YONGXiao-long,XUPing,ZHANGMeng,et al.Calcium Salt-based High-efficiency Phosphorus Removal and Recovery in Locally Enhanced Coagulation Reactor[J].China Water & Wastewater,2025,41(9):26-31.
Calcium Salt-based High-efficiency Phosphorus Removal and Recovery in Locally Enhanced Coagulation Reactor
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第9期
Page:
26-31
Column:
Date of publication:
2025-05-01
- Keywords:
- calcium salt-based phosphorus removal; locally enhanced coagulation reactor; phosphorus removal performance; phosphorus resource recovery
- Abstract:
- Phosphorus removal is a critical aspect of water pollution control, and the world is also facing the challenge of phosphorus resource depletion. Therefore, the development of technologies that simultaneously remove and recover phosphorus from wastewater is urgently needed. A locally enhanced coagulation (LEC) reactor with a partitioned structure was employed to investigate its performance in calcium salt-based phosphorus removal and recovery. The results showed that the LEC reactor achieved a high phosphorus removal efficiency, with a removal rate of up to （99.44±0.59）%, and residual phosphorus concentrations as low as （0.35±0.37） mg/L. The cost of phosphorus removal was as low as （1.05±0.02） yuan/kg. The phosphorus content in the precipitates reached 49.01% (as P2O5), with a crystallinity of 84.64%, indicating a high potential for phosphorus recovery. Further, a multidimensional evaluation system was established based on indicators such as phosphorus removal rate, residual concentration, removal cost, phosphorus content, and crystallinity. The results showed that the LEC reactor offered significant advantages in terms of efficient phosphorus removal and high phosphorus recovery potential.
Last Update:
2025-05-01