CA2105650A1 - Slow sand filter for use with intermittently flowing water supply and method of use thereof - Google Patents

Slow sand filter for use with intermittently flowing water supply and method of use thereof

Info

Publication number
CA2105650A1
CA2105650A1 CA002105650A CA2105650A CA2105650A1 CA 2105650 A1 CA2105650 A1 CA 2105650A1 CA 002105650 A CA002105650 A CA 002105650A CA 2105650 A CA2105650 A CA 2105650A CA 2105650 A1 CA2105650 A1 CA 2105650A1
Authority
CA
Canada
Prior art keywords
water
filter
level
sand
slow sand
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
CA002105650A
Other languages
French (fr)
Other versions
CA2105650C (en
Inventor
David H. Manz
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.)
PURE FILTERED WATER Ltd
Original Assignee
University Technologies International Inc
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 University Technologies International Inc filed Critical University Technologies International Inc
Priority to CA002105650A priority Critical patent/CA2105650C/en
Publication of CA2105650A1 publication Critical patent/CA2105650A1/en
Application granted granted Critical
Publication of CA2105650C publication Critical patent/CA2105650C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/12—Downward filtration, the filtering material being supported by pervious surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/38—Feed or discharge devices
    • B01D24/40—Feed or discharge devices for feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/38—Feed or discharge devices
    • B01D24/42—Feed or discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/48—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
    • B01D24/4869—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration by level measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/48—Overflow systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

An intermittently operating slow sand filter uses the damming of water in a raised pipe to provide a constant level of water in a slow sand filter container. The container includes a water inlet and outlet, and is partially filled with sand or other filter material. A pipe from the water outlet in the slow sand filter is raised upward to the desired level of water over the sand before descending to a water reservoir. Water backs up in the pipe and the container to the desired level above the top of the sand, even when the flow of water is intermittent. The schmutzdeuke forms at the top of the filter medium.
The water level in such a manually operated slow sand filter, using fine quartz sand as the filter medium, and at ambient temperatures (about 21°C) is maintained above about 1 cm above the top of the filter medium and below about 8 cm above the top of the slow sand filter. In another intermittently operating slow sand filter, the water level is controlled automatically when not being used at a desired maintenance level, and otherwise is kept in a desired range of levels above the top of the sand (or other filter material) in a partially filled container. Automatic control is provided by a control system that senses the water level in the slow sand filter. The supply of water may be from a pump or from a gravity flow controlled by a valve. The water from the automatic intermittently operating slow sand filter is supplied to a reservoir.
Water level in the reservoir may also be controlled within a desired range using upper and lower level limit detectors and a valve on an outlet line from the container to the reservoir.
CA002105650A 1993-09-07 1993-09-07 Slow sand filter for use with intermittently flowing water supply and method of use thereof Expired - Lifetime CA2105650C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002105650A CA2105650C (en) 1993-09-07 1993-09-07 Slow sand filter for use with intermittently flowing water supply and method of use thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002105650A CA2105650C (en) 1993-09-07 1993-09-07 Slow sand filter for use with intermittently flowing water supply and method of use thereof

Publications (2)

Publication Number Publication Date
CA2105650A1 true CA2105650A1 (en) 1995-03-08
CA2105650C CA2105650C (en) 2005-08-02

Family

ID=4152272

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002105650A Expired - Lifetime CA2105650C (en) 1993-09-07 1993-09-07 Slow sand filter for use with intermittently flowing water supply and method of use thereof

Country Status (1)

Country Link
CA (1) CA2105650C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021635A1 (en) * 1998-10-09 2000-04-20 University Technologies International Inc. Slow sand filter for use with intermittently flowing water supply and method of use thereof
US6953525B2 (en) 2002-05-28 2005-10-11 Ms Filter Inc. Potable water treatment plant and method of maintaining same
US8123941B2 (en) 2005-01-17 2012-02-28 H2O World Wide Water Solutions Pty Ltd. Sand filter and method of constructing same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021635A1 (en) * 1998-10-09 2000-04-20 University Technologies International Inc. Slow sand filter for use with intermittently flowing water supply and method of use thereof
AU770016B2 (en) * 1998-10-09 2004-02-12 University Technologies International Inc. Slow sand filter for use with intermittently flowing water supply and method of use thereof
US6953525B2 (en) 2002-05-28 2005-10-11 Ms Filter Inc. Potable water treatment plant and method of maintaining same
US7258798B2 (en) 2002-05-28 2007-08-21 Ms Filter Inc. Potable water treatment plant and method of maintaining same
US8123941B2 (en) 2005-01-17 2012-02-28 H2O World Wide Water Solutions Pty Ltd. Sand filter and method of constructing same

Also Published As

Publication number Publication date
CA2105650C (en) 2005-08-02

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Legal Events

Date Code Title Description
EEER Examination request