Environmental & Wastewater Decanter Centrifuge

GN-ED (Environmental Decanter) series decanter centrifuge is designed for environmental industry for sludge dewatering, waste water treatment, waste oil recovery and treatment. The decanter centrifuge was invented over 100 years ago. It is also called solid bowl centrifuge, or decanter. The decanter centrifuge have been proved to be the most cost-effective solution for sludge treatment, waste water treatment and waste oil recovery include solids liquid separation, sludge dewatering and sludge thickening.

The main target of separation from the liquid and solid phase is to get solid phase with the least possible residual moisture. And at the same time the decanter need to minimize possible solid particle residues in the separated liquid phase.

Environmental Centrifuge 1

GN Environmental Decanter Centrifuge Model:

Bowl Diameter 220 mm
(9 Inch)
360 mm
(14 Inch)
450 mm
(18 Inch)
550 mm
(22 Inch)
650 mm
(25.6 Inch)
760 mm
(30 Inch)
Bowl Length 924 mm
(36.4 Inch)
1512 mm
(59.5 Inch)
1890 mm
(74.5 Inch)
2310 mm
(91 Inch)
2730 mm
(82 Inch)
3328 mm
(131 Inch)
Max Speed (RPM) 4500 3900 3500 3150 2900 2650
Max G Force 2492 G 3063 G 3084 G 3051 G 3058 3000 G
Beach Angle 11/15/20 Degree (Optional for different applications)
Control System VFD + PLC +HMI
Bowl Material Stainless Steel SS2304/SS316/SS2205 by centrifugal casting
Screw Protection Tungsten Carbide Tiles / Hard Facing


Environmental Centrifuge 2

GN Environmental Decanter Centrifuge Features & Benefits

  • GN-ED series centrifuge is specially designed for sludge treatment.
  • GN-ED series centrifuge bowl material is Duplex Stainless Steel 2304 made from centrifugal casting.
  • The screw conveyor inside the bowl is protected by Tungsten Carbide Tiles for longer operation.
  • GN-ED decanter reduce total disposal volume by as much as 70%
  • GN-ED decanter discharge stackable cake  free of liquid
  • PLC and VFD controlled automatically operation to meet different applications.
  • Less people required, and low maintenance with continuous operation
  • Minimize footprint and easy installation.
  • Compared to Filter Press, GN-ED Decanter have No filter cloths or belts to maintain/replace
  • The bearing is SKF premium bearing for reliable operation.

Compared to other separation equipment, the advantages of the decanter centrifuge are its wide range of potential use coupled with its continuous operation and ability to accept a wide range of feed material. The decanter centrifuge can be used for most types of liquid/solid separation. The function of the sludge treatment decanter centrifuge include dewatering sludge to dry cake, classification of solids in liquid suspension, or clarification of liquids and recovery of required solids.

GN  Sludge Treatment Decanter Centrifuge Application

  • Municipal or Industrial Sludge Dewatering
  • Industrial waste water treatment
  • Digested Sludge dewatering
  • Thickening of activated sludge
  • Animal Waste Treatment
  • Dissolved air flotation sludge treatment

GN Wastewater Decanter Centrifuge

GN-ED series are high performance decanter centrifuge designed for waste water treatment for different types of municipal and industrial wastewater.GN-ED decanter centrifuges are widely used in municipal and industrial wastewater treatment plants for the purpose of producing a clean, safe water discharge within the required limits. As the environmental considerations and the consent limits are becoming more and more strict .The New waste water treatment plants built today are becoming more and more sophisticated, but to improve the efficiency of waste water treatment, the GN-ED decanter centrifuges are extensively used for liquid-solid separation, sludge dewatering, and sludge thickening applications.

GN Waste Water Decanter Centrifuge Features and Benefits

  • GN-ED series centrifuge is widely used for waste water treatment around the world.
  • Continuous operation with optimized performance
  • Maximum the solids cake dryness to reduce disposal cost.
  • Minimum specific power consumption and polymer demand to save treatment cost.
  • Optimized operational labor costs by PLC and VFD controlled automatically operation.
  • Easy cleaning and hygiene by flushing without dismantling the machine for cleaning
  • Durable wear protection for the screw conveyor, solids discharge and slurry distribution port by Tungsten Carbide.
  • GN-ED series centrifuge bowl material is Duplex Stainless Steel 2304 made from centrifugal casting.
  • Minimize footprint and easy installation.
  • GN-ED Decanter have No filter cloths or belts to maintain/replace
  • The bearing is SKF premium bearing for reliable continues operation.

Typical Application of GN-ED decanter centrifuge

Typically, the GN-ED decanter centrifuge can be used for two applications for the wastewater treatment facilities and wastewater treatment projects.

  1. Thickening Application: Before feeding to biological digester,the GN-ED decanter centrifuge can be used to thicken liquid slurry around 2% dws.to  about 9% dws. This will improve the efficiency of the biological treatment.
  2. Dewatering Application:  The solids come from the clarifier after biological treatment can be sent to GN-ED decanter centrifuge for dewatering treatment. The GN-ED decanter Centrifuge will produce a relatively dry stackable cake of leach free solids prior to transportation or disposal.

The GN-ED decanter centrifuge can be used for more waste water treatment include but not limited to following:

  • Waste Water from Agricultural processing
  • Food processing and wastewater processes
  • Industrial manufacturing processes discharged waste water.
  • Waste sludge or water from Meat packing and rendering
  • Mining or Chemical processing waste water.
  • Paper processing waste water.
  • Potato and root crop processing
  • Steel production waste sludge and water.
  • Dewatering of municipal and industrial sludges
  • Dewatering the concentrated sludge off clarifier bottoms
  • Dewater the sludge off DAF systems
  • Thickening and dewatering of biological sludges

Waste Oil Decanter Centrifuge

GN-ED waste oil treatment or oil recovery decanter centrifuges specially equipped to meet the separation requirements of the waste oil processing industry with specialized separation equipment and systems technology. The GN-ED decanter centrifuge series were designed and developed for high capacity waste oil treatment. Because of the special design, GN-ED decanter centrifuge is capable to maximize the oil recovery, solids capture and cake dryness.

GN not only provides the individual waste oil treatment decanter centrifuge, but also we can provide complete waste oil treatment or recovery package system. This typically include transfer pumps, premixing unit, primary screening machine (shale shaker), 2 phase decanter centrifuge, 3 phase disc centrifuge, chemical dosing system etc. This complete package is a turnkey solutions for clients for the waste oil treatment or oil recovery.

The main application of the waste oil decanter centrifuge include following:

  • Waste oil from storage tank bottom
  • Waste Oil sludge lagoons
  • Oil refineries slope oil or waste sludge
  • Oil water and solids mixtures from ship ballasts
  • Separation equipment discharged waste oil
  • Drilling waste oil from oilfield
  • Discarded lubricant oils and emulsions or other
  • Industrial waste  oil  and water and emulsion

The waste oil treatment system design vary depending on the make-up and source of the waste stream and also it vary because of the goal is different. But typically, the waste oil treatment system will include following:

  • Mechanical removal of solids by different separation machine.
  • Pre-mixing and Heating system to reduce viscosity and thus enhance mobility of waste material.
  • Chemical dosing to break emulsions and make oil, water and solids bound in the emulsion accessible for easier separation by G force.
  • In order to enhance solids removal rates and the discharged cake dryness, normally polymer will be used.