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As global demand for efficient wastewater treatment continues to increase, mechanical dewatering technologies play a critical role in reducing sludge volume and improving operational efficiency. Among these technologies, the GN GNLW554 Dewatering Decanter Centrifuge from GN Solids Control has been widely applied in overseas municipal and industrial wastewater treatment projects.

Overview of GN T Series Dewatering Decanter Centrifuge

The GN dewatering decanter centrifuge belongs to the T Series design, featuring a beach angle of 8.5 degrees, which is optimized for sludge dewatering and thickening applications. This structural design extends the effective dewatering zone inside the bowl, allowing improved solids dryness in final discharge.

The T Series centrifuge is commonly used in municipal and industrial wastewater sludge treatment processes where high throughput and stable operation are required. It is suitable for separating materials with:

• Large particle size or mixed particle distribution
• High density difference between solid and liquid phases
• High solids concentration
• Relatively low viscosity fluids
• Requirements for higher solids dryness rather than maximum clarity

For sludge containing fine particles, flocculants are often added upstream to improve particle aggregation and enhance separation performance.

GNLW554 Model in Wastewater Applications

The GN GNLW554GT decanter centrifuge is one of the most commonly selected models for medium to large-scale wastewater treatment plants. It features:

• Bowl diameter: 550 mm
• High rotational speed up to 3112 RPM
• Maximum G-force up to 3000 G
• Dual motor configuration for stable torque output
• Flexible motor power options depending on application requirements

This configuration allows the GNLW554 to handle a wide range of sludge types, including municipal sewage sludge, industrial wastewater, river sludge, and other environmental treatment materials.

Application Scope in Overseas Projects

In overseas wastewater treatment plants, the GNLW554 is typically applied in:

• Municipal sewage sludge dewatering
• Industrial wastewater treatment systems
• River and lake sediment treatment
• Food processing and chemical wastewater sludge separation
• Oil-containing sludge and emulsion treatment
• Construction and tunnel slurry dewatering

Its adaptability makes it suitable for both continuous operation and variable feed conditions commonly seen in real-world treatment facilities.

Engineering Design Features

The GN T Series design incorporates several structural and mechanical features aimed at improving operational stability and service life:

1. Extended Dewatering Zone

The 8.5° beach angle increases the length of the drying section, allowing improved solids discharge performance.

2. Advanced Material Construction

Key components are manufactured using duplex stainless steel materials such as SUS2205 or SUS2304, offering improved resistance to wear and corrosion compared with conventional stainless steels.

3. Efficient Screw Conveyor Design

The screw conveyor is formed using CNC spiral blade forming technology, improving conveying efficiency and reducing material buildup risks.

4. Adjustable Process Control

The overflow weir design allows adjustment of liquid pool depth, enabling operators to balance between solids dryness and effluent clarity depending on process requirements.

5. Stable Operation System

The centrifuge is equipped with:

• Real-time monitoring of vibration, temperature, and load
• Motor current and torque protection
• Automatic shutdown or blockage handling procedures when required

6. Maintenance-Friendly Design

Large models are designed with assisted opening systems, while bearing disassembly structures reduce maintenance effort and downtime.

Integrated Wastewater Treatment Solutions

Beyond individual equipment supply, GN also provides integrated system solutions covering:

• Sludge transportation systems
• Solid-liquid separation processes
• Dewatering system integration
• Turnkey wastewater treatment packages

This allows clients to implement a more complete and coordinated treatment workflow rather than relying on standalone equipment.

Conclusion

The GN GNLW554 Dewatering Decanter Centrifuge has become a practical solution in overseas wastewater treatment applications due to its stable mechanical design, flexible operating parameters, and adaptability to different sludge types. Its use in municipal and industrial projects reflects a broader trend toward more efficient and mechanically reliable sludge dewatering technologies.

As wastewater treatment requirements continue to evolve globally, equipment such as the GNLW554 plays an important role in supporting consistent and scalable sludge management solutions.

GN Separation recently completed the delivery of a 14-inch sludge dewatering centrifuge package for a customer in Southeast Asia. The package is designed for wastewater sludge treatment and includes a GN T Series dewatering decanter centrifuge along with the necessary auxiliary systems to achieve efficient solid-liquid separation and sludge volume reduction.

GN T Series Dewatering Decanter Centrifuge

The supplied centrifuge is the GNLW364GT, a 14-inch (360 mm bowl diameter) model from GN’s T Series dewatering decanter centrifuge range. The T Series is specifically engineered for sludge thickening and dewatering applications and is widely used in municipal and industrial wastewater treatment projects.

Compared with standard decanter centrifuges, the GN T Series features an 8.5-degree beach angle, which creates a longer dewatering zone inside the bowl. This design allows solids to remain under centrifugal force for a longer period, resulting in drier discharged solids and improved dewatering performance.

The GNLW364GT centrifuge offers:

• Bowl Diameter: 360 mm (14 inch)
• Bowl Length: 1520 mm
• Maximum Speed: 3964 RPM
• Maximum G-Force: 3200 G
• Bowl L/D Ratio: 4.2
• Main Motor: 22/30/37 kW
• Back Drive Motor: 7.5/11 kW
• Beach Angle: 8.5°

Suitable Applications

GN T Series dewatering centrifuges are suitable for a wide range of sludge and wastewater treatment applications, including:

• Municipal wastewater sludge
• Industrial wastewater treatment
• Oily sludge treatment
• Drilling mud treatment
• Sand washing wastewater
• Mineral processing wastewater
• Tunnel and construction slurry
• River and lake dredging sludge
• Kaolin and calcium carbonate processing
• Chemical industry wastewater
• Printing and dyeing wastewater
• Aquaculture wastewater
• Steel-making wastewater

For materials containing fine particles, chemical conditioning is typically required before centrifugation. Flocculants are added to aggregate fine particles into larger flocs, allowing the centrifuge to achieve more efficient separation and improved cake dryness.

Key Features of GN T Series Dewatering Centrifuge

Optimized 8.5° Beach Angle

The extended cone section provides a larger drying area, enabling better moisture removal from solids and achieving higher dryness levels.

High-Quality Duplex Stainless Steel Construction

The bowl and end caps are manufactured from duplex stainless steel such as SUS2205 or SUS2304 using centrifugal casting technology. This construction provides excellent corrosion resistance and superior mechanical strength compared with conventional stainless steel materials.

Efficient Screw Conveyor Design

The screw flights are formed using CNC spiral blade manufacturing equipment to improve solids conveying efficiency. Depending on the material characteristics, GN can also provide variable-pitch screw designs to enhance cake transport and compression.

Wear Protection

Critical wear areas are protected with highly wear-resistant materials, including:

• Tungsten carbide solid discharge port sleeves
• Replaceable wear-resistant alloy protection tiles
• Optional wear-resistant coatings for demanding applications

These features significantly extend equipment service life when handling abrasive materials.

Advanced Dynamic Balancing

All rotating components undergo multiple dynamic balancing procedures, including medium-speed balancing, operating-speed balancing, and complete machine balancing. This ensures smooth operation and reduced vibration during continuous operation.

Compact and Maintenance-Friendly Design

The main and back drive motors are installed on the same end of the centrifuge, reducing installation space requirements and simplifying maintenance access.

The centrifuge is also equipped with hydraulic bearing removal structures, greatly reducing maintenance effort and minimizing the risk of damage during bearing replacement.

Intelligent Monitoring and Protection

GN centrifuges feature comprehensive monitoring systems capable of tracking:

• Bowl speed
• Bearing temperature
• Machine vibration
• Lubrication system pressure
• Main and back motor current
• Conveyor torque

Automatic alarm and protection functions help ensure safe and reliable operation under varying process conditions.

Complete Dewatering Solution

In addition to the decanter centrifuge, GN can provide complete sludge dewatering packages including:

• Automatic dry powder polymer dosing units (PAM)
• Liquid chemical dosing units (PAC)
• Feed pumps
• Polymer preparation systems
• Electrical control systems
• Containerized dewatering solutions

The combination of a GN Chemical Dosing Unit and a GN T Series Dewatering Decanter Centrifuge enables efficient removal of ultrafine particles that cannot be separated by mechanical methods alone.

Supporting Wastewater Treatment Projects Across Southeast Asia

As industries and municipalities throughout Southeast Asia continue to strengthen environmental protection requirements, the demand for reliable sludge dewatering equipment continues to grow. GN Separation provides customized dewatering solutions tailored to different sludge characteristics and treatment capacities.

The successful delivery of this 14-inch sludge dewatering centrifuge package further demonstrates GN’s capability in providing dependable solid-liquid separation equipment for wastewater treatment, industrial sludge management, and environmental protection projects worldwide.

GN Separation looks forward to supporting more customers in Southeast Asia and other regions with high-performance dewatering centrifuge systems and complete wastewater treatment solutions.

As environmental regulations continue to tighten worldwide, paper mills are facing increasing pressure to improve wastewater treatment efficiency, reduce sludge disposal costs, and achieve more sustainable operations. Wastewater generated during paper production often contains suspended solids, fibers, fillers, coating materials, inks, and organic contaminants, making sludge treatment a critical part of the overall process.

To meet these challenges, GN Separation provides the GNLW554-VFD T Series Dewatering Decanter Centrifuge, a reliable and high-capacity solution designed for industrial sludge dewatering applications, including overseas paper mill wastewater treatment projects.

Why Paper Mills Need Efficient Sludge Dewatering

Paper manufacturing consumes significant amounts of water during pulping, washing, bleaching, coating, and recycling processes. As a result, wastewater treatment systems in paper mills generate large volumes of sludge with high moisture content.

Without effective dewatering equipment, paper mills may encounter:

• High sludge transportation and disposal costs
• Difficulties in wastewater recycling
• Increased environmental compliance pressure
• Excessive energy consumption
• Unstable downstream treatment performance

A properly selected decanter centrifuge can significantly reduce sludge volume, improve solid dryness, and lower operating costs.

GN GNLW554-VFD T Series Decanter Centrifuge

The GNLW554-VFD belongs to GN’s T Series dewatering decanter centrifuge range. It is specially designed for sludge thickening and dewatering applications requiring high throughput and reliable continuous operation.

The T Series adopts an optimized 8.5-degree beach angle, which extends the drying zone inside the bowl and improves solids dewatering performance. This design enables the centrifuge to discharge drier solids while maintaining stable liquid clarity.

Main Technical Specifications

The large bowl diameter and long bowl design provide strong processing capacity, making the centrifuge suitable for medium and large paper mill wastewater treatment systems.

Advantages for Paper Mill Wastewater Treatment

Excellent Sludge Dewatering Performance

Paper mill sludge often contains fine fibers and lightweight suspended solids. GN’s T Series decanter centrifuge is designed with a long dewatering zone and optimized screw conveyor structure, allowing efficient separation after polymer dosing.

The result is:

• Reduced sludge moisture content
• Lower sludge disposal volume
• Improved downstream handling efficiency

Stable Continuous Operation

Paper mills typically operate continuously for long production cycles. The GNLW554-VFD is designed for stable 24/7 industrial operation with:

• Premium SKF bearings
• Real-time vibration monitoring
• Bearing temperature monitoring
• Automatic protection systems
• High-speed dynamic balancing

These features help reduce downtime and improve operational reliability.

Corrosion-Resistant Construction

Wastewater in paper mills may contain chemicals, alkalis, chlorides, and abrasive particles. GN uses duplex stainless steel materials such as SUS2205 or SUS2304 for critical rotating components, providing excellent corrosion resistance and long service life.

Compared with conventional welded structures, GN’s centrifugal casting and forging manufacturing process offers:

• Better structural integrity
• Reduced residual stress
• Improved resistance to intergranular corrosion

Energy-Efficient Design

The deep liquid pool and optimized bowl structure reduce energy loss during operation. Combined with VFD control, operators can adjust differential speed and bowl speed according to changing sludge conditions, helping reduce power consumption while maintaining separation performance.

Wear Protection for Long Service Life

Industrial sludge applications can cause severe wear on centrifuge internal components. GN equips the centrifuge with:

• Tungsten carbide discharge sleeves
• Replaceable wear-resistant alloy protection plates
• Durable screw conveyor protection

These designs greatly improve equipment longevity and reduce maintenance costs.

Intelligent Control System

The GNLW554-VFD usually adopts a stainless steel electrical control panel integrated with:

• VFD
• PLC
• HMI touchscreen
• Alarm and monitoring system

Key operating parameters are monitored in real time, including:

• Bowl speed
• Differential speed
• Bearing temperature
• Vibration
• Motor current
• Torque
• Lubrication status

If abnormal conditions occur, the system can automatically trigger alarms or protection procedures to ensure operational safety.

Suitable Applications Beyond Paper Mills

Although widely used in paper mill wastewater treatment, the GN T Series decanter centrifuge is also suitable for many industrial and environmental applications, including:

• Municipal sludge dewatering
• Sand washing wastewater
• Mining wastewater
• Oily sludge treatment
• Chemical wastewater
• Printing and dyeing wastewater
• River and lake sludge treatment
• Kaolin and calcium carbonate processing

Complete Turnkey Dewatering Solutions

In addition to decanter centrifuges, GN Separation can also provide complete sludge dewatering systems, including:

• Polymer dosing units
• Sludge feeding pumps
• Screw conveyors
• Vibrating screens
• Control systems
• Skid-mounted integrated solutions

GN’s extensive manufacturing capability allows customers to obtain complete turnkey solutions from a single supplier.

Conclusion

For overseas paper mills seeking reliable and efficient sludge dewatering equipment, the GN GNLW554-VFD T Series Dewatering Decanter Centrifuge offers a practical and high-performance solution.

With its large bowl design, optimized beach angle, intelligent control system, and durable wear-resistant construction, the centrifuge helps paper mills:

• Reduce sludge disposal costs
• Improve wastewater treatment efficiency
• Enhance operational stability
• Meet increasingly strict environmental requirements

GN Separation continues to support global industrial customers with dependable separation equipment and customized wastewater treatment solutions. GN Separation looks forward to working with you.

In geological and mineral exploration, diamond/core drilling is widely used due to its accuracy in obtaining subsurface samples. During drilling, clean water or bentonite-based drilling fluid is typically applied to cool the drill bit and carry cuttings to the surface.

However, with increasingly strict environmental regulations, the traditional method of mud pit settling is no longer sufficient. It leads to land contamination, inefficient solids removal, and significant fluid loss.

To address these challenges, GN has developed a closed-loop geological drilling mud treatment system, designed to minimize environmental impact while improving drilling efficiency.

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Closed-Loop Mud Treatment System – Overview

GN’s system is engineered specifically for geological coring drilling mud, enabling efficient solid-liquid separation and reuse of drilling fluid.

Main Components

The system typically includes:

• Small shale shaker
• High-speed decanter centrifuge
• Mud supply pump
• Jet mixing hopper
• Mud tank

👉 This integrated design allows:

• Continuous removal of drilled solids
• Recycling of drilling fluid
• On-site preparation and mixing of new mud

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System Models

GN offers two standard configurations:

• Standard Type: GNSR-130L
• Modular Type: GNSR-130M

Both are designed for mobility, compact footprint, and rapid deployment in exploration sites.

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Core Equipment – Mini Decanter Centrifuge

At the heart of the system is the 220mm bowl mini decanter centrifuge, optimized for fine solids separation in low-flow drilling operations.

Available Models

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Key Advantages of GN Solution

1. Environmental Compliance

The closed-loop system eliminates the need for open mud pits, reducing:

• Soil contamination
• Waste discharge
• Environmental footprint

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2. Efficient Solid-Liquid Separation

With high-speed centrifuges generating up to 3000 G-force, the system can:

• Remove fine solids effectively
• Improve drilling fluid quality
• Extend fluid reuse cycles

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3. Flexible Drive Options

GN provides three drive configurations to suit different project needs:

• Fixed Speed (GNLW223D): Simple and cost-effective
• Hydraulic Drive (GNLW223D-FHD): Ideal for harsh environments and variable loads
• VFD Drive (GNLW224G-VFD): Precise control and energy efficiency

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4. Compact & Modular Design

• Small footprint for remote exploration sites
• Skid-mounted or modular options
• Easy transportation and quick installation

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5. Integrated Mud Mixing Capability

The system includes:

• Mud mixing pump
• Jet hopper

👉 Allowing operators to:

• Prepare new drilling fluid
• Adjust mud properties in real time

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Application Scenarios

This system is ideal for:

• Mineral exploration drilling
• Geological coring projects
• Remote or environmentally sensitive areas
• Projects requiring fluid recycling and minimal waste discharge

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Conclusion

With stricter environmental regulations and increasing demand for efficient drilling operations, traditional mud treatment methods are no longer viable.

GN Solids Control provides a compact, efficient, and environmentally responsible solution through its geological drilling mud treatment system. By integrating high-speed centrifuges and modular design, GN helps clients achieve:

• Reduced environmental impact
• Improved drilling efficiency
• Lower operational costs

GN Separation recently completed the manufacturing and shipment of a sludge dewatering centrifuge package to an overseas environmental protection company. This project demonstrates GN’s capability to deliver reliable and efficient sludge treatment solutions for international wastewater treatment applications.

The package is designed to support the client’s requirements for municipal and industrial sludge dewatering, ensuring stable performance, reduced sludge volume, and compliance with environmental standards.

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Overview of GN Dewatering Decanter Centrifuge (T Series)

The core equipment in this project is the GN Dewatering Decanter Centrifuge (T Series).

GN dewatering decanter centrifuge is a T series decanter centrifuge with a beach angle of 8.5 degrees, specifically designed for sludge dewatering and thickening applications.

Thanks to its optimized structural design, the T series centrifuge is widely used in:

• Municipal wastewater treatment

• Industrial wastewater treatment

• Environmental protection projects

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Working Principle and Application

The GN T series decanter centrifuge is ideal for materials with:

• Large particle size

• High density difference between solid and liquid

• Low viscosity

• High concentration

For sludge containing fine particles, flocculants are typically added to aggregate fine solids into larger particles before entering the centrifuge. This significantly improves separation efficiency and dewatering performance.

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Typical Applications

GN dewatering decanter centrifuge is suitable for a wide range of industries and materials, including:

• Municipal sewage and river sludge

• Food and organic wastewater

• Oily sludge and oil sand separation

• Drilling mud and construction slurry

• Mining and mineral processing wastewater

• Chemical and pharmaceutical wastewater

• Printing and dyeing wastewater

• Aquaculture wastewater

It is also widely used for solid-liquid separation of materials such as:

• Calcium carbonate, bentonite, silica

• Titanium dioxide, barium sulfate

• Kaolin, aluminum hydroxide

• Various industrial slurries and fine particles

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Key Technical Features

1. Optimized 8.5° Beach Angle

The 8.5-degree beach angle extends the dewatering zone, allowing:

• Longer drying time

• Higher solid dryness

• Improved dewatering efficiency

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2. High-Quality Materials and Manufacturing

• Bowl and shaft caps made of duplex stainless steel (SUS2205 / SUS2304)

• Manufactured by centrifugal casting and forging, ensuring:

  • Higher strength

  • Better corrosion resistance

  • Longer service life

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3. Advanced Screw Design

• CNC-formed screw blades for improved conveying efficiency

• Optional variable pitch design for enhanced compression

• Replaceable wear-resistant alloy protection plates

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4. Energy-Efficient and Stable Operation

• Deep liquid pool design reduces energy loss

• Optimized flow structure minimizes turbulence

• Three-stage dynamic balancing ensures smooth high-speed operation

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5. Wear Protection and Durability

• Tungsten carbide sleeves at solid discharge ports

• Anti-abrasion design for extended equipment lifespan

• Suitable for abrasive and high-solid-content materials

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6. Intelligent Control System

• Equipped with PLC, HMI, and VFD

• Real-time monitoring of:

  • Speed

  • Temperature

  • Vibration

  • Torque

  • Motor current

• Automatic protection for:

  • Overload

  • Blockage

  • Abnormal operation

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7. Flexible and User-Friendly Design

• Adjustable weir plates for liquid pool depth control

• Easy maintenance with hydraulic bearing disassembly

• Compact structure with dual motors on one end

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Model Range and Capacity

GN T Series decanter centrifuge is available in multiple models, including:

• GNLW224GT

• GNLW364GT

• GNLW454GT

• GNLW554GT

• GNLW654GT

• GNLW764GT

With:

• Bowl diameters from 220 mm to 760 mm

• Maximum G-force up to 3200 G

• Processing capacity tailored to different sludge conditions

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Project Value for Overseas Clients

For overseas environmental companies, GN centrifuge packages offer:

• Reliable and continuous sludge dewatering

• Reduced sludge disposal costs

• Compliance with environmental regulations

• Easy integration into existing treatment systems

• Lower operation and maintenance cost

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Conclusion

The successful shipment of this sludge dewatering centrifuge package highlights GN Separation’s strong capability in delivering high-performance and customized sludge treatment solutions to global clients.

The GN T Series dewatering decanter centrifuge, with its optimized 8.5° beach angle, robust construction, and intelligent control system, is an ideal choice for demanding sludge dewatering applications.