Table 2 Efficiency comparison of several common flocculants for microalgal biomass harvesting
Flocculants | Optimal dosage, g/L | Species | Algal biomass concentration, g/L | Efficiency, % | References |
|---|---|---|---|---|---|
Chitosan | 0.25 | Chlorella vulgaris | 1.2 | 91.9 | This study |
Chitosan | 0.05 | Chlorella vulgaris | 0.5 | 92.3 | This study |
Cationic inulin | 0.06 | Botryococcus sp. | – | 88.6 | [34] |
Cationic cassia gum | 0.08 | Chlamydomonas sp. | 0.85 | 92 | [24] |
Cationic starch | 0.03 | Scenedesmus dimorphus | 0.12 | 91 | [19] |
Aluminum sulfate | 2.5 | Chlorella vulgaris | 1.2 | 92.4 | This study |
Aluminum sulfate | 0.8 | Scenedesmus spinosus | 0.4 | 99.1 | [18] |
Ferric sulfate | 1.5 | Scenedesmus spinosus | 0.4 | 61.6 | [18] |
Ferric chloride | 1.1 | Chlorococcum sp. | – | 92 | [21] |
Iron oxide | 0.3 | Chlorella ellipsoidea | 0.8 | 90 | [35] |
Yttrium iron oxide | 2.5 | Chlorella vulgaris | 0.82 | 93 | [36] |