Parameters  Industrial waste Control Microbial isolates
BS-A BS-J BS-K BS-P
Foaming     Distillery waste -ve +ve +ve +ve +ve
Curd Whey -ve +ve +ve +ve +ve
Sugar industry effluent -ve -ve -ve -ve +ve
Fruit processing waste -ve -ve -ve -ve +ve
Emulsification index (%) Distillery waste - 43±0.8 47±0.8 40±0.8 54±0.8
Curd Whey - 50±2.4 51±2.2 49±1.6 55±1.5
Sugar industry effluent - 20±3.3 23±0.8 22±2.4 30±2.8
Fruit processing waste - 35±0.8 37±2.4 36±2.4 40±2.2
Surface tension (mN/m) Distillery waste 58±1.0 27±0.0 27±0.0 29±1.3 27±0.0
Curd Whey 56±1.3 27±0.0 27±0.0 27±0.0 27±0.0
Sugar industry effluent 62±5.7 39±0.8 37±0.8 38±0.8 35±0.8
Fruit processing waste 60±1.0 29±0.8 28±0.0 29±0.8 27±0.0
pH Distillery waste 7.0±0.0 8.7±0.0 8.7±0.0 8.9±0.0 8.9±0.0
Curd Whey 7.0±0.0 8.4±0.0 8.6±0.0 8.9±0.0 9.0±0.0
Sugar industry effluent 7.0±0.0 6.5±0.0 5.9±0.1 5.7±0.0 6.4±0.1
Fruit Processing waste 7.0±0.0 7.8±0.1 7.5±0.3 7.9±0.0 7.5±0.0
Biomass yield (c.f.u./ml) Distillery waste 12±1x102 57±4x108 38±2x108 55±3x107 66±4x108
Curd Whey 12±2x102 85±3x108 83±3x108 79±2x107 98±1x109
Sugar industry effluent 12±2x102 26±3x104 33±2x104 72±4x104 82±2x104
Fruit Processing waste 12±4x102 66±2x104 53±5x104 70±3x104 96±1x105
COD (mg/L) Distillery waste 30880
±24
18110
±33
20899
±25
24520
±41
20000
±39
Curd Whey 37250
±456
19320
±38
19340
±45
20091
±58
21008
±65
Sugar industry effluent 1052±2 678±5 549±2 556±4 659±5
Fruit Processing waste 2108±4 780±10 890±4 798±8 653±3
Biosurfactant yield (g/l) Distillery waste 0.001±
0.0002
0.648±
0.0017
0.575±
0.0014
0.696±
0.0051
1.421±
0.0037
Curd Whey 0.001±
0.0002
0.786±
0.0004
0.590±
0.0004
0.876±
0.0022
1.631±
0.0045
Sugar industry effluent 0.001±
0.0002
0.006±
0.0004
0.005±
0.0006
0.004±
0.0003
0.008±
0.0001
Fruit Processing waste 0.001±
0.0002
0.008±
0.0004
0.006±
0.0002
0.006±
0.0005
0.010±
0.0006
Mean + Standard deviation; n=4
Table 2: Variations in biosurfactant production potential and other related parameters of the new microbial isolates from distillery waste, and other industrial waste as fermentation medium (After 120 h of incubation).