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Smart Chemical Dosage and Phosphorus RemovalControl System

Solution

Solution
Smart Chemical Dosage and Phosphorus RemovalControl System

To meet the core needs of TP standards in effluent and chemical cost control in wastewater treatment plants, our intelligent dosing and phosphorus removal system was developed. The system consists of an influent flow meter, an online monitor for orthophosphate at the inlet, an online monitoring device for total phosphorus in the plant effluent, a dosing pump, an intelligent dosing control cabinet, and a program software control module. Based on dynamic linkage control of inlet and outlet indicator data from the municipal sewage treatment plant, it adopts a closed-loop control model of "feedforward + backfeed" to achieve automatic intelligent dosing of phosphorus removers and precise control throughout the entire process.


Pain Points
● High proportion of energy consumption
Traditional aeration lacks precise regulation, and the energy consumption of biological wastewater treatment (mainly aeration and oxygen supply) accounts for 50%-70% of the total energy consumption of water plants, far exceeding wastewater lifting and sludge treatment, becoming the main obstacle to cost reduction and efficiency improvement.
● Low degree of automation
Manual control requires high professional competence from operators, relying on manual operation and judgment, making full-process automated management impossible.
● Poor water outlet stability
Manual dosing can easily cause fluctuations in effluent TP, making it difficult to ensure water quality remains stable and compliant.
● Lag in response speed
Traditional models cannot quickly respond to water quality impact loads, and process adjustments lack timely efficiency.

Principle of Intelligent Control

This control system centers on a dual control mode of "feedforward prediction + feedforward correction," comprehensively considering multiple factors such as influent volume, influent positive phosphorus concentration, sludge return flow in secondary sedimentation tank, total effluent phosphorus concentration, and temperature, to construct an accurate mechanistic model. At the same time, the model deeply integrates diverse AI algorithms such as random forests and linear regression, continuously self-optimizing through data analysis. Relying on the execution of the intelligent dosing control cabinet, the system achieves precise and intelligent regulation of phosphorus removal agent dosage, ensuring stable and compliant effluent while considering economic efficiency.

● Feedforward control: real-time linkage for early regulation

The system uses a built-in software control system in the intelligent dosing control cabinet to receive real-time flow data transmitted by the front-end inlet flow meter and instantaneous concentration data fed back by the orthophosphate detector. After precise calculations by the system's logic algorithms, the operating parameters of the dosing pump frequency converter are automatically adjusted, dynamically adjusting the dosing pump's dosing volume, achieving feedforward control with a dual-parameter linkage of "influent flow rate + influent phosphorus concentration," ensuring that dosing amount matches precisely with the load of influent pollutants, avoiding chemical waste or insufficient dosing.
● Feed-in control: precise correction and stable compliance

The plant's effluent phosphorus meter transmits effluent phosphorus indicator data in real time to the intelligent dosing control software system. After system logic analysis, if the effluent phosphorus deviates from the target control value, the system automatically calculates the dosing amount correction value and dynamically adjusts the dosing pump frequency converter. The flow meter installed on the dosing pipeline provides real-time feedback on the actual dosing flow, assisting the software system in verifying dosing accuracy, forming a closed-loop control system of "monitoring-calculation-adjustment-verification," ultimately achieving optimal dosing of phosphorus removal agents and ensuring that the total phosphorus discharge in effluent continues to meet standards and is stable.

 

Technical Features

● Short-range phosphorus chemical reaction process model

Innovatively establishing a short-range phosphorus chemical reaction process model, the traditional full-process, complex, and delayed automatic dosing modeling is streamlined to focus on the chemical phosphorus removal section, greatly improving the relevance and precision of dosing control.

● Accurately capture affected sections

Precisely pinpoint the critical impact sections from the biochemical tank outlet to the secondary sedimentation tank outlet, clarify the core dosing control scope, avoid ineffective dosing operations, and achieve efficient focus of the dosing process.

● Complete signal feedback mechanism

A comprehensive "feedforward + backfeed" signaling closed-loop system has been established, allowing real-time dynamic adjustment of dosing dosage based on water quality changes, ensuring sustained and stable phosphorus removal and controllable effluent indicators.

● Optimized control of interference parameters

By reducing interference parameters, the reaction process exhibits highly linear characteristics, significantly improving dosing control accuracy, effectively lowering drug consumption costs, and achieving dual optimization of economy and efficiency.

● Model self-evolution

By combining historical operational data and applying various machine learning algorithms such as random forests and linear regression, a self-optimizing intelligent dosing model is constructed. Through continuous learning and evolution, the model continuously improves the accuracy of dosing control, thereby achieving optimized dosing efficiency and ongoing cost reduction.


Core Features

1. Precise dosage calculation

● Relying on the signal acquisition module, core data such as influent flow rate, influent orthophosphate concentration, and total effluent phosphorus concentration are collected in real time, using the intelligent control principle of "feedforward prediction + feed-in correction + process model."

● Combining influent flow rate with orthophosphate concentration, dynamic dosing volume matching is achieved through a 0-100% adjustable frequency converter (with communication signal) for phosphate removers.

● Models are constructed by integrating parameters such as phosphorus content and pH, leveraging artificial neural network deep learning. Through multi-step prediction, rolling optimization, and feedback correction, precise correspondence between dosing amounts and variables is clarified, producing milliliter-level precise dosing volumes to ensure stable effluent response to load fluctuations.

2. Intelligent control throughout the entire process

● Automated control of the entire process process through a software platform, with the dosing stage driven by the dosing pump frequency converter, fully automated.

● The equipment side can automatically switch fault units, enabling comprehensive diagnostics, data analysis, fault prediction, and alarms of equipment operation, chemical consumption, and water quality, creating an unattended intelligent dosing system.

3. Abnormal early warning and intelligent fault diagnosis

● Based on dual logic of "data threshold judgment + trend analysis," it monitors key data such as influent orthophosphate concentration, total effluent phosphorus concentration, and dosing pump frequency in real time.

● Proactively identify process risks and locate equipment faults, significantly reducing manual inspection pressure and accident losses, ensuring continuous and stable system operation.

4. Data management and visualization analysis

● Integrates full-process data from the signal acquisition module to form traceable and analyzable digital archives.

● Supports real-time display and historical retrieval of data curves such as influent flow, influent orthophosphate concentration, total effluent phosphorus concentration, phosphorus remover dosing flow, and dosing pump frequency, providing intuitive data support for process optimization and management decision-making.

5. Multi-mode operation adaptation

● Supports manual control mode and remote manual control mode.

● Equipped with remote automatic control mode: automatically calculates and runs according to preset algorithms and collected data.

● Supports semi-automatic operation: Based on the set K value (phosphorus remover dosing amount, unit: mg/L), the dosing flow rate is calculated using the formula "K× influent flow ÷phosphorus remover density" and then executed.


Customer Value

 

 

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Customer Service Hotline: 400-668-8627

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Email: fgwater@fuguang.com

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