Comparison of various reported studies for the chemical flocculation-based harvesting of microalgal biomass with the present study.
| Microalgal species | Flocculation type | Flocculant used (grade) | Harvesting efficiency (%) | Volume of culture | Cost of harvesting kg of biomass−1 (USD) | References |
|---|---|---|---|---|---|---|
| Chlorella sp. FC2 | Chemical | FeSO4 (commercial) | 87.48 | 20 L | 0.17–0.3 | Present study |
| Chlorella sp. FC2 | Chemical | FeSO4 (commercial) | 94.33 | 5 L | 0.16–0.28 | Present study |
| Chlorella sp. FC2 | Chemical | FeSO4 (commercial) | 95.36 | 350 mL | 0.16–0.27 | Present study |
| Chlorella sp. FC2 | Chemical | FeSO4 (commercial) | 99.09 | 40 mL | 0.15–0.26 | Present study |
| Chlorella sp. FC2 | Chemical | FeSO4 (analytical) | 92.3 | 20 L | 18.33 | Present study |
| Chlorella vulgaris | Chemical | Nano-aminoclays (analytical) | 99 | 1 L | — | Farooq et al.34 |
| Chlorella sorokiniana | Chemical | Chitosan (analytical) | 99 | 50 mL | 0.2 | Xu et al.35 |
| Chlorella minutissima | Chemical | Fe2(SO4)3 (analytical) | 80 | 20 mL | — | Papazi et al.36 |
| Phaeodactylum tricornutum | Chemical | Polyaluminium chloride (analytical) | 67 | 2 L | 0.386 | Şirin et al.37 |
| Chlamydomonas reinhardtii | Chemical | Polyaluminium chloride (commercial) | 96.7 | 500 mL | 0.077 | Delrue et al.18 |
| Chlorella vulgaris | Chemical | Tanfloc SL (commercial) | 95 | 100 mL | NA | Roselet et al.19 |
| Chlorella vulgaris, Scenedesmus obliquus | Chemical | Ferric chloride (analytical) | 79–80 | 1 L | 1.6–2.2 | Koley et al.38 |