The decanter centrifuge (full name: horizontal spiral discharge sedimentation centrifuge) is a mechanical device that utilizes high-speed rotation to generate centrifugal force for continuous solid-liquid separation. Feed slurry enters the rapidly rotating bowl through a central feed pipe. Under centrifugal force, denser solid particles settle onto the inner wall of the bowl and are continuously conveyed toward the conical discharge end by a scroll conveyor rotating at a slightly different speed (differential speed). The lighter liquid phase overflows from the cylindrical end via adjustable weirs or is extracted by a centripetal pump—achieving efficient, fully enclosed, and uninterrupted solid-liquid separation.

Key Components

• Bowl: Cylindrical-conical design with wear-resistant lining; constructed from stainless steel (e.g., 316L, duplex 2205) or abrasion-resistant carbon steel.
• Scroll Conveyor: Rotates in the same direction as the bowl but at a controlled differential speed; surface-enhanced with tungsten carbide coating or ceramic tiles for wear resistance.
• Gear Differential: Planetary gearbox or hydraulic drive system ensuring stable torque transmission for reliable solids transport.
• Drive System: Dual-motor variable-frequency drive (main + auxiliary motors) enabling infinitely adjustable differential speed.
• Feed & Discharge System: Central feed tube, adjustable overflow weir, and optional centripetal pump for clarified liquid extraction.
• Control System: PLC + HMI touchscreen interface supporting parameter configuration, real-time monitoring, and fault alarms.

Core Advantages

• Continuous Operation: No need for shutdown during discharge—ideal for large-scale industrial applications.
• High Separation Efficiency: G-force up to 1,500–4,000 G, with ≥95% solids recovery rate.
• High Cake Dryness: Municipal sludge cake dry solids typically 25–35%; certain industrial sludges can exceed 40%.
• Low Operating Costs: Minimal polymer (flocculant) consumption, negligible wash water usage, and energy-optimized motor design.
• Fully Enclosed & Leak-Proof: Zero splashing or odor emissions—compliant with stringent environmental standards in Europe and North America.
• High Automation: Remote control capability with support for industrial communication protocols such as Modbus, Profibus, and Profinet.

General Technical Specifications for Municipal & Industrial Wastewater Applications

Industry Applications

As a cornerstone technology in water treatment and industrial solid-liquid separation, the performance of decanter centrifuges directly impacts project efficiency, operational expenditure, and environmental compliance. With its unmatched combination of continuous operation, high separation efficiency, low lifecycle costs, and sealed design, the decanter centrifuge has become the preferred solution for municipal utilities, industrial plants, and EPC contractors worldwide.

Global Support for International Projects

With extensive experience in exporting environmental equipment, we understand the diverse requirements across global markets—including certifications (CE, ATEX, GOST, SASO), multilingual documentation, logistics, and after-sales service. We offer:

• Precision Sizing & Process Design based on your sludge characteristics and throughput
• Complete Technical Documentation: CAD drawings, P&IDs, and user manuals in English, Chinese, Spanish, Arabic, Russian, and more
• Certification & Customs Support: Assistance with compliance and export documentation
• On-Site Commissioning & Training: Installation guidance, operator training, and remote diagnostics
• Reliable Spare Parts Supply: Global inventory with 48-hour dispatch commitment

If you are planning a wastewater treatment or industrial solid-liquid separation project, please share your feed sludge properties and capacity requirements. We will deliver a professional, efficient, and cost-effective decanter centrifuge solution tailored to your needs—helping you achieve sustainability, regulatory compliance, and operational excellence.

       Jiangsu Longdai Environmental Protection Group Co., Ltd. is an environmental protection equipment manufacturer with more than 15 years of experience. It has provided a large number of sophisticated environmental protection equipment at home and abroad, established three branches in China, and cooperated with many universities to build Longdai R&D center. There are 4 middle doctors, 10 masters, and 25 senior engineers.

       Main business: "Petrochemical Wastewater Treatment, Urban and Rural Wastewater Treatment, Waste Gas Collection and Treatment, Industrial Wastewater Treatment, etc."

       Main equipment: "Integrated treatment equipment, grille decontamination machine, sand water separator, mud scraper, air flotation device, dosing device, sludge thickener, rotary drum micro filter, conveyor,Manual and Mechnical Bar Screen ,Bridge Scrapers ,Ordor Control System,Belt/Screw Conveyor,Disc Filter etc."

       Work follows 5 principles:

1.Sales

       The sales team keeps abreast of market prices and provides customers with the most accurate and most favorable quotations.

2.design

       The technical team participates in technical exchange meetings every year, exchanges experience with professionals, continuously improves technical competitiveness, and provides customers with the clearest and most practical design solutions.

3.manufacture

       The processing team controls the manufacturing details of each equipment, and manufactures the most sophisticated and reliable equipment for customers.

4.transportation

       The transportation team has been to every corner at home and abroad, and has never made any mistakes, planning the best route, and transporting equipment for customers is the fastest and safest.

5.quality

       The company has passed ISO9001-2008 international standard quality system certification.

       We look forward to contacting you, please give us a chance. I hope we can trust each other for mutual benefit and win-win results.

       Best wishes.

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       The following is our company's information:

       Jiangsu Longdai Environmental Protection Technology Co., Ltd.

       Phone: 0510-87837699

       Fax: 0510-87837599

       Chinese website: www.zgldhb.com

       Foreign language website: http://www.longdaiwwt.com/

       Email: longdaicompany@126.com

       Address: No. 20, Chengwen Road, Gaocheng Town, Yixing City

       Zip code: 214214