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  2. Iron oxide adsorption - Wikipedia

    en.wikipedia.org/wiki/Iron_oxide_adsorption

    Arsenic is a common natural contaminant of well water and is highly carcinogenic. Iron oxide adsorption treatment for arsenic in groundwater is a commonly practiced removal process which involves the chemical treatment of arsenic species such that they adsorb onto iron oxides and create larger particles that may be filtered out of the water stream.

  3. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Brine draw: Water is directed through a jet pump, which pulls salt water from the brine tank, before the water and brine pass through the resin bed in the normal direction, if co-current, or in the reverse direction, if counter-current. [11] The output of this typically thirty-minute process is discarded through the drain hose.

  4. Water supply and sanitation in Guyana - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    In 2002 the Water and Sewerage Act was passed, which merged the Georgetown Sewerage and Water Commissioners (GS&WC) and the Guyana Water Authority (GUYWA), to form Guyana Water Inc. (GWI). [10] In January 2003 a performance-based five-year management contract was awarded to an international private operator, Severn Trent Water International (STWI).

  5. Lime softening - Wikipedia

    en.wikipedia.org/wiki/Lime_softening

    Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.

  6. Coagulation (water treatment) - Wikipedia

    en.wikipedia.org/wiki/Coagulation_(water_treatment)

    The coagulation-flocculation process can be used as a preliminary or intermediary step between other water or wastewater treatment processes like filtration and sedimentation. Iron and aluminium salts are the most widely used coagulants but salts of other metals such as titanium and zirconium have been found to be highly effective as well. [1] [2]

  7. Secondary treatment - Wikipedia

    en.wikipedia.org/wiki/Secondary_treatment

    The RBC process allows the wastewater to come in contact with a biological film in order to remove pollutants in the wastewater before discharge of the treated wastewater to the environment, usually a body of water (river, lake or ocean). A rotating biological contactor is a type of secondary (biological) treatment process.

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