Enhanced sewage sludge treatment with struvite recovery

Proceedings

Enhanced sewage sludge treatment with struvite recovery

Alex Veltman

The Waternet, The Netherlands
(free)

At the WWTP Amsterdam West (in total 1,6 million people equivalent) with enhanced biological phosphorus removal massive scaling problems occurred after digestion of the primary and secondary sludge. The scaling was identified as struvite. Struvite is magnesium ammonium phosphate, a crystal with commercial value as a fertilizer. During the anaerobic digestion process biologically bound phosphorus is released into the liquid phase and with the present ammonium and magnesium levels struvite formation is very likely.

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Proceedings