WO1998023544A1 - Procede et appareil de traitement des eaux par adjonction de peroxyde d'hydrogene - Google Patents

Procede et appareil de traitement des eaux par adjonction de peroxyde d'hydrogene Download PDF

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Publication number
WO1998023544A1
WO1998023544A1 PCT/GB1997/003200 GB9703200W WO9823544A1 WO 1998023544 A1 WO1998023544 A1 WO 1998023544A1 GB 9703200 W GB9703200 W GB 9703200W WO 9823544 A1 WO9823544 A1 WO 9823544A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
hydrogen peroxide
withdrawn
dissolved oxygen
jet
Prior art date
Application number
PCT/GB1997/003200
Other languages
English (en)
Inventor
Maurice John Hancock
Derek George Carter
Andrew Frank Sweetapple
Original Assignee
O2Spray Limited
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 GBGB9624594.9A external-priority patent/GB9624594D0/en
Application filed by O2Spray Limited filed Critical O2Spray Limited
Priority to AU50617/98A priority Critical patent/AU5061798A/en
Publication of WO1998023544A1 publication Critical patent/WO1998023544A1/fr

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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • 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
    • 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

  • This invention relates to the treatment of relatively large bodies of comparatively still water such as slow-flowing rivers, canals, ponds, lakes or reservoirs.
  • the invention is of particular application to the treatment of water at fish farms.
  • Pollution incidents and natural events can cause a significant drop in dissolved oxygen levels or can result in other chemical or biochemical changes which require urgent treatment to restore the water to a life-sustaining condition.
  • a method of increasing the dissolved oxygen content of a body of water comprising withdrawing water from said body of water, adding hydrogen peroxide to the water which is withdrawn and delivering the hydrogen peroxide-containing water back into the body of water from which it was withdrawn.
  • apparatus for use in increasing the dissolved oxygen content of a body of water, said apparatus including pump means for withdrawing water from said body of water and for returning it to said body of water, and dosing means for adding hydrogen peroxide to the withdrawn water prior to return thereof to the body of water.
  • the hydrogen peroxide is preferably contained within a storage container from which the hydrogen peroxide is withdrawn as a result of a venturi effect obtained as a result of the flow of the withdrawn water through the apparatus.
  • the water containing hydrogen peroxide is preferably returned to the body of water from which it was withdrawn in the form of a jet.
  • the apparatus may be mounted on a boat and the jet of water may then serve for the propulsion of the boat, with steering of the boat effected by changing the direction of the jet.
  • the boat can be a small lightweight structure which can be easily and quickly transported to the site and operation of the apparatus on the boat may be controlled either remotely or by the occupants of the boat. If operation of the apparatus is remotely controlled, the remote control may control one or more of the following:- a) the speed of the water jet, b) steering of the boat by adjustment of the jet angle, c) the dosing rate, and d) operation of the water jet, i.e. an on-off control allowing the boat to be stopped.
  • the apparatus may be mounted either on a fixed supporting structure, for example, on a fish farm, or on a trailer so that it can readily be transported from one site to another.
  • the pump means which is used may alternatively be a submersible electric pump which is submersed in the body of water to be treated.
  • the apparatus may include a pump having an inlet or inlet pipe through which water is withdrawn from the body of water to be treated and an outlet pipe through which the water is returned in the form of a jet.
  • the outlet pipe may be, for example, of 50 mm. or 75 mm. in diameter.
  • the hydrogen peroxide from the storage container is preferably fed into the outlet pipe, being connected to the outlet pipe by means of a supply line which contains an adjustable flow control valve.
  • venturi to withdraw the hydrogen peroxide from the storage container means that no separate motor or other actuator is required to effect dispensing of the hydrogen peroxide which can be arranged to flow from the storage container under the suction effect generated by the high-pressure flow of the water through the outlet pipe. It also avoids leakage of hydrogen peroxide into the body of water when the pump is not operating.
  • the apparatus may be arranged for automatic operation under the control of a sensor which senses the level of dissolved oxygen in the body of water and causes the apparatus to be actuated when the dissolved oxygen content falls below a predetermined level.
  • Figure 1 shows a first form of apparatus for use in the treatment of water at a fish farm
  • FIG. 2 is a detail view showing the method of operation of the venturi
  • Figure 3 is a plan view of a boat on which a second form of the water treatment apparatus is mounted
  • Figure 4 is a side view of the boat
  • Figure 5 is a schematic diagram showing the interconnections between the main components of the apparatus.
  • the apparatus shown in Figure 1 comprises a submersible electric pump 10 which is submersed in the body of water 11 whose dissolved oxygen content is to be maintained at above a predetermined minimum level.
  • the dissolved oxygen content of the body of water 11 is monitored by a sensor 12 which controls the operation of a switch 13 in the supply line 14 of the pump 10 so that, whenever the dissolved oxygen content falls below the predetermined level, the switch 13 is closed and the pump 10 is operated.
  • the pump 10 has an inlet (not shown) through which the water from the body of water 11 is withdrawn on operation of the pump 10 for discharge through an outlet pipe 15 which terminates in a discharge section 16 mounted on a stand 17 so that the water issues from the discharge section in the form of a horizontal high- pressure jet.
  • Hydrogen peroxide to be introduced into the jet of water issuing from the discharge section 16, is contained within a storage container 18 connected to the discharge section 16 by a pipe 19 which includes a flow control valve 20.
  • the pipe 19 extends from the top of the container 18. There will thus be no tendency for the hydrogen peroxide to flow gravitationally from the container 18 along the pipe 19.
  • the hydrogen peroxide in the container is typically a 30% or 35% by weight aqueous solution of hydrogen peroxide.
  • the discharge section 16 of the outlet pipe 15 is shown in detail in Figure 2 and includes an inner tube 21 which is located adjacent the entry end of the discharge section and has a cross- sectional area which is substantially less than the cross-sectional area of the remainder of the outlet pipe 16.
  • the inner tube 21 is maintained in position on the axis of the discharge section 16 by means of a support sleeve 22 which has a tapering mouth 23 so that the velocity of the water flowing through the outlet pipe 15 will be increased substantially when it enters the inner tube 21 and a venturi effect will be obtained, causing the hydrogen peroxide solution to be withdrawn from the storage container 18 along the pipe 19 so as to enter the discharge section 16 of the outlet pipe 15 through at a position adjacent the support sleeve 22.
  • the hydrogen peroxide sucked into the discharge section 16 will be mixed with the jet of water flowing out of inner tube 21.
  • the rate at which the hydrogen peroxide is withdrawn from the storage container 18 is adjustable by adjusting the setting of the flow control valve 20 and/or by adjusting the rate at which the pump 10 is running (if the pump 10 is an adjustable pump).
  • the rate at which the hydrogen peroxide solution is withdrawn from the container 18 is typically 3 litres per minute.
  • the contents of the container can be discharged in a period of ten minutes with the valve 20 fully open.
  • the solubility of oxygen in water is 10 mg./litre
  • the dissolved oxygen content of 2.275 million litres of water can be increased from a figure of 60% of the maximum dissolved oxygen content to a figure of 80% in a period of ten minutes.
  • the discharge section 16 is supported on a stand 17 which is supported on the land adjacent the edge of the body of water 11. It is to be appreciated that, if required, the stand 17 could be carried by a float which is connected by a rope or other line to the storage container 18.
  • FIG. 3 this includes apparatus having a number of features in common within the apparatus of Figures 1 and 2 but mounted on a boat.
  • the boat has a lightweight hull 101 , which may be formed, for example, from polyester resin reinforced with glass fibres.
  • a petrol-driven centrifugal pump 102 draws in water from beside the hull 101 via an inlet pipe 103 and expels the water through an outlet pipe which includes a venturi section 104, a short length of flexible conduit 105 and an outlet nozzle 106 which projects from the rear of the hull 101 to self-propel the boat by emitting a high-speed water jet.
  • the venturi section 104 is preferably constructed from a non- corrosive material, such as an aluminium alloy and has a side inlet which is provided with a control valve 109 which is connected, via a narrow-bore suction pipe 110 to one of two storage containers 111 and 112 filled with hydrogen peroxide solution so that, as water is caused to flow through the venturi section 104, the hydrogen peroxide solution will be drawn from container 111 for admixture with the jet of water being discharged from the nozzle 106.
  • a control valve 109 which is connected, via a narrow-bore suction pipe 110 to one of two storage containers 111 and 112 filled with hydrogen peroxide solution so that, as water is caused to flow through the venturi section 104, the hydrogen peroxide solution will be drawn from container 111 for admixture with the jet of water being discharged from the nozzle 106.
  • the operation of the apparatus is controlled by a control unit 114 the operation of which will now be described with reference to Figure 5.
  • the control unit 114 includes a radio receiver 121 which receives command signals from a four-channel radio transmitter 122 operated from a remote location such as a river bank. Automatic positioning control could be incorporated if desired.
  • the outputs of the four channels from the transmitter 122 are used as follows:-
  • a steering control line 127 is used to control a servo motor 128.
  • the servo motor 128 can be operated from an on-board battery which also powers the control unit 114.
  • the servo motor 128 is connected to the jet outlet nozzle 106 via a steering linkage 115 so that the boat can be steered by adjusting the direction of the water jet issuing from the nozzle 106.
  • the rate at which hydrogen peroxide is drawn into the water jet by the action of the venturi can be controlled accurately by adjusting the setting of the flow control valve 109. This accurately controls the rate at which hydrogen peroxide is fed into the body of water to be treated.
  • the vigorous jetting action ensures that the hydrogen peroxide is thoroughly distributed within the water undergoing treatment and, by steering the boat by means of the servo motor 128, a large area of water can be treated fairly evenly in a very short period of time. The boat will typically be steered in a zig-zag path over the required area.
  • the hydrogen peroxide discharged into the body of water to be treated begins to break down into water and oxygen on contact with the body of water and exposure to daylight. This breakdown generally starts immediately and continues for some time dependant on, for example, the quantity of suspended solids present in the body of water. There is thus a virtually instantaneous increase in the level of dissolved oxygen in the body of water.
  • the control unit 114 may be connected to a sensor (not shown) for detecting the level of dissolved oxygen in the vicinity of the boat so that, for example, the setting of the valve 109 could be controlled automatically to achieve the correct dosage rate instead of being controlled by the remote transmitter 122.
  • a sensor not shown
  • Such automatic operation could be useful in long-term water quality maintenance, for example, on fish farms, at effluent treatment plants, especially those using activated sludge, and below storm sewage overflows.
  • the boat is compact, lightweight and easily transported, e.g. using a rapid response trailer, b) the apparatus can be made ready for use in minutes, c) operation is possible in a wide variety of situations, including very shallow water, d) operation of the apparatus can be controlled remotely from bridge crossings, avoiding the need to negotiate access or travel over difficult terrain, and e) the method of operation is inherently safe - the use of a venturi ensures that the hydrogen peroxide cannot be drawn from the storage container without being diluted before leaving the outlet.
  • the apparatus is simple to operate, therefore a minimum of operator training is required, b) hydrogen peroxide is readily available and can often be delivered on site, c) the apparatus is very versatile and can be used for effluent treatment as well as on fish farms.
  • the specific form of apparatus shown in Figures 3 and 5 is remotely controlled.
  • the boat on which the apparatus is mounted may, however, be steered and controlled by the occupants of the boat. If the outlet through which the jet of water containing hydrogen peroxide is of relatively low diameter, for example, 50 mm. diameter, steering of the boat may be effected by adjusting the direction of discharge of the jet. If, however, a larger diameter outlet is used (and a correspondingly higher output pump is used), for example, a 75 mm. diameter outlet, a separate steering system is preferably provided.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

On accroît la teneur en oxygène dissous d'une masse d'eau (11) par adjonction de peroxyde d'hydrogène à de l'eau prélevée sur la masse d'eau (11) à l'aide d'une pompe (10) puis renvoyée dans la masse d'eau (11) sous forme de jet. L'eau pompée passe par une tubulure d'éjection (15) dont la section d'éjection (16) comporte un venturi conçu pour extraire le peroxyde d'hydrogène d'un récipient (18) le contenant.
PCT/GB1997/003200 1996-11-27 1997-11-21 Procede et appareil de traitement des eaux par adjonction de peroxyde d'hydrogene WO1998023544A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU50617/98A AU5061798A (en) 1996-11-27 1997-11-21 Method and apparatus for water treatment by addition of hydrogen peroxide

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9624594.9 1996-11-27
GBGB9624594.9A GB9624594D0 (en) 1996-11-27 1996-11-27 Water treatment vessel
GB9705711.1 1997-03-19
GBGB9705711.1A GB9705711D0 (en) 1996-11-27 1997-03-19 A portable hydrogen peroxide device for dosing water and effluents

Publications (1)

Publication Number Publication Date
WO1998023544A1 true WO1998023544A1 (fr) 1998-06-04

Family

ID=26310491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/003200 WO1998023544A1 (fr) 1996-11-27 1997-11-21 Procede et appareil de traitement des eaux par adjonction de peroxyde d'hydrogene

Country Status (2)

Country Link
AU (1) AU5061798A (fr)
WO (1) WO1998023544A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003086988A1 (fr) * 2002-04-18 2003-10-23 Hollandsche Beton Groep N.V. Procede pour traiter des eaux et leurs sediments
US20120172221A1 (en) * 2009-09-15 2012-07-05 Solvay Sa Process for treating with a chemical compound a body of water used in aquaculture
CN102765810A (zh) * 2012-07-16 2012-11-07 中山大学 一种提高人工湿地除污能力的方法
US9365425B2 (en) 2012-08-31 2016-06-14 Water Star, Inc. High pressure dissolved oxygen generation
WO2019144532A1 (fr) * 2018-01-26 2019-08-01 Linde Aktiengesellschaft Appareil de dissolution d'oxygène pour étangs

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505213A (en) * 1969-02-24 1970-04-07 Martin Marietta Corp Method and apparatus for purifying a natural body of water
DE3702771A1 (de) * 1987-01-30 1988-08-11 Schuette Reiner Vorrichtung zur restaurierung bzw. sanierung von stehenden gewaessern
EP0366010A1 (fr) * 1988-10-28 1990-05-02 Messer Griesheim Gmbh Appareil mobile pour oxygéner des eaux
DE4008676A1 (de) * 1990-03-17 1991-09-19 Krupp Buckau Maschinenbau Gmbh Verfahren und vorrichtung zur aeroben abwasserbehandlung
US5314076A (en) * 1991-02-04 1994-05-24 Gie Anjou-Recherche Installation for the mixing of two fluid phases by mechanical stirring, notably for the treatment of water by transfer of oxidizing gas, and use of such an installation
WO1995009283A1 (fr) * 1993-09-28 1995-04-06 Minister For Infrastructure Regulation de depots de fer dans des pompes de trou de sondage
JPH09150142A (ja) * 1995-12-01 1997-06-10 Sansui Kagaku Kk 過酸化水素水による湖沼浄化システム

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505213A (en) * 1969-02-24 1970-04-07 Martin Marietta Corp Method and apparatus for purifying a natural body of water
DE3702771A1 (de) * 1987-01-30 1988-08-11 Schuette Reiner Vorrichtung zur restaurierung bzw. sanierung von stehenden gewaessern
EP0366010A1 (fr) * 1988-10-28 1990-05-02 Messer Griesheim Gmbh Appareil mobile pour oxygéner des eaux
DE4008676A1 (de) * 1990-03-17 1991-09-19 Krupp Buckau Maschinenbau Gmbh Verfahren und vorrichtung zur aeroben abwasserbehandlung
US5314076A (en) * 1991-02-04 1994-05-24 Gie Anjou-Recherche Installation for the mixing of two fluid phases by mechanical stirring, notably for the treatment of water by transfer of oxidizing gas, and use of such an installation
WO1995009283A1 (fr) * 1993-09-28 1995-04-06 Minister For Infrastructure Regulation de depots de fer dans des pompes de trou de sondage
JPH09150142A (ja) * 1995-12-01 1997-06-10 Sansui Kagaku Kk 過酸化水素水による湖沼浄化システム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 097, no. 010 31 October 1997 (1997-10-31) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003086988A1 (fr) * 2002-04-18 2003-10-23 Hollandsche Beton Groep N.V. Procede pour traiter des eaux et leurs sediments
US20120172221A1 (en) * 2009-09-15 2012-07-05 Solvay Sa Process for treating with a chemical compound a body of water used in aquaculture
US8883684B2 (en) * 2009-09-15 2014-11-11 Solvay Sa Process for treating with a chemical compound a body of water used in aquaculture
US9532553B2 (en) 2009-09-15 2017-01-03 Solvay Sa Process for treating with a chemical compound a body of water used in aquaculture
CN102765810A (zh) * 2012-07-16 2012-11-07 中山大学 一种提高人工湿地除污能力的方法
US9365425B2 (en) 2012-08-31 2016-06-14 Water Star, Inc. High pressure dissolved oxygen generation
WO2019144532A1 (fr) * 2018-01-26 2019-08-01 Linde Aktiengesellschaft Appareil de dissolution d'oxygène pour étangs

Also Published As

Publication number Publication date
AU5061798A (en) 1998-06-22

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