What question did this study set out to answer?

This research aims to explore the mechanisms and engineering implications of removing orthophosphate from wastewater using polyferric sulfate (PFS).

Comprehensive Study on the Removal of Orthophosphate in Domestic Wastewater by Polyferric Sulfate: Mechanism, Practical Engineering, and Biological Impact

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Comprehensive study demonstrates enhanced phosphorus removal in wastewater using polyferric sulfate, implying improved treatment efficiency.

This research aims to explore the mechanisms and engineering implications of removing orthophosphate from wastewater using polyferric sulfate (PFS).
Investigated chemical phosphorus removal mechanisms in a lab setting.
Validated engineering applicability of secondary PFS dosing in a full-scale wastewater treatment plant.
Examined the impact of PFS on microbial activity in an Anaerobic/Anoxic/Oxic (AAO) system.
Achieved a 30.6% increase in orthophosphate removal efficiency with secondary PFS dosing.
Achieved a 28.1% increase in removal efficiency with PFS-polyacrylamide codosing.
Clarified the FePO4 precipitation mechanism and its role in phosphorus removal.

Xiang et al. (2026) studied this question.

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Comprehensive study demonstrates enhanced phosphorus removal in wastewater using polyferric sulfate, implying improved treatment efficiency.