Research on intelligent chemical dosing control for phosphorus removal based on phosphate loading and dynamic molar ratio

ZHENG Kaikai; WANG Yan; WAN Xinyu; CHEN Yasong; LI Ji

doi:10.13205/j.hjgc.202509008

Volume 43 Issue 9

Sep. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(9): 66-71

ZHENG Kaikai, WANG Yan, WAN Xinyu, CHEN Yasong, LI Ji. Research on intelligent chemical dosing control for phosphorus removal based on phosphate loading and dynamic molar ratio[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 66-71. doi: 10.13205/j.hjgc.202509008

Citation:

ZHENG Kaikai, WANG Yan, WAN Xinyu, CHEN Yasong, LI Ji. Research on intelligent chemical dosing control for phosphorus removal based on phosphate loading and dynamic molar ratio[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 66-71. doi: 10.13205/j.hjgc.202509008

Citation:

ZHENG Kaikai, WANG Yan, WAN Xinyu, CHEN Yasong, LI Ji. Research on intelligent chemical dosing control for phosphorus removal based on phosphate loading and dynamic molar ratio[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 66-71. doi: 10.13205/j.hjgc.202509008

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Research on intelligent chemical dosing control for phosphorus removal based on phosphate loading and dynamic molar ratio

doi: 10.13205/j.hjgc.202509008

1. School of Environment and Ecology, Jiangnan University, Wuxi 214122, China;
2. Yangtze Eco-Environment Engineering Research Center, China Three Gorges Corporation, Wuhan 430014, China

Received Date: 2024-10-18
Available Online: 2025-11-05
Publish Date: 2025-09-01

Abstract

Abstract

With the gradual improvement of the total phosphorus standard for effluent， chemical phosphorus removal has become an indispensable process unit in wastewater treatment plants. To ensure the stable and compliant discharge of total phosphorus， the excessive addition of phosphorus removal chemicals is a common issue. However， few intelligent dosing schemes have demonstrated significant operational effects in practice. This paper took the deep phosphorus removal in the air flotation process section of an actual wastewater treatment plant as an example. It comprehensively considered the characteristics of large fluctuations in water quality and quantity during actual operation， established an intelligent dosing algorithm with phosphorus loading （kg/h） as the core control strategy， and conducted actual testing and analysis of PAC dosage under different phosphate concentrations. Moreover， a model for matching the key parameters of the dynamic Al/P molar ratio was established to calculate the PAC dosage in real time and control the flow output of the dosing pump. The results showed that the average chemical consumption of the intelligent phosphorus removal system decreased from 0.71 t per 10⁴ t of water to 0.45 t per 10⁴ t of water after operation， representing a significant reduction of 36.6%. The implementation of the system not only reduced the operating costs of the wastewater treatment plant but also decreased the residual metal ions in the receiving water body， generating significant economic and environmental benefits. It is of great significance for exploring low-carbon operation and refined control of wastewater treatment plants.
- phosphorus loading,
- molar ratio,
- intelligent dosing,
- phosphorus removal,
- chemical consumption

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References(12)

References

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