Abstract
Fermentation tests were performed with cooked and/or uncooked, polished aromatic red rice (Oryza sativa var. Indica, Tapol) and aromatic red rice bran using compressed baker's yeast and a preparation of glucoamylase produced by Rhizopus, sp. as saccharifying agent. The quality in terms of both aroma and taste of the red rice wine made with uncooked, unpolished aromatic red rice was much higher than that of rice wine made with cooked, unpolished aromatic red rice. However, the bran fraction of aromatic red rice was fairly resistant to the cooking process and this fraction was hardly affected or degraded by the cooking process. Furthermore, the bran fraction improved the quality of rice wine made from mash that contained cooked, polished rice which had a rather lower-quality aroma. In red rice wine brewing, the polished rice fraction of aromatic red rice may suffer from undesirable effects during the cooking process.
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