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Harvesting microalgal biomass using magnesium coagulation-dissolved air flotation
Zhang, Xuezhi1; Wang, Lan1; Sommerfeld, Milton2; Hu, Qiang1
2016-10-01
Source PublicationBIOMASS & BIOENERGY
ISSN0961-9534
Volume93Pages:43-49
AbstractCoagulation with magnesium was found to be more effective for harvesting microalgae Chlorella zofin-giensis with dissolved air flotation (DAF) than the use of Fe3+, Al3+ or chitosan, and the required coagulant dosage was in the order Mg2+ < chitosan < Al3+ < Fe3+. The Mg2+ dosage required depended on the growth phases and culture medium characteristics. An early exponential culture required the highest Mg2+ dosage (226 mg g(-1)), while a late stationary culture required the lowest dosage (36 mg g(-1)). HPO42- and CO32- in the culture medium competed with the microalgal cells for Mg2+ and increased the Mg2+ dosage necessary. No Mg2+ addition was required to harvest the freshwater microalgae Scenedesmus dimorphus grown in a pond with tap water with a high Mg2+ concentration or the marine microalgae Nannochloropsis sp. The critical coagulation pH ranged between 10.8 and 11.8, with a lower pH requirement at a higher Mg2+ concentration. Magnesium hydroxide precipitated with the harvested biomass; however, over 99.5% of the precipitated Mg2+ was recovered by washing the biomass with 0.1 M HCl. Microalgal harvesting with Mg2+ did not introduce extrinsic coagulant; thus, neither the biomass nor the medium was contaminated. (C) 2016 Published by Elsevier Ltd.
SubtypeArticle
KeywordMicroalgal Harvesting Flotation Medium Recycling Coagulant Recovery Biomass Purification
DOI10.1016/j.biombioe.2016.06.024
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Technology
Indexed BySCI
Funding OrganizationState Development & Investment Corporation in China(Y341151Z09) ; State Development & Investment Corporation in China(Y341151Z09) ; Chinese Academy of Sciences(Y62305-1-Z01) ; Chinese Academy of Sciences(Y62305-1-Z01) ; State Development & Investment Corporation in China(Y341151Z09) ; State Development & Investment Corporation in China(Y341151Z09) ; Chinese Academy of Sciences(Y62305-1-Z01) ; Chinese Academy of Sciences(Y62305-1-Z01)
Language英语
WOS Research AreaAgriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS SubjectAgricultural Engineering ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS KeywordCHLORELLA-VULGARIS ; INDUCED FLOCCULATION ; ORGANIC-MATTER ; WASTE-WATER ; PH ; ALGAE ; SEDIMENTATION ; BIODIESEL ; OPTIONS ; REUSE
WOS IDWOS:000382541000007
Funding OrganizationState Development & Investment Corporation in China(Y341151Z09) ; State Development & Investment Corporation in China(Y341151Z09) ; Chinese Academy of Sciences(Y62305-1-Z01) ; Chinese Academy of Sciences(Y62305-1-Z01) ; State Development & Investment Corporation in China(Y341151Z09) ; State Development & Investment Corporation in China(Y341151Z09) ; Chinese Academy of Sciences(Y62305-1-Z01) ; Chinese Academy of Sciences(Y62305-1-Z01)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/28339
Collection藻类生物技术和生物能源研发中心
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
2.Arizona State Univ, Arizona Ctr Algae Technol & Innovat, Polytech Campus, Mesa, AZ 85212 USA
Recommended Citation
GB/T 7714
Zhang, Xuezhi,Wang, Lan,Sommerfeld, Milton,et al. Harvesting microalgal biomass using magnesium coagulation-dissolved air flotation[J]. BIOMASS & BIOENERGY,2016,93:43-49.
APA Zhang, Xuezhi,Wang, Lan,Sommerfeld, Milton,&Hu, Qiang.(2016).Harvesting microalgal biomass using magnesium coagulation-dissolved air flotation.BIOMASS & BIOENERGY,93,43-49.
MLA Zhang, Xuezhi,et al."Harvesting microalgal biomass using magnesium coagulation-dissolved air flotation".BIOMASS & BIOENERGY 93(2016):43-49.
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