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  2. Biological half-life - Wikipedia

    en.wikipedia.org/wiki/Biological_half-life

    Polonium in the body has a biological half-life of about 30 to 50 days. Caesium in the body has a biological half-life of about one to four months. Mercury (as methylmercury) in the body has a half-life of about 65 days. Lead in the blood has a half life of 28–36 days. [29] [30] Lead in bone has a biological half-life of about ten years.

  3. Tritiated water - Wikipedia

    en.wikipedia.org/wiki/Tritiated_water

    HTO has a short biological half-life in the human body of 7 to 14 days, which both reduces the total effects of single-incident ingestion and precludes long-term bioaccumulation of HTO from the environment. The biological half life of tritiated water in the human body, which is a measure of body water turn-over, varies with the season.

  4. Rotating biological contactor - Wikipedia

    en.wikipedia.org/wiki/Rotating_biological_contactor

    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.

  5. Aerated lagoon - Wikipedia

    en.wikipedia.org/wiki/Aerated_lagoon

    An aerated lagoon (or aerated pond) is a simple wastewater treatment system consisting of a pond with artificial aeration to promote the biological oxidation of wastewaters. [1] [2] [3] [4]

  6. Organisms involved in water purification - Wikipedia

    en.wikipedia.org/wiki/Organisms_involved_in...

    Sewage treatment plants mix these organisms as activated sludge or circulate water past organisms living on trickling filters or rotating biological contactors. [5] Aquatic vegetation may provide similar surface habitat for purifying bacteria, protozoa, and rotifers in a pond or marsh setting; although water circulation is often less effective.

  7. Chloramination - Wikipedia

    en.wikipedia.org/wiki/Chloramination

    Chloramination is the treatment of drinking water ... When a chemical or biological process ... of water by boiling is 26.6 minutes, whereas the half-life of ...

  8. Adsorption/bio-oxidation process - Wikipedia

    en.wikipedia.org/.../Bio-oxidation_process

    The adsorption/bio-oxidation process (AB process) is a two-stage modification of the activated sludge process used for wastewater treatment. It consists of a high-loaded A-stage and low-loaded B-stage. The process is operated without a primary clarifier, with the A-stage being an open dynamic biological system. Both stages have separate ...

  9. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    Dalecarlia Water Treatment Plant, Washington, D.C. Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment.