期刊
BIORESOURCE TECHNOLOGY
卷 247, 期 -, 页码 327-331出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.187
关键词
Microalgae; Moringa; Bioflotation; Nannochloropsis sp.; MPOE; Flotation efficiency
资金
- Universiti Malaysia Sabah, Malaysia [PRF0005]
- NRGS grant by Ministry of Higher Education - Malaysia [NRGS0002]
A new approach to recover microalgae from aqueous medium using a bio-flotation method is reported. The method involves utilizing a Moringa protein extract - oil emulsion (MPOE) for flotation removal of Nannochloropsis sp. The effect of various factors has been assessed using this method, including operating parameters such as pH, MPOE dose, algae concentration and mixing time. A maximum flotation efficiency of 86.5% was achieved without changing the pH condition of algal medium. Moreover, zeta potential analysis showed a marked difference in the zeta potential values when increase the MPOE dose concentration. An optimum condition of MPOE dosage of 50 ml/L, pH 8, mixing time 4 min, and a flotation efficiency of greater than 86% was accomplished. The morphology of algal flocs produced by protein-oil emulsion flocculant were characterized by microscopy. This flotation method is not only simple, but also an efficient method for harvesting microalgae from culture medium.
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