A FEDBATCH STRATEGY FOR OPTIMAL RED PIGMENT PRODUCTION BY MONASCUS RUBER

According to the measurement of the pigment production and some materi al balance treatments, the monosodium glutamate (MSG), which represent s a main substrate involved in the production of red pigment by Monasc us ruber, is recovered on-line. Fedbatch operation then represents an alternative for increasing the production of pigment. A nonlinear quot ient control scheme is expressed to regulate the monosodium glutamate substrate at an optimal value determined from batch studies.