Biofuel is a clean and renewable energy source. It is a renewable diesel fuel made from oil crops, wild oil plants, aquatic plant oils such as engineered microalgae, animal oils, food craving oil, and other raw materials through the process of transesterification. It is a high-quality substitute for petroleum and diesel, also known as “renewable oil”. The supply of biofuels is not controlled by OPEC, it is not restricted by mineral reserves, and it is cheap and stable. It plays an important role in the process of improving national energy security and environmental protection. Biofuel is a typical “green energy”. Developing biofuels is of great strategic importance for sustainable economic development, promoting energy substitution, reducing environmental pressure, and controlling urban air pollution. The GN decanter centrifuge and disc separator play an irreplaceable role in the biofuel processing process. It can be used not only for solid-liquid separation but also for liquid phase clarification and liquid-liquid separation of different densities, so as to obtain better biofuel and meet fuel requirements by indicators.


GN 2 and 3 phase decanter centrifuge:

  • GN has a 2-phase decanter centrifuge and a 3-phase decanter centrifuge, which can be applied to different process targets in biofuel production. GN 3-phase decanter centrifuge is commonly used to process the raw materials before 3-phase esterification and separation of free fatty acids, glycerol, and salt precipitates (such as potassium sulfate in glycerol treatment). The 2-stage decanter centrifuge is often used to re-wash salt precipitates, such as the separation of potassium sulfate produced in glycerol treatment.


GN 2 and 3 phase separating disc:

  • GN has a 2-stage disc stack separator and a 3-stage disc stack separator. The 2-phase disc stack separator is mainly used to clarify solids in the liquid phase, while the 3-phase disc stack separators can separate liquids with different densities, at the same time discharging the solid residue. In the biofuel production process, a three-stage disc stack separator is generally used to separate glycerin water from fatty acid esters and biodiesel washing. 2-stage clarifier disc stack separators are used to separate solid impurities from biofuel. Compared with the decanter centrifuge, the advantage of the disc stack separator is that the separated biofuel is cleaner and more complete. The disadvantage is that it is not suitable for high solids materials or materials with very large particles. Therefore, the decanter centrifuge and the disc stack separator are often used in the processes before and after biofuel production to achieve the optimal comprehensive goal.



Fuel ethanol processing technology: corn/cassava, milling, saccharification, hydrolase, fermentation, crude distillation (fuel ethanol), distiller’s grains, separation and dehydration (distiller’s grains as feed), fine distillation, condensation, fuel ethanol. In the separation and dehydration process, the GN C series high-speed decanter centrifuge is used to dehydrate distiller grains after crude distillation. C series high-speed decanter centrifuges are more comprehensive in separating and dehydrating distiller grains after crude distillation, with low residue alcohol content and high alcohol recovery. At the same time, the energy consumption of the follow-drying slag is low, which saves costs. In the biofuel processing process, the GN disc stack separator is abundantly used in methyl ester, glycerin, catalyst, soap removal, methanol, water washing methyl ester, fatty acid extraction, glycerin field desalination, and others.

The specially designed GN decanter centrifuge for plastic recycling allows the customer to make new products from used or dirty plastic. And also this processing is an environmental solution for plastic waste. The advantage of the GN centrifuge for plastic recycling is to have a high purity of grades after processing.


The typical process of Plastics Recycling by GN Centrifuge:

  • Plastic waste with air bubbles, surface effects, or dust will be cut into small pieces and sent to the conveyor’s storage hopper.
  • The screw conveyor will transfer the residual plastic to a plastic washing tank.
  • The mix in the wash tank will be transferred to feed the GN centrifuge for fast and efficient separation. The separated plastics are obtained with a significantly higher degree of dryness.

GN separation equipment and centrifuges can provide customers with solutions for the separation of mixed plastics and sheets, recycling of plastic fibers, processing of PET flakes, and hollow bodies of ground material. In addition, GN’s centrifuges and separation equipment can assist customers in the treatment or processing of medical plastic granules, carpet fibers, production waste granules, and returned containers. In addition, GN decanter centrifuges are also popular for recycling cable jackets and insulation.


GN branches or partners around the world can offer you local services for your plastic recycling business. PLC-controlled centrifuge allows our customers to have high separation precision and higher purity of the final product. The adjustable G-force machine provides the ability to separate different materials even for particles smaller than 1mm. Continuous operation with less labor and less maintenance means less investment and more return. Free technical advisor before order and rest assured that after-sales services bring more satisfaction to our customers. This is one of the main reasons why GN solids control has more repeat customers.

The development of the chemical and pharmaceutical industries is of great importance to human welfare, where mechanical separation and conveying equipment have been widely used. The decanter centrifuge and stack separator discs can be used to extract specific chemicals, classify and dehydrate chemicals and pharmaceuticals, and separate liquid mixtures of different densities. GN various transportation equipment and vacuum pumps for solids are also used in the transportation of chemical materials. In the chemical and pharmaceutical industry, users have a high demand for safety and stability. GN is committed to providing high-quality products to meet the requirements for safety and efficiency of operation. For these industries, GN took the best step forward to ensure product safety and reliability in product design and development aspects.

Separation and extraction of API (active pharmaceutical ingredient), pharmaceutical intermediates, teas, honeysuckle, Chinese yews, vitamin B5, pig brain protein, intestinal capsid, etc. API extraction process: network preparation, cutting, processing, drying, grinding, extraction (water extraction or solvent extraction: organic solvents such as ethanol), solid-liquid separation, ultrafiltration, concentration by evaporation (solvent recovery organic), drying, grinding, screening, packaging, sending to the preparation workshop for solids or liquids. In the solid-liquid separation process, GN C series explosion-proof high-speed decanter centrifuge or high-speed disc stack separator can be used to separate and remove impurities after alcohol precipitation to that the active ingredients dissolve in an ethanol solution; followed by high-temperature distillation of ethanol and complete separation of pharmaceutical ingredients. GN GNZS series vibrating screen can be used in the separation process

GN Solids Control manufactures centrifuges for the production of wine and beer to produce high-quality wine and beer. The function of the GN centrifuge is to perform separation and clarification during the production of wine and beer.

Wine production centrifuge

Must clarification and lees processing is very important for wine making, the GN decanter centrifuge can be used to clarify solids from liquid phases. Instead of using a rotary vacuum filter to perform the clarification, centrifugal decanter separation allows the must to remain in contact with the lees for a shorter period. As a result, the centrifuge minimizes the negative effects of the lees on the quality of the must, since the lees usually have a high phenol content. Compared with the conventional diatomaceous earth process, decanter centrifuge separation produces less waste in wine production for disposal with easy operation and lower maintenance cost. Cost-effective NG centrifuges offer decisive economic benefits in general for wine producers. The solids discharged from the GN wine processing centrifuge can be used as fertilizer for the vineyard. PLC and HIM automatic control centrifuge reduces processing time, ensuring efficiency for wine production. Quality is a fundamental factor for wine producers because the GN decanter centrifuge uses high-quality stainless steel, resistant to corrosion and acids, made from centrifugal casting or forging. The GN decanter centrifuge can meet the most stringent hygiene requirements. Finally, the bottom line is that the effective separation and clarification of the GN centrifuge for wine ensures producers have high-quality products.


Centrifuge for brewing

GN beer processing centrifuge is the best choice to produce high performance with consistent beer quality. In brewing, GN centrifuges can be used for a variety of applications including dehydration of beer grains, recovery of wort from hot trub, clarification of beer prior to filtration, recovery of beer from leftover yeast, separation of green beer, defined adjustment of turbidity, reduction of brewery wastewater. The GN centrifuge specially designed for brewing is the ideal choice for those applications. GN Customized Beer Centrifuge can meet the specific requirements of the brewing industry to reduce the cost during brewing. In addition, it is considered that our experienced engineers always have the product that can reduce beer losses, minimize wastewater and avoid fluctuations in the brewing process.


GN Solids Control is a leading decanter centrifuge manufacturer. And our supplier from Switzerland is the leading brand for centrifuge hydraulic driving systems. GN and our Switzerland supplier have been jointly working together to develop the full hydraulic drive centrifuge for international clients to meet the highest standard.

The hydraulic bowl and scroll drive system drive both the conveyor and bowl of a decanter centrifuge from the hydraulic pump unit by two hydraulic oil circuits.

The advantage of the full hydraulic drive centrifuge is for use in high temperature ambient for heavy mud with flexible bowl and differential speed. The compact one skid design makes it easier to rig up.


Model- GNLW363D-FHD

Bowl Size:            360x1270mm

Bowl Speed:       0-3400RPM (2328G)

Differential Speed:          0-70RPM

Motor Power:    45 KW

Driving System: Switzerland Hydraulic Drive

Max Capacity:    200GPM(45m3/h)

Max Torque:      4163 N.M

Dimensions(mm):            3000x2400x1860mm

Weight (KG):      3400KG

Principle of the Hydraulic Drive System -FHD Principle

The fully hydraulic system consists of A the Hydraulic Pump Unit, B the Bowl drive hydraulic motor, and C the Scroll drive.

The hydraulic pump unit A feeds hydraulic oil to the scroll drive C and the bowl drive B by means of two separate and individually independent operating circuits

An electric motor A1 drives the combined pumps A2 and A3. Each operating circuit is equipped with its own hydraulic pump and its own controls. The pump unit contains all setting devices and safety valves, as well as pressure gauges.

With this system, the bowl’s rotational speed, as well as the scroll’s differential speed, may be manually adjusted independently from one another, continuously and infinitely variable during the centrifuge’s operation.


Features of GN Full Hydraulic Drive Decanter Centrifuge

Model   GNLW363D-FHD

Bowl Material:   Duplex  SS2304/SS2205 from centrifugal casting

Screw Material: Stainless Steel SS 304/ SS 316

Screw protection:            Tungsten Carbide Tiles

Solids Discharge:              Tungsten Carbide Inserts

Bearing Brand:  SKF

FHD Brand:         Switzerland Hydraulic Drive

Electrical Control:             PLC Smart Control

Coating Brand:  Cosco & Kansai Zinc Rich Epoxy Coating