CA2145031A1 - Method and apparatus for in situ water purification including sludge reduction within water bodies by biofiltration and for hypolimnetic aeration of lakes - Google Patents

Method and apparatus for in situ water purification including sludge reduction within water bodies by biofiltration and for hypolimnetic aeration of lakes

Info

Publication number
CA2145031A1
CA2145031A1 CA002145031A CA2145031A CA2145031A1 CA 2145031 A1 CA2145031 A1 CA 2145031A1 CA 002145031 A CA002145031 A CA 002145031A CA 2145031 A CA2145031 A CA 2145031A CA 2145031 A1 CA2145031 A1 CA 2145031A1
Authority
CA
Canada
Prior art keywords
water
aeration
biofiltration
lakes
water body
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
CA002145031A
Other languages
French (fr)
Other versions
CA2145031C (en
Inventor
Karl F. Ehrlich
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.)
Aquaresearch Canada Ltd
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 CA2145031A1 publication Critical patent/CA2145031A1/en
Application granted granted Critical
Publication of CA2145031C publication Critical patent/CA2145031C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C02F7/00—Aeration of stretches of water
    • 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
    • C02F3/06—Aerobic processes using submerged filters
    • 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
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
    • 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)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

Disclosed are a method of the in situ purifi-cation by aeration and biofiltration, of water from lakes, bays, and aquacultural and within waste water treatment systems. In a first step, polluted, nutrient rich and/or oxygen deficient water is drawn, from with the water body, usually near the bottom, into a submerged chamber located near the surface of the water body, to cause the water to be oxygenated, in part, from three potential sources of oxygen, air used in the airlift to bring the water to the submerged chamber, then air diffused from the surface as the moving water is brought in contact with the atmosphere and finally from supplemental aeration diffused within the deeper portion of the submerged chamber so that the rising bubbles operate in a counter current manner to the water flow providing efficient gas exchange. In a second step, the water that has been oxygenated is passed through a biofilter comprising a filter bed made of filtering media, which is located within the water body. The filtering media may be preinoculated with beneficial micro-organisms and essential nutrients. Also disclosed is an apparatus for use to carry out this purification method. The same apparatus can also be used to provide hypolimnetic aeration within a lake without destratifying the water column outside the apparatus. It can further be used to draw organic sludge or sediments from the body of the water body and bring these solids in contact with a continuous or intermittent supply of microbial cultures specifically grown to optimize production of enzymes, which solubilize said organic sludge of sediment. Biochemical oxygen demand (BOD) generated by the sludge solubilization can then be treated by aeration and biological filtration. The apparatus for sludge solubilization is designed to avoid the suspension of solids in the water column beyond the limits of the apparatus.
CA 2145031 1994-03-23 1995-03-20 Method and apparatus for in situ water purification including sludge reduction within water bodies by biofiltration and for hypolimnetic aeration of lakes Expired - Lifetime CA2145031C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US216,273 1994-03-23
US08/216,273 US5549828A (en) 1994-03-23 1994-03-23 Method and apparatus for in Situ water purification including sludge reduction within water bodies by biofiltration and for hypolimnetic aeration of lakes

Publications (2)

Publication Number Publication Date
CA2145031A1 true CA2145031A1 (en) 1995-09-24
CA2145031C CA2145031C (en) 2002-05-28

Family

ID=22806436

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2145031 Expired - Lifetime CA2145031C (en) 1994-03-23 1995-03-20 Method and apparatus for in situ water purification including sludge reduction within water bodies by biofiltration and for hypolimnetic aeration of lakes

Country Status (2)

Country Link
US (1) US5549828A (en)
CA (1) CA2145031C (en)

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US6109358A (en) * 1999-02-05 2000-08-29 Conor Pacific Environmental Technologies Inc. Venting apparatus and method for remediation of a porous medium
DE102017221439A1 (en) 2016-12-14 2018-06-14 Anadolu Üniversitesi A NEW HYPOLIMETIC VENTILATION STRUCTURE WITH RENEWABLE ENERGY
CN113666506A (en) * 2021-09-14 2021-11-19 武汉中科水生环境工程股份有限公司 Method for positioning and planting submerged plants

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6109358A (en) * 1999-02-05 2000-08-29 Conor Pacific Environmental Technologies Inc. Venting apparatus and method for remediation of a porous medium
DE102017221439A1 (en) 2016-12-14 2018-06-14 Anadolu Üniversitesi A NEW HYPOLIMETIC VENTILATION STRUCTURE WITH RENEWABLE ENERGY
DE102017221439B4 (en) 2016-12-14 2020-01-23 Anadolu Üniversitesi HYPOLIMNETIC VENTILATION STRUCTURE WITH RENEWABLE ENERGY
CN113666506A (en) * 2021-09-14 2021-11-19 武汉中科水生环境工程股份有限公司 Method for positioning and planting submerged plants

Also Published As

Publication number Publication date
CA2145031C (en) 2002-05-28
US5549828A (en) 1996-08-27

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