WO2002100783A1 - Traitement des eaux usees par boues activees - Google Patents

Traitement des eaux usees par boues activees Download PDF

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Publication number
WO2002100783A1
WO2002100783A1 PCT/SK2002/000011 SK0200011W WO02100783A1 WO 2002100783 A1 WO2002100783 A1 WO 2002100783A1 SK 0200011 W SK0200011 W SK 0200011W WO 02100783 A1 WO02100783 A1 WO 02100783A1
Authority
WO
WIPO (PCT)
Prior art keywords
activation
tank
aero
waste water
activation tank
Prior art date
Application number
PCT/SK2002/000011
Other languages
English (en)
Inventor
Ján KURILEC
Original Assignee
Kurilec Jan
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 Kurilec Jan filed Critical Kurilec Jan
Publication of WO2002100783A1 publication Critical patent/WO2002100783A1/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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1252—Cylindrical tanks with horizontal axis
    • 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 invention concerns a method of the communal waste water treatment by the activation with partial sludge stabilisation, nitrogen and phosphorus removal, and an aero- selector for realisation of this method.
  • the objectives of the invention are the simplification of the technological process of treatment, the decrease of capital and operating costs, and providing of higher ground and surface water protection. Description of the invention
  • This invention deals with a method of waste water treatment in small and medium waste water treatment plants.
  • the waste water after an optional removal of coarse materials and/or the waste water from the associated anaerobic area is recycled through the oxic and anoxic part of activation by the help of the escaped air bubbles created after introduction of air into the aeration device in the aeration tank.
  • Simultaneously sediments from the sedimentation tank are washed out into the activation tank and so this method does not need the sludge recycling from the sedimentation tank.
  • the outlet water flowing in the lower part of the sedimentation tank through the degassing area creates a floes cloud.
  • Gases and potential denitrification products can escape via degassing area into the sedimentation tank while the floes cloud has positive influence on the sedimentation efficiency. Because it is not necessary to increase the waste water influent to the sedimentation tank to balance the volume of removed recycled water, it is not necessary to increase the sedimentation tank volume.
  • the air escaping from the aeration device and the optimal velocity of recycled water create a water jump on the slot what allows pumping of activation mixture into sludge area or into the anaerobic area at phosphorus removal.
  • the water jump causes an elevation of the level and recycling of the activated water by the outer recycling i.e. out of the activation tank as a result of hydrodynamic levels difference. This is the reason why the demands on the pumping - outer recycling by excluding forced sludge recycling from the sedimentation tank - are substantially lower compared to the current methods of the diluted sludge water removal from the sedimentation tank.
  • the pumping demands are influenced only by the necessity of the maintenance of the required dry matter concentration in the activation tank and by the requirement for activated sludge loading into the anaerobic area at phosphorus removal.
  • the activating mixture is loaded into the anaerobic area.
  • the cleaned waste water is discharged from the sedimentation tank into a recipient via the collecting channel.
  • the aero-selector consists of a cylindrical, horizontal activation tank with a connected sedimentation tank.
  • the bottom area of the sedimentation tank opens radially into the lower half of the activation tank and this inlet zone is adapted to the sedimentation degassing by a degassing area.
  • the activation tank is equipped inside with an aeration device assigned for the aeration and recycling of the activation mixture.
  • the location of the aeration device influences the mutual relation between the energy demand of the aeration, the delivered air amount and the concurrence of the aeration intensity by the water jump. Therefore is it favourable when the aeration device is arranged eccentrically to the vertical axis of the activation tank in the direction of the activation mixture flow.
  • the aeration device fulfils the function of a submerged aeration cylinder in such designed aero-selector.
  • the activation tank is equipped with an upper opening situated along the activation tank in the highest point of its wall.
  • the slot created between the inner wall of the activation tank and the plate-shaped part joins the upper opening.
  • the cylindrical sludge carrier with at least one opening into the activation tank.
  • the substantial part of the accumulated sludge will actively participate in the cleaning process.
  • the inlet and outlet of the activation mixture from the sludge carrier can be variable, e.g. opened from above with the upper inlet and outlet, with occasional evacuation of the stabilised concentrated sludge, or with the lower inlet and upper outlet through a small slot with the automatic drain of excessive sludge.
  • the design of the aero-selector allows covering the part of the activation tank in the relatively simple way to prevent its cooling during colder seasons and in colder regions.
  • the advantage of the invention is that there is not necessary to recycle the sludge from the sedimentation tank and to increase the inlet into the sedimentation tank by the amount of recycled water.
  • the further advantage is that the method of the cleaning using the aero-selector does not demand further technological equipment for performing the inner and outer recycling, because of washing out of the sediments from the associated sedimentation tank. In larger waste water treatment plants the scrapping of the sludge will be excluded.
  • the cylindrical carrier enables to achieve the high sludge age in the carrier and thereby in the activation tank as well, what considerably reduces the influence of outer recycling on the sludge age, and consequently has a positive influence on the cleaning process sensitivity.
  • the use of the sludge carrier creates selective conditions for the suppression of filamentous micro-organisms growth, reduction of power demand for the air supply by recycling and aerating of the waste water volume decreased by the sludge carrier volume, and eventually for the anaerobic condition improvement in the sludge carrier needed for the phosphorus reduction.
  • the invented method of treatment by the aero-selector allows to reach the cleaning efficiency from 90 to 98 %.
  • the invention is further explained by the help of the attached figures.
  • the cross- section of the aero-selector is shown in the fig.1 and the ground plan of the waste water treatment plant with a separate anaerobic area in the fig.2.
  • the fig.3 shows the cross-section of the aero-selector with the sludge carrier and the fig.4 shows the ground plan of the waste water treatment plant with aero-selector and sludge carrier. Examples of application of the invention
  • the aero-selector shown in fig. 1 is characterised by its cylindrical horizontal activation tank 1 with the connected sedimentation tank 2.
  • the bottom area of the sedimentation tank opens radially to the area of the lower half part of the activation tank i and this opening zone is adapted to the sedimentation degassing.
  • the activation tank 1 is equipped inside with an aeration device 8 designed for aeration and recycling of the activation mixture.
  • the aeration device is arranged eccentrically to the vertical axis 4 of the activation tank i in the direction of the activation mixture flow.
  • the activation tank I is equipped with an upper opening 5 constructed along the activation tank I in the highest point of its wall.
  • the collection channel 1_1 is adjoined to the upper opening 5, and a slot 7 created between the inner wall of the activation tank I and the plate-shaped part 6 opens into it.
  • the activation tank I wall in the area of the plate-shaped part 6 location constitutes a straight section 3.
  • the difference between the aero-selector shown in fig.3 and the aero-selector shown in fig.l is that the cylindrical sludge carrier 9 with one opening is installed into the activation tank I.
  • the method of waste water treatment by the help of the aero-selector shown in fig.l is clear from the fig.2.
  • the method of the waste water treatment by the aero-selector shown in the fig. 3 and 4 is the same as the method of treatment by the aero-selector shown in the fig. 1 and 2. The only difference is that the sludge carrier 9 with an upper opening is inserted into the activation tank i and that the treatment does not have a separate anaerobic area.
  • the cylindrical sludge carrier 9 provides a high sludge age in the carrier as well as in the activation tank 1. This considerably reduces the influence of the outer recycling 16 on the sludge age with the final favourable effect on the cleaning process sensitivity.
  • Using the sludge carrier 9 creates selective conditions for the suppressing the growth of filamentous micro-organisms, for the decreasing of power demand of the air supply by recycling and aerating of the water volume decreased by the volume of sludge carrier 9, and optionally for the anaerobic conditions in the sludge carrier 9 needed for the phosphorus reduction.
  • the method of waste water cleaning by the aero-selector is suitable for small to medium waste water treatment plants.

Landscapes

  • 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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

L'invention concerne un appareil pour le traitement des eaux usées. Cet appareil est constitué d'un réservoir d'activation horizontal (1) sur lequel est connecté un réservoir de sédimentation (2) dont la partie de fond s'ouvre radialement sur la partie inférieure du réservoir d'activation (1), cette zone d'ouverture étant conçue pour le dégazage de sédimentation. Le réservoir d'activation (1) est équipé à l'intérieur d'un dispositif d'aération (8) pour le recyclage et l'aération du mélange d'activation et d'une ouverture supérieure (5) créée le long du réservoir d'activation (1) au point le plus élevé de sa paroi. La fente (7) créée entre la paroi intérieure du réservoir d'activation (1) et de la partie en forme de plaque (6) peut se terminer dans l'ouverture (5). Le réservoir d'activation (1) peut être équipé d'un transporteur de suspension boueuse (9) de forme cylindrique pourvu d'au moins une ouverture.
PCT/SK2002/000011 2001-06-11 2002-06-10 Traitement des eaux usees par boues activees WO2002100783A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SKPP0807-2001 2001-06-11
SK807-2001A SK8072001A3 (en) 2001-06-11 2001-06-11 The method of waste water treatment and the aero-selector for the realisation of this method

Publications (1)

Publication Number Publication Date
WO2002100783A1 true WO2002100783A1 (fr) 2002-12-19

Family

ID=20435918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SK2002/000011 WO2002100783A1 (fr) 2001-06-11 2002-06-10 Traitement des eaux usees par boues activees

Country Status (2)

Country Link
SK (1) SK8072001A3 (fr)
WO (1) WO2002100783A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005056484A1 (fr) * 2003-12-09 2005-06-23 Ole Feldthaus Petite installation biologique de traitement de eaux usees
EP1923461A1 (fr) 2006-11-15 2008-05-21 Millipore Corporation Biréacteur
CN107879568A (zh) * 2017-12-25 2018-04-06 云南今业生态建设集团有限公司 一种制药废水的微电解处理工艺
PL424861A1 (pl) * 2018-03-13 2019-09-23 Rafał Lusina Biologiczna oczyszczalnia ścieków

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348687A (en) * 1965-03-31 1967-10-24 Union Tank Car Co Sewage treatment system
US4139457A (en) * 1975-09-03 1979-02-13 Agrotechnika, Narodny Podnik Method of and apparatus for purifying waste water
GB1561573A (en) * 1977-01-28 1980-02-27 Romo Np Reactor for the continuous biological purification of sewage water

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348687A (en) * 1965-03-31 1967-10-24 Union Tank Car Co Sewage treatment system
US4139457A (en) * 1975-09-03 1979-02-13 Agrotechnika, Narodny Podnik Method of and apparatus for purifying waste water
GB1561573A (en) * 1977-01-28 1980-02-27 Romo Np Reactor for the continuous biological purification of sewage water

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005056484A1 (fr) * 2003-12-09 2005-06-23 Ole Feldthaus Petite installation biologique de traitement de eaux usees
EP1923461A1 (fr) 2006-11-15 2008-05-21 Millipore Corporation Biréacteur
CN107879568A (zh) * 2017-12-25 2018-04-06 云南今业生态建设集团有限公司 一种制药废水的微电解处理工艺
PL424861A1 (pl) * 2018-03-13 2019-09-23 Rafał Lusina Biologiczna oczyszczalnia ścieków

Also Published As

Publication number Publication date
SK8072001A3 (en) 2003-03-04

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