Industrial Decanter Centrifuge for Wastewater Treatment - High-Speed Solid-Liquid Separation

Industrial Decanter Centrifuge for Wastewater Treatment - High-Speed Solid-Liquid Separation

Product Item : DLW
Category： Decanter Centrifuge
Certification:CE Certificate
Core Components: PLC, Engine, Bearing, Motor, Gear
Keyword: calcium hypochlorite separation
Description: Solid-liquid Separation Machine
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Decanter centrifuge descriptions

Decanter centrifuges support solid-liquid separation in a seamless, continuous process. Stand out from the competition with high-performance separation that delivers clarified or extracted products of exceptional quality and superior commercial value. Recover valuable raw materials, reduce energy consumption, and lower your environmental footprint and waste management costs—always backed by service expertise for optimal performance and long-term reliability of your decanter separator.

How does a decanter centrifuge work?

During solid-liquid separation, centrifugal forces act on the process stream, causing the denser solid particles to migrate outward toward the rotating bowl wall, while the less dense liquid phase forms a concentric inner layer in an Alfa Laval decanter centrifuge. Regardless of whether it is a decanter for water, food, or energy applications, interchangeable power recovering tubes or plates are employed to adjust the liquid depth, or “pond level,” to meet specific process requirements. The solids are continuously removed by a screw conveyor rotating at a different speed than the bowl. This controlled speed differential enables the gradual transport of separated solids out of the pond and along the conical section, or “beach,” for efficient discharge.

Centrifugal forces within DAGYEE decanters compact the solid phase and expel surplus liquid, resulting in a dewatered "cake" that is subsequently conveyed and discharge from the bowl. The clarified liquid phase—or multiple phases in the case of three-phase separation—overflows the dam plates or PowerTubes situated at the opposite end of the bowl. Internal baffles within the decanter casing direct each phase into its designated flow path, ensuring proper collection and eliminating cross-contamination risk. To accommodate fluctuations in the incoming solids loading, the speed of the screw conveyor may be automatically adjusted via a variable frequency drive (VFD) in combination with a torque control system, which continuously monitors the torque load on the conveyor. When solids loading increases, the system automatically adjusts the differential speed to prevent torque overload, ensuring stable operation and consistent dryness of the discharged solids. Conversely, under lighter loads, this speed is reduced to minimize wear and energy consumption.

Decanter centrifuge advanced operation capabilities

Clarification

Clarification removes suspended solids from a liquid of lower density across a particle size range from 1 to 10,000 microns. By increasing centrifugal force, even submicron particles can be separated, making this process ideal for high-purity applications in chemicals, mining, and waste management.
Classifying
Through controlled reduction of residence time, the decanter achieves sharp separation cuts for particle-size classification down to the submicron range. This capability is essential for processes requiring precise particle distribution and custom engineering solutions.
Liquid/liquid separation
The efficiently separates immiscible liquid phases of different densities, with or without solids present. This is critical for oil recovery and industrial wastewater treatment, where mechanical dewatering and centrifugal separation reduce reprocessing and disposal costs.
Thickening
Fine solids separated from the liquid can be thickened in a hindered settling mode, utilizing the cylindrical section of the bowl for maximum compression. This improves solids handling and reduces downstream load, contributing to operational efficiency.
Compression and dewatering
Compactive dewatering combines drainage and compression to achieve a higher degree of dryness, even with compressible solids. The degree of dewatering depends on solids characteristics, machine settings, and required dryness levels. Optimized conveyor and cone geometry, along with differential speed control, ensure stable discharge of pasty or shear-sensitive solids—key for waste management and cost reduction.
Counter-current washing
Integrated washing systems allow efficient, cost-effective removal of contaminants by separate discharge of wash liquor over multiple sections. This reduces chemical and water consumption, aligning with sustainability and process optimization goals.
Mixing and re-suspension
Special discharge geometries enable solids to be mixed with liquid directly at the outlet, eliminating the need for additional mixing vessels. This feature simplifies plant design and enhances operational efficiency.
Automation and innovation
Control systems for smart operation
Control systems stabilize separation quality, automate setpoints, and provide diagnostics that support predictive service strategies. As the “brain” behind the process, strengthens industrial automation and helps maintain equipment reliability through better visibility, alarms, and optimization tools.
Engineered for tough conditions
A broad choice of materials of construction, wear protection, and sealing options extends service life in abrasive or corrosive duties. Features like CIP, optimized bearings and seals, and gas-tight/pressurized casings are designed to lower maintenance effort while keeping performance high.
Options that boost performance
Depending on application, It can be equipped with energy-recovery weir plates, specialized feed systems to reduce particle breakage, and multiple drive/gearbox configurations—each selected to match duty conditions and performance targets.

Decanter centrifuge specifications

1. All contact parts can be made by SS304/SS316L/Duplex Steel 2205.
2. Automatic adjustment of differential speed via VFD,Siemens PLC Spiral.
3. Two motor drive.
4. Approximately 80 to 90% of the oil is recovered.
5. Low labor costs due to continuous and automatic operation.
6. Highest g-force for higher solids output.
7. Belts for both primary motor and secondary.
8. NSK/SKF Bearing.

Model	Drum diameter mm	Length mm	Maximum speed rpm	Highest separation factor g	Mixture capacity m³/h
LW250-900	250	900	5000	3500	0.5-3
LW350-1500	350	1500	3800	2850	1-5
LW400-1200	400	1200	3400	2581	1-8
LW400-1600	400	1600	3400	2581	2-10
LW400-1800	400	1800	3400	2581	2-12
LW450-1800	450	1800	3200	2572	5-20
LW450-2000	450	2000	3200	2572	5-25
LW530-2280	530	2280	2800	2350	10-50
LW600-2400	600	2400	2600	2265	15-65
LW650-2600	650	2600	2400	2100	20-80
LW720-2500	720	2500	2200	1950	25-90
LW800-2560	800	2560	2000	1800	30-100
LW800-3200	800	3200	2000	1800	30-110
LW900-3200	800	3200	1800	1650	30-150

Why choose the DAGYEE decanter centrifuge?/Decanter centrifuge advantages

Continuous, flexible, and reliable operation

The maintains consistent separation results even when feed volume, conditions, or product characteristics fluctuate. Its robust solid-bowl design, low-vibration operation, and precise differential speed control support uptime and equipment reliability, minimizing process interruptions in continuous duty.

Modular design for a perfect fit

Starting from a strong base machine, the decanter can be configured with application-specific features to match clarification, thickening, dewatering, liquid–liquid, and classifying duties. This modularity enables custom engineering solutions that scale as requirements evolve—streamlining commissioning while improving process optimization across lines.

Safety and compliance for hazardous applications

For solvent-rich or potentially explosive atmospheres, the offers gas-tight, vapor-tight and pressurized designs, with configurations suitable all kinds of environments. This safeguards people and assets while preserving throughput and separation performance—key to operational efficiency in high-risk settings.

Decanter centrifuge key features

1. High G-force for efficient separation atultra-high speeds.
2. PLC with HMl for automatic mode settingssludge dryness adjustments, and alarm monitoring.
3. Adjustable solid transport speed forvarying solid loads and dryness.
4. Multiple material options, wear protection,motor power, and gearbox torque choicesto meet diverse needs.

Decanter centrifuge applications

Food and beverages: Brewery/ Casein, lactose, and cheese fine recovery/ Coffee and tea/ Distilleries/ Juices/ Plant-based drinks/ Plant-based proteins/ Starch/ Wine

Life science and biotech: Fermentation/ Biomass separation
Oils, fats, and animal proteins: Avocado oil/ Fish processing/ Insects/ Olive oil/ Palm oil/ Rendering/ Seed oil/ Surimi processing
Biofuels: Bioethanol/ Biodiesel/ Biogas
Wastewater: Industrial wastewater treatment/ Municipal wastetwater treatment/ Potable water treatment plant
Energy: Battery recycling/ Ground engineering/ Mineral exploration drilling/ Mining and tailings/ Pulp & Paper/ Zero Liquid Discharge