Decanter centrifuges are widely used for solid-liquid separation in industries such as wastewater treatment, oil and gas, mining, food processing, and chemical manufacturing. While operating parameters such as bowl speed and differential speed can be adjusted during operation, several critical mechanical factors are fixed during equipment design and manufacturing. These structural parameters have a direct impact on separation efficiency, solids dryness, throughput capacity, and overall machine performance. Continue reading
Category Archives: Decanter centrifuge
GN 14 Inch Sludge Dewatering Centrifuge Package for Southeast Asia Client
GN Separation has completed the manufacture and delivery of a 14-inch sludge dewatering centrifuge package for a client in Southeast Asia. The project underscores GN’s proven capability in delivering integrated solid-liquid separation solutions for both municipal and industrial wastewater treatment.
Meeting Tighter Environmental Standards
Across Southeast Asia, increasingly strict discharge regulations are driving wastewater treatment facilities to adopt more efficient and reliable technologies — particularly for handling complex sludge conditions. Removing fine and ultrafine suspended solids has emerged as a critical challenge in achieving stable effluent quality while keeping treatment costs under control.
Integrated Solution: Centrifuge + Chemical Dosing
GN supplied a complete sludge dewatering system built around a 14-inch high-speed decanter centrifuge, paired with a 1,000L polymer dosing unit. The design integrates chemical conditioning with centrifugal separation to treat difficult wastewater streams more effectively.
Conventional mechanical separation typically handles particles in the 2–5 micron range. By injecting polymer into the sludge stream, the dosing unit promotes aggregation of fine and ultrafine particles into larger flocs. These flocs are then efficiently captured under high centrifugal force inside the decanter — significantly boosting solid-liquid separation performance.
Key Benefits for the Customer
| Benefit | Detail |
|---|---|
| Finer particle removal | Polymer-enhanced flocculation captures particles below the conventional 2–5 micron threshold |
| Lower sludge moisture | Drier discharged cake reduces transport and disposal costs |
| Operational stability | Integrated skid-mounted design simplifies installation into existing systems |
| Regulatory compliance | Improved effluent quality supports stricter discharge standards |
Compact, Skid-Mounted, Ready to Deploy
The 14-inch decanter centrifuge targets small to medium-capacity sludge treatment applications, balancing separation efficiency, reliability, and energy consumption. Its compact skid-mounted configuration allows straightforward installation and easy integration with existing treatment infrastructure — making it suitable across a broad range of industrial settings.
Quality Assured Before Shipment
Prior to dispatch, the complete package underwent rigorous quality inspection and performance testing at GN’s manufacturing facility. Every component was verified against project specifications to ensure reliable commissioning and stable long-term operation at the customer site.
Strengthening GN’s Southeast Asia Presence
This successful delivery reinforces GN Separation’s growing footprint in the Southeast Asian market and demonstrates the company’s ability to provide tailored, integrated sludge dewatering systems that improve treatment efficiency, reduce operating costs, and support sustainable environmental performance.
Integrated Sludge Dewatering System for Southeast Asian Wastewater Treatment Project
GN Separation has successfully completed the manufacture and delivery of an integrated sludge dewatering system for a wastewater treatment project in Southeast Asia. Continue reading
One Batch of Screw Press and Chemical Dosing Unit for Overseas Customer
GN Separation has recently fulfilled a successful equipment delivery for an overseas client, covering a full set of sludge dewatering equipment and automatic chemical dosing units. The shipped equipment, including GN screw press sludge dewatering machines and matched chemical dosing systems, will be deployed to the client’s industrial sludge treatment project. It is expected to significantly boost sludge dewatering efficiency, optimize overall treatment processes, and cut long-term operational costs for the project.
GN Screw Press Sludge Dewatering Machine
The GN screw press sludge dewatering machine is a cost-effective, eco-friendly solution tailored for diversified sludge treatment scenarios. Adopting a mature screw extrusion solid-liquid separation principle, the equipment achieves continuous sludge thickening and deep dewatering through the powerful extrusion force generated by variable screw diameters and pitches, combined with the precise micro-gap filtration between fixed and moving rings.
Outperforming conventional sludge dewatering equipment, the GN screw press features low power consumption, fully automated operation, stable running performance, and simple daily maintenance. Its versatile adaptability enables wide application in municipal sewage treatment, industrial wastewater treatment, oily sludge disposal, food processing, chemical production and other industries.
The complete GN screw press dewatering system comprises a full-automatic control cabinet, flocculation conditioning tank, integrated sludge thickening and dewatering unit, and filtrate collection tank. Equipped with advanced intelligent control technology, the system supports automatic flocculant preparation and uninterrupted continuous dewatering operation. The treated filtrate can be either recycled for reuse or discharged up to standard, complying with diverse project environmental requirements.
Automatic Polymer Chemical Dosing Unit
Supporting the screw press dewatering system, GN Separation also delivered a customized automatic chemical dosing unit, which is professionally designed for continuous, efficient and stable polymer chemical preparation and dosing. The entire unit is constructed of high-quality stainless steel and adopts a three-chamber integrated structure, including independent preparation, curing and storage compartments to ensure graded and thorough chemical dissolution.
The unit features simple and intelligent operation. On-site operators only need to add dry powder chemicals to the preparation tank and start the system. The chemical-water mixture first enters the stirring and dissolving chamber for full homogenization, then flows into the curing chamber for sufficient maturation to stabilize chemical activity, and finally transfers to the storage chamber. The well-prepared chemical solution can be automatically and quantitatively delivered to the dosing points via supporting dosing pumps.
This automated dosing system effectively reduces manual intervention and labor costs, improves the efficiency and accuracy of polymer preparation, and maintains consistent dosing stability throughout the sludge treatment process, laying a solid foundation for standardized and high-efficiency sludge dewatering.
GN’s Global Strength in Sludge Treatment Solutions
Boasting extensive practical experience in global sludge dewatering and solid-liquid separation projects, GN Separation has always adhered to reliable product quality, professional technical services and continuous technological innovation. The company’s separation equipment has been exported to numerous countries and regions worldwide, winning wide recognition from global clients.
This successful overseas delivery further validates GN Separation’s comprehensive strength in providing one-stop, customized sludge dewatering solutions for international projects. Moving forward, GN Separation will continue to deliver high-efficiency, durable and energy-saving separation equipment, empowering global environmental protection and industrial waste and wastewater treatment projects.
Drilling Fluids Solids Control Centrifuge Unit for overseas drilling company
Recently, GN Separation successfully completed the manufacturing and delivery of several drilling fluids solids control centrifuge units for an overseas drilling company. The supplied equipment will be used for mineral exploration core drilling projects, oil drilling operations, and HDD (Horizontal Directional Drilling) mud treatment applications. Continue reading
Introduction about the Scroll of Decanter Centrifuge
The scroll, also known as the screw conveyor, is one of the most critical internal components of a decanter centrifuge. Installed inside the rotating bowl, the scroll rotates at a differential speed relative to the bowl. Its primary function is to continuously transport separated solids toward the conical end of the bowl for discharge. Continue reading
Containerized Three-Phase Decanter Centrifuge System for Oily Sludge Treatment in Africa
GN Separation is proud to announce the successful delivery of a containerized three-phase decanter centrifuge system to a valued client in Africa for oily sludge treatment applications. The system is specially designed to provide efficient oil-water-solid separation for various types of oily sludge generated from oilfields, refineries, tank cleaning operations, and industrial wastewater treatment processes. Continue reading
GN Containerized Sludge Dewatering System for Overseas Sewage Treatment Project
As environmental standards tighten globally and wastewater treatment capacity expands at an unprecedented pace, effective sludge management has emerged as a decisive factor in the success of modern treatment facilities. For overseas projects—particularly those constrained by limited site space, underdeveloped infrastructure, or compressed delivery schedules—conventional fixed-installation equipment often falls short in terms of adaptability and deployment speed. Containerized sludge dewatering systems have therefore risen to prominence as the preferred answer to these challenges.
Core Equipment: GNLW364-VFD Decanter Centrifuge
At the heart of this system sits the GNLW364-VFD Decanter Centrifuge, a purpose-built solid-liquid separation machine engineered for uninterrupted operation across fluctuating feed conditions. Its integrated Variable Frequency Drive (VFD) enables real-time adjustment of both bowl speed and differential speed, delivering peak separation performance regardless of sludge variability. This intelligent control translates directly into higher dewatering throughput, lower energy draw, and reduced long-term operating expenses.
Chemical Conditioning: 2000L Polymer Dosing Unit
Complementing the centrifuge is a 2,000-liter Polymer Dosing Unit, designed for accurate flocculant preparation and metered injection. Correct chemical conditioning is essential—it promotes robust floc formation, sharpens separation results, and drives down the moisture content of the final sludge cake. The dosing unit is built for dependable continuous service, with straightforward set-point adjustment and minimal maintenance demands.
Fully Containerized, Fully Integrated
All mechanical and process equipment is pre-installed inside two standard 20-foot shipping containers, creating a self-contained, weather-sealed, and transport-ready dewatering station. Key benefits include:
- Rapid deployment — minimal on-site assembly required
- Easy logistics — standard container dimensions fit global shipping routes
- Weather resilience — fully enclosed structure protects sensitive components
- Reduced civil works — no foundations or permanent buildings needed
These attributes make the system ideally suited for overseas installations where site preparation time and resources are scarce.
System Integration: GN’s Differentiating Strength
What sets this project apart is GN’s end-to-end system integration philosophy. Rather than delivering isolated machines, GN engineers a complete, turnkey solution—combining mechanical separation, chemical dosing, piping networks, electrical controls, and process automation into one cohesive package. Every stage of the workflow—sludge reception, polymer conditioning, centrifugal dewatering, and cake discharge—is pre-designed, pre-assembled, and pre-tested to ensure seamless commissioning upon arrival at site.
The engineering team paid particular attention to interior layout optimization within the container footprint, balancing safe access for routine maintenance, logical material flow, and compact space utilization. A centralized electrical control and monitoring system allows operators to manage the entire process from a single interface, boosting reliability while cutting labor requirements.
Looking Ahead
This project exemplifies GN’s commitment to delivering more than equipment—it delivers complete, application-specific process solutions. The containerized sludge dewatering system embodies the future of wastewater treatment: compact, mobile, intelligent, and efficient.
As the global push for sustainable water and waste management intensifies, GN continues to invest in advanced separation technology and integrated engineering capabilities. Through ongoing innovation and real-world project experience, GN is dedicated to helping customers everywhere achieve sludge management that is smarter, more cost-effective, and kinder to the environment.
Big Bowl Decanter Centrifuge for Overseas Paper Mill Wastewater Treatment
With the continuous tightening of global environmental regulations and the growing emphasis on sustainable industrial production, wastewater treatment in the pulp and paper industry has become an increasingly important focus worldwide. Paper mills generate large volumes of high-strength wastewater containing fibers, suspended solids, organic matter, and residual chemicals from pulping and bleaching processes. Efficient solid-liquid separation is therefore essential for reducing environmental impact, improving water recycling efficiency, and lowering operating costs. Continue reading
Big Bowl Decanter Centrifuge for Overseas Paper Mill Wastewater Treatment
As global environmental regulations keep tightening and the call for sustainable industrial production grows louder, wastewater treatment in the pulp and paper industry has garnered worldwide attention. Paper mills produce substantial volumes of high-strength wastewater, which is laden with fibers, suspended solids, organic matter, and chemicals used in pulping and bleaching processes. To minimize environmental impact and enhance water recycling efficiency, efficient solid-liquid separation is of utmost importance.
Sludge Dewatering Centrifuge: GN Separation’s Solution for Paper Mills
To tackle these challenges, GN Separation has successfully provided its cutting-edge Big Bowl Decanter Centrifuge, the GNLW554-VFD (featuring a 550 mm / 22-inch bowl diameter), for wastewater treatment applications in overseas paper mills. This equipment is engineered to deliver high-capacity, stable, and efficient separation performance, even under complex operating conditions.
The GNLW554-VFD decanter centrifuge stands out with its large 550 mm bowl diameter, which substantially boosts its processing capacity compared to traditional models. It is particularly well-suited for handling large volumes of industrial wastewater, making it an excellent choice for paper mill effluent treatment systems that demand continuous and reliable operation.
In paper mill settings, wastewater typically contains fine fibers, fillers like calcium carbonate and kaolin, and a high concentration of suspended solids. The centrifuge plays a pivotal role in separating these solids from the liquid phase, thereby alleviating the burden on downstream biological treatment systems and enhancing overall treatment efficiency. The separated solids can often be further processed or disposed of more cost-effectively, while the clarified liquid can be reused or safely discharged in accordance with environmental standards.
Paper Mill Wastewater Decanter Centrifuge: Advanced Features
The GNLW554-VFD model is equipped with a Variable Frequency Drive (VFD) control system, enabling flexible adjustment of bowl speed and the differential speed between the bowl and screw conveyor. This ensures optimal separation performance under varying feed conditions. Operators can easily fine-tune the operational parameters to strike the perfect balance between solids dryness and liquid clarity.
Moreover, the centrifuge is designed for robustness, capable of continuous 24-hour industrial operation. Its key components are crafted from wear-resistant materials to extend service life when handling abrasive slurry commonly found in paper mill wastewater. The compact structure also facilitates easier installation and maintenance, reducing overall operational costs for end users.
Overseas customers in the paper industry are increasingly favoring mechanical dewatering solutions like decanter centrifuges due to their smaller footprint, reduced chemical consumption, and higher automation level compared to traditional sedimentation systems. The successful implementation of the GNLW554-VFD further underscores GN Separation’s ability to deliver reliable and efficient separation solutions for global environmental protection initiatives.
GN Separation remains committed to innovation in solid-liquid separation technology, serving a diverse range of industries including wastewater treatment, mining, oil & gas, and chemical processing. The deployment of the big bowl decanter centrifuge in overseas paper mill projects represents another significant stride in supporting global sustainable development and reducing industrial wastewater.