Separation and recovery for

re-use of Oily Sludge

The production and disposal of oily sludges are considered as one of the most critical environmental issues in the petroleum industry, particularly in the petroleum producer countries. Annually, large quantities of oily sludges (more than 60 million tons) are generated and more than 1 billion tons of oily sludge has been accumulated worldwide.

Oily sludge in refineries
In particular, the sludge generated during the petroleum refining process has received increasing attention in recent years. It has been estimated that one ton of oily sludge is generated for every 500 tons of crude oil processed. Oily sludge is a complex and variable hazardous waste depending on the quality of crude oil as well as the processes used for water-oil separation. In general, oily sludge is composed of 40-52% alkanes, 28-31% aromatics, 8-10% asphaltenes, and 7-22.4% resins by mass. In addition, the oily sludge contains the heavy metals such as Zn, Cd, Pb, Cr, Cu, Ni and V.

Because of variations in the chemical composition of oily sludges, its physical properties such as density, viscosity, and heat value can vary significantly. Based on the integrated waste management strategy, three approaches including source reduction, oil recovery and disposal using different technologies such as thermal processes and biodegradation have been reported for oily sludge treatment.

Economical and good news for the environment
The development of environmentally friendly and economical technology for oily sludge management and treatment has for years been on the agenda of being a necessary achievement of sustainable development in the petroleum industry.


Enhanced Oil Recovery with Mud Split from Norwegian Technology AS


The oily sludge treatment with the Norwegian Technology solution allows for the separation and recovery for reuse of the different components of the sludge, namely oil, water and solids. The process takes place at ambient and heated temperature with the use of proprietary chemicals.
Oily sludge is a complex emulsion of various petroleum hydrocarbons (PHCs), water, heavy metals, and solid particles. Due to its hazardous nature and increased generation quantities around the world, the effective treatment of oily sludge has attracted widespread attention. Many methods deal with PHCs in oily sludge either through oil recovery or sludge disposal.




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Oily Sludge

Refinery acceptance of crude oil is normally less than 1% Basic Sediments & Water (BS&W)


The theory is that Mud Split chemistry alters the wettability on the fine particles in the sludge from being oil wetted to water wetted. This alteration allows for significant enhanced recovered oil that can become products at the refinery. 


MUD SPLIT chemistry effetively separates the
different components of the sludge, namely oil,
water and solids.