VFD Industry Solutions

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Water Treatment & Water Supply VFD Energy-Saving Solutions

Views: 12 Author: Site Editor Publish Time: 2026-07-17 Origin: Site

From Municipal Sewage to Building Water Supply, AnyHz VFDs Deliver 30%-55% Energy Savings for Water Treatment Industry

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Section 1: Industry Pain Points (4-Column Icon Cards)

⚡

High Energy Consumption

Water pumps and fans operate continuously at power frequency with prevalent "overcapacity operation", causing over 40% of electric energy waste.

Unstable Pipe Network Pressure

Large water demand difference between peak and off-peak hours. Traditional valve regulation leads to severe pressure fluctuation and pipe burst risks.

Severe Equipment Wear

Frequent start-stop operations generate strong current impact, accelerating mechanical wear of motors and water pumps, and increasing annual maintenance costs.

Low Automation Level

Reliance on manual inspection and manual adjustment results in delayed response, unable to realize precise control and remote intelligent management.

Section 2: AnyHz Custom Solutions (Left-Right Alternating Layout)

Solution A: Municipal Sewage Treatment System

Core Control Strategy

Equipment Type	Control Mode	Energy-Saving Principle
Aeration Blower	DO Closed-Loop Control	Real-time speed adjustment based on online dissolved oxygen monitoring data to precisely control aeration volume and eliminate excessive aeration energy waste.
Lift Pump Group	Liquid Level-Speed Linkage Control	Automatic speed regulation according to water collection tank liquid level to realize on-demand water supply and eliminate valve throttling loss.
Reflux Pump / Sludge Pump	Flow Proportional Control	Automatically adjust reflux ratio according to process requirements to optimize biochemical treatment efficiency and reduce invalid operation.
Multi-Pump Operation	Intelligent Scheduling Algorithm	Support automatic multi-pump rotation and fault mutual switching to balance single pump operation time and extend overall equipment service life.

Technical Highlights

Vector Control Technology: FST-650L adopts high-performance vector algorithm with high low-speed torque output, ensuring stable operation of water pumps in low-frequency range.
High Protection Design: Grade with three-proof paint coating, adapting to humid and corrosive gas environments in sewage plants.
Communication Compatibility: Standard RS485 interface and Modbus RTU protocol, seamlessly connecting with PLC, DCS and upper monitoring systems.
Optional Energy Feedback: Equipped with braking unit to realize energy feedback during rapid braking, further reducing comprehensive energy consumption.

Solution B: Building Constant Pressure Water Supply System

System Architecture

[Municipal Pipe Network] → [Reservoir] → [Variable Frequency Pump Group] → [Pressure Sensor] → [User Pipe Network] ↑ ↑ ↓ [Liquid Level Monitoring] [AnyHz FST-500 VFD] ← [PID Constant Pressure Controller] ↓ [HMI Touch Screen Monitoring]

Building Constant Pressure Water Supply System

Core Functions

Function	Description
PID Constant Pressure Control	Real-time feedback via pressure sensors, VFD automatically adjusts pump speed, controlling pipe network pressure fluctuation within ±0.02MPa for stable water supply.
Sleep & Wake-up Function	Automatically enter sleep mode during low water consumption at night, and wake up within 0.5s in peak periods to balance energy saving and response speed.
Multi-Pump Joint Regulation	Support 1-main-2-standby, 1-main-3-standby, timing rotation and other modes, realizing automatic pump group switching and fault redundancy.
Water Shortage Protection	Intelligently monitor water source status to prevent pump idling and equipment damage caused by water shortage.
Fault Auto-Recovery	Automatically switch from main pump to standby pump in case of failure to ensure uninterrupted water supply.

Section 3: Recommended Products (Grid Product Cards)

Product Card 1: FST-500 Special VFD for Constant Pressure Water Supply

Product Image	[FST-500 Front View Product Image]
Power Range	0.75kW - 7.5kW
Application Scenarios	Small and medium-sized building water supply, rural drinking water projects, small sewage treatment stations
Core Features	1. Built-in dedicated constant pressure water supply PID parameters for one-click debugging2. Support 1-main-3-standby multi-pump control3. Automatic sleep and wake-up function4. Multiple protection functions including water shortage, overvoltage and undervoltage
Certifications	CE / ISO9001
Learn More	[https://www.anyhz.com/product/fst-500.html]

Product Card 2: FST-650L High-Performance Vector VFD

Product Image	[FST-650L Front View Product Image]
Power Range	0.75kW - 630kW
Application Scenarios	Large and medium-sized sewage treatment plants, municipal pump stations, industrial circulating water systems
Core Features	1. High-performance vector control, 150% rated torque output at 0.5Hz 2.Four-quadrant operation support with optional energy feedback module 3. Rich communication interfaces: RS485
Certifications	CE / ISO9001 / Optional Explosion-Proof Certification
Learn More	[https://www.anyhz.com/product/fst-650l.html]

Product Card 3: HMI Industrial Touch Screen

Product Image	[HMI Touch Screen Image with Water Supply Monitoring Interface Displayed]
Size Specifications	4.3-inch / 7-inch / 10.1-inch/15.6-inch
Application Scenarios	Centralized monitoring of pump stations, building water supply management, sewage plant central control room
Core Features	1. ARM Cortex-A7 dual-core 1GHz processor for high-speed operation2. Seamless communication and matching with AnyHz VFDs3. Real-time display of pressure, flow, liquid level and energy consumption data4. Support historical data recording and report export
Learn More	[https://www.anyhz.com/products-category/hmi-display-screen.html]

Section 4: Application Case

Municipal Sewage Treatment Plant Energy-Saving Renovation

Tags: Municipal Sewage | Aeration System | Lift Pump Group | 42% Energy Saving

Project Overview

Project Location	Prefecture-level city in East China
Treatment Capacity	50,000 tons per day
Pre-Renovation Energy Consumption	Annual power consumption: 2.8 million kWh
Renovated Equipment	4 sets of 75kW aeration blowers + 6 sets of 37kW lift pumps

Solution Deployment

Aeration Blower System: Adopt 4 sets of FST-650L-075G/090P VFDs, matched with DO online monitors to realize full closed-loop dissolved oxygen control
Lift Pump Group: Adopt 6 sets of FST-650L-037G/045P VFDs, realizing automatic speed regulation based on water collection tank liquid level changes
Monitoring System: Equipped with 1 set of 7-inch HMI touch screen for centralized monitoring of all equipment operating status and data

Renovation Effects

Indicator	Before Renovation	After Renovation	Optimization
Annual Power Consumption	2.8 million kWh	1.62 million kWh	Down 42%
Annual Electricity Cost	USD 27,400	USD 15,800	Save USD 11,600/year
Dissolved Oxygen Control Accuracy	±1.5mg/L	±0.3mg/L	5 times improvement
Equipment Noise	85dB	77dB	Down 8dB
Maintenance Cycle	3 months	6 months	2 times extension
Payback Period	-	-	14 months

Customer Testimonial

"The renovation has greatly reduced our electricity bills and stabilized the aeration effect, significantly improving the effluent water quality. AnyHz VFDs operate reliably in humid and corrosive environments with zero faults for more than one year."
— Equipment Section Supervisor of the Sewage Treatment Plant

View More Cases →

Section 5: Technical Parameter Comparison Table

Parameter	FST-500	FST-650L
Power Range	0.75kW - 7.5kW	0.75kW - 630kW
Control Mode	V/F Control	Open Loop Vector Control
Speed Regulation Range	1:100	1:100
Starting Torque	150% @ 0.5Hz	150% @ 0.5Hz
Protection Grade	IP20	IP20
Communication Interface	RS485	RS485
Multi-Pump Control	1 Main + 3 Standby	Expandable to 1 Main + 7 Standby
Energy Feedback	Not Supported	Optional Configuration
Applicable Environment	Indoor Dry Environment	Humid & Corrosive Environment

Section 6: Bottom CTA Area

Title: Customize Energy-Saving VFD Solutions for Your Water Treatment Projects

Description: Our engineering team has over 15 years of professional experience in the water treatment industry, providing one-stop full-cycle services including solution design, equipment selection, on-site commissioning and after-sales operation & maintenance.

Free Consultation