Harvesting Marine Microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) Technique

The production of high-value bioproducts from microalgae biomass has been widely investigated. However, their is hindered by the expensive harvesting process. To date, flocculation followed DAF process accepted as one affordable approaches. In this study, use technique was attempted to harvest marine Nannochloropsis sp. Batch carried out using fabricated unit equipped with several compartments including separation column, product collecting vessel and rotary skimmer. Tannin-based biopolymer flocculant, AFlok-BP1 at pH 5 a concentration 160 mg/L used facilitate particles. effects different saturator pressure 1.8, 2, 2.2 bar were then evaluated constant volume 6 L culture. culture volumes (6, 8 10 L) also fixed bar. highest yielded best result total solid 3.19 ± 0.01% maximum yield 1.70 0.05 g/g (wet basis). lowest (0.027 g/L) when used. values significantly higher increased approximately 0.035 0.050 g/L, respectively. As conclusion, study provided evidence for feasibility in