Method for phosphorus and fluorine separation, purification and resource utilization of high-concentration phosphorus and fluorine-containing wastewater

By generating influent datasets through online sampling and constructing candidate chemical treatment sequences, determining pH points and calcium salt addition order, the problem of phosphorus and fluoride mixed precipitation and blockage in the treatment of high-concentration phosphorus and fluoride wastewater was solved, achieving stable water pollution control and resource utilization.

CN122355445APending Publication Date: 2026-07-10SHANDONG HUANRUI ECOLOGICAL TECH CO LTD +1
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Patent Information

Application Number
CN202610364355.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the multi-stage physical and chemical treatment of high-concentration phosphorus and fluoride wastewater, how to determine the pH range and treatment sequence of chemical treatment under conditions of fluctuating influent batches and strong interference, so as to avoid blockage caused by mixed precipitation of phosphorus and fluoride and instability of resource products, and achieve the goal of water pollution control and treatment.

Method used

An influent dataset is generated through online sampling. The first and second pH points are determined based on a parallel control channel. Candidate chemical treatment sequences with different calcium salt addition orders are constructed. The target chemical treatment sequence is selected by calculating a comprehensive score based on the solid-liquid separation pressure difference growth rate, residual total phosphorus concentration, residual total fluoride concentration, and washing loss, thus achieving stable chemical treatment.

Benefits of technology

It effectively suppresses blockage and fluctuations in resource utilization products caused by mixed precipitation of phosphorus and fluorine, reduces the risk of water pollution, improves the controllability of separation and resource utilization pathways, and ensures the stability and traceability of continuous operation across multiple batches.

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Abstract

The invention discloses a method for phosphorus and fluorine separation, purification and resource utilization of high-concentration phosphorus-containing fluorine-containing wastewater, and particularly relates to the field of water pollution control and governance. The method comprises the following steps: carrying out on-line sampling on the high-concentration phosphorus-containing fluorine-containing wastewater to be treated, and measuring the total phosphorus concentration, the total fluorine concentration, the conductivity and the initial pH value; generating a water inlet data set based on a measured result; sample water is obtained based on flow division of the water inlet data set, and acid-base titration is performed on the sample water in the at least two parallel control channels to determine a first pH value point and a second pH value point. A first pH value point and a second pH value point are determined in a parallel control channel based on a water inlet data set, and candidate chemical treatment sequences of different calcium salt adding sequences are constructed; and calculating a comprehensive score according to the solid-liquid separation pressure difference growth rate, the residual total phosphorus concentration, the residual total fluorine concentration and the washing loss, selecting a target chemical treatment sequence, and performing solid-liquid separation and writing back a result according to the target chemical treatment sequence.
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