文献类型： 外文期刊
作者： Ma, Wei 1 ; Feng, Chenchen 3 ; Guan, Fachun 2 ; Ma, Dianrong 1 ; Cai, Jinling 3 ;
作者机构： 1.Shenyang Agr Univ, Rice Res Inst, Key Lab Northern Japon Super Rice Breeding, Minist Educ, Shenyang 110866, Peoples R China
2.Jilin Acad Agr Sci, Changchun 130033, Peoples R China
3.Tianjin Univ Sci & Technol, Coll Chem Engn & Mat Sci, Tianjin Key Lab Brine Chem Engn & Resource Eco Uti, Tianjin 300457, Peoples R China
关键词： microalgae; harvest; flocculation; biomass recovery; culture medium recycling
期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.9； 五年影响因子：2.9 ）
ISSN：
年卷期： 2023 年 11 卷 1 期
页码：
收录情况： SCI
摘要： Efficient microalgae harvesting is a great challenge hindering diverse industrial applications of microalgae. Flocculation is regarded as an effective and promising technology for microalgae harvesting. In this study, sulfate (Al-2(SO4)(3) and Fe-2(SO4)(3)) and chloride flocculants (AlCl3 and FeCl3) were used to harvest Chlorella vulgaris. Flocculation conditions, including flocculant dose, flocculation time, stirring speed, stirring time, and flocculation pH, were optimized, and flocculant effects on microalgal cell status, floc characteristics, biomass composition, algal cell re-culture, and media recycling were investigated. All flocculants exhibited efficient flocculation efficiency (93.5-98.8%) with lower doses of sulfate salts (60 mg/L algal culture) and higher doses of chloride salts (100 mg/L algal culture). The tested flocculants had no obvious influence on biomass composition (including lipids, carbohydrates, proteins, and carotenoids), and microalgal cells in flocs could efficiently regrow. The spent medium of all treatments was successfully recycled for subsequent cell growth, thus reducing dependency on fresh medium.
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