Effective harvesting of microalgae by coagulation-flotation
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This study developed a coagulation–flotation process for microalgae Chlorella sp. XJ-445 harvesting, which was composed of algal surface modification by combined use of Al 3+ and cetyltrimethylammonium bromide (CTAB) and followed dispersed bubble flotation. Dissolved organic matter (DOM) in the medium was firstly characterized and mainly consisted of hydrophilic low molecular weight molecules. The dosage of collector (CTAB) and coagulant (Al 3+ ) were optimized, and with the pretreatment of 40 mg Al 3+ and 60 mg CTAB per 1 g dry biomass without pH adjustment, a maximum flotation recovery efficiency of 98.73% can be achieved with the presence of DOM. Algal cells characterization results showed that the combined use of CTAB and Al 3+ largely enhanced the algal floc size, and exhibited higher degree of hydrophobicity, which favoured the flotation, and can be interpreted by DLVO (Derjaguin, Landau, Verwey and Overbeek) modelling. A benefit in fatty acid conversion was further found with the optimized coagulation–flotation process. It was suggested that this coagulation based flotation is a promising strategy for high-efficiency harvesting of microalgae.
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Enhanced flotation recovery of >98% has been reported using Al3+ as a coagulant combined with CTAB.
“Enhanced flotation recovery of >98% has recently been reported by the combined use of Al 3+ as a coagulant combined with cetyltrimethylammonium bromide (CTAB) [54].”
From Key Targets for Improving Algal Biofuel Production (2021) · cites this paper as [54]
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Key Targets for Improving Algal Biofuel Production
Griffiths, G., Hossain, A. K., Sharma, V., & Duraisamy, G. (2021) · Clean Technologies · doi:10.3390/cleantechnol3040043 · Cited by 49 · see citing works
- Authors
- Xia, L., Li, Y., Huang, R., & Song, S.
- Affiliations
- Wuhan University of Technology (CN)
- Autonomous University of San Luis Potosí (MX)
- Corresponding author
- Song, Shaoxian
- Venue
- Royal Society Open Science
- Publisher
- The Royal Society
- Published
- 2017-11
- Volume
- 4
- Issue
- 11
- Pages
- 170867
- ISSN
- 2054-5703 (ISSN-L)
- PMC
- PMC5717653
- OpenAlex
- W2768245092
- Cited by
- 53
- References
- 40
- Citations by year
- 2026: 1 · 2025: 6 · 2024: 8 · 2023: 8 · 2022: 10 · 2021: 9 · 2020: 2 · 2019: 7 · 2018: 2
- FWCI
- 0.81
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Royal Society Open Science (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- the National Natural Science foundation of China (51604207)
- Independent Innovation Foundation of Wuhan University of Technology (173208001)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Environmental Science › Water Science and Technology › Minerals Flotation and Separation Techniques
- Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Keywords
- microalgae harvesting, coagulation flotation, Chlorella, cetyltrimethylammonium bromide, aluminum coagulants, dissolved organic matter, floc size, DLVO theory, fatty acid conversion, microalgal biomass
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