Production of l(+)-lactic acid from acid pretreated sugarcane bagasse using Bacillus coagulans DSM2314 in a simultaneous saccharification and fermentation strategy

Table 3 Different fermentation processes containing high-grade sugars, inoculated with B. coagulans

Strain	Carbon source	C_s (g/l)	N-source (g/l)	C _LA (g/l)	A _LA (g)	Q _v,,av (g/l/h)	Q _v,max (g/l/h)	Y_s/LA(%)	Time (h)^a	Source
B. coagulans DSM2314	High-grade glucose + xylose	72 +24	10 YE, 20 PE	59.3	83	2.50	5.1	92	29	Van der Pol [15]
B. coagulans DSM2314	High-grade glucose + xylose	72 +24	10 YE, 2NH₄PO₄, 3NH₄SO₄	55.6	78.6	2.40	3.9	86	28	Van der Pol [15]
B. coagulans SIM-7	High-grade glucose	126	25 YE	89.3	–	2.8	5.8	90	31	Michelson [24]

Different nitrogen sources were used: YE yeast extract, PE peptone
C _LA concentration of lactic acid at the end of the SSF in g/l
A _LA total lactic acid produced in g
Q _v,av average volumetric lactic acid productivity in g/l/h
Q _v,max maximum volumetric lactic acid productivity in g/l/h
Y _s/La estimated conversion efficiency of sugar monomers to lactic acid in W/W
Y _Lc/La lactic acid production yield on total lignocellulosic sugars in W/W
^aTotal fermentation time, from inoculation of SSF to reaching final lactic acid concentration

ISSN: 2731-3654