A New Test Workshop for Smarter Material Separation Decisions

When choosing separation equipment, real-world performance matters more than datasheets. To support evidence-based selection, our new material separation test workshop is now completed and ready for customer trials. The facility brings together five dedicated test modules designed to mirror the operational challenges found in mining, drilling fluids management, and slurry handling. Whether you send representative samples to our lab or prefer on-site trials at your location, the goal is the same: confirm process outcomes, quantify performance, and de-risk your investment before scaling up.

What’s inside the workshop

  1. Mining Vibrating Screen Test Module
    This station evaluates screening behavior for ores, tailings, and mineral slurries. We can vary feed density, particle size distribution, and screen aperture to map cut points and throughput. Results typically include mass balance, screen efficiency, moisture of oversize/undersize, and blinding tendency under different conditions.
  2. Drilling Shale Shaker Test Module
    For drilling fluids, the shaker test module helps assess solids removal efficiency across API screen sizes, fluid rheology changes, and deck motion parameters. We record fluid loss, screen life indications, and the effect on downstream centrifugation requirements—useful for optimizing screen selection and solids control strategy.
  3. Decanter Centrifuge Test Module
    Here we quantify separation under controlled G-force, differential speed, and feed rate. We measure centrate clarity, cake dryness, torque trends, and polymer (if any) consumption. The outcome is a performance envelope that links solids loading to achievable cut size and energy use.
  4. Combined Separation Module (Shaker + Centrifuge)
    Many processes benefit from staged separation. This module allows us to test upstream screening followed by centrifugation, validating how primary cut removal improves centrifuge efficiency, reduces wear, and lowers power and chemical demand. We document the combined mass balance and incremental gains.
  5. Solids Vacuum Pump Test Module
    For viscous, abrasive, or high-solids slurries, pneumatic vacuum pumps can be decisive. This station profiles suction lift, transfer distance, and cycle frequency versus material properties, helping determine the practical limits for remote or confined transfer tasks. 

How the trials work

Customers may ship samples (with MSDS and handling instructions) for controlled laboratory testing, or request field trials at their sites when scale or logistics make in-house testing impractical. Before any test, we align on objectives: target cut size, clarity, moisture, throughput, footprint, and power constraints. We then design the matrix—screen sizes, rotational speeds, feed densities—and run iterative trials to reach a robust operating window.

Deliverables you can act on

We provide a concise report with:

  • Feed characterization: PSD curves, solids content, rheology notes.
  • Operating setpoints and corresponding KPIs (yield, clarity, cake dryness, energy, wear indications).
  • Recommended equipment configuration and scale-up guidance.
  • Observations on maintenance, safety, and consumables.

This workshop is not about selling a model—it is about reducing uncertainty. With transparent data and repeatable methods, you can select equipment with confidence and document the basis for your decision.

If you would like to schedule a sample-based test or an on-site trial, let us know your objectives and constraints. We’ll propose a test plan that focuses on measurable outcomes and practical recommendations.

 

GN Separation at Pollutec Lyon 2025: what to expect and why it matters

From October 7–10, 2025, GN Separation will exhibit at Pollutec Lyon 2025, Eurexpo Lyon (Avenue Louis Blériot, 69686 Chassieu Cedex, France), Booth H3-E185. Pollutec is a leading European platform for environmental technologies, with a strong focus on water/wastewater treatment, circular economy, decarbonization, and waste valorization. For practitioners seeking robust, scalable solid-liquid and three-phase separation, the show is an ideal setting to compare equipment and real-world outcomes.

Technology focus

GN will showcase a portfolio covering the full sludge and effluent handling chain:

  • Decanter centrifuges: high-capacity bowls with optimized beach/taper geometries to improve clarification and cake dryness while maintaining competitive specific energy consumption.
  • Tricanters (three-phase): simultaneous separation of solids, water, and an organic phase (oils/fats), suitable for industrial wastewater, biodiesel, and by-product recovery.
  • Disc stack separators: high g-force polishing to cut residual suspended solids and reduce COD/BOD in final streams.
  • Integrated systems: tanks, polymer make-up, progressive cavity pumps, conveyors, and PLC/SCADA for automated operation and traceability.

Key applications

What visitors will see

  • Typical operating ranges (g-force, rpm, cut size d50, power, flow rates).
  • Solids control strategies (differential speed, dam adjustment, polymer optimization).
  • O&M best practices: polymer selection, mass balance, clean-in-place, wear management, and predictive maintenance.
  • Reference cases demonstrating CAPEX/OPEX reduction via standardized equipment and plug-and-play modules.

Why Pollutec

Pollutec’s value lies in technical benchmarking and peer exchange with operators, EPCs, and regulators. It’s a chance to contrast configurations (decanter vs. tricanter vs. disc stack), define selection criteria, and review performance indicators (solids in discharge, centrate/overflow clarity, energy per m³, and total cost of ownership).

If you plan to attend, we invite you to stop by Booth H3-E185 to discuss your process challenges and review data-driven configurations. We can also arrange a technical meeting during the show to review samples, flow envelopes, and effluent quality targets.

Pollutec Lyon 2025 | October 7–10 | Eurexpo Lyon | Booth H3-E185.

 

Shipment of GNLW223D Mini Decanter Centrifuges and Mud Recycling Units to Europe

GN Solids Control recently completed a shipment of compact solids control equipment for a client in Europe. The package includes four GNLW223D mini decanter centrifuges and four mud purification systems, consisting of two GNMS-600B units and two GNMS-1000B units. These systems are designed to improve solids separation during drilling operations such as HDD, geothermal drilling, and water well projects.

The GNLW223D centrifuge is the most compact model in GN’s decanter centrifuge lineup. Featuring a 9-inch bowl diameter, it is ideal for sites with limited space or where low-volume but high-efficiency solids separation is required. Despite its small footprint, it delivers high performance, with a maximum bowl speed of up to 4,500 RPM, ensuring efficient removal of ultra-fine solids from drilling fluids.

The GNMS-600B and GNMS-1000B mud purification systems are skid-mounted units that combine shale shakers with desanding and desilting hydrocyclones, providing three-stage solids control in a compact design. The 600B is suitable for mid-range flow rates, while the 1000B model is built for higher capacity operations. Both systems are designed for mobility and easy setup, making them suitable for various field applications.

These systems play a critical role in maintaining the quality of drilling mud, reducing water consumption, and minimizing equipment wear. By efficiently removing unwanted solids, they help stabilize boreholes and extend the lifespan of drilling tools. Additionally, they support compliance with increasingly stringent environmental regulations by reducing waste and fluid contamination.

This shipment demonstrates GN Solids Control’s continued expansion in the international market and its commitment to delivering dependable, field-proven solutions for cleaner and more efficient drilling fluid management.

 

Four Sets of Workover Solid Control Equipment Delivered to an Indonesian Client

GN Solids Control has recently completed the manufacturing and shipment of four sets of workover solids control equipment to a valued client in Indonesia. This project highlights our ability to provide complete mud management solutions for well servicing operations, ensuring reliable performance even in challenging field conditions.

Each solids control set is equipped with a carefully selected combination of units to optimize drilling fluid cleaning and enhance operational efficiency:

  • 8 GNZS593K Shale Shakers
    These high-performance shakers serve as the primary solids separation stage. With excellent handling capacity, they efficiently remove large particles, keeping drilling mud in optimal condition for reuse.
  • 4 GNZS593K-2S12N Mud Cleaners
    Designed as an integrated desander and desilter unit, this model offers fine solids separation after the initial shaker processing. Its compact and modular design simplifies both operation and maintenance in workover projects.
  • 4 Vacuum Degassers
    Removing entrained gases is critical to maintain mud stability and prevent pump cavitation. Our vacuum degassers ensure a consistent mud flow and enhance drilling fluid quality during operations.
  • 8 Jet Mud Mixers
    These units are essential for the fast and uniform mixing of drilling fluids with additives, ensuring that the mud meets the required specifications for each stage of the workover operation

The delivery of these four complete sets to Indonesia demonstrates GN Solids Control’s ongoing commitment to supporting international clients with reliable, field-proven equipment. By integrating our solids control solutions, operators can maximize mud reuse, reduce operational costs, and minimize environmental impact.

This successful project is another example of our expertise in providing turnkey solids control packages, tailored to the specific demands of oil and gas operations worldwide.

 

GNLWS364 Three-Phase Decanter Centrifuge Delivered to an Overseas Customer

GN Separation has recently delivered one unit of the GNLWS364 three-phase decanter centrifuge to an international customer, marking another step forward in our mission to provide advanced separation technologies worldwide. This machine is designed for continuous separation of solids, light liquids, and heavy liquids — ideal for industries such as food processing, chemical recovery, wastewater treatment, and more.

Technical Overview

The GNLWS364 is a precision-engineered three-phase decanter centrifuge capable of separating materials with different densities in a single, continuous process. It operates based on the difference in specific gravity between the solid and two immiscible liquid phases.

  • Bowl Diameter: 360 mm
  • Bowl Length: 1440 mm
  • Max Bowl Speed: 4500 RPM
  • G-Force: Up to 3200 G
  • Main Motor Power: 30 kW
  • Back Drive: 15 kW
  • Material: Duplex stainless steel for the bowl and wear-resistant alloy for critical parts

This machine adopts a horizontal design with a high-efficiency bowl, internal scroll conveyor, and a specially designed centripetal pump system to discharge the clarified liquids. The result is a highly efficient separation process even for complex mixtures with low solid content and minimal density differences.

Application Example

The overseas customer who received this unit specializes in used oil recycling and wastewater treatment. The GNLWS364 will be integrated into their continuous processing line to separate water, oil, and solid particles from oily sludge. Thanks to the adjustable differential speed and feed rate, the system can adapt to feedstock variability without interrupting production.

Advantages for International Operations

The GNLWS364 offers several key benefits for overseas clients:

  • Plug-and-play designfor easy installation
  • Integrated control panelwith PLC + HMI interface for remote operation and monitoring
  • Global voltage compatibility(can be customized to 380V/400V/460V – 50/60Hz)
  • Minimal maintenance requirementsthanks to wear-resistant components

The successful delivery of the GNLWS364 to an overseas partner demonstrates GN’s commitment to delivering dependable, efficient, and customizable separation solutions. Whether you operate in environmental services, food production, or energy sectors, our three-phase decanter centrifuge technology can be tailored to fit your needs.

 

GN Non-Excavation Mud Recycling Systems Delivered to the Middle East

GN Solids Control recently completed the delivery of a complete non-excavation (trenchless) mud treatment system to a customer in the Middle East. This shipment reflects the growing demand for high-efficiency and environmentally responsible solids control solutions in horizontal directional drilling (HDD) and other trenchless operations.

Overview of the Delivery

The equipment package includes two (2) complete 1000 GPM mud recycling systems, two (2) storage tanks, and three (3) mixing tanks. Each 1000GPM system is fully integrated with the essential components required to process drilling mud and reduce environmental impact.

Key Components:

✅ 1000 GPM Mud Recycling Systems (2 Sets)

Each system is designed for processing up to 1000 gallons per minute and includes:

  • 2 shale shakers: Efficiently remove large solids from the drilling fluids.
  • 1 mud cleaner: Combines desander and desilter hydrocyclones for finer solids separation.

This configuration ensures high mud recycling efficiency and supports continuous drilling with reduced downtime.

✅ 2 Mud Storage Tanks

These tanks serve as reserve storage for processed drilling fluids. They are designed to maintain optimal mud volume and provide flexibility during the drilling process.

✅ 3 Mixing Tanks

GN’s mixing tanks are used to prepare fresh drilling fluids or adjust the properties of the recycled mud. They come with mud agitators and mixing hoppers for efficient fluid blending and chemical dosing.

Advantages of GN Trenchless Mud Systems

  • Compact footprint for job sites with limited space.
  • Modular design, easy to transport and install.
  • Energy efficient components reduce operational costs.
  • Customizable configuration based on the client’s drilling program.

Supporting Trenchless Operations in Harsh Environments

The Middle East market often presents challenges such as high temperatures and abrasive ground formations. GN’s trenchless mud systems are built to operate reliably under such conditions, with robust materials and proven performance in demanding drilling applications.

With this delivery, GN Solids Control continues to demonstrate its commitment to providing top-tier solids control equipment for international trenchless drilling projects.

 

GN VFD Drilling Fluids Decanter Centrifuge

GN Separation recently supplied decanter centrifuges to an Asia-based drilling company to support its solids control and drilling fluid management operations. The delivery included 2 sets of GNLW363D-VFD centrifuges and 1 set of GNLW453D-VFD centrifuge. These units will be used on drilling sites to optimize the separation of solids from drilling mud, reduce waste, and improve overall fluid recycling.

About the Models

GNLW363D-VFD
This is GN’s workhorse 14-inch bowl VFD-controlled decanter centrifuge. It is designed for fine solids separation in drilling fluids processing. The variable frequency drive (VFD) allows operators to adjust the bowl speed and differential speed, optimizing the separation cut point depending on the mud properties. Typical bowl speeds can reach up to 3200 RPM. The 363D-VFD is widely used in oil and gas drilling solids control systems, offering reliable performance even under high solids loading.

GNLW453D-VFD
This is a 18-inch bowl VFD decanter centrifuge designed for higher capacity requirements. With a larger bowl diameter and longer beach, it can process higher flow rates while maintaining good separation efficiency. The VFD control allows flexible adjustment of operating parameters, making it suitable for different mud weights and drilling conditions.

Application in Drilling Operations

Drilling operations require precise solids control to maintain the quality of the drilling mud and reduce disposal costs. Decanter centrifuges are a critical component in modern solids control systems. They remove fine and ultra-fine solids that cannot be separated by shale shakers or desanders alone. By deploying GN’s VFD-controlled centrifuges, the drilling company can:

  • Maintain optimal mud weight and properties
  • Minimize dilution costs
  • Reduce waste volume for disposal
  • Improve overall drilling efficiency

Advantages of VFD-Controlled Centrifuges

Variable Frequency Drive (VFD) technology provides the flexibility to adapt centrifuge speed to different fluid conditions. Operators can slow down the bowl to reduce wear when handling lighter mud or increase speed for finer separation. The control panel also allows adjusting conveyor differential speed for better solids dryness.

Why GN Decanter Centrifuges?

GN Separation has years of experience manufacturing decanter centrifuges specifically for the oil and gas industry. Its centrifuges are designed for field conditions, offering robust construction, stainless steel bowls, tungsten carbide protection, and user-friendly controls. The VFD models are skid-mounted for easy integration into existing solids control systems.

By choosing GN’s GNLW363D-VFD and GNLW453D-VFD units, the Asia-based drilling company strengthens its solids control capability, ensuring better environmental compliance and lower operating costs on its drilling projects.

 

2 Sets GNOST-15 Oil Sludge Treatment System for Asia Customer

With environmental regulations tightening across the globe, oilfield service companies are under increased pressure to manage drilling and refinery waste in an efficient and eco-friendly way. Recognizing this demand, GN Solids Control has recently completed the delivery of two complete sets of GNOST-15 Oil Sludge Treatment Systems to a prominent environmental solutions company in Asia.
These modular systems are designed to recover oil, reduce waste volume, and meet discharge standards — all while lowering operational costs and environmental impact.

A Turnkey Solution for Oil Sludge Recovery
The GNOST-15 is a fully integrated system engineered to treat challenging oily sludge composed of oil, water, and fine solids. Each system includes:
Feeding Pump Module
This delivers a controlled feed of sludge into the system using a heavy-duty progressive cavity pump, ensuring stable flow and pressure throughout.
Premixing Tank Module
The sludge is heated and mixed with water and chemicals to reduce viscosity and prepare it for further separation, improving overall treatment efficiency.
High-G Shale Shaker Module
The first stage of physical separation removes larger solid particles and debris to protect downstream equipment.
Two-Phase Decanter Centrifuge (GNLW554)
Handles separation of fine solids and liquids, reducing TSS (total suspended solids) to manageable levels.
Three-Phase Decanter Centrifuge (GNLWS554)
Performs the crucial task of separating recovered oil, water, and residual solids in a single step, improving oil recovery and reducing disposal volume.
Chemical Dosing System
Ensures optimal demulsification and flocculation for efficient separation. The system is fully automated for precise dosage control.
Steam Generator
Provides thermal energy essential for lowering sludge viscosity and enhancing chemical reaction effectiveness.

Sustainability and Performance Combined
The GNOST-15 system demonstrates a holistic approach to oily waste management:
Oil Recovery: The system achieves a recovered oil quality with BS&W below 3%, enabling the oil to be reused or sold.
Cost Reduction: Recovered oil and water can be reused, significantly reducing the cost of fresh materials and disposal.
Regulatory Compliance: The system ensures that treated effluent and solids meet local environmental discharge standards.
Space-Saving Modular Design: All modules are skid-mounted and containerized, offering easy transport and installation at remote or compact sites.

GN Solids Control – Advancing Environmental Responsibility in Energy Sectors
This successful project reinforces GN’s commitment to supporting clients in Asia and around the world with advanced, practical, and environmentally responsible waste treatment technologies. From oil sludge treatment to solids control, GN continues to offer reliable solutions that improve both economic performance and environmental outcomes.

Containerized Tank Cleaning Oil Sludge Treatment System for European Customer by GN Separation

At GN Separation, we are committed to providing advanced and reliable solutions for challenging environmental and industrial issues. Recently, we have delivered a state-of-the-art Containerized Tank Cleaning Oil Sludge Treatment System to a prominent customer in Europe. This innovative solution is designed to address the growing concerns of oil sludge disposal and tank cleaning, ensuring both environmental compliance and operational efficiency.

Oil sludge, a byproduct of industrial operations, often accumulates in tanks and requires effective treatment to prevent environmental pollution. Traditionally, cleaning and disposing of oil sludge has been a complex and costly process. The client in Europe faced challenges with managing their tank cleaning operations, needing a more sustainable and cost-effective solution to treat and dispose of the oil sludge.

GN’s Solution: The Containerized Tank Cleaning Oil Sludge Treatment System

GN Separation’s containerized system is an all-in-one solution that simplifies the treatment of oil sludge and waste. The system is designed to be easily deployed in different locations, offering flexibility and efficiency. The treatment process utilizes advanced separation technology, including decanter centrifuges, to separate solid particles from the oily waste.

Key features of the system include:

  • Compact Design: The entire treatment system is housed in a standard shipping container, making it transportable and easy to install at different sites.
  • High Efficiency: The decanter centrifuge technology provides high-speed separation, allowing for effective removal of solids from the oil sludge.
  • Sustainability: The system promotes the recovery of valuable oil, which can be reused, reducing waste and environmental impact.
  • Versatility: It is adaptable to a wide range of tank cleaning applications, including oil and gas industries, marine operations, and more.

The system not only helps in treating oil sludge efficiently but also minimizes the environmental footprint of tank cleaning operations. By recovering valuable oil and reducing waste, this solution aligns with the increasing demand for eco-friendly technologies in the industrial sector.

GN Separation is proud to continue developing cutting-edge solutions that cater to the specific needs of our global clientele. This containerized tank cleaning and oil sludge treatment system is a testament to our dedication to innovation, quality, and sustainability.

 

GN GNLWS554 Three-Phase Decanter Centrifuge for USA Oil Sludge Treatment Project

Managing oily sludge is a critical challenge for environmental service companies operating in the oil and gas sector. In the United States, strict regulations require effective separation technologies to reduce hazardous waste volumes while recovering valuable resources. For a recent project in the U.S., GN Separation’s GNLWS554 three-phase decanter centrifuge has been selected to address these challenges, offering continuous separation of oil, water, and solids from complex sludge streams.

The GNLWS554 model is specifically engineered for separating emulsified and viscous oil sludges with high solids content. Its three-phase design enables simultaneous separation of oil, clarified water, and dewatered solids in a single continuous process. This capability is essential for treatment plants dealing with tank bottom sludge, API separator residues, or soil washing waste streams.
At the core of its operation is a large-diameter, high-speed rotating bowl that generates powerful centrifugal forces. These forces separate phases based on density differences, with an internal screw conveyor transporting solids to the discharge ports. The machine features wear-resistant materials and a variable-pitch conveyor to handle abrasive sludge while minimizing maintenance downtime.

For the U.S. project, the GNLWS554 was selected based on its processing capacity and its ability to meet local discharge and recycling requirements. By recovering oil suitable for reuse or sale, clarifying water for reuse or discharge, and reducing the volume of solids sent for disposal, the system helps the plant lower operating costs and comply with environmental regulations.


Integration with other treatment equipment is another key aspect. In this project, the decanter centrifuge is used in conjunction with progressive cavity feed pumps that handle viscous sludges reliably. Chemical dosing systems are employed to enhance phase separation, while storage tanks manage recovered oil and water streams. This integrated approach allows for automation and streamlined operation, reducing labor costs and operational risks.
Additionally, the GNLWS554 is designed as a skid-mounted unit, making it easier to transport, install, and maintain. For modular or mobile treatment setups, this is a significant advantage. Companies working on remediation projects or tank cleaning services often require flexible equipment that can be deployed to multiple sites efficiently.
Beyond cost savings, the three-phase decanter centrifuge supports sustainability goals by enabling resource recovery and reducing waste sent to landfills. In a regulated market like the U.S., offering an environmentally responsible solution can be a competitive advantage for service providers.
Overall, this project showcases the practical value of advanced separation technology in tackling real-world challenges in oily sludge management. The GN GNLWS554 three-phase decanter centrifuge exemplifies how engineering solutions can help companies meet stringent environmental standards while delivering efficient, reliable, and cost-effective operations.