Project Gallery
Municipal Wastewater Treatment Plant Automation
PLC & VFD Control System
Project Background & Environmental Significance
With rapid global population growth and increasing industrial activity, water pollution has become a critical environmental challenge. Governments worldwide are placing strong emphasis on river protection, wastewater treatment efficiency, and sustainable water management.
This project was developed for a municipal government–owned large-scale wastewater treatment plant, designed to improve water quality through advanced automation, precise chemical dosing, and centralized monitoring. The objective was to achieve stable operation, regulatory compliance, and long-term environmental sustainability.
Project Overview | Large-Scale Municipal Wastewater Automation
Weimiao Control Panels was commissioned to deliver a complete industrial automation and control solution for this wastewater treatment facility, covering the entire process from chemical dosing to final water purification.
The project scope included:
PLC control panels for process automation
PLC + VFD control panels for pumps and mixers
Chemical dosing, storage, and agitation systems
Large-capacity pumping and flow control
Central control room with SCADA / HMI monitoring
All systems were custom-engineered to match the plant’s process flow, equipment layout, and long-term operational requirements.
Integrated Automation & Control System Architecture
PLC Control Panels | PLC + VFD Panels | Industrial Automation Solutions | Wastewater Treatment Control Systems
PLC Control Panels for Accurate Chemical Dosing
At the initial stage of wastewater treatment, precise chemical dosing is essential to ensure effective purification.Weimiao designed and manufactured PLC control panels to handle:
Automatic calculation of chemical dosing ratios
Control of dosing pumps and process sequences
Continuous monitoring of liquid levels and flow rates
Stable and safe execution of chemical treatment processes
Each PLC program was custom-developed based on actual operating conditions, ensuring accuracy, repeatability, and reliability.
PLC + VFD Systems for Mixing and Pump Control
After chemicals are transferred into storage tanks, PLC + VFD control panels manage the mixing and pumping processes to ensure uniform chemical concentration before treatment.
Key functions include:
Variable speed control of mixing motors
Precise regulation of pump flow and pressure
Energy-efficient operation under continuous load
Reduced mechanical stress and extended equipment lifespan
This system is designed to perform reliably in high-duty, 24/7 wastewater treatment environments.
Large-Scale Water Flow Generation & Purification Control
During the main purification stage, high-capacity pumps are activated to generate controlled water flow within large treatment basins.Weimiao’s automation system enables:
Coordinated operation of multiple high-power pumps
Adjustable flow intensity for different treatment phases
Automatic process sequencing between treatment tanks
Smooth transfer of treated water to subsequent purification stages
The entire process operates with minimal manual intervention, improving efficiency and operational consistency.
Central Control Room & SCADA Monitoring System
A fully integrated central control room monitoring system was designed and programmed for this project, allowing operators to supervise the entire plant from a single location.
Through customized SCADA / HMI interfaces, operators can:
Monitor real-time process status across all treatment stages
View live data for levels, flow rates, and equipment status
Receive instant alarms with clear fault location indicators
Respond quickly to abnormalities and minimize downtime
All graphical interfaces were custom-designed based on actual site equipment and process logic, ensuring intuitive operation and rapid fault identification.
Project Results & Weimiao Engineering Expertise
This municipal wastewater project demonstrates Weimiao Control Panels’ ability to deliver reliable, scalable, and industry-compliant automation systems for government and infrastructure applications.
The solution provides:
Stable long-term operation for municipal wastewater treatment
Precise control of chemical dosing and water purification
Centralized monitoring for improved operational efficiency
Compliance with environmental and regulatory standards
This project further reinforces Weimiao’s expertise in:
Municipal Water & Wastewater Automation
PLC Control Panel Design & Manufacturing
PLC + VFD Integrated Control Systems
Large-Scale Industrial & Government Infrastructure Projects
