Table 1.
Cell properties and flocculation characteristics using calcium ions at pH ∼11.5.
| Strains | Cell wall and flagellar motility | Cell density (g/L) | Size (μm) | Starch content (%) | Lipid contents (%) | Optimized dosage (mM, CaCl2) | Flocculation efficiency (%) | Zeta potential (mV) |
|
|---|---|---|---|---|---|---|---|---|---|
| Before flocculation | After flocculation | ||||||||
| CC1690 | + | 0.78 ± 0.07 | 6.89 ± 0.25 | 32.5 ± 2.3 | 11.2 ± 1.9 | 5 | 94.8 ± 2.3 | –22.15 ± 1.69 | –5.67 ± 0.38 |
| CC124 | + | 0.74 ± 0.09 | 5.96 ± 0.37 | 39.2 ± 3.4 | 14.7 ± 2.3 | 5 | 92.9 ± 2.6 | –20.48 ± 2.31 | –6.43 ± 0.57 |
| sta6 | – | 0.63 ± 0.09 | 2.33 ± 0.18 | ND | 45.3 ± 2.6 | 10 | 93.7 ± 1.9 | –26.63 ± 2.04 | –4.92 ± 0.27 |
| CC400 | – | 0.68 ± 0.06 | 4.27 ± 0.24 | 29.4 ± 2.9 | 13.4 ± 2.7 | 10 | 94.4 ± 2.2 | –22.49 ± 2.18 | –3.73 ± 0.44 |
| sta6-C6 | – | 0.66 ± 0.07 | 3.57 ± 0.21 | 33.5 ± 1.9 | 16.2 ± 3.3 | 10 | 94.1 ± 1.7 | –25.43 ± 1.95 | –4.67 ± 0.51 |
+: intact cell wall and flagella-dependent motility; -: cell wall deficient and lacking flagella-dependent motility; ND, not detectable.