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  2. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    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. Water treatment removes contaminants and undesirable ...

  3. Aquatic respiration - Wikipedia

    en.wikipedia.org/wiki/Aquatic_respiration

    Aquatic respiration. Sea slugs respire through a gill (or ctenidium) Aquatic respiration is the process whereby an aquatic organism exchanges respiratory gases with water, obtaining oxygen from oxygen dissolved in water and excreting carbon dioxide and some other metabolic waste products into the water.

  4. Water aeration - Wikipedia

    en.wikipedia.org/wiki/Water_aeration

    Water aeration is the process of increasing or maintaining the oxygen saturation of water in both natural and artificial environments. Aeration techniques are commonly used in pond, lake, and reservoir management to address low oxygen levels or algal blooms.

  5. Exhalation - Wikipedia

    en.wikipedia.org/wiki/Exhalation

    Exhalation (or expiration) is the flow of the breath out of an organism. In animals, it is the movement of air from the lungs out of the airways, to the external environment during breathing .

  6. Exhaled nitric oxide - Wikipedia

    en.wikipedia.org/wiki/Exhaled_nitric_oxide

    In medicine, exhaled nitric oxide (eNO) can be measured in a breath test for asthma and other respiratory conditions characterized by airway inflammation. Nitric oxide (NO) is a gaseous molecule produced by certain cell types in an inflammatory response. The fraction of exhaled NO (FE NO) is a promising biomarker for the diagnosis, follow-up and as a guide to therapy in adults and children ...

  7. Dissolved air flotation - Wikipedia

    en.wikipedia.org/wiki/Dissolved_air_flotation

    Dissolved air flotation ( DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin.

  8. Breathing - Wikipedia

    en.wikipedia.org/wiki/Breathing

    The breathing of all vertebrates with lungs consists of repetitive cycles of inhalation and exhalation through a highly branched system of tubes or airways which lead from the nose to the alveoli. [4] The number of respiratory cycles per minute is the breathing or respiratory rate, and is one of the four primary vital signs of life. [5] Under normal conditions the breathing depth and rate is ...

  9. In situ water treatment - Wikipedia

    en.wikipedia.org/wiki/In_situ_water_treatment

    In situ or direct dosing water treatment involves mixing and dosing chemical reagents directly into the affected water body for the treatment of a number of issues, instead of pumping water for treatment through a water treatment plant.

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