Characterization of Bacillus Strains Producing Biosurfactants - Environmental Sustainability: Role of Green Technologies - page 169

Fig. 1 Methods used for detection of biosurfactant-producing Bacillus strains

Table 3 Characterization of surface active properties of isolates grown in liquid media composed of different waste
products

Surface tension
(mN/m)

Drop-collapse
method

Oil spread
method (mm)

Hemolytic
activity Waste products Strains

Brewery effl uent 1 T-1 37.73 ± 1.05 + 4.67 +

T ′ -1 42.73 ± 0.58 − 17.67 +

I ′ -1a 33.05 ± 0.17 + 6 +

Brewery effl uent 3 T-1 34.43 ± 0.30 + 4.33 +

T ′ -1 39.21 ± 0.98 − 4 +

I ′ -1a 31.54 ± 0.57 + 10 +

Molasses T-1 26.64 ± 0.43 + 28.33 +

T ′ -1

29.25 ± 0.93 + 40 +

I ′ -1a 28.45 ± 0.54 + 40 +

Fruit and vegetable T-1 31.55 ± 0.91 − 2.33 +

decoction T ′ -1 36.55 ± 0.28 − 2.67 +

I ′ -1a 30.82 ± 0.64 − 6.67 +

According to Płaza et al. ( 2011 )
Surface tension (ST) data are means ± standard deviation of three independent experiments; ST of water:
71.79 ± 0.3 mN/m