Purification of lactic acid from fermentation using an anionic resin in a fluidized bed reactor

CORDOBA, PR; RAYA-TONETTI, G; SIÑERIZ, FAUSTINO; PEROTTI NI

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Año: 1999 vol. 29 p. 31 - 34

0327-0793

Abstract Amberlite IRA 400 was used to improve lactic acid recovery directly from fermentation. The breakthrough curve was obtained at pH 8.0 in fluidized bed mode giving a binding capacity of 0.358 g lactic acid/g resin. The downstream treatment of the culture broth was performed in a fasten way utilizing an upflow fluidized bed column operating at an ascensional velocity of 720 cm/h. The amount of lactic acid bound on the resin in this work was 0,295 g lactic acid / g resin which means more than twice of the adsorption obtained previously. The lactic acid eluted from the column achieved 67% of lactic acid bound on the resin.