Being free from organic solvents, pilot plants based on supercritical carbon dioxide have been established in
several countries for the extraction of curcumin from turmeric. Normal operating conditions for this are
at pressures between 25 to 30 MPa and a temperature of 318 K. There are also a few reports on
enzyme-assisted extraction, where pretreatment of turmeric with enzymes like α-amylase and
glucoamylase yielded significant increases in curcumin yield [20]. However due to increase in the cost
of extraction, this method is not commercially viable