the high production costs still exist due to the high costs in substrate pretreatment [4]. Currently,
an achievement of simultaneous saccharification and fermentation (SSF) of starch to lactic acid by the amylolytic lactic acid bacteria has been noted [3]-[5].
However, these studies were mostly performed by using batch fermentation
and under a sterile condition which increased the production costs due to an inoculum preparation
and
resterilization of the fermentation vessels.
In order to reduce the production costs,
therefore, the present research is aimed at producing lactic acid from the repeated-batch
and simultaneous saccharification
and fermentation of a synthetic cassava starch wastewater
by an amylolytic Lactobacillus plantarum MSUL 702 under a non-sterile condition.
The viable lactic acid bacteria (LAB) in the reactor and treatment efficiency of