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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. 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.

  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. Cheaper across the border: Why Americans are heading to ... - AOL

    www.aol.com/cheaper-border-why-americans-heading...

    A 2022 Forbes Advisor survey of 2,000 dog and cat owners found nearly two-thirds say inflation has made it more difficult to pay a surprise vet bill. Bills less than $1,000 would cause 42% of pet ...

  6. 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.

  7. Phosphogypsum - Wikipedia

    en.wikipedia.org/wiki/Phosphogypsum

    Phosphogypsum is a by-product from the production of phosphoric acid by treating phosphate ore with sulfuric acid according to the following reaction: . Ca 5 (PO 4) 3 X + 5 H 2 SO 4 + 10 H 2 O → 3 H 3 PO 4 + 5 (CaSO 4 · 2 H 2 O) + HX