标题：Using magnetic materials to harvest microalgal biomass: evaluation of harvesting and detachment efficiency

作者：Zhu, LD (Zhu, L. -D.); Hiltunen, E (Hiltunen, Erkki); Li, ZH (Li, Zhaohua)

来源出版物：ENVIRONMENTAL TECHNOLOGY卷：40期：8页码：1006-1012 DOI：10.1080/09593330.2017.1415379出版年：APR 3 2019

摘要：Using naked iron oxide (Fe3O4) and yttrium iron oxide (Y3Fe5O12) nanoparticles as flocculants, the harvesting efficiency of Chlorella vulgaris biomass was investigated. The harvesting process includes two steps, which are the separation of microalgae from the culture solution with the magnetic nanoparticles and then the separation of the algae from the magnetic nanoparticles. The optimal dosages and pH values for the magnetic harvesting of microalgal biomass were determined. Results showed that Y3Fe5O12 nanoparticles were more efficient in microalgal biomass harvesting than Fe3O4 nanoparticles. In an effort to achieve more than 90% of harvesting efficiency, optimal dosages for Fe3O4 and Y3Fe5O12 to harvest microalgal biomass were 10 and 2.5 g/L, while the appropriate pH values were 6.2 and 7.3, respectively. The harvesting efficiency of Fe3O4 and Y3Fe5O12 nanoparticles increased as the pH value decreased. The experimental results also showed that under a higher pH value Fe3O4 nanoparticles were much easier to be separated from the flocs than Y3Fe5O12. 62.9% of Fe3O4 nanoparticles could be de-attached from the aggregates, when the floc pH value reached 12.3.

入藏号：WOS:000458158000007

文献类型：Article

语种：English

作者关键词：Microalgae; Chlorella vulgaris; magnetic materials; biomass production; magnetophoretic harvesting

通讯作者地址：Zhu, LD (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, 129 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
Zhu, LD (通讯作者)，Univ Vaasa, Fac Technol, POB 700, FI-65101 Vaasa, Finland.
Zhu, LD (通讯作者)，Univ Vaasa, Vaasa Energy Inst, POB 700, FI-65101 Vaasa, Finland.
Li, ZH (通讯作者)，Hubei Univ, Hubei Collaborat Innovat Ctr Green Transformat Bi, Wuhan 430062, Hubei, Peoples R China.
Li, ZH (通讯作者)，Hubei Univ, Fac Resources & Environm Sci, Wuhan 430062, Hubei, Peoples R China.

电子邮件地址：liandongzhu@gmail.com; zli@hubu.edu.cn

地址：[Zhu, L. -D.] Wuhan Univ, Sch Resource & Environm Sci, 129 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
[Zhu, L. -D.; Hiltunen, Erkki] Univ Vaasa, Fac Technol, POB 700, FI-65101 Vaasa, Finland.
[Zhu, L. -D.; Hiltunen, Erkki] Univ Vaasa, Vaasa Energy Inst, POB 700, FI-65101 Vaasa, Finland.
[Li, Zhaohua] Hubei Univ, Hubei Collaborat Innovat Ctr Green Transformat Bi, Wuhan 430062, Hubei, Peoples R China.
[Li, Zhaohua] Hubei Univ, Fac Resources & Environm Sci, Wuhan 430062, Hubei, Peoples R China.

影响因子：1.666