YEAST BETA-GALACTOSIDASE IN SOLID-STATE FERMENTATIONS

A simple and economical system is proposed for prohucing beta-galactos idase with the yeast Kluyveromyces lactis in solid-state fermentations on corn grits or wheat bran moistened with deproteinized milk whey. B y means of a full-factorial design, we studied some conditions that im prove this production. Results of liquid- and solid-state cultures wer e compared with the latter proving to be more effective. We have demon strated that changing from liquid- to solid-state cultures does not pr omote beta-galactosidase secretion by Kluyveromyces lactis.