Effective recovery of microalgal biomass using various types of emulsion polymers

Menghour Huy; Gopalakrishnan Kumar; Pooja Sharma; Ranjna Sirohi; Ashok Pandey; Sang Hyoun Kim

doi:10.1016/j.jbiotec.2022.08.010

Effective recovery of microalgal biomass using various types of emulsion polymers

Menghour Huy, Gopalakrishnan Kumar, Pooja Sharma, Ranjna Sirohi, Ashok Pandey, Sang Hyoun Kim

Department of Civil and Environmental Engineering

Research output: Contribution to journal › Review article › peer-review

1 Citation (Scopus)

Abstract

Microalgae biomass has been considered as one of the potential feedstocks in biofuel production. Yet, biomass harvesting poses a challenge to the overall production cost due to its low cell density. Flocculation has been marked as one of the promising processes in microalgae harvesting technology. In this study, the first screening of two anionic (A-230, and A-330E) and five cationic polymers (C-810E, C-810EL, C-810EB, C-810ELH, and C-810EMB) followed by gravity settling with the mixed microalgae concentration of 2.24 g_TSS/L revealed that anionic polymers are less effective. Whereas all cationic polymers achieved above 90% harvesting efficiency. Therefore, the maximum mass recovery of 98.7% with 86.8 g_TSS/L sediment content was achieved by adjusting pH to 6–0.6 mL/L (115.178 mg/g_biomass) of C-810E followed by 15-min settling. The cationic polymer addition followed by settling would enable cost-effective downstream processing of microalgal biomass.

Original language	English
Pages (from-to)	25-32
Number of pages	8
Journal	Journal of Biotechnology
Volume	358
DOIs	https://doi.org/10.1016/j.jbiotec.2022.08.010
Publication status	Published - 2022 Nov 10

Bibliographical note

Funding Information:
The research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science & ICT) (No. 2020R1A2B5B02001757 ).

Publisher Copyright:
© 2022 The Authors

All Science Journal Classification (ASJC) codes

Biotechnology
Bioengineering
Applied Microbiology and Biotechnology

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10.1016/j.jbiotec.2022.08.010

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title = "Effective recovery of microalgal biomass using various types of emulsion polymers",

abstract = "Microalgae biomass has been considered as one of the potential feedstocks in biofuel production. Yet, biomass harvesting poses a challenge to the overall production cost due to its low cell density. Flocculation has been marked as one of the promising processes in microalgae harvesting technology. In this study, the first screening of two anionic (A-230, and A-330E) and five cationic polymers (C-810E, C-810EL, C-810EB, C-810ELH, and C-810EMB) followed by gravity settling with the mixed microalgae concentration of 2.24 gTSS/L revealed that anionic polymers are less effective. Whereas all cationic polymers achieved above 90% harvesting efficiency. Therefore, the maximum mass recovery of 98.7% with 86.8 gTSS/L sediment content was achieved by adjusting pH to 6–0.6 mL/L (115.178 mg/gbiomass) of C-810E followed by 15-min settling. The cationic polymer addition followed by settling would enable cost-effective downstream processing of microalgal biomass.",

author = "Menghour Huy and Gopalakrishnan Kumar and Pooja Sharma and Ranjna Sirohi and Ashok Pandey and Kim, {Sang Hyoun}",

note = "Funding Information: The research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science & ICT) (No. 2020R1A2B5B02001757 ). Publisher Copyright: {\textcopyright} 2022 The Authors",

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AU - Huy, Menghour

AU - Kumar, Gopalakrishnan

AU - Sharma, Pooja

AU - Sirohi, Ranjna

AU - Pandey, Ashok

AU - Kim, Sang Hyoun

N1 - Funding Information: The research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science & ICT) (No. 2020R1A2B5B02001757 ). Publisher Copyright: © 2022 The Authors

PY - 2022/11/10

Y1 - 2022/11/10

N2 - Microalgae biomass has been considered as one of the potential feedstocks in biofuel production. Yet, biomass harvesting poses a challenge to the overall production cost due to its low cell density. Flocculation has been marked as one of the promising processes in microalgae harvesting technology. In this study, the first screening of two anionic (A-230, and A-330E) and five cationic polymers (C-810E, C-810EL, C-810EB, C-810ELH, and C-810EMB) followed by gravity settling with the mixed microalgae concentration of 2.24 gTSS/L revealed that anionic polymers are less effective. Whereas all cationic polymers achieved above 90% harvesting efficiency. Therefore, the maximum mass recovery of 98.7% with 86.8 gTSS/L sediment content was achieved by adjusting pH to 6–0.6 mL/L (115.178 mg/gbiomass) of C-810E followed by 15-min settling. The cationic polymer addition followed by settling would enable cost-effective downstream processing of microalgal biomass.

AB - Microalgae biomass has been considered as one of the potential feedstocks in biofuel production. Yet, biomass harvesting poses a challenge to the overall production cost due to its low cell density. Flocculation has been marked as one of the promising processes in microalgae harvesting technology. In this study, the first screening of two anionic (A-230, and A-330E) and five cationic polymers (C-810E, C-810EL, C-810EB, C-810ELH, and C-810EMB) followed by gravity settling with the mixed microalgae concentration of 2.24 gTSS/L revealed that anionic polymers are less effective. Whereas all cationic polymers achieved above 90% harvesting efficiency. Therefore, the maximum mass recovery of 98.7% with 86.8 gTSS/L sediment content was achieved by adjusting pH to 6–0.6 mL/L (115.178 mg/gbiomass) of C-810E followed by 15-min settling. The cationic polymer addition followed by settling would enable cost-effective downstream processing of microalgal biomass.

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Effective recovery of microalgal biomass using various types of emulsion polymers

Abstract

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