Screening
Screening
Type of treatment: Pretreatment
Description:Separation of the polluted solid waste and sand and pebbles from the liquid phase (oil and/ or water). Screening is the term used for large particles (few cm’s, French equivalent is “dégrillage”, and few 10’s of dm, French equivalent is “criblage”). Sieving is the term used for smaller particles (few mm’s, French equivalent is “tamisage”).
Note. Some equipment are specifically designed to sort out metal from non-metal elements (and plastic from non-plastic), using magnetic sorting equipment.
Note. Some equipment are specifically designed to sort out metal from non-metal elements (and plastic from non-plastic), using magnetic sorting equipment.
Waste:
- Liquid
- Polluted sand and pebbles/ stones
- Polluted solid waste
Situation/Possibilities in the country:
Use of public work/ construction work equipment easy to import and implement in any country.
Interest:
Allows segregating the solid and sediment from the liquid phase for more specific waste treatment.
Entry criteria:
Any type of liquid with semi-solids and solid, polluted sand/ pebbles/ solid waste.
Operational constraints:
Requires personnel, specific screening equipment, energy, and storage for segregated material. May not be carried out on heavy / weathered / emulsified oil trapped in sediment without fluidization.
Possible installation ranges from simple screen to heavy industrial screening equipment.
Impacts:
Minimal if equipment is suitable, correctly operated and there are no oil leaks.
Legal constraints:
Refer to those applying to the transport, handling and storage of oil products.
Efficiency:
Depending on equipment.
Cost:
CAPEX and OPEX vary widely depending on the installation purchased/ rented.