Freshwater microalgae-based wastewater treatment under abiotic stress
Wastewater treatment by microalgae is an eco-friendly and sustainable method for pollutant removal and biomass generation. Microalgae production under abiotic stress (such as salinity/salt stress) has an impact on nutrient removal and fatty acid accumulation. In this study, a freshwater microalgal s...
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AIMS Press
2023-09-01
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| Series: | AIMS Environmental Science |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/environsci.2023028?viewType=HTML |
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| author | Adel I. Alalawy Yang Yang Fahad M. Almutairi Haddad A. El Rabey Mohammed A. Al-Duais Abdelfatah Abomohra El-Sayed Salama |
| author_facet | Adel I. Alalawy Yang Yang Fahad M. Almutairi Haddad A. El Rabey Mohammed A. Al-Duais Abdelfatah Abomohra El-Sayed Salama |
| author_sort | Adel I. Alalawy |
| collection | DOAJ |
| description | Wastewater treatment by microalgae is an eco-friendly and sustainable method for pollutant removal and biomass generation. Microalgae production under abiotic stress (such as salinity/salt stress) has an impact on nutrient removal and fatty acid accumulation. In this study, a freshwater microalgal strain (Desmodesmus communis GEEL-12) was cultured in municipal wastewater with various NaCl concentrations (ranging from 25–150 mM). The growth kinetics and morphological changes of the microalgae were observed. The nutrient removal, salinity change, fatty acid composition, and biodiesel quality under various groups were also investigated. The maximum growth of D. communis GEEL-12 was observed in the control group at 0.48 OD680nm. The growth inhibition was observed under high salt conditions (150 mM), which showed poor tolerance with 0.15 OD680nm. The nitrogen (N) and phosphorus (P) removal significantly decreased from 99–81% and 5.0–5.9% upon the addition of 100–150 mM salt, respectively. Palmitic acid (C16:0) and stearic acid (C18:0) were the most common fatty acid profiles. The abundance of C18:0 enhanced from 49.37%–56.87% in D. communis GEEL-12 upon high NaCl concentrations (100–150 mM). The biodiesel quality index of D. communis GEEL-12 under 50–75 mM salt concentrations reached the levels advised by international standards. |
| first_indexed | 2024-03-08T17:09:05Z |
| format | Article |
| id | doaj.art-a6f94ba06ba940978f02a69e9eec7e3d |
| institution | Directory Open Access Journal |
| issn | 2372-0352 |
| language | English |
| last_indexed | 2024-03-08T17:09:05Z |
| publishDate | 2023-09-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Environmental Science |
| spelling | doaj.art-a6f94ba06ba940978f02a69e9eec7e3d2024-01-04T02:31:59ZengAIMS PressAIMS Environmental Science2372-03522023-09-0110450451510.3934/environsci.2023028Freshwater microalgae-based wastewater treatment under abiotic stressAdel I. Alalawy 0Yang Yang1Fahad M. Almutairi2Haddad A. El Rabey3Mohammed A. Al-Duais4Abdelfatah Abomohra5El-Sayed Salama 61. Department of Biochemistry, Faculty of Science, University of Tabuk, Kingdom of Saudi Arabia2. Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu Province, PR China1. Department of Biochemistry, Faculty of Science, University of Tabuk, Kingdom of Saudi Arabia1. Department of Biochemistry, Faculty of Science, University of Tabuk, Kingdom of Saudi Arabia1. Department of Biochemistry, Faculty of Science, University of Tabuk, Kingdom of Saudi Arabia3. Aquatic Ecophysiology and Phycology, Institute of Plant Science and Microbiology, University of Hamburg, 22609 Hamburg, Germany2. Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu Province, PR ChinaWastewater treatment by microalgae is an eco-friendly and sustainable method for pollutant removal and biomass generation. Microalgae production under abiotic stress (such as salinity/salt stress) has an impact on nutrient removal and fatty acid accumulation. In this study, a freshwater microalgal strain (Desmodesmus communis GEEL-12) was cultured in municipal wastewater with various NaCl concentrations (ranging from 25–150 mM). The growth kinetics and morphological changes of the microalgae were observed. The nutrient removal, salinity change, fatty acid composition, and biodiesel quality under various groups were also investigated. The maximum growth of D. communis GEEL-12 was observed in the control group at 0.48 OD680nm. The growth inhibition was observed under high salt conditions (150 mM), which showed poor tolerance with 0.15 OD680nm. The nitrogen (N) and phosphorus (P) removal significantly decreased from 99–81% and 5.0–5.9% upon the addition of 100–150 mM salt, respectively. Palmitic acid (C16:0) and stearic acid (C18:0) were the most common fatty acid profiles. The abundance of C18:0 enhanced from 49.37%–56.87% in D. communis GEEL-12 upon high NaCl concentrations (100–150 mM). The biodiesel quality index of D. communis GEEL-12 under 50–75 mM salt concentrations reached the levels advised by international standards.https://www.aimspress.com/article/doi/10.3934/environsci.2023028?viewType=HTMLmicroalgaesalinitywastewater treatmentnutrient removalbiodiesel |
| spellingShingle | Adel I. Alalawy Yang Yang Fahad M. Almutairi Haddad A. El Rabey Mohammed A. Al-Duais Abdelfatah Abomohra El-Sayed Salama Freshwater microalgae-based wastewater treatment under abiotic stress AIMS Environmental Science microalgae salinity wastewater treatment nutrient removal biodiesel |
| title | Freshwater microalgae-based wastewater treatment under abiotic stress |
| title_full | Freshwater microalgae-based wastewater treatment under abiotic stress |
| title_fullStr | Freshwater microalgae-based wastewater treatment under abiotic stress |
| title_full_unstemmed | Freshwater microalgae-based wastewater treatment under abiotic stress |
| title_short | Freshwater microalgae-based wastewater treatment under abiotic stress |
| title_sort | freshwater microalgae based wastewater treatment under abiotic stress |
| topic | microalgae salinity wastewater treatment nutrient removal biodiesel |
| url | https://www.aimspress.com/article/doi/10.3934/environsci.2023028?viewType=HTML |
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