Supplementation of micro-nutrients to growth media of microalgae-induced biomass and fatty acids composition for clean energy generation

Zhenni Su; Mohammed Jalalah; Saeed A Alsareii; Farid A Harraz; Abdulrhman A Almadiy; Lei Wang; Nandini Thakur; El-Sayed Salama

doi:10.1007/s11274-023-03815-w

Supplementation of micro-nutrients to growth media of microalgae-induced biomass and fatty acids composition for clean energy generation

World J Microbiol Biotechnol. 2023 Nov 13;40(1):12. doi: 10.1007/s11274-023-03815-w.

Authors

Zhenni Su¹, Mohammed Jalalah^{2

3}, Saeed A Alsareii^{4

5}, Farid A Harraz^{4

6}, Abdulrhman A Almadiy⁷, Lei Wang¹, Nandini Thakur¹, El-Sayed Salama⁸

Affiliations

¹ Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou, 730000, Gansu Province, People's Republic of China.
² Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia. jalalah@gmail.com.
³ Department of Electrical Engineering, College of Engineering, Najran University, Najran, 11001, Saudi Arabia. jalalah@gmail.com.
⁴ Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia.
⁵ Department of Surgery, College of Medicine, Najran University, Najran, 11001, Saudi Arabia.
⁶ Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Sharurah, 68342, Saudi Arabia.
⁷ Department of Biology, Faculty of Arts and Sciences, Najran University, Najran, 1988, Saudi Arabia.
⁸ Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou, 730000, Gansu Province, People's Republic of China. salama@lzu.edu.cn.

PMID: 37953333
DOI: 10.1007/s11274-023-03815-w

Abstract

The presence of harmful heavy metals (HMs) in the aquatic environment can damage the environment and threaten human health. Traditional remediation techniques can have secondary impacts. Thus, more sustainable approaches must be developed. Microalgae have biological properties (such as high photosynthetic efficiency and growth), which are of great advantage in the HMs removal. In this study, the effect of various concentrations (2×, 4×, and 6×) of copper (Cu), cobalt (Co), and zinc (Zn) on microalgae (C. sorokiniana GEEL-01, P. kessleri GEEL-02, D. asymmetricus GEEL-05) was investigated. The microalgal growth kinetics, HMs removal, total nitrogen (TN), total phosphor (TP), and fatty acids (FAs) compositions were analyzed. The highest growth of 1.474 OD_680nm and 1.348 OD_680nm was obtained at 2× and 4×, respectively, for P. kessleri GEEL-02. P. kessleri GEEL-02 showed high removal efficiency of Cu, Co, and Zn (38.92-55.44%), (36.27-68.38%), and (32.94-51.71%), respectively. Fatty acids (FAs) analysis showed that saturated FAs in C. sorokiniana GEEL-01 and P. kessleri GEEL-02 increased at 2× and 4× concentrations while decreasing at 6×. For P. kessleri GEEL-02, the properties of biodiesel including the degree of unsaturation (UD) and cetane value (CN) increased at 2×, 4×, and 6× as compared to the control. Thus, this study demonstrated that the three microalgae (particularly P. kessleri GEEL-02) are more suitable for nutrient and HMs removal coupled with biomass/biodiesel production.

Keywords: Biodiesel; Fatty acids; Heavy metals; Microalgae; Nutrients removal.

MeSH terms

Biofuels
Biomass
Dietary Supplements / analysis
Fatty Acids / analysis
Humans
Metals, Heavy*
Microalgae*
Nutrients / analysis

Substances

Fatty Acids
Biofuels
Metals, Heavy

Abstract

MeSH terms

Substances

Grants and funding