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  2. 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.

  3. Waste pond - Wikipedia

    en.wikipedia.org/wiki/Waste_pond

    A waste pond or chemical pond is a small impounded water body used for the disposal of water pollutants, and sometimes utilized as a method of recycling or decomposing toxic substances. Such waste ponds may be used for regular disposal of pollutant materials or may be used as upset receivers for special pollution events.

  4. Recirculating aquaculture system - Wikipedia

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

    A biofilter and CO 2 degasser on an outdoor recirculating aquaculture system used to grow largemouth bass Water treatment processes needed in a recirculating aquaculture system. A series of treatment processes is utilized to maintain water quality in intensive fish farming operations. These steps are often done in order or sometimes in tandem.

  5. 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 ).

  6. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    Filters use sieving, adsorption, ion exchanges, biofilms and other processes to remove unwanted substances from water. Unlike a sieve or screen, a filter can potentially remove particles much smaller than the holes through which its water passes, such as nitrates or germs like Cryptosporidium.

  7. Algae bioreactor - Wikipedia

    en.wikipedia.org/wiki/Algae_bioreactor

    A close up of microalgae – Pavlova sp. An algae bioreactor is used for cultivating micro or macroalgae. Algae may be cultivated for the purposes of biomass production (as in a seaweed cultivator), wastewater treatment, CO 2 fixation, or aquarium/pond filtration in the form of an algae scrubber. [1]

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