WO2001070636A1 - Sewage and wastewater disposal system - Google Patents

Sewage and wastewater disposal system Download PDF

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Publication number
WO2001070636A1
WO2001070636A1 PCT/KR2001/000449 KR0100449W WO0170636A1 WO 2001070636 A1 WO2001070636 A1 WO 2001070636A1 KR 0100449 W KR0100449 W KR 0100449W WO 0170636 A1 WO0170636 A1 WO 0170636A1
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WO
WIPO (PCT)
Prior art keywords
tank
wastewater
aeration
aeration tank
oxygen
Prior art date
Application number
PCT/KR2001/000449
Other languages
French (fr)
Inventor
Woon Chang Kim
Original Assignee
Woon Chang Kim
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Woon Chang Kim filed Critical Woon Chang Kim
Priority to AU44767/01A priority Critical patent/AU4476701A/en
Publication of WO2001070636A1 publication Critical patent/WO2001070636A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/121—Multistep treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/12—Prevention of foaming
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a sewage and wastewater disposal system and more particularly, to an improved biological method of sewage and wastewater disposal system.
  • wastewater contaminated with organic materials e.g., from domestic and industrial sources is chemically treated prior to being discharged into a natural water system.
  • an object of the invention to provide a biological wastewater disposal system having effective disposal performance of organic materials and nutrient salts including nitrogen and phosphorous by supplying an anaerobic tank and an anoxic tank with the conventional wastewater disposal system. It is another object of the invention to provide a biological wastewater disposal system capable of being constructed in a reduced area by combining an anaerobic tank, an anoxic tank, an aeration tank and a sedimentation tank therein into a single structure.
  • a wastewater disposal system comprising an aeration tank 10 having an re-aeration tank 11 on top thereof for treating the wastewater supplied into the body thereof by microorganisms and oxygen; an anaerobic tank 20 located at one side of the aeration tank 10 for mixing the wastewater introduced through a wastewater inlet tube 21 with the recycled sludge and discharging phosphorous components from the mixed wastewater; a first anoxic tank 30 disposed at the other side of the anaerobic tank 10 for mixing the wastewater of phosphorous discharging with the recycled aeration water of nitrification for denitrification; second anoxic tank 40 for removing the nitrate nitrogen contained in the wastewater within the aeration tank 10 by endogenous respiration of microorganisms; pure oxygen generator 70 located at a bottom of the aeration tank 10 for supplying the oxygen to be consumed by the oxidation and nitrification of the organic materials when the wastewater is supplied into the aeration
  • the anaerobic tank 20 the anoxic tank 50, the aeration tank 10 and the sedimentation tank 90 are combined in a single structure, the space for the whole system is reduced. Furthermore, since the anoxic tank 50 and the anaerobic tank 20 are positioned outside the aeration tank 10 in order to remove the nutrient salts, the whole system is organically operable.
  • FIG. 1 is a schematic view of the wastewater disposal system of the present invention
  • FIG. 2 is a flow chart of the system of the invention
  • FIG. 3 is a front view of the system of the present invention
  • FIG. 4 is an enlarged plane view of the system of the invention
  • FIG. 5 is a schematic plan view of the system of the invention.
  • an anaerobic tank 20 and an anoxic tank 50 are located outside an aeration tank 10 with a predetermined space.
  • the anaerobic tank 20 is located outside the aeration tank 10 and serves to mix the wastewater introduced into the anaerobic tank 20 through a wastewater inlet tube 21 with the recycled sludge to discharge phosphorous from the wastewater.
  • the anaerobic tank 20 further serves to mix well the wastewater with the recycled sludge re-introduced from the below-mentioned sedimentation 90 into the aerobic tank 20 through a recycling pump 100.
  • a underwater mixer 300 is used.
  • discharging phosphorous from the wastewater by microorganisms is an important point. It is preferable to use DO (dissolved oxygen) meter and measure the dissolved oxygen concentration at any time since the present invention is operated at approximately a minimum of the DO (dissolved oxygen) concentration.
  • the phosphorous discharged wastewater is delivered from the anaerobic tank 20 to a first anoxic tank 30.
  • the first anoxic tank 30 is located at the other side of the anaerobic tank 20 and serves to denitrification by organic materials.
  • the underwater mixer 300 is also used in order to mix well the wastewater.
  • the nitrate nitrogen is reduced as nitrogen gas, collected in a upper portion thereof and then discharged to the atmosphere.
  • the wastewater is delivered to a lower portion of an aeration tank 10 through a transfer pump 60.
  • the wastewater is treated by microorganisms and oxygen contained in the wastewater within the aeration tank 10. Simultaneously, luxury uptake results in removal of phosphorous.
  • a pure oxygen generator 70 is located at a lower portion of the aeration tank 10 and serves to supply the oxygen to be consumed on oxidation and nitrification of organic materials when the wastewater is delivered to the aeration tank 10 through the transfer pump 60. That is, the pure oxygen generator 70 supplies pure oxygen to be consumed on oxidation and nitrification of organic materials in the wastewater introduced into the aeration tank 10, thereby improving a disposal performance of the wastewater.
  • An air compressor 80 is located at a lower portion of the aeration tank 10, supplies air to a diffuser 81 for diffusing compressed air into the wastewater within the aeration tank 10 when oxygen is supplied from the pure oxygen generator 70.
  • ammonia nitrogen is combined with oxygen by microorganisms and oxidized to the nitrate nitrogen.
  • nitrogen components NO 3
  • N 2 nitrogen gas
  • the nitrogen gas is collected at the upper portion of the anoxic tank 50 and discharged to the atmosphere through a nitrogen gas discharge tube.
  • the aeration tank 10 includes the pure oxygen generator 70 and the air compressor 80 at the lower portion thereof in order to oxidize the organic materials by microorganisms and oxygen and remove the phosphorous by luxury uptake from the wastewater, so that the present invention facilitates the contact of the organic materials with microorganisms, compared to the conventional biological wastewater disposal system, thereby improving the disposal performance of the wastewater.
  • the wastewater in the aeration tank 10 is delivered to a second anoxic tank 40.
  • the second anoxic tank 40 serves to remove the nitrate nitrogen contained in the aeration tank 10 by endogenous respiration of microorganisms and mixes well the wastewater by using the underwater mixer 300. That is, the second anoxic tank 40 removes the remained nitrate nitrogen, delivers the wastewater to a reaeration tank 11 at the upper portion of the aeration tank 10 through the transfer pump 60 in order to reaerate the same.
  • the reaeration tank 11 has a sedimentation tank 90 including a scum outlet 91 and a clarified water outlet 92 for removing the nitrate nitrogen remaining in the wastewater introduced from the second anoxic tank 40 and reaerating in the reaeration tank 11, thereby preventing the sludge from floating by denitrification and the phosphorous from redischarging.
  • the wastewater is separated solid from liquid in the sedimentation tank 90 to be clarified supernatant liquid, and the liquid is discharged through the clarified water outlet 92 or delivered to the next process, whereas the solid containing phosphorous is discharged through the sludge discharge tube 93 in order to remove the phosphorous from the wastewater.
  • the wastewater is removed by a baffle 94, a skimmer 95 and a scraper 96 and controlled in quantity of the wasted sludge.
  • the wastewater maintains the optimum concentration of microorganisms in the aeration tank 10, the anoxic tank 50 and the anaerobic tank 20.
  • a recycling pump 100 is located outside the sedimentation tank 90 for selectively delivering the solid sludge at the bottom of the sedimentation tank 90 to the anoxic tank 50 or to the anaerobic tank 20 in order to remove the nutrient salts.
  • the wastewater disposal system in accordance with the invention supplies the anaerobic tank 20 and anoxic tank 50 with the wastewater disposal system in a single structure, so that the organic materials and nutrient salts including nitrate nitrogen and phosphorous can be treated more effectively than the conventional wastewater disposal system.
  • organic materials in the wastewater are effectively treated in the aeration tank 10, since due to deep depth of water of the aeration tank 10, high propagation rates of oxygen and usage of pure oxygen make removal of the organic materials and deposition of the sludge excellent.
  • Phosphorous is removed by discharging phosphorous in the anaerobic tank 20 by characteristic of microorganisms e.g., luxury uptake in the aeration tank 10 and finally discharged by dumping the sludge. Again, nitrogen is removed such that microorganisms in the aeration tank
  • nitrate the nitrogen and the nitrate nitrogen is reduced as nitrogen gas in the first anoxic tank 30, and then discharged to the atmosphere.
  • the remaining nitrated is removed in the second anoxic tank 40 by endogenous denitrification and re-aerated to prevent the sludge from floating on a surface of the wastewater and the phosphorous from re-discharging in the sedimentation tank 90.
  • the present invention effectively treats the organic materials and nutrient salts in the wastewater, thereby improving the reliability of the products and the convenience of operation.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

A sewage and wastewater disposal system includes an aeration tank (10) having a reaeration tank (11) on top thereof; an anaerobic tank (20) located at one side of the aeration tank (10) for mixing the wastewater introduced through a wastewater inlet tube (21) with the recycled sludge and discharging phosphorous from the wastewater; a first anoxic tank (30) for denitrification; a second anoxic tank (40) for removing the nitrate nitrogen; a pure oxygen generator (70) for supplying the oxygen; an air compressor (80) having a diffuser (81); a sedimentation tank (90) located outside the reaeration tank (11) having a scum outlet (91) and a clarified water outlet (92); and a recycling pump (100) located outside the aeration tank (10). The wastewater disposal system is capable of being constructed in a reduced area by combining the anaerobic tank (20), the aeration tank (10) and the sedimentation tank (90) therein into a single structure and maximizing utility of oxygen by water depth to be 15-20 m and reducing the power thereof.

Description

SEWAGE AND WASTEWATER DISPOSAL SYSTEM
TECHNICAL FIELD
The present invention relates to a sewage and wastewater disposal system and more particularly, to an improved biological method of sewage and wastewater disposal system.
BACKGROUND ART
Conventionally, wastewater contaminated with organic materials, e.g., from domestic and industrial sources is chemically treated prior to being discharged into a natural water system.
Recently, a biological disposal of wastewater by aeration is used in removing the organic materials from the wastewater.
In the biological wastewater disposal system, as described in U. S. Pat No. 4,192,740, there are two types of aerating methods, an open-air type and a closed type. In the open-air type aeration method, activated sludge from the sedimentation tank and the wastewater are mixed with the air in an open-air aeration tank. In the closed type aeration method, activated sludge and the wastewater are mixed with oxygen in a closed aeration tank. Besides, various proposals have been made to modify the conventional disposal system to increase the rates of oxygen dissolution and utility and to improve the disposal efficiency, for example modifications described in Korean Pat. Nos. 126422 and 220189.
In such conventional disposal, since the aeration and sedimentation tanks are separately constructed on the ground, it requires a large area to accommodate the whole system. And the depth of water is set at 4-6 m, so that low utility of air makes it uneconomical to operate it. Therefore, it is less efficient removal of organic materials and nutrient salts including nitrogen and phosphorous.
DISCLOSURE OF INVENTION
It is, therefore, an object of the invention to provide a biological wastewater disposal system having effective disposal performance of organic materials and nutrient salts including nitrogen and phosphorous by supplying an anaerobic tank and an anoxic tank with the conventional wastewater disposal system. It is another object of the invention to provide a biological wastewater disposal system capable of being constructed in a reduced area by combining an anaerobic tank, an anoxic tank, an aeration tank and a sedimentation tank therein into a single structure.
It is still another object of the invention to provide a biological wastewater disposal system capable of maximizing the utility of oxygen.
It is a further object of the invention to provide a biological wastewater disposal system capable of reducing the power thereof.
It is a still further object of the invention to provide a biological wastewater disposal system capable of organically driving the whole system, due to an anoxic tank and an anaerobic tank disposed outside the aeration tank.
The above and other objects of the invention are accomplished by providing a wastewater disposal system comprising an aeration tank 10 having an re-aeration tank 11 on top thereof for treating the wastewater supplied into the body thereof by microorganisms and oxygen; an anaerobic tank 20 located at one side of the aeration tank 10 for mixing the wastewater introduced through a wastewater inlet tube 21 with the recycled sludge and discharging phosphorous components from the mixed wastewater; a first anoxic tank 30 disposed at the other side of the anaerobic tank 10 for mixing the wastewater of phosphorous discharging with the recycled aeration water of nitrification for denitrification; second anoxic tank 40 for removing the nitrate nitrogen contained in the wastewater within the aeration tank 10 by endogenous respiration of microorganisms; pure oxygen generator 70 located at a bottom of the aeration tank 10 for supplying the oxygen to be consumed by the oxidation and nitrification of the organic materials when the wastewater is supplied into the aeration tank 10; air compressor 80 having a diffuser 81 built at a lower portion of the aeration tank 10 for supplying compressed air to the wastewater within the aeration tank 10 to agitate the wastewater when oxygen from the pure oxygen generator 70 is supplied into the aeration tank 10; sedimentation tank 90 located outside the re-aeration tank 11 of the aeration tank 10 having a scum outlet 91 and a clarified water outlet 92 for removing the nitrate nitrogen contained in the wastewater introduced into the sedimentation tank 90 from the second anoxic tank 40, reaerating the same, so that it prevents the sludge from floating on a surface of the wastewater and the phosphorous from re-discharging; and a recycling pump 100 located outside the aeration tank 10 for selectively delivering the sludge to the anoxic tank 50 or the anaerobic tank 20 to remove the nutrient salts from the wastewater, the sludge contained at the bottom of the sedimentation tank after solid and liquid separating in the sedimentation tank 90.
Because the anaerobic tank 20, the anoxic tank 50, the aeration tank 10 and the sedimentation tank 90 are combined in a single structure, the space for the whole system is reduced. Furthermore, since the anoxic tank 50 and the anaerobic tank 20 are positioned outside the aeration tank 10 in order to remove the nutrient salts, the whole system is organically operable.
Accordingly, disposal efficiency is maximized, thereby improving the reliability of products and the convenience of operation.
BRIEF DESCRIPTION OF DRAWINGS
The above and other objects and features of the instant invention will become apparent from the following description of preferred embodiments taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic view of the wastewater disposal system of the present invention;
FIG. 2 is a flow chart of the system of the invention; FIG. 3 is a front view of the system of the present invention; and FIG. 4 is an enlarged plane view of the system of the invention. FIG. 5 is a schematic plan view of the system of the invention.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIGS. 1 to 5, an anaerobic tank 20 and an anoxic tank 50 are located outside an aeration tank 10 with a predetermined space.
The anaerobic tank 20 is located outside the aeration tank 10 and serves to mix the wastewater introduced into the anaerobic tank 20 through a wastewater inlet tube 21 with the recycled sludge to discharge phosphorous from the wastewater.
The anaerobic tank 20 further serves to mix well the wastewater with the recycled sludge re-introduced from the below-mentioned sedimentation 90 into the aerobic tank 20 through a recycling pump 100. For this purpose, a underwater mixer 300 is used. In this step, discharging phosphorous from the wastewater by microorganisms is an important point. It is preferable to use DO (dissolved oxygen) meter and measure the dissolved oxygen concentration at any time since the present invention is operated at approximately a minimum of the DO (dissolved oxygen) concentration.
The phosphorous discharged wastewater is delivered from the anaerobic tank 20 to a first anoxic tank 30. The first anoxic tank 30 is located at the other side of the anaerobic tank 20 and serves to denitrification by organic materials. At this time, the underwater mixer 300 is also used in order to mix well the wastewater. In the first anoxic tank 30, the nitrate nitrogen is reduced as nitrogen gas, collected in a upper portion thereof and then discharged to the atmosphere.
After denitrification, the wastewater is delivered to a lower portion of an aeration tank 10 through a transfer pump 60.
In the aeration tank 10 having a reaeration tank 11 on top thereof, the wastewater is treated by microorganisms and oxygen contained in the wastewater within the aeration tank 10. Simultaneously, luxury uptake results in removal of phosphorous.
A pure oxygen generator 70 is located at a lower portion of the aeration tank 10 and serves to supply the oxygen to be consumed on oxidation and nitrification of organic materials when the wastewater is delivered to the aeration tank 10 through the transfer pump 60. That is, the pure oxygen generator 70 supplies pure oxygen to be consumed on oxidation and nitrification of organic materials in the wastewater introduced into the aeration tank 10, thereby improving a disposal performance of the wastewater. An air compressor 80 is located at a lower portion of the aeration tank 10, supplies air to a diffuser 81 for diffusing compressed air into the wastewater within the aeration tank 10 when oxygen is supplied from the pure oxygen generator 70.
On the other hand, ammonia nitrogen is combined with oxygen by microorganisms and oxidized to the nitrate nitrogen. In the aeration tank 10, nitrogen components (NO3) is oxidized, circulates to the first anoxic tank 30 and is reduced to nitrogen gas (N2). The nitrogen gas is collected at the upper portion of the anoxic tank 50 and discharged to the atmosphere through a nitrogen gas discharge tube.
In other words, the aeration tank 10 includes the pure oxygen generator 70 and the air compressor 80 at the lower portion thereof in order to oxidize the organic materials by microorganisms and oxygen and remove the phosphorous by luxury uptake from the wastewater, so that the present invention facilitates the contact of the organic materials with microorganisms, compared to the conventional biological wastewater disposal system, thereby improving the disposal performance of the wastewater.
In due sequence, the wastewater in the aeration tank 10 is delivered to a second anoxic tank 40. The second anoxic tank 40 serves to remove the nitrate nitrogen contained in the aeration tank 10 by endogenous respiration of microorganisms and mixes well the wastewater by using the underwater mixer 300. That is, the second anoxic tank 40 removes the remained nitrate nitrogen, delivers the wastewater to a reaeration tank 11 at the upper portion of the aeration tank 10 through the transfer pump 60 in order to reaerate the same.
The reaeration tank 11 has a sedimentation tank 90 including a scum outlet 91 and a clarified water outlet 92 for removing the nitrate nitrogen remaining in the wastewater introduced from the second anoxic tank 40 and reaerating in the reaeration tank 11, thereby preventing the sludge from floating by denitrification and the phosphorous from redischarging.
Further, the wastewater is separated solid from liquid in the sedimentation tank 90 to be clarified supernatant liquid, and the liquid is discharged through the clarified water outlet 92 or delivered to the next process, whereas the solid containing phosphorous is discharged through the sludge discharge tube 93 in order to remove the phosphorous from the wastewater.
However, since fine sludge contains much phosphorous within the sedimentation tank 90, the wastewater is removed by a baffle 94, a skimmer 95 and a scraper 96 and controlled in quantity of the wasted sludge. As a result, the wastewater maintains the optimum concentration of microorganisms in the aeration tank 10, the anoxic tank 50 and the anaerobic tank 20.
A recycling pump 100 is located outside the sedimentation tank 90 for selectively delivering the solid sludge at the bottom of the sedimentation tank 90 to the anoxic tank 50 or to the anaerobic tank 20 in order to remove the nutrient salts.
INDUSTRIAL APPLICABILITY
The wastewater disposal system in accordance with the invention supplies the anaerobic tank 20 and anoxic tank 50 with the wastewater disposal system in a single structure, so that the organic materials and nutrient salts including nitrate nitrogen and phosphorous can be treated more effectively than the conventional wastewater disposal system.
In the construction of the invention, organic materials in the wastewater are effectively treated in the aeration tank 10, since due to deep depth of water of the aeration tank 10, high propagation rates of oxygen and usage of pure oxygen make removal of the organic materials and deposition of the sludge excellent.
Phosphorous is removed by discharging phosphorous in the anaerobic tank 20 by characteristic of microorganisms e.g., luxury uptake in the aeration tank 10 and finally discharged by dumping the sludge. Again, nitrogen is removed such that microorganisms in the aeration tank
10 nitrate the nitrogen and the nitrate nitrogen is reduced as nitrogen gas in the first anoxic tank 30, and then discharged to the atmosphere. The remaining nitrated is removed in the second anoxic tank 40 by endogenous denitrification and re-aerated to prevent the sludge from floating on a surface of the wastewater and the phosphorous from re-discharging in the sedimentation tank 90.
Therefore, the present invention effectively treats the organic materials and nutrient salts in the wastewater, thereby improving the reliability of the products and the convenience of operation.
Although the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. Sewage and wastewater disposal system comprising: aeration tank (10) having a reaeration tank (11) in a upper portion thereof for treating the wastewater by microorganisms and oxygen; anaerobic tank (20) located at one side of the aeration tank (10) for mixing the wastewater introduced through a wastewater inlet tube (21) with the recycled sludges and discharging phosphorous from the wastewater; first anoxic tank (30) at the other side of the anaerobic tank (10) for mixing the wastewater of phosphorous discharging with the recycled aeration water of nitrification for deritrification; second anoxic tank (40) for removing the nitrate nitrogen by endogenous respiration of microorganisms, the nitrated nitrogen being delivered the denitrified wastewater to the aeration tank (10) through a transfer pump (60) and remaining in organic materials oxidized to nitrate nitrogen by microorganisms and oxygen; pure oxygen generator (70) located at a bottom of the aeration tank (10) for supplying oxygen to be consumed by the oxidation and nitrification of the organic materials with the wastewater delivering to the aeration tank (10); air compressor (80) for supplying the compressed air to a diffuser (81) to agitate the wastewater within the aeration tank (10), the diffuser (81) being located at the bottom of the aeration tank (10); sedimentation tank (90) located outside the reaeration tank (11) of the aeration tank (10) having a scum outlet (91) and a clarified water outlet (92) for removing the nitrated nitrogen remained in the wastewater, and reaerating in the reaeration tank (11) and denitrifying to prevent the sludge from floating and phosphorous from redischarging; and recycling pump (100) located outside of the aeration tank (10) for selectively delivering the sludge in the sedimentation tank (90) to the anoxic tank (50) and anaerobic tank (20) to remove the nutrient salts in the wastewater.
PCT/KR2001/000449 2000-03-21 2001-03-21 Sewage and wastewater disposal system WO2001070636A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44767/01A AU4476701A (en) 2000-03-21 2001-03-21 Sewage and wastewater disposal system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020000014206A KR100348500B1 (en) 2000-03-21 2000-03-21 Biological Nutrient Removal Technology for sewage and wastewater by deep pure oxygen Aeration
KR2000-14206 2000-03-21

Publications (1)

Publication Number Publication Date
WO2001070636A1 true WO2001070636A1 (en) 2001-09-27

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KR (1) KR100348500B1 (en)
CN (1) CN1239407C (en)
AU (1) AU4476701A (en)
WO (1) WO2001070636A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6555002B2 (en) * 2000-10-06 2003-04-29 Premier Wastwater International, Llc Apparatus and method for wastewater treatment with enhanced solids reduction (ESR)
CN113044964A (en) * 2021-03-16 2021-06-29 上海爱笛环境工程设备有限公司 High-reliability organic wastewater treatment process
CN115557608A (en) * 2022-09-28 2023-01-03 浙江海河环境科技有限公司 Based on high oxygen three-phase contact A 2 O wastewater deep denitrification treatment system

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CN100391875C (en) * 2006-10-08 2008-06-04 大连宇都环境工程技术有限公司 Integral sewage treating combined apparatus

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US5961826A (en) * 1997-07-10 1999-10-05 Kim; Woon-Chang Biological waste water treatment system having a sedimentation tank vertically combined with an aeration tank therein

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JPS63137798A (en) * 1986-11-27 1988-06-09 Takuma Co Ltd Fluidized bed type sewage treatment apparatus
JPH0312297A (en) * 1989-06-08 1991-01-21 Kajima Corp Aerobic and anaerobic combination type waste water treatment apparatus
KR0132937B1 (en) * 1994-12-27 1998-04-14 김은영 Apparatus for biological treatment of wastewater
KR0177912B1 (en) * 1996-08-30 1999-04-01 장기종 Biological and chemical circulation advanced treatment system of wastewater using integrated reaction tank and water quality control tank
KR100246493B1 (en) * 1998-01-30 2000-03-15 김운창 Sewage and waste water disposal plant

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Publication number Priority date Publication date Assignee Title
US5961826A (en) * 1997-07-10 1999-10-05 Kim; Woon-Chang Biological waste water treatment system having a sedimentation tank vertically combined with an aeration tank therein

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6555002B2 (en) * 2000-10-06 2003-04-29 Premier Wastwater International, Llc Apparatus and method for wastewater treatment with enhanced solids reduction (ESR)
US6605220B2 (en) * 2000-10-06 2003-08-12 Premier Wastewater International, Inc. Apparatus and method for wastewater treatment with enhanced solids reduction (ESR)
CN113044964A (en) * 2021-03-16 2021-06-29 上海爱笛环境工程设备有限公司 High-reliability organic wastewater treatment process
CN115557608A (en) * 2022-09-28 2023-01-03 浙江海河环境科技有限公司 Based on high oxygen three-phase contact A 2 O wastewater deep denitrification treatment system
CN115557608B (en) * 2022-09-28 2023-04-21 浙江海河环境科技有限公司 Three-phase contact A based on high oxygen 2 O wastewater advanced denitrification treatment system
US11905194B1 (en) 2022-09-28 2024-02-20 Zhejiang Haihe Environmental Technology Co., Ltd. Deep denitrification treatment system for wastewater by anaerobic-anoxic-oxic based on high-oxygen three-phase contact

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CN1239407C (en) 2006-02-01
CN1420847A (en) 2003-05-28
KR20010092160A (en) 2001-10-24
AU4476701A (en) 2001-10-03

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