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  2. Facultative lagoon - Wikipedia

    en.wikipedia.org/wiki/Facultative_lagoon

    Facultative lagoon (polishing pond) providing tertiary treatment after a constructed wetland in Hamburg-Allermöhe, Germany. Overflow from the facultative lagoon may be routed through one or more polishing ponds supporting lower populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.

  3. Waste stabilization pond - Wikipedia

    en.wikipedia.org/wiki/Waste_stabilization_pond

    The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or reclaimed water ) if the effluent meets the required effluent standards (e.g. sufficiently low levels of pathogens ).

  4. How an algae-infested koi fish pond is deep cleaned - AOL

    www.aol.com/news/algae-infested-koi-fish-pond...

    Grass Roots Pond and Garden has been a family-run water-gardening business in southeast Michigan since 1973. Sam Bates walks us through how he safely relocates koi fish to dewater the pond for a ...

  5. Organisms involved in water purification - Wikipedia

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

    Biota are an essential component of most sewage treatment processes and many water purification systems. Most of the organisms involved are derived from the waste, wastewater or water stream itself or from the atmosphere or soil water. However some processes, especially those involved in removing very low concentrations of contaminants, may use ...

  6. Water aeration - Wikipedia

    en.wikipedia.org/wiki/Water_aeration

    Many water treatment processes use a variety of forms of aeration to support biological oxidative processes. A typical example is activated sludge which can use fine or coarse bubble aeration or mechanical aeration cones which draw up mixed liquor from the base of a treatment tank and eject it through the air where oxygen is entrained in the ...

  7. Recirculating aquaculture system - Wikipedia

    en.wikipedia.org/wiki/Recirculating_aquaculture...

    Outbreaks can be reduced by operating multiple independent systems with the same building and isolating water to water contact between systems by cleaning equipment and personnel that move between systems. [15] Also the use of an Ultraviolet (UV) or ozone water treatment system reduces the number of free floating virus and bacteria in the ...

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