EP1896371A4 - Systeme de traitement de l eau de petits cours d eau - Google Patents

Systeme de traitement de l eau de petits cours d eau

Info

Publication number
EP1896371A4
EP1896371A4 EP06757683A EP06757683A EP1896371A4 EP 1896371 A4 EP1896371 A4 EP 1896371A4 EP 06757683 A EP06757683 A EP 06757683A EP 06757683 A EP06757683 A EP 06757683A EP 1896371 A4 EP1896371 A4 EP 1896371A4
Authority
EP
European Patent Office
Prior art keywords
pit type
river
type bath
bath
water
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP06757683A
Other languages
German (de)
English (en)
Other versions
EP1896371A1 (fr
Inventor
Ba Do Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority claimed from KR20050057517A external-priority patent/KR100578050B1/ko
Application filed by Individual filed Critical Individual
Publication of EP1896371A1 publication Critical patent/EP1896371A1/fr
Publication of EP1896371A4 publication Critical patent/EP1896371A4/fr
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
    • E02B1/003—Mechanically induced gas or liquid streams in seas, lakes or water-courses for forming weirs or breakwaters; making or keeping water surfaces free from ice, aerating or circulating water, e.g. screens of air-bubbles against sludge formation or salt water entry, pump-assisted water circulation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/08—Treatment of wastewater in the sewer, e.g. to reduce grease, odour
    • 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
    • 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
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Definitions

  • the present invention relates to an apparatus for treating small river water and, more particularly, to an apparatus for treating urban small river water in the path of flow of a river.
  • Loss of self-purificability in an urban river results from decrease of length of flow and decrease of breadth of riverside by shaping of an unban river for use of space, decrease of amount in flow of river by drying and by acceleration of contamination. Since an urban river provides environments which tens of thousands or hundreds of thousands of people contact and enjoy, attempts have been continued to improve the water quality of urban rivers to a considerable level in order to satisfy the desire of citizens for comfortable environments and to use them as water resource effectively.
  • Water qualities of rivers can be graded based on bio-chemical criteria such as dissolved oxygen(DO), biological oxygen demand(BOD), chemical oxygen demand(COD) and etc., or based on the inhabited living organisms(indicator living organisms).
  • bio-chemical criteria such as dissolved oxygen(DO), biological oxygen demand(BOD), chemical oxygen demand(COD) and etc.
  • BOD and COD in the river water increase, more oxygen is needed and DO decreases drastically so that the self-purificability of the river may be lost.
  • a river with weak self-purificability not only smells bad but also restricts the inhabitation of the living things.
  • an urban river loses the self-purificability, it is graded as 4th or 5th Grade, or out of grade when a river has tens of ppm in BOD or COD value. The water quality of such a river may not be recovered unless inflow of pollution source is prevented or a proper treatment is implemented.
  • a solution for improvement of water quality should be compatible with ecological environments for living organisms.
  • the solution should satisfy habitation conditions of living organisms including fishes such as living, ascending and descending conditions.
  • the solution should have durability and be easily recovered in case of a great flow caused by a heavy rain including a flood.
  • Japanese Patent Publication No. 7000983 A2 disclosed a method for treating stream water.
  • the method is similar to a conventional sewage treatment process in which tanks are arranged to treat stream water. Since such a treatment requires large-scale facilities which have problems of high cost for construction and operation, and other disadvantages that a large-scale plant has in common.
  • Japanese Patent Publication No. 61230787 A2 disclosed a method for treating stream water in which a structure for diverting the path of water stream is built and ceramic particles are trapped in the structure to contact the water treated. Also, Japan Patent Publication No. 7016586 A2 disclosed a method for treating stream water by means of porous particulate materials.
  • the slopes made artificially may be easily spoiled by deposition of soil or corrosion due to a heavy rain although a stream looks as close as natural state.
  • water plants or waterside plants may be used to increase the dissolved oxygen in the water by respiration of plants and to increase self-purificability of a stream.
  • an object of the present invention is to provide an apparatus for effectively treating river water which does not require a lot of additional spaces with a few working parts and simple structure, and is durable against violent natural phenomena, and which is cost effective for installation and maintenance without spoiling much an appearance of a natural river and without doing harm to habitation conditions such as living, ascending and descending conditions of living organisms including fishes.
  • Another object of the present invention is to provide an apparatus for treating water of a small river that can improve water quality from the lower grade to the third or higher grade.
  • the present invention provides an apparatus for treating water of a small river, comprising a pit type bath built below a river bed in the path of flow, and aeration means equipped in the pit type bath for aerating and whirling the water which flows into the pit type bath.
  • the present invention provides an apparatus for treating a river water, comprising a pit type bath built below a river bed on the path of flow, the pit type bath being wider than half of an effective flow width of the river, being more than 2 meters deep and having length of more than 10 minutes retention time, and aeration means equipped in the pit type bath for aerating and whirling the water which flows into the pit type bath.
  • the apparatus for treating river water of the present invention is preferably applied to an urban river, but it may be applied in its entirety to a common river which lost self-purification capability.
  • the aeration means desirably comprises diffusers installed near the bottom of the pit type bath, pipes connected to the diffusers and pressurized air sources to supply air to the diffusers via the pipes.
  • the pit type bath of the present invention is wider than two thirds of an effective flow width of the river, 3 m to 5 m deep and having length of more than 30 minutes retention time.
  • a typical small urban river has water depth of about tens of centimeters, flow rate of about several meters per minute and flow width of about tens of meters. If it is assumed that mean water depth, mean flow rate and mean flow width of an urban river are respectively 20cm, 5m/min and 30 m, and then the size of the pit type bath of 4m depth and 1 hour retention time would have a dimension of 30 m x 15 m x 4 m.
  • Inflow and outflow of river water into and from the pit type bath are implemented by flow of a river by itself without using pumping means. Since the height of the front wall and the rear wall of the pit type bath are adjusted to be similar to the slope of a river-bed, the flows near the inlet and the outlet of the pit type bath form smooth stream or a low fall or a small cascade at most. The front wall and the rear wall may have low thresholds to form cascades of flow. It is preferable that the pit type bath is built in a region in which a slope of the river-bed is gentle so that the thresholds of the front wall and the rear wall may not make high falls, and thus aquatic living organisms may ascend or descend through the bath.
  • the diffusers or aerators in the pit type bath are disposed to provide water being treated by aeration in the bath with whirling upward and downward by which most of river water stays in the bath evenly for a mean retention time without being discharged directly.
  • the aerators are disposed in plural lines in flow direction of a river near the bottom of the pit type bath so that a plurality of whirls may be formed.
  • An air generating means such as a blower or a compressor supplies pressurized air to the aerators through pipes with or without an air tank interposed between the air generating means and the aerator.
  • Types of aerators or diffusers are not specially restricted.
  • disk types or porous plate types for aerators may be used.
  • Aerators or diffusers may be simply holes formed on the pipes located in the bath to supply airs.
  • a pump is not used basically to supply or to discharge river water into or out of the pit type bath, but pipelines and a pump connected to the pipelines may be used to drain water for its maintenance.
  • the pit type bath typically has a front wall, a rear wall and two side walls and a bottom.
  • the bath, especially the walls preferably is made of concrete for durability and for convenient construction.
  • the bottom is made of impermeable concrete, but it may have a permeable bottom structure in order to allow underground water below a river bed to flow into the bath.
  • screens may be mounted in order to prevent big and heavy bodies such as rocks or pebbles from coming in the bath.
  • an ejector Near the rear wall inside of the bath, an ejector, an air jet or a water jet may be equipped to intermittently scatter precipitated particles to whirling area in the bath.
  • the rear wall of the pit type bath may slant, preferably by less than 60 degrees, most preferably by 15 to 45 degrees, from the vertical line. With aerators intentionally removed, or structurally eliminated by the slant wall, near the rear wall in the pit type bath, whirling of river water may decrease, and therefore particles suspended by whirling may settle down.
  • a sump for collecting particles settled down may be provided on the bottom near the rear wall inside the pit type bath.
  • Pipelines for pumping may be connected to the sump so that the precipitated particles may be intermittently suctioned by means of a pump, an air jet or an ejector to be carried into whirling region or to be separated.
  • an additional hopper type pit for precipitating particles may be built downstream of the pit type bath and the precipitated particles may be carried out to the pit type bath or may be removed periodically by pumping through connected pipelines.
  • a pump for picking up settled particles may preferably move along guidance rails installed under a bridge constructed above the rear wall of the pit type bath and may suction and remove the particles collected in the sump. The removed particles may be sent back to the forward portion of the pit type bath so that they may be used as contact media or may be treated separately.
  • Contact media for fluidizing may be fed into the pit type bath of the present invention.
  • the contact media are preferably particles which suspend in whirling region and settle in a region where whirling is attenuated.
  • Porous natural or artificial ceramic particles, mineral particles, for example, primary-fired ceramic ball or zeolite particles may be used for contact media.
  • the contact media for fluidizing used in accordance with the present invention preferably have relatively higher specific gravity not to flow away and not to be too consumptive.
  • the present invention may use heavy particles such as sand. Since such heavier particles may settle in the attenuated region so as to be recovered, only the amount of loss may be replenished.
  • the apparatus for treating small river water in accordance with the present invention has merits as follow; [34] i) it does not require a large additional space since the pit type bath is built under a river bed. [35] ii) it is durable against violent natural phenomena and cost-effective with simple structure and easy maintenance since there is no operational mechanism except for the aeration means. The pit type bath is not easily filled up and does not need frequent maintenances since turbulent flows or whirlings exist in the bath by aeration. [36] iii) it is compatible with environments without spoiling much an appearance of a natural river and without doing harm to habitation conditions such as living, ascending and descending conditions of living organisms including fishes. [37] iv) it treats river water effectively and raises self- purificability of a river with effective increase of dissolved oxygen and use of particulate media which naturally flow into and suspend in the apparatus.
  • Fig. 1 is a side cross-sectional view for schematically illustrating one embodiment of the present invention
  • Fig. 2 is a side cross-sectional view for schematically illustrating another embodiment of the present invention
  • Fig. 3 is a side cross-sectional view for schematically illustrating another embodiment of the present invention
  • Fig. 4 is a side cross-sectional view for schematically illustrating another embodiment of the present invention
  • Fig. 5 is a side cross-sectional view for schematically illustrating another embodiment of the present invention. Best Mode for Carrying Out the Invention
  • Fig 1 is a side cross-sectional view for schematically illustrating an embodiment of the present invention, wherein a pit type bath(l ⁇ ) has a front wall and a rear wall, the heights of which are adjusted to be similar to the slope of a river-bed(l) with low thresholds, so that the flow near the inlet of the bath forms a small cascade and the flow near the outlet of the bath forms a smooth flow.
  • Aerators(22) in the pit type bath are disposed to provide the river water in the bath with whirlings upward and downward and thereby for any of the river water flowed in not to be directly discharged.
  • the aerators(22) are disposed in plural lines in flow direction of a river near the bottom of the pit type bath so that a plurality of whirls may be formed.
  • An air generating means(21) such as a blower or a compressor supplies pressurized air to the aerators(22) through pipelines.
  • Types of aerators are not specially restricted. For example, disk types or porous plate types for aerators may be used.
  • Fig. 2 is another side cross-sectional view for schematically illustrating another embodiment of the present invention, wherein the pit type bath(l ⁇ ) has a rear wall slanted toward a flow direction from the vertical line. Whirling is attenuated without aerators present for the rearward portion of the bath corresponding to slanted wall, and some of suspended particles (primarily sands) settle, slide down along the slant of the rear wall and go back into a whirling region to sustain some density of particles in the bath.
  • Fig. 3 shows the pit type bath (10) which provides the means for picking up the settled particles. On slant of lower portion of rear wall in the bath air jet(25) is mounted to intermittently scatter settled particles into whirling area in the bath.
  • FIGs. 4 and 5 shows the structure of the pit type bath(l ⁇ ) in which a sump(15) is formed on the bottom near the rear wall of the pit type bath.
  • an ejector(27) is mounted in the sump(15) so that the collected particles may be carried to the forward portion of the pit type bath.
  • a pump moves along a guidance rail(42) installed beneath a bridge(40) constructed above the rear wall of the pit type bath. The pump suctions collected particles in the sump(15) with water through a suction pipe(31) and then, the filtered water is drained through a drain pipe(32). The picked particles may be provisionally stored for disposal or carried back to the forward portion of the pit type bath(l ⁇ ) to be supplied into the bath.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

La présente invention concerne un système de traitement de l’eau de petits cours d’eau urbain intégré au tracé d’écoulement du cours d’eau comprenant : un bassin de type fosse creusé sous le lit du cours d’eau sur son tracé et doté de moyens d’aération pour aérer et agiter l’eau qui y coule. Le système objet de la présente invention présente les avantages suivants : i) il ne nécessite aucun espace supplémentaire important. ii) Il est durable et résiste aux phénomènes naturels violents, ainsi que rentable avec sa structure simple et son entretien facile. En effet, le bassin de type fosse ne se remplit pas rapidement et ne nécessite aucun entretien fréquent du fait des mouvements tourbillonnaires qui y sont créés par aération. iii) Il respecte l’environnement. iv) Il traite efficacement l’eau et améliore l’auto-nettoyage du cours d’eau.
EP06757683A 2005-05-16 2006-05-10 Systeme de traitement de l eau de petits cours d eau Ceased EP1896371A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR20050040520 2005-05-16
KR20050057517A KR100578050B1 (ko) 2005-05-16 2005-06-30 하천 정화 장치
PCT/KR2006/001744 WO2006123868A1 (fr) 2005-05-16 2006-05-10 Systeme de traitement de l’eau de petits cours d’eau

Publications (2)

Publication Number Publication Date
EP1896371A1 EP1896371A1 (fr) 2008-03-12
EP1896371A4 true EP1896371A4 (fr) 2008-09-17

Family

ID=37431420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06757683A Ceased EP1896371A4 (fr) 2005-05-16 2006-05-10 Systeme de traitement de l eau de petits cours d eau

Country Status (2)

Country Link
EP (1) EP1896371A4 (fr)
WO (1) WO2006123868A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9611635B1 (en) * 2015-11-12 2017-04-04 Ken Pandya High efficiency water treatment process
CA3149458A1 (fr) 2019-09-04 2021-03-11 11814192 Canada Inc. Dispositif d'echantillonnage de traitement d'eaux usees
WO2021042199A1 (fr) * 2019-09-04 2021-03-11 11814192 Canada Inc Dispositif d'échantillonnage de traitement d'eaux usées

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470091A (en) * 1967-02-21 1969-09-30 Dorr Oliver Inc Treatment of polluted streams in place
JPS59166898U (ja) * 1983-04-25 1984-11-08 株式会社　西原環境衛生研究所 河川浄化装置
JPH0947605A (ja) * 1995-08-04 1997-02-18 Kito Koichi 貯水槽
JPH10272481A (ja) * 1997-03-31 1998-10-13 Komaki Kensetsu Kk 河川の接触式酸化用処理槽、及び河川の接触式酸化処理装置
KR200323478Y1 (ko) * 2003-03-24 2003-08-14 엽정화 폭기를 이용한 하천의 미생물 활성화 및 광합성을 위한물 정화 장치
KR20040007372A (ko) * 2003-12-20 2004-01-24 서성만 저수된 물의 수질오염방지구조
JP2004330066A (ja) * 2003-05-07 2004-11-25 Mie Prefecture 浄水用ブロックとその製造方法および該浄水用ブロックを用いた浄水装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61293592A (ja) * 1985-06-21 1986-12-24 Kureha Gosen Kk 汚水処理のための接触材

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470091A (en) * 1967-02-21 1969-09-30 Dorr Oliver Inc Treatment of polluted streams in place
JPS59166898U (ja) * 1983-04-25 1984-11-08 株式会社　西原環境衛生研究所 河川浄化装置
JPH0947605A (ja) * 1995-08-04 1997-02-18 Kito Koichi 貯水槽
JPH10272481A (ja) * 1997-03-31 1998-10-13 Komaki Kensetsu Kk 河川の接触式酸化用処理槽、及び河川の接触式酸化処理装置
KR200323478Y1 (ko) * 2003-03-24 2003-08-14 엽정화 폭기를 이용한 하천의 미생물 활성화 및 광합성을 위한물 정화 장치
JP2004330066A (ja) * 2003-05-07 2004-11-25 Mie Prefecture 浄水用ブロックとその製造方法および該浄水用ブロックを用いた浄水装置
KR20040007372A (ko) * 2003-12-20 2004-01-24 서성만 저수된 물의 수질오염방지구조

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006123868A1 *

Also Published As

Publication number Publication date
WO2006123868A1 (fr) 2006-11-23
EP1896371A1 (fr) 2008-03-12

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