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- W2893169557 abstract "Abstract BACKGROUND Potassium is a key macronutrient, but little attention has been paid to its recovery from waste streams. This study investigates simultaneous recovery of phosphorus and potassium in the form of potassium struvite (MgKPO 4 ·6H 2 O) from centrate after nitrogen removal by partial nitritation–anammox (PNA). Lab‐scale batch experiments to assess the influence of pH, Mg:P ratio and temperature on nutrient removal were conducted on effluent from two PNA reactors fed with centrate from municipal wastewater treatment plants. RESULTS pH had a strong impact on potassium removal, which increased up to pH 11. At this pH, a product containing 11.4% P, 3.51% N and 4.34% K was obtained. X‐ray diffraction confirmed the presence of potassium struvite together with ammonium struvite (MgNH 4 PO 4 .6H 2 O). PNA reduced the alkalinity by 90%, which surpasses the performance of conventional CO 2 stripping by aeration. CONCLUSION Coupling PNA with struvite precipitation allows for the recovery of N, P and K in a multi‐nutrient product and may drastically reduce the need for alkali dosing for pH control. © 2018 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry." @default.
- W2893169557 created "2018-10-05" @default.
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- W2893169557 date "2018-11-29" @default.
- W2893169557 modified "2023-10-13" @default.
- W2893169557 title "Potassium recovery from centrate: taking advantage of autotrophic nitrogen removal for multi-nutrient recovery" @default.
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- W2893169557 doi "https://doi.org/10.1002/jctb.5828" @default.
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