Discharge in natural environment
Discharge in natural environment
Type of treatment: Final disposal
Description:Discharge of water following decantation of washing effluents from operations (washing of solid waste, high pressure clean-up of pebbles, etc.).
Waste:
Recovered oil (from decantation)
Treated washing effluents (from washing operations).
Situation/Possibilities in the country:
During clean up operations, it is usually tolerated that recovered water (from the oil and water mix) is discharged directly in the sea, after decantation in decantation tanks. This discharged water will have very little to insignificant impact compared to the ongoing oil spill.
During waste treatment, more restrictive threshold value must be in force (as time and equipment should be available to treat adequately effluents):
· concentration for discharge at sea,
· daily volume limit for the discharge at sea.
Interest:
Avoids the treatment of lightly to very lightly polluted sea water resulting from clean-up operations.
Entry criteria:
HC content of the discharged water must not exceed certain amount – to be validated by the National Authorities.
Operational constraints:
Water must not be discharged close to sensitive areas.
Check the HC content of the discharged water.
Impacts:
None if HC content is low.
Legal constraints:
Refer to legislation related to coastal water quality.
Specific authorisation may be delivered.
Efficiency:
Complete.
Cost:
CAPEX: none.
OPEX: none (related to the cleaning operations).