GB957750A - Surface aerator - Google Patents

Surface aerator

Info

Publication number
GB957750A
GB957750A GB4088861A GB4088861A GB957750A GB 957750 A GB957750 A GB 957750A GB 4088861 A GB4088861 A GB 4088861A GB 4088861 A GB4088861 A GB 4088861A GB 957750 A GB957750 A GB 957750A
Authority
GB
United Kingdom
Prior art keywords
blades
rotor
distance
pict
rotated
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.)
Expired
Application number
GB4088861A
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.)
Fuller Co
Original Assignee
Fuller Co
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 Fuller Co filed Critical Fuller Co
Publication of GB957750A publication Critical patent/GB957750A/en
Expired 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
    • C02F3/14—Activated sludge processes using surface aeration
    • C02F3/16—Activated sludge processes using surface aeration the aerator having a vertical axis
    • 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
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

In a method of and apparatus for the surface aeration of liquids an agitator rotor consisting of a disc 10 with depending blades 12 on a vertical shaft 11 is rotated at such speed and at such distance S below the quiescent level L of the liquid that the upper surface of the rotor becomes free of liquid and a standing wave or hydraulic jump is formed without the formation of spray. Air is entrained in the turbulence of the hydraulic jump and is sucked under the edge of the rotor into the low pressure zones behind the blades. Air may be further admitted to these zones by slots or holes 15 or tubes 16; it must not be allowed to enter the centre of the rotor. The area of each hole must be at least 8% of the area of the associated blade. The distance between the outer edges of the blades is preferably 0.8 to 5.0 times their width; the distance S and the height of the blades is not more than 3/10 the peripheral velocity head, and the width of the blades is not more than 1/4 the diameter of the rotor, which is rotated with a peripheral velocity of 10-20 f.p.s. An additional <PICT:0957750/C1/1> <PICT:0957750/C1/2> mixer, not depicted, may be used in the bottom of the container. The method and apparatus may be applied to the purification of sewage.
GB4088861A 1961-04-14 1961-11-15 Surface aerator Expired GB957750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10316761A 1961-04-14 1961-04-14

Publications (1)

Publication Number Publication Date
GB957750A true GB957750A (en) 1964-05-13

Family

ID=22293731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4088861A Expired GB957750A (en) 1961-04-14 1961-11-15 Surface aerator

Country Status (9)

Country Link
AT (1) AT251544B (en)
BE (1) BE616416A (en)
CH (1) CH418992A (en)
DE (1) DE1457329B1 (en)
DK (1) DK104395C (en)
ES (1) ES272954A1 (en)
FI (1) FI41642B (en)
GB (1) GB957750A (en)
SE (1) SE300592B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423077A (en) * 1966-06-17 1969-01-21 Yeomans Brothers Co Adjustable weir

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB679635A (en) * 1949-04-02 1952-09-24 Infilco Inc Improvements in or relating to an apparatus and process for treating polluted liquid
FR1233830A (en) * 1958-08-25 1960-10-12 Infilco Inc Advanced aerator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423077A (en) * 1966-06-17 1969-01-21 Yeomans Brothers Co Adjustable weir

Also Published As

Publication number Publication date
SE300592B (en) 1968-04-29
DE1457329B1 (en) 1971-09-23
DK104395C (en) 1966-05-09
CH418992A (en) 1966-08-15
BE616416A (en) 1962-10-15
FI41642B (en) 1969-09-30
ES272954A1 (en) 1962-07-01
AT251544B (en) 1967-01-10

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