Table 1.
Properties of the chitins obtained by deproteinization with crude proteases, commercial protease, alkali and by acidic methods
| Percentage (%) | Raw BTSHW | Chitin 1 (cocktail protease) | Chitin 2 (commercial protease) | Chitin3 (acid treatment) | Chitin 4 (alkali treatment) |
|---|---|---|---|---|---|
| Moisture | 65.06 ± 0.35 | 4.05 ± 0.05 | 4.58 ± 0.34 | 5.70 ± 0.35 | 3.51 ± 0.37 |
| Ash | 30.66 ± 0.35 | 0.83 ± 0.06 | 1.18 ± 0.34 | 3.68 ± 0.53 | 1.06 ± 0.02 |
| Chitin | 34.23 ± 0.25 | 26.43 ± 0.44 | 21.21 ± 0.21 | 10.19 ± 0.17 | 27.28 ± 0.27 |
| Protein | 48.16 ± 0.20 | 20.07 ± 0.07 | 26.69 ± 0.17 | 38.11 ± 0.12 | 8.29 ± 0.27 |
| Lipid | 5.2 ± 0.20 | – | – | – | – |
| Appearance | – | White flakes | Slight yellowish flakes | Yellowish flakes | Yellowish flakes |
| Chitin recovery (%) | – | 77.23 ± 0.21 | 62.06 ± 0.12 | 29.93 ± 0.05 | 79.83 ± 0.17 |