1. General overview

1.1. Introduction

The centrifuge makes it possible to refine the cleaning of the material by removing the last impurities (tape, labels, dust, sand, etc.) and the humidity present after the washing step.

Today centrifugation techniques are very common in industry. There are several types of centrifuges but they often have complex geometries and therefore are difficult to replicate.

As with the shredder, the objective was to design, in the Plastic Odyssey workshop, a machine that can be built with simple materials found all over the world, with minimum technical skill and without complex tools.

The role of the centrifuge

The so-called vertical centrifuge separates the last impurities and water from the shredded plastic or more precisely expels them through a grid. All that remains is the dried plastic chips, ready to be stored.

The centrifugal effect is actuated by a rotating cylinder equipped with helical fins. This drives the plastics in a circular motion which projects them against a grid arranged all around the cylinder. The separation takes place during the projection where water and the last impurities are ejected outside the cylinder through the screen, while the larger chips remain inside.

1.2. The centrifuge on board the Plastic Odyssey

The Plastic Odyssey centrifuge has been developed for more than two years in Marseille.

It is the result of many encounters. In particular with recycling centers encountered locally, close to waste deposits in Cairo, Burkina Faso and Thailand.

It is the result of numerous meetings with experts. That means; a robust, efficient machine capable of handling all types of waste, but above all productive.

Why low-tech? In regards to its manufacturing process: a simple design, the use of universal tools and standard materials.

2. Technical guide

2.1 Technical datasheet

General characteristics

Model Plastic Odyssey
Version V1
Type Vertical
Dimensions (lenght x width x height) 180 x 80 x 170 cm
Mass 420 kg


Power supply Three phase electric - 380 V
Nominal power 6 kW
Main motor power 5.5 kW
Screw motor power 0.5 kW
Motor rotation speed 1 500 rpm
Rotor rotation speed 950 rpm
Transmission Belt


Material processing rate 100 à 200 kg/h
Materials processed Soft plastic, Hard plastic
Granulate size 5 to 30 mm
Sheet metal perforation diameter 2 mm

Economic and environmental

Power consumption 5.5 kwh


Construction materials Steel
Manufacturing cost 4 000€ tax included
Manufacturing time ± 5 days
Workforce 2 People
Difficulty ★ ★ ☆ ☆ ☆
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2.2. Connections and Sockets

Network Connections

Electrical Connection Three phase / Voltage 380V / Amps 16A
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Electrical Three phase plug socket 16A
Pneumatic Compressed air for cleaning
Hydraulic Access to a water tap for cleaning

3. User guide

3.1. Preparation

Mandatory protection:

Protective gloves

Safety shoes

Protective gloves

Safety glasses

Noise cancelling ear muffs

Necessary Equipment:

  • A collection bag for the granualte
  • A water pipe
  • An air compressor
  • A filtration system for waste water

Good practices:

  • Place a collection bag under the cyclone before starting the centrifuge
  • Introduce the plastic granulate into the hopper gradually
  • Respect the type of material to be introduced into the machine
  • Regularly check the level of the pollutant retention tray
  • Turn off the centrifuge to empty the water and pollutant retention tank
  • Treat the polluted water
  • Do not put your hands in the feed hopper
  • Ensure you have read the information specified in the information sheets: Jobsite Information Sheet, Safety Sheet


Before any use, visually check the mechanical condition. Periodically check the condition of the equipment (see maintenance sheet).

3.2. Usage

  • Place a collection bag under the cyclone
  • Start the engine by pressing the ON button
  • Add the plastic granaualte into the hopper

The presence of an operator is needed at all times to ensure the flow of material.

  • Change the granualte collection bag when it is sufficiently full

Stop introducing plastic into the hopper beforehand, then stop the engine before removing the bag.

  • Close the collection bag

Shutdown procedure:

  • Let the machine absorb all the waste still present in the hopper
  • Cut the power to the motor using the OFF button
  • Blow compressed air inside the hopper
  • Empty and clean the collection bin
  • Close recovery bag

3.4. Jobsite information Sheet

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4. Safety

4.1. Training

The operators who interact with the centrifuge must be aware of and respect the information relating to the use of the machine, the risks of using the machine, and the appropriate safety practices.

4.2. Risks

  • Crushing of fingers by the feed screw
  • Winding / entanglement of clothes or objects due to the rotating system
  • Projection of plastic chips
  • Cuts due to handling rough chips

4.3. Operator behavior

  • Do not put your hands in the hopper
  • Observe the type of material admissible by the centrifuge

4.4. Personal protective equipment

  • Safety shoes are compulsory throughout the workshop and around all the machines.
  • The operator has to handle plastic chips which can be rough, protective gloves are therefore mandatory to handle the chips safely.
  • Plastic chips can occasionally be violently thrown, therefore protective goggles must be worn.
  • The centrifugation of plastic waste generates a lot of noise. Ear muffs or ear plugs are necessary to protect the operator from the surrounding noises.
  • The operator must wear suitable work clothes.

4.5. Safety features

Safety features guarantee the safety of operators on the centrifuge. Make sure they are correctly installed before use:

  • The two enclosure doors are closed and locked.
  • The belt guard is correctly positioned and secured.

4.6. Work zone

A work zone around the machine is defined by a marking on the ground.
Access near the machine, whilst it is in operation, is permitted only to trained and equipped operators.

4.7. Jobsite information Sheet

The centrifuge is equipped with a Jobsite Information Sheet which includes all the information necessary for the use of the machine in good safety conditions. It must be positioned in view of all operators using the centrifuge.

4.8. Verification/Maintenance

Preventive and corrective maintenance activities must only be carried out by a person trained for this purpose. Each intervention must be recorded in order to keep a history of the maintenance actions carried out.

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5. Cleaning and Maintenance

5.1. Maintenance schedule

Day to day

General General inspection and search for wear and tear
Frame and doors Verification of the closing of the doors and of the operation of the closing sensors
Sieved grids Visual inspection of the positioning and fixing of the sieved screens
Transmission protection casing Visual inspection of the positioning of the protective casing
Safety devices Visual inspection of the accessibility of the emergency stop button


Bearings Visual inspection of the positioning of the fasteners
Sieved grids Check tightening
Safety devices Test emergency stop button


Rotor Lubricate the bearings
Frame Checking the fixings of the chassis on its base, Checking the general condition of the joints
Motor Checking the bearings and greasing
Transmission Checking the tension, alignment and general condition of the belts
Sieved grids Visual check of the condition of the sieved screens
Painting, Corrosion Checking the condition of the paint and touching up if necessary


Transmission Checking the pulley alignment

5.2. Cleaning schedule

Day to day

General Cleaning the workstation
Sieved grids Remove the debris present in the hopper
Rotor Blade cleaning
Water retention tank Emptying and cleaning the tank


Sieved grids Dismantling and deep cleaning of the sieved screens
Feed screw Cleaning the feed screw with water
Cyclone Cleaning the cyclone with water


Motor Cleaning the ventilation of the electric motor


General Complete cleaning of the centrifuge

5.3. Intervention protocol

Before performing any maintenance, adjustment or repair operation requiring partial or complete disassembly of centrifuge components, it is necessary to follow these protocols before the operation.


  • Set the power button to Off
  • Activate the emergency stop button, and if accessible, switch off the main power
  • Mechanically block the power button with a padlock
  • Check the absence of voltage on each of the active conductors (including the neutral) using a specially designed VAT device


  • Wait for the rotors and fans to come to a complete stop
  • Uncouple the belts
  • Mechanically block the rotor
  • Visually check for dissipation of motor force and immobilization of moving parts
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6. Machine compenents

6.1. BOM

Data under acquisition...

7. 3D / Plans

7.1. 3D files

Data under acquisition...

7.2. Drawings

Data under acquisition...

8. Manufacturing

8.1. Equipment list

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9. Download

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