Investigation of Cyanobacterium Planktothrix spiroides (Wang & Li 2013) Biomass Recovery Method and Evaluation of IAA Biosynthesis Ability
Vol. 134 No. 3A (2025), Original Article
Vol. 134 No. 3A (2025)

Investigation of Cyanobacterium Planktothrix spiroides (Wang & Li 2013) Biomass Recovery Method and Evaluation of IAA Biosynthesis Ability

Original Article
https://doi.org/10.26459/hueunijard.v134i3A.7621
Published 2025-03-13
Nguyen Thi Thu Lien
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Luong Quang Doc
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Phan Thi Thuy Hang
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Duong Thi Thuy
Institute of Energy Science and Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
Hoang Thi Quynh
Institute of Energy Science and Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
Nguyen Thi Anh Nguyet
Institute of Energy Science and Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
Dang Thi Mai Anh
Institute of Energy Science and Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
Vu Thi Nguyet
Institute of Energy Science and Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
PDF (Vietnamese)

Keywords

chitosan
Plantothrix spiroides
kết bông sinh khối
thu hồi sinh khối chitosan
Planktothrix spiroides
biomass flocculation
biomass recovery

Abstract

This study investigates methods for recovering the cyanobacterium Planktothrix spiroides (PHO) biomass, a potential source for biofertilizer production due to its ability to biosynthesize IAA. Various flocculation methods were tested, including pH adjustment and the use of FeCl₃ and chitosan. The results indicate that pH 8 is the optimal condition for flocculating PHO biomass, achieving an efficiency of 83% after 1 hour. Using FeCl₃ at a concentration of 200 mg/L resulted in a 95% biomass recovery within 15 minutes. The use of chitosan—a natural and environmentally friendly flocculant—also yielded high efficiency, with 93.33% of biomass recovered after 10 minutes at a stirring speed of 40 rpm and a chitosan concentration of 25 mg/L. The chitosan-based method not only ensures high flocculation efficiency but also minimizes the loss of IAA content in the culture medium as well as in the PHO biomass. The loss rate is estimated to be less than 1% in the culture medium and 6% in the biomass.

https://doi.org/10.26459/hueunijard.v134i3A.7621
PDF (Vietnamese)

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