초록
<P><SMALL>D</SMALL>-Lactic acid production from dry biomass of the microalga, <I>Hydrodictyon reticulatum,</I> was carried out in a 5-l jar fermentor (initial pH 6, 34 °C using CaCO<SUB>3</SUB> as a neutralizing agent) through simultaneous saccharification and co-fermentation using the <I>Lactobacillus coryniformis</I> subsp. <I>torquens.</I> After 36 h, 36.6 g lactic acid/l was produced from 80 g <I>H. reticulatum</I>/l in the medium containing 3 g yeast extract/l and 3 g peptone/l in the absence of mineral salts. The maximum productivity, average productivity and yield were 2.38 g/l h, 1.02 g/l h and 45.8 %, respectively. The optical purity of <SMALL>D</SMALL>-Lactic acid ranged from 95.8–99.6 %. <I>H. reticulatum</I> is thus a promising biomass material for the production of <SMALL>D</SMALL>-Lactic acid.</P>