Table 1.
Usual proximate content of citrus waste (% dry weight basis)
| Citrus waste | Moisture | Crude protein | Crude fibre | Crude fat | Crude ash | Pectin | Lignin | Cellulose | Hemicellulose | References |
|---|---|---|---|---|---|---|---|---|---|---|
| Citrus sinensis seeds | – | 3.1 | 5.5 | 52 | 2.5 | – | – | – | – | Akpata and Akubor (1999) |
| Citrus sinensis peels | 75.3 ± 10.2 | 10.2 ± 3.70 | 57.0 ± 10.0 | 2.22 ± 6.10 | 3.33 ± 0.50 | – | – | – | – | Chau and Huang (2003) |
| Citrus sinensis peels | – | 9.10 | – | 4.00 | 2.60 | 23.02 | 7.52 | 37.10 | 11.04 | Marin et al. (2007) |
| Citrus limon pulp | – | 8.72 | – | 4.00 | 2.54 | 22.53 | 7.55 | 36.22 | 11.05 | Marin et al. (2007) |
| Citrus unshiu peel | 3.30 | 34.0 | 4.30 | 25.10 | 10.20 | Kim et al. (2015) | ||||
| Citrus by-productsa | – | – | – | – | 4.80 | 15.30 | 1.95 | 8.82 | 7.96 | Satari et al. (2017) |
aMixture of peels, leaf and seeds of C. sinensis and C. paradise after extraction of juice