Abstract

The production of lactic acid from fresh cassava roots by Steptococcus bovis using membrane bioreactor was investigated. Single-stage membrane bioreactor (MBR) without purging was conducted to find out the concentration and productivity of the lactic acid obtained. The result showed that in a single stage MBR, the lactic acid productivity and concentration were 1.88 g/Lh and 15.7 g/L, respectively which were obtained at dilution rate of 0.12 h^-1 and 30 g/L feeding sugar concentration. The result also indicated that the MBR bioreactor operation showed excellently and potentially for the production of lactic acid directly from fresh cassava roots by S. bovis.

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