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Prevention of struvite scaling in digesters combined with phosphorus removal and recovery—The FIX-Phos Process

Petzet, Sebastian ; Cornel, Peter (2012)
Prevention of struvite scaling in digesters combined with phosphorus removal and recovery—The FIX-Phos Process.
In: Water Environment Research, 84 (3)
doi: 10.2175/106143012X13347678384125
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

The fixation of phosphorus (FIX-Phos) combines struvite prevention and phosphorus recovery by the addition of calciumsilicatehydrate (CSH) particles into the anaerobic digester. The CSH fixates phosphorus as calcium phosphate and reduces the phosphorus concentration in the sludge water that allows for control of struvite formation. The phosphorus-containing recovery product can be separated and recovered from the digested sludge. In pilot plant experiments, 21% to 31% of phosphorus contained in digested sludge could be recovered when CSH was added at concentrations of 2 g/L to 3.5 g/L to a mixture of primary sludge and waste activated sludge (WAS) from enhanced biological phosphorus removal. The recovery product contained few heavy metals and a phosphorus content of 18 wt % P2O5, which allows for recycling as fertilizer. The fixation of phosphorus within the digester may increase wastewater sludge dewaterability. The phosphorus recycle stream to the headworks of the wastewater treatment plant is reduced.

Typ des Eintrags: Artikel
Erschienen: 2012
Autor(en): Petzet, Sebastian ; Cornel, Peter
Art des Eintrags: Bibliographie
Titel: Prevention of struvite scaling in digesters combined with phosphorus removal and recovery—The FIX-Phos Process
Sprache: Englisch
Publikationsjahr: 1 März 2012
Verlag: Water Environment Federation
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Water Environment Research
Jahrgang/Volume einer Zeitschrift: 84
(Heft-)Nummer: 3
DOI: 10.2175/106143012X13347678384125
Kurzbeschreibung (Abstract):

The fixation of phosphorus (FIX-Phos) combines struvite prevention and phosphorus recovery by the addition of calciumsilicatehydrate (CSH) particles into the anaerobic digester. The CSH fixates phosphorus as calcium phosphate and reduces the phosphorus concentration in the sludge water that allows for control of struvite formation. The phosphorus-containing recovery product can be separated and recovered from the digested sludge. In pilot plant experiments, 21% to 31% of phosphorus contained in digested sludge could be recovered when CSH was added at concentrations of 2 g/L to 3.5 g/L to a mixture of primary sludge and waste activated sludge (WAS) from enhanced biological phosphorus removal. The recovery product contained few heavy metals and a phosphorus content of 18 wt % P2O5, which allows for recycling as fertilizer. The fixation of phosphorus within the digester may increase wastewater sludge dewaterability. The phosphorus recycle stream to the headworks of the wastewater treatment plant is reduced.

Fachbereich(e)/-gebiet(e): 13 Fachbereich Bau- und Umweltingenieurwissenschaften
13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung
13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung > Fachgebiet Abwassertechnik
Hinterlegungsdatum: 13 Jul 2017 06:56
Letzte Änderung: 03 Jun 2018 21:28
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