DOI QR코드

DOI QR Code

A Comparative Study on Microalgae Recovery Rates in Response to Different Low Cost Bio-flocculant Applications

저비용 응집제를 이용한 미세조류 응집 효율 비교

Choi, Hee-Jeong
최희정

  • Received : 2015.08.12
  • Accepted : 2015.10.01
  • Published : 2015.11.30

Abstract

In this study, low cost bio-flocculants, chitosan, cationic starch and Mg-sericite, were used as a flocculant to harvest freshwater microalgae, Chlorella vulgaris. Chitosan, cationic starch and Mg-sericite separated successfully >98% of C. vulgaris at following optimal parameters: 90 mg/L chitosan at pH 6-7, 70 mg/L cationic starch at pH 9-10 and 50 mg/L Mg-sericite at pH 4-5. A relatively high correlation coefficient (R2) of 0.9993 for chitosan, 0.9971 for catonic starch and 0.9924 for Mg-sericite was obtained. The investigated flocculants amount increased linearly with increasing the microalgae amount. The biopolymer, Mg-sericite, was more effective than that of other investigated flocculants. These results indicated that a bio-flocculants, chitosan, cationic starch and Mg-sericite, could prove to be an effective flocculant for economical production of microalgae biomass. In addition, Mg-sericite was more effective comparing to the other investigated flocculants.

Keywords

Cationic starch;Chitosan;Flocculation;Harvesting;Microalgae;Mg-sericite

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