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  2. Chemical phosphorus removal - Wikipedia

    en.wikipedia.org/wiki/Chemical_phosphorus_removal

    Maintaining optimal pH is important for the removal of phosphorus from water. Phosphorus is most effectively removed at the neutral pH range, when the insoluble aluminum hydroxide is present. This hydroxide functions as a Lewis acid, [5] creating a flocculation environment similar to conventional wastewater treatment.

  3. John Oliver Memorial Sewer Plant - Wikipedia

    en.wikipedia.org/wiki/John_Oliver_Memorial_Sewer...

    The John Oliver Memorial Sewer Plant is a sewage treatment plant in Danbury, Connecticut, named after the British-American comedian and political satirist John Oliver.The plant was completely renovated in response to a 2008 order from state and federal agencies to address the inability of the existing sewage system to curtail phosphorus concentrations in wastewater, as well as other ...

  4. Reuse of human excreta - Wikipedia

    en.wikipedia.org/wiki/Reuse_of_human_excreta

    In the case of phosphorus in particular, reuse of excreta is one known method to recover phosphorus to mitigate the looming shortage (also known as "peak phosphorus") of economical mined phosphorus. Mined phosphorus is a limited resource that is being used up for fertilizer production at an ever-increasing rate, which is threatening worldwide ...

  5. Polyphosphate-accumulating organisms - Wikipedia

    en.wikipedia.org/wiki/Polyphosphate-accumulating...

    Therefore, wastewater treatment plants that operate for enhanced biological phosphorus removal have an anaerobic tank (where there is no nitrate or oxygen present as external electron acceptor) prior to the other tanks to give PAOs preferential access to the simple carbon compounds in the wastewater that is influent to the plant.

  6. Enhanced biological phosphorus removal - Wikipedia

    en.wikipedia.org/wiki/Enhanced_biological...

    Enhanced biological phosphorus removal (EBPR) is a sewage treatment configuration applied to activated sludge systems for the removal of phosphate. [ 1 ] The common element in EBPR implementations is the presence of an anaerobic tank ( nitrate and oxygen are absent) prior to the aeration tank.

  7. Wastewater treatment - Wikipedia

    en.wikipedia.org/wiki/Wastewater_treatment

    A so-called quarternary treatment step (sometimes referred to as advanced treatment) can also be added for the removal of organic micropollutants, such as pharmaceuticals. This has been implemented in full-scale for example in Sweden. [6] A large number of sewage treatment technologies have been developed, mostly using biological treatment ...

  8. Nutrient pollution - Wikipedia

    en.wikipedia.org/wiki/Nutrient_pollution

    Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients.It is a primary cause of eutrophication of surface waters (lakes, rivers and coastal waters), in which excess nutrients, usually nitrogen or phosphorus, stimulate algal growth. [1]

  9. Phosphoric acids and phosphates - Wikipedia

    en.wikipedia.org/wiki/Phosphoric_acids_and...

    The general formula of a phosphoric acid is H n−2x+2 P n O 3n−x+1, where n is the number of phosphorus atoms and x is the number of fundamental cycles in the molecule's structure; that is, the minimum number of bonds that would have to be broken to eliminate all cycles.