The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae
<strong>BACKGROUND AND OBJECTIVES: </strong>Bioenergy is a phenomenon that has attracted humans’ attention for about a century. The desirable biological properties of <em>chlorella sp.</em>microalgae have turned it to one of the most ideal options for the production of biodie...
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2021-01-01
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| Series: | Global Journal of Environmental Science and Management |
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| author | H. Nouri J. Mohammadi Roushandeh A. Hallajisani A. Golzary S. Daliry |
| author_facet | H. Nouri J. Mohammadi Roushandeh A. Hallajisani A. Golzary S. Daliry |
| author_sort | H. Nouri |
| collection | DOAJ |
| description | <strong>BACKGROUND AND OBJECTIVES: </strong>Bioenergy is a phenomenon that has attracted humans’ attention for about a century. The desirable biological properties of <em>chlorella sp.</em>microalgae have turned it to one of the most ideal options for the production of biodiesel. However, the economic issues must be taken into account in its industrial scale production. The present study aims to investigate <em>chlorella sp.</em> biomass production and growth conditions by studying the influence of glucose concentration as a carbon source, nitrate concentration as a nitrogen source and pH, as three of the most important factors.<br /> <strong>METHODS: </strong>For this purpose, design of experiment was done by response surface methodology and each factor was investigated simultaneously under glucose concentration in 2-20 g/L, nitrate concentration in 0-1 g/L and 6FINDINGS: The results indicated that carbon concentration has maximum effect on growth and biomass production. The best results were obtained in glucose concentration of 2.6-6 g/L, nitrate concentration of 0.2-0.5 g/L and pH values 7-9. Moreover, the maximum biomass production (1.31 g/L), the highest specific growth rate (0.167 1/day), and the highest biomass productivity (0.085 g/L/Day) were obtained in the following conditions: glucose concentration of 2.6 g/L, nitrate concentration of 0.5 g/L, and pH = 8. The optimal C/N ratio was determined and significant correlation was observed between pH and growth rate change.<br /> <strong>CONCLUSION: </strong>It was concluded that <em>Chlorella sp < /em>., if properly adjusted for both chemical and physical parameters could be a valuable source of biomass for biodiesel production in industrial scale.</em> |
| format | Article |
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| institution | Kabale University |
| issn | 2383-3572 2383-3866 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | GJESM Publisher |
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| series | Global Journal of Environmental Science and Management |
| spelling | doaj-art-c99f6bad07f04c0889ffaaa04e8bba442025-02-02T12:26:04ZengGJESM PublisherGlobal Journal of Environmental Science and Management2383-35722383-38662021-01-017110311610.22034/gjesm.2021.01.0844603The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. MicroalgaeH. Nouri0J. Mohammadi Roushandeh1A. Hallajisani2A. Golzary3S. Daliry4Caspian Faculty of Engineering, College of Engineering, University of Tehran, Rezvanshar, Guilan, IranCaspian Faculty of Engineering, College of Engineering, University of Tehran, Rezvanshar, Guilan, IranCaspian Faculty of Engineering, College of Engineering, University of Tehran, Rezvanshar, Guilan, IranSchool of Environment, College of Engineering, University of Tehran, Tehran, IranCaspian Faculty of Engineering, College of Engineering, University of Tehran, Rezvanshar, Guilan, Iran<strong>BACKGROUND AND OBJECTIVES: </strong>Bioenergy is a phenomenon that has attracted humans’ attention for about a century. The desirable biological properties of <em>chlorella sp.</em>microalgae have turned it to one of the most ideal options for the production of biodiesel. However, the economic issues must be taken into account in its industrial scale production. The present study aims to investigate <em>chlorella sp.</em> biomass production and growth conditions by studying the influence of glucose concentration as a carbon source, nitrate concentration as a nitrogen source and pH, as three of the most important factors.<br /> <strong>METHODS: </strong>For this purpose, design of experiment was done by response surface methodology and each factor was investigated simultaneously under glucose concentration in 2-20 g/L, nitrate concentration in 0-1 g/L and 6FINDINGS: The results indicated that carbon concentration has maximum effect on growth and biomass production. The best results were obtained in glucose concentration of 2.6-6 g/L, nitrate concentration of 0.2-0.5 g/L and pH values 7-9. Moreover, the maximum biomass production (1.31 g/L), the highest specific growth rate (0.167 1/day), and the highest biomass productivity (0.085 g/L/Day) were obtained in the following conditions: glucose concentration of 2.6 g/L, nitrate concentration of 0.5 g/L, and pH = 8. The optimal C/N ratio was determined and significant correlation was observed between pH and growth rate change.<br /> <strong>CONCLUSION: </strong>It was concluded that <em>Chlorella sp < /em>., if properly adjusted for both chemical and physical parameters could be a valuable source of biomass for biodiesel production in industrial scale.</em>https://www.gjesm.net/article_44603_01c96b7e51d18cc74e1fc014f25f20dc.pdfchlorella spbiomass productivitygrowth rateenvironment |
| spellingShingle | H. Nouri J. Mohammadi Roushandeh A. Hallajisani A. Golzary S. Daliry The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae Global Journal of Environmental Science and Management chlorella sp biomass productivity growth rate environment |
| title | The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae |
| title_full | The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae |
| title_fullStr | The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae |
| title_full_unstemmed | The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae |
| title_short | The effects of glucose, nitrate, and pH on cultivation of Chlorella sp. Microalgae |
| title_sort | effects of glucose nitrate and ph on cultivation of chlorella sp microalgae |
| topic | chlorella sp biomass productivity growth rate environment |
| url | https://www.gjesm.net/article_44603_01c96b7e51d18cc74e1fc014f25f20dc.pdf |
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