GN Nodig Mud Recycling System

At GN Separation, we continuously strive to provide high-quality, tailor-made solutions to meet the diverse needs of our global customers. Recently, we successfully delivered a batch of sewage treatment decanter centrifuges to a valued European client, further strengthening our footprint in the European wastewater treatment market.

Customized Design for Optimal Performance

Understanding the unique demands of sewage treatment applications, we customized the exterior structure of these centrifuges to ensure seamless integration with the customer’s existing system. Our flexible design approach allows clients to specify dimensions, materials, and configurations that best suit their operational environment.

Key Advantages of GN Separation’s Decanter Centrifuges

• High Efficiency: Advanced screw conveyor design maximizes solids capture and dewatering performance.

• Durability: Manufactured with high-grade materials and precision engineering to withstand corrosive and abrasive sludge.

• Energy Saving: Optimized motor and bowl design reduce power consumption without compromising separation quality.

• Easy Maintenance: Modular components and convenient access points simplify routine maintenance and reduce downtime.

• Automation: Equipped with PLC control systems allowing real-time monitoring and automatic adjustment for optimal operation.

Premium Components for Reliable Operation

To guarantee long-term reliability and efficiency, the centrifuges are equipped with internationally renowned motor brand WEG. Known for its robust performance and energy efficiency, WEG motors help enhance the overall operational stability of the centrifuges. Additionally, all units come with CE certification, meeting rigorous European safety and quality standards.

Applications and Benefits

These decanter centrifuges are ideal for the separation of solid-liquid mixtures commonly found in sewage treatment plants. They efficiently reduce sludge volume, improve water clarity, and contribute to environmental protection by enabling better handling and disposal of wastewater solids.

Commitment to Quality and Customer Satisfaction

At GN Separation, every product is built with a commitment to quality, innovation, and customer-centric customization. We are proud to support our European customers with equipment that meets their stringent requirements and promotes sustainable wastewater management.

When it comes to clarifying liquids with low solid content or separating fine particles, tubular centrifuges offer a practical and reliable solution. At GN Separation, the high-speed tubular centrifuge is designed to provide consistent performance for applications in a range of industries, including food and beverage, chemical processing, and biotechnology.

Key Operating Principles

GN’s high-speed tubular centrifuge is a vertical type separation unit that operates at speeds up to 15,000 RPM, generating a centrifugal force of up to 16,000×g. The tubular bowl, which rotates at high speed, creates a strong centrifugal field that pushes solid particles outward to the inner wall of the bowl, while the clarified liquid flows through the center and exits from the top.

Because the solids remain attached to the inner wall of the bowl, the machine requires a shutdown and manual cleaning after each operation cycle. Despite this, the unit offers a straightforward mechanical structure and user-friendly maintenance routine, making it well-suited for batch operations with relatively low solid content (typically below 1%).

Practical Applications

The GN tubular centrifuge is commonly used in:

• Plant and herbal extraction processes, for clarifying mixtures such as plant oils, pigment suspensions, and natural extracts.

• Biotechnology and pharmaceutical production, where it helps separate microbial cells, yeast, proteins, or other biological solids from fermentation broth or nutrient liquids.

• Food and beverage industry, for purifying beverages or separating impurities from essential oils and flavor concentrates.

• Fine chemical processing, where precise clarification is required.

Features and Design

The machine is made from corrosion-resistant materials such as stainless steel to ensure cleanliness and durability. Safety mechanisms including vibration protection and overload protection are incorporated to maintain stable operation. The compact vertical design allows for space-efficient installation, while the solid-liquid separation is performed without the need for complex filters or additional consumables.

Summary

GN Separation’s high-speed tubular centrifuge offers a dependable choice for users who need efficient clarification of liquids with minimal solid content. It is particularly useful where precision and clarity are important, such as in the biotechnology, chemical, and food sectors. While manual cleaning is required after each use, the centrifuge compensates with its consistent performance and simple operation.

For those seeking a separation solution for fine particles and clear liquids, GN Separation welcomes the opportunity to support your processing needs.

GN Separation is pleased to announce the successful shipment of two complete GNOST-15 oily sludge treatment systems to a valued client in Asia. These systems are designed for the efficient separation and recovery of oil, water, and solids from a variety of oily sludge sources such as refinery waste, tank bottom sludge, and drilling waste.

Integrated Modular Design for High-Volume Sludge Treatment

Each GNOST-15 system is designed to handle up to 15 cubic meters of oily sludge per hour, featuring a comprehensive, hot-wash separation process. The systems are fully skid-mounted, modular, and ready for plug-and-play operation on site. Each set includes the following modules:

1. Feeding Pump Module

Responsible for transferring the oily sludge from the collection site into the treatment process using a vacuum or progressive cavity pump, ensuring continuous and safe delivery.

2. Premixing Tank Module

A heated and agitated tank used to precondition the sludge with water and chemicals. This step helps reduce viscosity and loosens the oil from solids.

3. Coarse Screening Module (Vibrating Screen)

High G-force vibrating screens remove large debris and coarse particles, protecting downstream equipment and improving overall system efficiency.

4. GNLW-554 Two-Phase Decanter Centrifuge Module

Performs solid-liquid separation. The high-speed decanter centrifuge separates the de-oiled solids from the liquid phase, significantly reducing the oil content in the discharged solids.

5. GNLWS-554 Three-Phase Decanter Centrifuge Module

Further separates the remaining liquid into three phases: recoverable oil, clean water, and fine solids, completing the final polishing step of the process.

6. Chemical Dosing Unit

Automatically delivers flocculants, demulsifiers, and pH conditioners to enhance separation efficiency and emulsion breaking.

7. Steam Generator Module

Provides the necessary heat for the entire hot-wash process, helping to reduce viscosity and improve oil recovery rates.

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Proven Performance in the Field

GNOST-15 is part of GN’s scalable oily sludge treatment family, ranging from 1 m³/h to 15 m³/h. The shipment of two complete units demonstrates growing global trust in GN’s technology for sustainable sludge handling and oil recovery.

With its modular layout and proven mechanical-chemical synergy, this system not only maximizes oil recovery, but also minimizes waste, making it an ideal solution for clients seeking compliance, efficiency, and environmental responsibility.

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GN Separation is committed to delivering reliable, high-performance separation equipment for global industries. We look forward to supporting more clients in Asia and around the world with tailored sludge treatment solutions.

Interested in a customized oily sludge system? Contact us for technical consultation and project support.

Managing oily sludge has long been a challenge for refineries, drilling sites, and industrial plants due to its complex composition and environmental risks. GN Separation offers a comprehensive Oily Sludge Treatment System designed to address these challenges with efficiency, environmental compliance, and resource recovery in mind.

A Complete Process for Oily Sludge Hot Washing

The GN Oily Sludge Treatment System is engineered to perform the entire oily sludge hot washing process. From sludge extraction to three-phase separation, the system integrates multiple technologies to ensure thorough treatment and maximum recovery. The core steps include:

1. Sludge Extraction
   The process starts with the extraction of oily sludge from pits or tanks using GN’s solid vacuum pump or mechanical excavators.

2. Heating & Conditioning
   The extracted sludge is transferred to a heating and pre-mixing tank, where it is stirred and conditioned. This step facilitates the breakdown of sludge structure, enhancing the effectiveness of the chemical treatment.

3. Coarse Particle Screening
   A high G-force vibrating screen is used to remove large solid particles from the conditioned sludge, preparing it for finer separation stages.

4. Secondary Heating with Chemicals
   The remaining fine sludge undergoes further heating and is treated with chemical agents. This helps to strip oil from solid particles, transferring it into the liquid phase for easier separation.

5. Two-Phase Solid-Liquid Separation
   Using GN’s decanter centrifuge, the sludge is separated into solid and liquid phases. The solids, with an oil content reduced to below 2%, can be further treated by biodegradation, pyrolysis, or incineration.

6. Three-Phase Separation
   The liquid phase is sent to a three-phase disc stack separator, which separates it into recoverable oil, reusable water, and residual solids. This step ensures maximum resource recovery and minimizes waste.

Flexible Models to Meet Diverse Needs

GN offers three standard models of the oily sludge treatment system:

Each system can be customized based on the sludge characteristics and operational needs of the client. GN engineers will analyze sample material and offer tailored configurations to ensure optimal performance.

Core Equipment in the System

GN’s oily sludge treatment solution is built around several high-performance machines, including:

• Solid Vacuum Pump – Efficiently extracts and transfers sludge over long distances.

• High G Vibrating Screen – Separates coarse solids from heated sludge.

• Decanter Centrifuge – Performs high-speed solid-liquid separation with minimal residual oil.

• Three-Phase Disc Separator – Extracts oil, water, and solids with high precision and G-force.

Applications Across Industries

GN’s oily sludge treatment system is widely applied in:

• Oil refineries (e.g., tank bottom sludge)

• Drilling operations (drilling waste treatment)

• Oil tank cleaning

• Industrial oily wastewater treatment

Whether handling refinery waste or tank cleaning sludge, GN’s system delivers reliable results with a focus on environmental safety, operational efficiency, and oil recovery.

Resource Recovery & Environmental Benefits

After treatment:

• Oil is recovered and can be reused or sold.

• Water is recycled for hot washing or cleaning.

• Solid residue has significantly reduced oil content, making it suitable for environmentally safe disposal or further treatment.

GN Separation is proud to announce the successful delivery of five GNLW364-FHD Full Hydraulic Drive Decanter Centrifuges to an overseas starch processing facility. These machines are designed to handle high-viscosity, high-concentration materials such as starch slurry, while also meeting stringent food-grade requirements.

Food-Grade Design for Starch Separation

The GNLW364-FHD model features a polished interior bowl and screw, ensuring hygienic operation and full compliance with food processing standards. This makes it an ideal choice for applications involving sensitive materials like starch, where sanitation and performance are equally critical.

Equipped with Swiss-Made Viscotherm Hydraulic System

Each unit is powered by the Swiss Viscotherm hydraulic drive system, one of the world’s leading technologies in decanter centrifuge control. The system includes:

• Hydraulic differential

• Hydraulic system

• Air cooling system

The hydraulic drive system enables independent and infinitely variable control of both the bowl speed and the differential speed during operation, offering unmatched flexibility and efficiency. It is especially well-suited for high-temperature, heavy-duty environments.

GNLW364-FHD Highlights

• Model: GNLW364-FHD

• Bowl Material: Duplex SS2304/SS2205 (centrifugal casting)

• Screw Material: SS304/SS316

• Screw Protection: Tungsten Carbide Tiles

• Solids Discharge Protection: Tungsten Carbide Inserts

• Bearings: SKF

• Drive System: Full Hydraulic, Viscotherm (Switzerland)

• Electrical Control: PLC Smart Control

• Coating: Cosco & Kansai Zinc Rich Epoxy

• Max Capacity: 45 m³/h (200 GPM)

• Max Bowl Speed: 3400 RPM (2328 G)

• Max Torque: 4163 N·m

• Machine Dimensions: 3000 × 2400 × 1860 mm

• Weight: 3400 kg

Specifications above are for reference only and subject to project-specific configurations.

Commitment to International Quality Standards

At GN Separation, we work closely with world-renowned component suppliers like Viscotherm to ensure our centrifuges meet the highest global standards in both performance and reliability. This project is a reflection of our growing presence in the international food processing sector and our dedication to delivering tailored separation solutions.

If you’re looking for a dependable partner for high-performance centrifuge systems, GN Separation is ready to support your process needs.