EP0293418A1 - Procede de traitement de liquides - Google Patents

Procede de traitement de liquides

Info

Publication number
EP0293418A1
EP0293418A1 EP87907734A EP87907734A EP0293418A1 EP 0293418 A1 EP0293418 A1 EP 0293418A1 EP 87907734 A EP87907734 A EP 87907734A EP 87907734 A EP87907734 A EP 87907734A EP 0293418 A1 EP0293418 A1 EP 0293418A1
Authority
EP
European Patent Office
Prior art keywords
flow
liquid
container
flow path
gas
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.)
Withdrawn
Application number
EP87907734A
Other languages
German (de)
English (en)
Inventor
Peter Hiltebrand
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
Application filed by Individual filed Critical Individual
Publication of EP0293418A1 publication Critical patent/EP0293418A1/fr
Withdrawn legal-status Critical Current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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1294—"Venturi" aeration means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2322—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles using columns, e.g. multi-staged columns
    • 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
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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 method and a device according to the preambles of independent claims 1 and 6.
  • processing agent denotes a gaseous substance which, in essentially pure form or as a component of a gas mixture, accomplishes the above-mentioned processing task.
  • the mass transfer processes at the phase interface as well as the partially low concentrations of the active treatment component represent the performance-limiting factors. Corresponding treatment processes therefore require certain minimum contact and exposure times between the liquid and the treatment agent.
  • the method according to the invention comprises two main steps:
  • the treatment agent entry takes place primarily in the circulatory flow under controlled flow conditions. In particular, this facilitates the optimization of the gas-liquid mass transport and allows stationary loading driving conditions.
  • the raw water is also contacted with treatment agent immediately after entering the treatment area. A strong backmixing of the liquid takes place within the individual zones of the circulatory flow (mixing zone raw liquid-circulatory liquid, pump, separation zone gas-liquid).
  • the main direction of flow of the liquid leading to the container head ie upward, has great advantages. If the liquid drive means is switched off intentionally or unintentionally, firstly no liquid can flow out of the process, rather the liquid level drops due to the natural separation of the gas caused by the buoyancy. Secondly, the flow control also prevents the pre-treated water from mixing back even with a standstill, with any raw liquid that has already been entered but not yet adequately treated. In the area of the vertical flow sections, the automatically redispersing can be influenced by the use of additional redispersants. For example, it is possible to optimize the gas-liquid mass transfer using static mixed elements or frits.
  • the treatment agent can furthermore be wholly or partially, e.g. be gradually removed from the reprocessing process. This can be advantageous, for example, in the case of viscous liquids.
  • concentration of dissolved processing agent in the liquid can be reduced if necessary with the aid of a further gaseous agent added after removal.
  • the figure shows a device in which pre-filtered raw water is processed into drinking water using the method according to the invention.
  • Ozone is used as a conditioning agent.
  • the pre-filtration and ozone generation process steps, not shown or described, are assumed to be known.
  • the pre-filtered raw water flows through the nozzle 5 into the chamber 3, which is open at the top and represents a partial volume of the treatment container 1.
  • the chamber 3 contains the intake port 6 of the circulatory flow 12 which detects the lower container content. If no raw water flows in, the water which flows through the opening 14 in the container flows into the circuit. However, as soon as raw water flows in, it is preferably sucked into the circuit.
  • the pump 13 conveys the water in the circuit through the mixing element IS, where ozone-containing air is mixed, via the nozzle 7 into the second chamber 4, which is also open at the top.
  • the two chambers 3, 4 are separated from one another by a partition 2. This partition can either perform the function of an overflow weir or, as shown in the figure, close the circuit flow by means of an opening 19. If necessary, it can be provided with a device, not shown, which prevents water from being returned from the chamber 3 into the chamber 4.
  • the division of the container bottom area into two chambers has the advantage that the raw water is passed through the circuit at least once and high concentration ozone is added. It also ensures segregation of the gas outside the suction area of the circulation pump, which among other things. the use of conventional centrifugal pumps in the circuit.
  • the ratio of inlet flow and circulation flow can be chosen freely and thus adapted to the respective reaction rates.
  • repeated circulation ie a ratio of circulating flow to supply flow of greater than 1 is indicated, since the ozone consumption of the raw water is high at the beginning of the reaction, the solubility of ozone in water rel. is low.
  • the circuit flow can of course also function with the raw water supply switched off or interrupted.
  • the mixing element can be optimally dimensioned in the circuit thanks to the stationary cleaning parameters, which is particularly advantageous when using injectors or venturi mixers.
  • the pump 13 can also be arranged after the mixing element 15. In this case, it must be able to convey gas and liquid at the same time. This is the case, for example, with side channel pumps. Particularly high material input rates have been observed.
  • the cycle can also be implemented differently than shown. It can be arranged completely within the container 1. However, it is also possible to use an axial agitator arranged in a guide tube instead of a pump, if necessary with special gas entry propeller blades.
  • the gas entered into the chamber 4 automatically flows upward and reaches the first horizontal flow zone through the frit 11 inserted in the bottom floor.
  • the gas is redispersed through the frit 11, which again leads to increased material input. If water is removed from the container at the same time, a corresponding amount of water also flows vertically upwards through the first frit mentioned.
  • guide elements e.g. sheet metal strips fastened to the floor, a guide that leads, for example, to a graft flow.
  • the number of floors required is mainly determined by the necessary dwell time. A range of 15 to 45 minutes is given as a guideline for water zoning. Preferably more than 20 floors are used.
  • the floors are interchangeable in the container via annular spacers 17 designed as sealing elements used and fixed in position by clamping elements.
  • Another installation device can of course also be provided if it fulfills the conditions mentioned.
  • the tensioning elements are not shown in the figure.
  • openings or frits can also be arranged at other locations on the floors than shown in the figure.
  • the openings or frits can also be arranged at other locations on the floors than shown in the figure.
  • the method according to the invention offers the simplest control options. If, for example, the quality of the starting liquid does not meet the required minimum values, either the raw liquid supply can be throttled (the circulation flow is independent of it) or the processing agent supply can be increased. In the event that completely inadequate preparation quality should be determined, a bypass circuit from the container outlet to the entry support 5 is conceivable (this bypass is not shown in the figure).
  • the quality control can be carried out, for example, by means of a redox measurement.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

Ce procédé exige l'utilisation d'un agent de traitement gazeux. Dans une première étape du processus, le liquide circule plusieurs fois en circuit fermé où il est mis en contact avec l'agent de traitement. En aval de ce circuit fermé (3, 4) se trouve une zone de réaction composée de sections d'écoulement alternativement verticales et horizontales (9, 11, 17) où il ne se produit pas de remélangeage appréciable. Pendant cette seconde étape du processus, le liquide continue à être mis en contact avec l'agent de traitement s'écoulant dans le même sens. Ce procédé est particulièrement utile pour l'ozonisation de l'eau.
EP87907734A 1986-12-17 1987-12-10 Procede de traitement de liquides Withdrawn EP0293418A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5008/86 1986-12-17
CH5008/86A CH669185A5 (de) 1986-12-17 1986-12-17 Verfahren zum aufbereiten von fluessigkeiten.

Publications (1)

Publication Number Publication Date
EP0293418A1 true EP0293418A1 (fr) 1988-12-07

Family

ID=4286354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907734A Withdrawn EP0293418A1 (fr) 1986-12-17 1987-12-10 Procede de traitement de liquides

Country Status (4)

Country Link
EP (1) EP0293418A1 (fr)
AU (1) AU8327687A (fr)
CH (1) CH669185A5 (fr)
WO (1) WO1988004572A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10061890C2 (de) * 2000-12-12 2002-11-21 Deutsch Zentr Luft & Raumfahrt Vorrichtung zur Aufbereitung von Wasser, insbesondere zur Gewinnung von Trinkwasser, durch Behandlung mit Ozon
DE10246452B4 (de) * 2002-10-04 2007-12-27 Dinotec Gmbh Wassertechnologie Und Schwimmbadtechnik Reaktionsgefäß zur Aufbereitung von Wasser mit Ozon
CN102218166A (zh) * 2011-06-15 2011-10-19 广州市暨华医疗器械有限公司 用于血液透析设备的混合装置
CN111298161B (zh) * 2019-12-09 2021-11-16 河北华沃环保科技有限责任公司 基于臭氧的除臭杀菌装置设备及具有其的无臭垃圾房
PL3991832T3 (pl) * 2020-10-27 2024-03-04 Mba S.A. System i sposób wytwarzania cieczy z pęcherzykami gazu

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191122826A (en) * 1911-10-16 1912-04-04 Anders Andersen Pindstofte Improved Process for Impregnating Liquids with Carbonic Acid and Apparatus therefor.
US1907050A (en) * 1930-10-03 1933-05-02 William S Elliott Method and apparatus for removing air from liquids
DE1792299A1 (de) * 1968-08-16 1972-04-06 Niederrheinische Gas Und Wasse Verfahren zur Aufbereitung von Rohwasser
DE1907278A1 (de) * 1969-02-13 1970-08-27 Ludwik Smolski Verfahren und Vorrichtung zur Behandlung von Fluessigkeiten
BE756252A (fr) * 1969-09-17 1971-03-01 Procedes Sem Procede et appareil pour realiser le melange entre une phase gazeuse etune phase liquide
US3835039A (en) * 1972-12-22 1974-09-10 Cubic Corp Waste water treatment system
US3945918A (en) * 1974-01-10 1976-03-23 Airco, Inc. Methods and apparatus for treating a liquid with a gas
US4072613A (en) * 1976-10-04 1978-02-07 The United States Of America As Represented By The Secretary Of The Navy Ozone reactor for liquids
DE3231757A1 (de) * 1982-08-26 1984-03-01 Krupp-Koppers Gmbh, 4300 Essen Verfahren und vorrichtung zum abtreiben von freiem und gebundenen ammoniak aus diese beiden bestandteile enthaltenden waessrigen loesungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8804572A1 *

Also Published As

Publication number Publication date
CH669185A5 (de) 1989-02-28
AU8327687A (en) 1988-07-15
WO1988004572A1 (fr) 1988-06-30

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