Harvesting Efficiency of Chlorella sp. TISTR8263 Biomass by Magnetic Particles Synthesized from Co-Precipitation and Microwave Assisted Synthesis

Authors

  • Kanthida Jangyubol Department of Biotechnology, Faculty of Science and Technology, Thammasat University
  • Supenya Chittapun Department of Biotechnology, Faculty of Science and Technology, Thammasat University

Abstract

Harvesting efficiencies of Chlorella sp. TISTR8263 biomass by magnetic particles synthesized from     co-precipitation (Magnetic nanoparticles: MNPs) and microwave assisted synthesis (Iron oxide magnetic microparticles: IOMMs) were compared. A dose of 200 - 800 mg/L MNPs and IOMMs were used as agents to separate 1g/L Chlorella sp. TISTR8263 cells from BG-11 medium at pH 9.1 ± 0.5. Most of MNPs particles were smaller in size than IOMMs. Size distribution analysis showed that 41.17% of MNPs particles ranged from             > 5.0-10.0 mm, whereas 34.83% of IOMMs ranged from > 10.0-20.0 mm. In addition, MNPs showed a significantly higher efficiency in algal cell harvesting than IOMMs (p=0.023). Doses of used agents significantly effected on effectiveness of cell separation (p<0.001). There was a significantly interaction between used doses and magnetic particle products (p<0.001). At 800 mg/L, MNPs showed higher harvesting efficiency (95.30 ± 0.44 % or 1.906 ± 0.009 g algae/ g MNPs) than IOMMs (91.55 ± 0.39 % or (1.831 ± 0.008 g algae/ g IOMMs)). The results indicated that MNPs synthesized by co-precipitation exhibited higher efficiency in algal cell harvesting than IOMMs created from microwave assisted synthesis. Therefore, MNPs was selected as a core agent to further develop a new composite for harvesting algal cells.                                Keywords:  magnetic particles, magnetic synthesis, harvesting efficiency, microalgae

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Published

2018-02-08