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Self-flocculating Spirulina platensis CMB-02 to efficiently treat ammonia nitrogen of rare earth elements wastewater.

Authors :
Che D
Lai Y
Weng Z
Li M
Huang G
Zheng M
Wang M
Source :
Bioresource technology [Bioresour Technol] 2024 Nov; Vol. 411, pp. 131360. Date of Electronic Publication: 2024 Aug 26.
Publication Year :
2024

Abstract

The study aimed to evaluate the cyanobacteria Spirulina platensis CMB-02 (S. platensis CMB-02) with self-flocculation properties to treat the ammonia nitrogen of rare earth elements (REEs) wastewater. The results demonstrated that S. platensis CMB-02 could effectively remove total ammonia nitrogen (TAN) and total inorganic nitrogen within 5 days. Simultaneously, a self-flocculation efficiency of 82.59 % was achieved by microalga in 30 min after wastewater treatment. The pH, tightly bound extracellular polymeric substances (TB-EPS), and cell morphology of S. platensis CMB-02 were identified as key factors influencing its self-flocculation capabilities. Moreover, the established semi-continuous process with a 20 % renewal rate showed a stable treatment effect, representing a TAN degradation rate of 10.9 mg/(L·d). These obtained findings could conclude that the developed approach mediated with self-flocculating S. platensis CMB-02 was a promising way for REEs wastewater treatment.<br />Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2024. Published by Elsevier Ltd.)

Details

Language :
English
ISSN :
1873-2976
Volume :
411
Database :
MEDLINE
Journal :
Bioresource technology
Publication Type :
Academic Journal
Accession number :
39197660
Full Text :
https://doi.org/10.1016/j.biortech.2024.131360