the biological treatment process as exemplified above to remove the organic substances and nutrients to discharge the suspended solids mixed solution (130).

In the sludge treatment tank 40, the first sludge generated in the suspended solids removing process is generated in the sludge 170 and the biological reaction process or the solid-liquid separation process, which is the primary sludge. The decomposed sludge 191 is treated to discharge the return water 180 together with the final sludge cake 200.

In the second electrolysis tank 55, the sludge 160 separated from the solid-liquid separation is first electrolyzed to discharge the electrolyzed sludge 191 to the sludge treatment tank 40, and the third electrolysis tank. In (57), by electrolyzing the counter-flow water 180 generated in the sludge treatment process, the organic material and nutrients are decomposed by direct oxidation by the direct oxidation method occurring in the electrode plate or indirect oxidation by radicals generated in the electrode plate, thereby performing electrolysis. Returned water 195 can be sent to the bioreactor 20.

According to the present invention, by treating the sludge generated in the sludge treatment process of the sewage treatment plant through an electrolysis tank, the amount of sludge generated in the sewage treatment plant can be reduced, and the return water generated in the sludge treatment process By treating the organic materials and nutrients by decomposing, it is possible to increase the treatment efficiency of the sewage treatment plant, and especially in the sewage treatment plants with relatively high nutrients and low organic substances, the sludge and the return water which are electrolyzed as in the present invention are externally discharged. By using it as a carbon source, it is possible to increase the utilization of the return water in sewage treatment plants.

1 is a process example of the advanced sewage treatment system using the electrolysis of the sludge and the return water according to the first embodiment of the present invention

Figure 2 is another embodiment of the biological reactor of Figure 1

3 is a process example of the advanced sewage treatment system using the electrolysis of the sludge and the return water according to the second embodiment of the present invention

4 is another embodiment of the biological reactor of FIG.

5 is a process example of the advanced sewage treatment system using the electrolysis of the sludge and the return water according to the third embodiment of the present invention

6 is another embodiment of the biological reactor of FIG.

<Description of the symbols for the main parts of the drawings>

10: floating material removal tank 20: bioreactor

30: solid-liquid separation tank 40: sludge treatment tank

50: sludge / return water electrolysis tank 55: sludge electrolysis tank

57: countercurrent electrolysis tank 60: sludge anoxic tank

70: anaerobic tank 80: anaerobic tank

90: aerobic tank 110: influent

120: effluent from the suspended solids removal process 130: suspended solids (MLSS)

140: final treated water 150,155,160: biological waste sludge

170: suspended solids removal process sludge 180: return water

190: electrolyzed sludge / reflux 191: electrolyzed sludge

195: electrolyzed backwater 200: sludge cake

210: internal conveying sludge

Claims (8)

A suspended solids removal tank 10 composed of a combination of a screen, a fine screen, a drum screen, a sedimentation basin, etc. for removing suspended solids in the inflow sewage 110; A biological reaction tank 20 into which the effluent water 120 of the floating material removal tank and the electrolyzed sludge / reflux water 190 and the biological waste sludge 150 which are separated and returned to the solid-liquid are introduced to remove organic substances and nutrients; A solid-liquid separation tank 30 such as an immersion membrane or a sedimentation basin which obtains biological waste sludge (150, 155, 160) and final treated water 140 by solid-liquid separation of microorganisms from the floating mixture (MLSS) 130 of the bioreactor; By treating the suspended material removal process sludge 170 and the biological waste sludge 160 generated in the biological treatment process generated in the floating material removal tank 10 to discharge the final sludge cake 200 and the return water 180 A sludge treatment tank 40; The biological waste sludge 155 generated in the solid-liquid separation tank and the reaction water 180 generated in the sludge treatment tank 40 are electrolyzed together to treat the electrolyzed sludge / counter water 190 as a biological reaction tank 20. Advanced wastewater treatment system using sludge and return water electrolysis, characterized in that the first electrolysis tank (50) sent to). The method of claim 1, wherein the biological reactor 20, Sludge anaerobic tank 60 for introducing sludge / reflow water 190 electrolyzed together in the first electrolysis tank 50 and sludge 150 conveyed from the solid-liquid separation tank to reduce nitrate nitrogen in the sludge; ; An anaerobic tank 70 in which a part of the effluent 120 dividedly injected from the suspended matter removing tank and sludge introduced from the sludge anoxic tank 60 meet together to remove organic substances and release phosphorus; Part of the effluent 120 dividedly injected from the floating material removal tank and the sludge introduced from the anaerobic tank 70 and the internal transport sludge 210 introduced from the aerobic tank meet together to remove organic substances and nitrogen (80) and; Sludge and reflux water, characterized in that consisting of an aerobic tank 90 to remove the untreated organic material and ammonia in the sludge introduced from the anoxic tank 80, and discharge the suspended solids mixture solution 130 in excess of phosphorus Advanced sewage treatment system using decomposition. A suspended solids removal tank 10 composed of a combination of a screen, a fine screen, a drum screen, a sedimentation basin, etc. for removing suspended solids in the inflow sewage 110; The effluent water 120 of the floating material removal tank and the electrolyzed sludge 191 and the electrolyzed return water 195 and the biological waste sludge 150 which are separated and returned to the solid-liquid are introduced to remove organic substances and nutrients. A bioreactor 20; A solid-liquid separation tank 30 such as an immersion membrane or a sedimentation basin which obtains biological waste sludge (150, 155, 160) and the final treated water 140 by solid-liquid separation of microorganisms from the floating mixture (MLSS) 130 of the bioreactor; Treating the suspended material removal process sludge 170 and biological waste sludge 160 generated in the biological treatment process and discharge the final sludge cake 200 and the return water 180 generated in the floating material removal tank 10. A sludge treatment tank 40; A second electrolysis tank 55 which electrolyzes the biological waste sludge 155 generated in the biological treatment process and sends the electrolyzed sludge 191 to the biological reaction tank 20; Electrolytic treatment of the counter-flow water 180 generated in the sludge treatment tank 40 to the electrolytic reaction water (195) is composed of a third electrolysis tank (57) for sending to the biological reaction tank (20) Advanced sewage treatment system using sludge and return water electrolysis. The biological reactor 20 according to claim 3, The sludge 191 electrolyzed in the second electrolysis tank 55, the return water 195 electrolyzed in the third electrolysis tank 57, and the sludge 150 conveyed from the solid-liquid separation tank are introduced. A sludge anaerobic bath 60 to reduce nitrate nitrogen in the sludge; An anaerobic tank 70 in which a part of the effluent 120 dividedly injected from the suspended matter removing tank and sludge introduced from the sludge anoxic tank 60 meet together to remove organic substances and release phosphorus; Part of the effluent 120 dividedly injected from the floating material removal tank and the sludge introduced from the anaerobic tank 70 and the internal transport sludge 210 introduced from the aerobic tank meet together to remove organic substances and nitrogen (80) and; Sludge and reflux water, characterized in that consisting of an aerobic tank 90 to remove the untreated organic material and ammonia in the sludge introduced from the anoxic tank 80, and discharge the suspended solids mixture solution 130 in excess of phosphorus Advanced sewage treatment system using decomposition. A suspended solids removal tank 10 composed of a combination of a screen, a fine screen, a drum screen, a sedimentation basin, etc. for removing suspended solids in the inflow sewage 110; A biological reaction tank 20 into which the effluent water 120 of the floating material removal tank and the electrolyzed reflux water 195 and the biological waste sludge 150 returned by the solid-liquid separation are introduced to remove organic substances and nutrients; A solid-liquid separation tank 30 such as an immersion membrane or a sedimentation basin for solid-liquid separation of microorganisms from the floating mixture liquid (MLSS) 130 of the bioreactor to obtain biological waste sludge (150,160) and the final treated water (140); A second electrolysis tank 55 which electrolyzes the biological waste sludge 160 generated in the biological treatment process and sends the electrolyzed sludge 191 to the sludge treatment tank 40; Sludge treatment tank for discharging the final sludge cake 200 and the return water 180 by treating the floating material removal process sludge 170 and the electrolyzed sludge 191 generated in the floating material removal tank 10 ( 40); It characterized by consisting of a third electrolysis tank 57 to electrolyze the return water (180) generated in the sludge treatment tank 40 to send the electrolyzed return water (195) to the biological reaction tank (20). Advanced sewage treatment system using sludge and return water electrolysis. The biological reactor 20 according to claim 5, A sludge anoxic tank (60) for reducing the nitrate nitrogen in the sludge by introducing the counter-flow water (195) electrolyzed in the third electrolysis tank (57) and sludge (150) conveyed from the solid-liquid separation tank; An anaerobic tank 70 in which a part of the effluent 120 dividedly injected from the suspended matter removing tank and sludge introduced from the sludge anoxic tank 60 meet together to remove organic substances and release phosphorus; Part of the effluent 120 dividedly injected from the floating material removal tank and the sludge introduced from the anaerobic tank 70 and the internal transport sludge 210 introduced from the aerobic tank meet together to remove organic substances and nitrogen (80) and; Sludge and reflux water, characterized in that consisting of an aerobic tank 90 to remove the untreated organic material and ammonia in the sludge introduced from the anoxic tank 80, and discharge the suspended solids mixture solution 130 in excess of phosphorus Advanced sewage treatment system using decomposition. The method according to any one of claims 1 or 3 or 5, The electrode plate used in the electrolysis tank is a high sewage and wastewater treatment system using sludge and reflux electrolysis, characterized in that consisting of any one of plate, mesh, cylindrical. 8. The advanced sewage treatment system using sludge and reflux electrolysis according to claim 7, wherein the electrode plate used in the electrolysis tank is formed by coating iridium on titanium.