Washing of heavily oiled solid waste

Washing of heavily oiled solid waste

Type of treatment: Treatment

Description:
Washing the solid waste from the oil before the storage or other final disposal using various techniques:
==> Cold Water Flushing, simple technique, moderately successful, to wash large quantities of oiled debris with a high pressure hose to loosen and float away oil. The resulting oil/water mixture can then be treated via a separator
==> Warm/Hot Water Flushing to clean pebbles, gravel and sand contaminated with oil or emulsion, using standard mineral processing equipment coupled to a conventional oil/water separator.
==> High velocity steam jets directed onto an inclined, vibrating, perforated tray placed above a collector to trap oil and condensate, may be used to clean oil-contaminated sand. Possible use of demulsifier.
==>Solvent Extraction may be considered as a possible mean of removing oil from collected sand, pebbles and debris. Limited research has been carried out in relation to the use of this technique.

Waste:

Polluted solid waste and sediment


Situation/Possibilities in the country:

Small installations are easy to implement (however, depends on the size of the equipment).


Interest:

Recovery of recyclable material (e.g. plastic and other type of waste).
Possibility of incinerating the cleaned waste or storing the cleaned waste in landfills.
Possible recovery of oil (if decantation / centrifugation is used after the washing).


Entry criteria:

Any type of heavily oiled solid waste or sediment.


Operational constraints:

Requires personnel, specific site, washing equipment, energy, washing effluents management facility, cleaning products and large volumes of water.


Impacts:

Minimal if the washing effluents are managed correctly.
However, requires large volume of water.


Legal constraints:

Refer to those applying to the management of oily water.


Efficiency:

Depending on the equipment used.


Cost:

OPEX: around 150 Euros / m3 (Source: KOLLER)
CAPEX and OPEX vary depending on the size and flow rate of the installation.

published on 2019/12/10 15:55:06 GMT+0 — last modified 2019-12-10T15:55:06+00:00