Table 2 Effect of various physicochemical parameters on extracellular β-glucosidase (β-GL) production (on dry mass basis) by Aspergillus sp. DHE7 in solid state fermentation (SSF)
Agro-industrial substrate | β-GL activity/(U/g) |
|---|---|
Jojoba meal | 116.4 ± 2.4 |
Rice husk | 13.8 ± 0.8 |
Rice straw | 15.1 ± 0.3 |
Sugar beet bulb | 32.9 ± 1.2 |
Sugarcane bagasse | 27.3 ± 1.9 |
Sunflower oil cake | 43.8 ± 1.4 |
Cotton seed waste | 78.5 ± 2.5 |
Olive oil cake | 23.1 ± 0.4 |
Rice bran | 33.2 ± 1.1 |
Wheat bran | 84.3 ± 4.4 |
Wheat germ | 54.6 ± 2.1 |
pH | |
4.0 | 44.3 ± 2.4 |
5.0 | 117.3 ± 4.1 |
6.0 | 126.4 ± 3.7 |
7.0 | 104.5 ± 3.6 |
8.0 | 86.5 ± 2.1 |
Moisture/% | |
33 | 56.2 ± 1.4 |
50 | 82.4 ± 2.6 |
60 | 125.7 ± 2.8 |
70 | 141.6 ± 4.6 |
75 | 124.5 ± 3.2 |
80 | 89.3 ± 2.8 |
85 | 77.5 ± 1.7 |
90 | 63.2 ± 2.3 |
Incubation/h | |
24 | 00.00 |
48 | 55.1 ± 1.5 |
72 | 152.8 ± 4.3 |
96 | 139.4 ± 2.6 |
120 | 119.7 ± 2.4 |
Temperature/C° | |
25 | 93.1 ± 2.3 |
30 | 151.2 ± 3.4 |
35 | 167.2 ± 5.1 |
40 | 112.6 ± 4.2 |
45 | 77.5 ± 3.7 |
Inoculum size/(spore/mL) | |
0.64 × 107 | 96.2 ± 3.1 |
1.27 × 107 | 163.5 ± 4.9 |
2.54 × 107 | 174.6 ± 5.8 |
3.81 × 107 | 143.2 ± 4.3 |
5.04 × 107 | 106.1 ± 2.8 |