AU7764691A - Process for eliminating nitrates and phosphates in the biological purification of waste water - Google Patents

Process for eliminating nitrates and phosphates in the biological purification of waste water

Info

Publication number
AU7764691A
AU7764691A AU77646/91A AU7764691A AU7764691A AU 7764691 A AU7764691 A AU 7764691A AU 77646/91 A AU77646/91 A AU 77646/91A AU 7764691 A AU7764691 A AU 7764691A AU 7764691 A AU7764691 A AU 7764691A
Authority
AU
Australia
Prior art keywords
sludge
tank
anaerobic
waste water
stage
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.)
Abandoned
Application number
AU77646/91A
Inventor
Urs Baier
Paul Wyss
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.)
Utb Umwelttechnik Buchs AG
Original Assignee
Utb Umwelttechnik Buchs AG
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 Utb Umwelttechnik Buchs AG filed Critical Utb Umwelttechnik Buchs AG
Publication of AU7764691A publication Critical patent/AU7764691A/en
Abandoned 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
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • 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

Landscapes

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

Abstract

The raw waste water flowing into the activation tank (11) is aerated together with the sludge from the anaerobic intermediate stage (44) and then flows together with sludge flakes into the intermediate clarifying tank (13). There is thus a sludge circuit from the intermediate clarification tank (13) via the anaerobic intermediate stage (44) and the activation tank (11) back to the intermediate clarification tank (13). This results in a continuous interchange of anaerobic and aerobic medium conditions. In the anaerobic conditions in the anaerobic intermediate stage (44) the bacteria in the sludge give off phosphates, then in the subsequent aerobic phase increased quantities of phosphate are stored. The circuit described is not adversely affected by nitrites and nitrates because there are none of these substances which interfere with biological phosphorus elimination in the intermediate clarification tank (13). The anoxic preliminary stage (15) is important in eliminating nitrogen. To this stage are fed three components, i.e. oxygen-containing waste water with sludge flakes from the activation tank (17), clarification sludge from the post-clarification tank (19) and waste water from the intermediate clarification tank (13). Because of the high sludge concentration there is a shortage of oxygen which facilitates the reduction process by optionally aerobic bacteria. This reduction process reduces nitrites and nitrates to elementary nitrogen. The water flowing out of the plant via line (20) is largely free of phosphates and ammonium salts.
AU77646/91A 1990-05-18 1991-05-16 Process for eliminating nitrates and phosphates in the biological purification of waste water Abandoned AU7764691A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1691/90 1990-05-18
CH169190 1990-05-18

Publications (1)

Publication Number Publication Date
AU7764691A true AU7764691A (en) 1991-12-10

Family

ID=4216356

Family Applications (1)

Application Number Title Priority Date Filing Date
AU77646/91A Abandoned AU7764691A (en) 1990-05-18 1991-05-16 Process for eliminating nitrates and phosphates in the biological purification of waste water

Country Status (5)

Country Link
EP (1) EP0483312B1 (en)
AT (1) ATE109117T1 (en)
AU (1) AU7764691A (en)
DE (1) DE59102345D1 (en)
WO (1) WO1991017959A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69110002T2 (en) * 1990-10-27 1995-10-12 Kanegafuchi Chemical Ind Doll hair and doll.
NL9101917A (en) * 1991-11-18 1993-06-16 Tauw Infra Consult Bv METHOD FOR PURIFYING WASTE WATER, AND APPARATUS FOR USING THIS METHOD
EP0847963A3 (en) * 1996-12-13 1999-01-27 Böhnke, Botho, Prof. Dr.-Ing. Dr. h.c. mult. Process for operating a two-stage installation for purifying communal waste water and installation for carrying out the process
JP3307878B2 (en) * 1998-06-15 2002-07-24 神鋼パンテツク株式会社 Method and apparatus for treating organic wastewater
EP1426337B1 (en) * 2002-12-03 2011-03-09 Ford Global Technologies, LLC Process and plant for biological treatment of waste water
DE102006037223A1 (en) * 2006-08-09 2008-02-14 Krüger WABAG GmbH Method and device for the treatment of so-called food-waste-reject wastewaters and a use
CN111099726A (en) * 2018-10-29 2020-05-05 江苏力鼎环保装备有限公司 Synchronous denitrification and dephosphorization double-sludge sewage treatment system and treatment process thereof
EP4090634A1 (en) * 2020-01-17 2022-11-23 Bluetector AG Method and system for biologically treating highly concentrated wastewater
EP3851418A1 (en) * 2020-01-17 2021-07-21 Bluetector AG Method and system for biological treatment of highly concentrated waste water

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH621751A5 (en) * 1976-09-24 1981-02-27 Attisholz Cellulose Process for the biochemical purification of waste water containing organic constituents which favour the undesirable development of filamentous bacteria and/or the formation of bulking sludge
NL7702236A (en) * 1977-03-02 1978-09-05 Rijkslandbouwhogeschool PROCEDURE FOR THE REMOVAL OF ORGANIC SUBSTANCES AND NITROGEN COMPOUNDS FROM WASTE WATER.
DE3206440A1 (en) * 1982-02-23 1983-09-01 Linde Ag, 6200 Wiesbaden METHOD AND DEVICE FOR THE BIOLOGICAL PURIFICATION OF WATER CONTAINING PHOSPHATE
US4488968A (en) * 1983-03-07 1984-12-18 Air Products And Chemicals, Inc. Removal of phosphates and BOD from wastewaters

Also Published As

Publication number Publication date
EP0483312A1 (en) 1992-05-06
WO1991017959A1 (en) 1991-11-28
DE59102345D1 (en) 1994-09-01
ATE109117T1 (en) 1994-08-15
EP0483312B1 (en) 1994-07-27

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