Joseph Mathew (India)

MSc student

IHE Delft│Netherlands & AIT│Thailand

Phosphorus removal using algae bacterial in a photo-sequencing batch reactor (PSBR) (Netherlands)

My thesis deals with how to recover/recycle phosphorus in the mixed liquor of PSBR via precipitation in the form of calcium phosphate. This requires a high pH which in turn may affect the nitrifying biomass in the PSBR. My study investigated the effect of pH increase on nitrifying biomass by setting up two reactors, with controlled and uncontrolled conditions. My results show that nitrification took place in both sets of conditions. At a later stage algae grew and increased the pH, enabling the precipitation of phosphorus. My study demonstrates that biologically and chemically-induced phosphorus removal/recovery can be achieved in a reactor without affecting the nitrification process.

  • 2017│Phosphorus removal using an algae bacterial consortium in photo sequencing batch reactor (PSBR)
    MSc Thesis
    By Joseph Mathew
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