FR2364861A1 - PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATER - Google Patents

PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATER

Info

Publication number
FR2364861A1
FR2364861A1 FR7727986A FR7727986A FR2364861A1 FR 2364861 A1 FR2364861 A1 FR 2364861A1 FR 7727986 A FR7727986 A FR 7727986A FR 7727986 A FR7727986 A FR 7727986A FR 2364861 A1 FR2364861 A1 FR 2364861A1
Authority
FR
France
Prior art keywords
sludge
phase
wastewater
oxygen addition
addition 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.)
Granted
Application number
FR7727986A
Other languages
French (fr)
Other versions
FR2364861B1 (en
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.)
Alfa Laval AB
Original Assignee
Alfa Laval AB
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 Alfa Laval AB filed Critical Alfa Laval AB
Publication of FR2364861A1 publication Critical patent/FR2364861A1/en
Application granted granted Critical
Publication of FR2364861B1 publication Critical patent/FR2364861B1/fr
Granted 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
    • 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
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Activated Sludge Processes (AREA)
  • Physical Water Treatments (AREA)
  • Centrifugal Separators (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'épuration biologique des eaux usées est effectuée selon la technique des boues activées, consistant à introduire les eaux usées dans au moins un étage d'addition d'oxygène, d'où un effluent liquide ayant une concentration de boues relativement faible est acheminé vers un groupe de séparation des boues qui est équipé de moyens pour renvoyer des boues extraites dans l'étage d'addition d'oxygène. L'effluent liquide de l'étage d'addition d'oxygène 1 est introduit dans un dispositif d'epaississement des boues 3 faisant partie du groupe de séparation des boues 2, où il est divisé d'une part en une phase de boues ayant une concentration relativement élevée de substances sèches, c'est-à-dire d'au moins 2 %, une fraction au moins de cette phase étant renvoyée dans l'étage d'addition d'oxygène 1 et, d'autre part, en une phase liquide qui est pratiquement dépourvue de boues, phase qui est envoyée dans un étage de clarification 4 où les boues résiduelles sont extraites de la phase liquide.Biological purification of wastewater is carried out using the activated sludge technique, which consists of introducing the wastewater into at least one oxygen addition stage, from which a liquid effluent having a relatively low sludge concentration is conveyed to a sludge separation unit which is equipped with means for returning the extracted sludge to the oxygen addition stage. The liquid effluent from the oxygen addition stage 1 is introduced into a sludge thickening device 3 forming part of the sludge separation group 2, where it is divided on the one hand into a sludge phase having a relatively high concentration of dry substances, that is to say at least 2%, at least a fraction of this phase being returned to the oxygen addition stage 1 and, on the other hand, in a liquid phase which is practically free of sludge, which phase is sent to a clarification stage 4 where the residual sludge is extracted from the liquid phase.

FR7727986A 1976-09-17 1977-09-16 PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATER Granted FR2364861A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7610325A SE7610325L (en) 1976-09-17 1976-09-17 PROCEDURE FOR CARRYING OUT BIOLOGICAL WASTE WATER TREATMENT

Publications (2)

Publication Number Publication Date
FR2364861A1 true FR2364861A1 (en) 1978-04-14
FR2364861B1 FR2364861B1 (en) 1980-04-30

Family

ID=20328905

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7727986A Granted FR2364861A1 (en) 1976-09-17 1977-09-16 PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATER

Country Status (6)

Country Link
CA (1) CA1084179A (en)
DE (1) DE2741021A1 (en)
FR (1) FR2364861A1 (en)
GB (1) GB1563160A (en)
IT (1) IT1087506B (en)
SE (1) SE7610325L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505314A1 (en) * 1981-05-07 1982-11-12 Shinryo Air Cond METHOD FOR IMPROVING THE VOLUME INDEX OF MIXED LIQUOR MUD IN A VENTILATION BASIN

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505314A1 (en) * 1981-05-07 1982-11-12 Shinryo Air Cond METHOD FOR IMPROVING THE VOLUME INDEX OF MIXED LIQUOR MUD IN A VENTILATION BASIN

Also Published As

Publication number Publication date
GB1563160A (en) 1980-03-19
IT1087506B (en) 1985-06-04
FR2364861B1 (en) 1980-04-30
DE2741021A1 (en) 1978-03-23
SE7610325L (en) 1978-03-18
CA1084179A (en) 1980-08-19

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Legal Events

Date Code Title Description
ST Notification of lapse