Using PLC and Inverter to Reduce Energy Consumption in Wastewater Treatment Pump Systems

PLC (Programmable Logic Controller) and Inverter (VFD) are integrated technologies that provide a concrete answer to increasing efficiency and saving energy. In an era where energy costs and environmental preservation are at the heart of the industrial sector, managing energy in wastewater treatment pump systems is something entrepreneurs should not overlook. Typically, running water pumps at a constant speed (Fixed Speed) leads to unnecessary electricity consumption and causes equipment to wear out faster than scheduled.

Engineering Mechanisms for Energy Saving

Combining these two technologies creates a flexible and intelligent control system as follows:

• Motor Speed Control: The Inverter adjusts electrical frequency to control the pump motor's speed to match the actual volume of wastewater at any given moment.
• Intelligent Processing with PLC: The PLC acts as the central brain, receiving signals from various sensors, such as Level Sensors to monitor water levels or Flow Meters to measure flow rates, then calculating and commanding the Inverter to adjust operation levels automatically.
• Soft Start & Stop: This helps reduce the inrush current during motor startup, which not only extends the machine's lifespan but also effectively reduces electricity costs during peak periods (Demand Charge).

Superior Benefits for Wastewater Treatment Systems

Significant Energy Cost Reduction: Adjusting pump speed based on the actual load can reduce electricity bills by up to 30-50%.

• Treatment Precision: The PLC can receive water quality parameter data from a pH Controller or DO Sensor to adjust water circulation rates appropriately for chemical and biological processes at each interval.
• Data Management via IoT: The system can connect to the E-power IoT Platform, allowing administrators to monitor operating status, energy consumption, and water levels in real-time via smartphone or computer.

Recommended Products and Technology from E-Power Service

To ensure your automation system functions perfectly, E-Power Service recommends high-quality products that support this design:

1. Control and Processing Systems (PLC):

• PLC supporting CODESYS: We specialize in sourcing and programming PLCs using the CODESYS platform, an international standard that ensures high precision and flexibility in controlling Inverters and processing sensor data.

2. Water Quality and Level Sensors (Industrial Sensors):

• Level Sensors: High-quality water level sensors for sending signals to the PLC to control pump cycles.
• pH Controller & Sensors: A set for measuring acidity-alkalinity to serve as conditions for detailed wastewater treatment control.
• Ultrasonic Anemometer & Weather Sensors: For outdoor wastewater systems requiring weather data to support automation decisions.

3. Smart Monitoring Systems (IoT Solutions):

E-power IoT Platform: A platform for tracking pump operation status and electrical energy usage, helping you manage the factory from anywhere at any time.

Elevate Your Engineering with Experts

E-Power Service is ready to deliver turnkey solutions, from consultation and system design to sourcing international standard equipment, installation, and programming by experienced engineers. Transform your wastewater treatment into a Smart Wastewater System that is environmentally friendly and sustainably cost-effective.


Contact us for energy-saving solutions: LINE Official: @epower