in oder to avoid cracking the palm kernels, the pressure is normally reduced and and oil retention increases to 10-12% .
the resulting press liquor is a mixture of water , oil, dirt, and fruit debris in varying concentrations.
the liquor is processed further to maximize oil yield and reduce the moisture content in the CPO to /+10% .
this process,besides being critical to the quality of the CPO , lead to oil loss and environmental pollution.
After most of the oil has been recovered , palm oil mill effluent is left behind.
More oil can be recovered from POME when food grade solvents sush as hexane and petroleum ather are used for the oil extraction.