TY - JOUR
T1 - Microwave assisted flocculation for harvesting of Chlorella vulgaris
AU - Liu, Wei
AU - Cui, Yunqian
AU - Cheng, Pengfei
AU - Huo, Shuhao
AU - Ma, Xiaochen
AU - Chen, Qingfeng
AU - Cobb, Kirk
AU - Chen, Paul
AU - Ma, Junjian
AU - Gao, Xinguo
AU - Ruan, Roger
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10
Y1 - 2020/10
N2 - Microalgae harvesting is a major hindrance for the development of the microalgae industry. In this paper, short microwave treatment was used to assist the flocculation of Chlorella vulgaris with three flocculants, Fe3+ (FeCl3), chitosan, and Ca2+ (CaCl2). A microwave irradiation time of 20 s, and a pH of 10 was found to be the optimum condition. The harvesting efficiency could be significantly increased by 43.2%, 49.5% and 39.6%, respectively for Fe3+, chitosan, and Ca2+ assisted by microwave under these conditions. Microwave treatment did not cause any damage to the algal cells, and had no obvious influence on the lipid extraction. Microwave treatment decreased the concentration of the flocculants in culture medium after flocculation; this treatment enabled the reuse of the supernatant. This study provides a new and promising method of improving the flocculation efficiency for microalgae harvesting, by using microwave energy.
AB - Microalgae harvesting is a major hindrance for the development of the microalgae industry. In this paper, short microwave treatment was used to assist the flocculation of Chlorella vulgaris with three flocculants, Fe3+ (FeCl3), chitosan, and Ca2+ (CaCl2). A microwave irradiation time of 20 s, and a pH of 10 was found to be the optimum condition. The harvesting efficiency could be significantly increased by 43.2%, 49.5% and 39.6%, respectively for Fe3+, chitosan, and Ca2+ assisted by microwave under these conditions. Microwave treatment did not cause any damage to the algal cells, and had no obvious influence on the lipid extraction. Microwave treatment decreased the concentration of the flocculants in culture medium after flocculation; this treatment enabled the reuse of the supernatant. This study provides a new and promising method of improving the flocculation efficiency for microalgae harvesting, by using microwave energy.
KW - Chlorella vulgaris
KW - Flocculation
KW - Harvesting efficiency
KW - Microwave
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U2 - 10.1016/j.biortech.2020.123770
DO - 10.1016/j.biortech.2020.123770
M3 - Article
C2 - 32652448
AN - SCOPUS:85087489687
SN - 0960-8524
VL - 314
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 123770
ER -