Biosurfactant-Producing Lactobacilli: Screening, Production Profiles, and Effect of Medium Composition

Table 3

Biomass concentrations (g dry weight l⁻¹), biomass percentages (as compared to medium D that was set to be 100%), and surface tension reductions (mN m⁻¹) in the culture broth supernatants (excreted biosurfactant) and for the PBS extracted solutions (cell-bound biosurfactant), obtained for L. paracasei ssp. paracasei A20 grown in the different culture media at 72 h of culture. Results represent the average of three independent experiments ± standard deviation.

Medium	(Biomass); (gL^−1)	% (w/w); Biomass	Reduction of culture broth surface tension; (mN m^−1)	Reduction of PBS surface tension; (mN m^−1)
A	0.378	15.5	3.5±0.4	16.7±0.7
B	0.669	27.4	2.1±0.4	15.3±0.6
C	1.959	80.1	3.6±0.4	16.8±0.5
D	2.446	100.0	6.4±0.2	21.8±0.4
E	1.847	75.5	8.0±0.3	24.5±0.4
F	2.294	93.8	7.9±0.4	24.3±0.5
G	2.327	95.1	3.5±0.3	16.8±0.4
H	0.094	3.8	0.6±0.2	—
I	2.805	114.7	6.4±0.3	21.7±0.3