Wastewater biorefineries
Exploring biological phosphorus removal and integrated recovery solutions
Samarpita Roy (TU Delft - BT/Environmental Biotechnology)
Jette F. Petersen (Aalborg University)
Sarah Müller (RWTH Aachen University)
Zivile Kondrotaite (Aalborg University)
Mark M.C. van Loosdrecht (Aalborg University, TU Delft - BT/Environmental Biotechnology)
Thomas Wintgens (RWTH Aachen University)
P. H. Nielsen (Aalborg University)
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Abstract
The emphasis on phosphorus removal and recovery from wastewater treatment plants has intensified in recent years due to the urgent need to reduce dependency on nonrenewable phosphorus reserves. Enhanced biological phosphorus removal (EBPR), driven by a diverse community of polyphosphate-accumulating organisms with distinct metabolic capabilities, offers several advantages over chemical precipitation methods. These benefits include reduced chemical use, lower sludge volumes, decreased reliance on costly chemical precipitants, and improved phosphorus recovery quality. Recent advancements in recovery technologies now enable efficient phosphorus extraction from digester supernatant, dewatered digested sewage sludge, and sewage sludge ash, each yielding different recovery efficiencies. Despite these advances, a comprehensive assessment of the phosphorus recovery potential from these target streams in conjunction with EBPR remains crucial and has yet to be fully explored.
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File under embargo until 10-08-2025