Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures
Lately, research on biodiesel production as a renewable and sustainable energy has become increasingly apparent due to the fact that fossil fuel is decreasing and the concern of global warming issues. The third generation of biofuel, which is microalgaebased biodiesel had gained interest over the la...
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my.ums.eprints.191142020-12-19T02:18:22Z https://eprints.ums.edu.my/id/eprint/19114/ Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures Costantine Joannes Rachel Fran Mansa Suhaimi Md. Yasir Jedol Dayou TP Chemical technology Lately, research on biodiesel production as a renewable and sustainable energy has become increasingly apparent due to the fact that fossil fuel is decreasing and the concern of global warming issues. The third generation of biofuel, which is microalgaebased biodiesel had gained interest over the last decade. The ability of microalgae to grow in various conditions is one of its advantages as the potential and promising feedstock for biodiesel. Microalgae can be cultivated in three modes such as photoautotrophic, heterotrophic and mixotrophic culture mode. Unlike photoautotrophic mode where light is required, the heterotrophic mode mainly utilized carbon compounds to grow. On the other hand, the mixotrophic mode is the condition where light and carbon compounds are supplied for microalgae culturing. This paper investigates the cell growth of Chlorella sp. cultivated in photoautotrophic, heterotrophic and mixotrophic culture mode. It was found that Chlorella sp. was capable of producing the highest cell concentration of 6.67 ± 0.56 x 106 cell mL-1 in the photoautotrophic mode for 23 days of cultivation period. This was 1.3 times and 3.2 times greater than the cell concentration in mixotrophic (5.02 ± 0.49 x 106 cell mL-1) and heterotrophic (2.03 ± 0.29 x 106 cell mL-1) culture, respectively. On the contrary, the highest specific growth rate obtained in the study was from heterotrophic mode (0.32 ± 0.04 day-1) followed by photoautotrophic and mixotrophic mode with 0.26 ± 0.05 day-1 and 0.20 ± 0.04 day-1, respectively. Chlorella sp. cell grew well under the photoautotrophic and mixotrophic mode. However, the insufficient of glucose level had contributed to lower cells productivity in the heterotrophic culture. Therefore, the mixotrophic mode could also be an alternative pathway in microalgae cultivation for biodiesel production if the glucose supplied was adequate and at the suitable level. UTM Press 2016 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/19114/1/Comparative%20studies%20of%20cell%20growth%20of%20freshwater%20microalga%20Chlorella%20sp.pdf text en https://eprints.ums.edu.my/id/eprint/19114/7/COMPARATIVE%20STUDIES%20OF%20CELL%20GROWTH%20OF.pdf Costantine Joannes and Rachel Fran Mansa and Suhaimi Md. Yasir and Jedol Dayou (2016) Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures. Jurnal Teknologi, 78 (7). pp. 83-89. ISSN 2180-3722 https://jurnalteknologi.utm.my/index.php/jurnalteknologi/article/view/4349/5432 |
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TP Chemical technology Costantine Joannes Rachel Fran Mansa Suhaimi Md. Yasir Jedol Dayou Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
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Lately, research on biodiesel production as a renewable and sustainable energy has become increasingly apparent due to the fact that fossil fuel is decreasing and the concern of global warming issues. The third generation of biofuel, which is microalgaebased biodiesel had gained interest over the last decade. The ability of microalgae to grow in various conditions is one of its advantages as the potential and promising feedstock for biodiesel. Microalgae can be cultivated in three modes such as photoautotrophic, heterotrophic and mixotrophic culture mode. Unlike photoautotrophic mode where light is required, the heterotrophic mode mainly utilized carbon compounds to grow. On the other hand, the mixotrophic mode is the condition where light and carbon compounds are supplied for microalgae culturing. This paper investigates the cell growth of Chlorella sp. cultivated in photoautotrophic, heterotrophic and mixotrophic culture mode. It was found that Chlorella sp. was capable of producing the highest cell concentration of 6.67 ± 0.56 x 106 cell mL-1 in the photoautotrophic mode for 23 days of cultivation period. This was 1.3 times and 3.2 times greater than the cell concentration in mixotrophic (5.02 ± 0.49 x 106 cell mL-1) and heterotrophic (2.03 ± 0.29 x 106 cell mL-1) culture, respectively. On the contrary, the highest specific growth rate obtained in the study was from heterotrophic mode (0.32 ± 0.04 day-1) followed by photoautotrophic and mixotrophic mode with 0.26 ± 0.05 day-1 and 0.20 ± 0.04 day-1, respectively. Chlorella sp. cell grew well under the photoautotrophic and mixotrophic mode. However, the insufficient of glucose level had contributed to lower cells productivity in the heterotrophic culture. Therefore, the mixotrophic mode could also be an alternative pathway in microalgae cultivation for biodiesel production if the glucose supplied was adequate and at the suitable level. |
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Article |
author |
Costantine Joannes Rachel Fran Mansa Suhaimi Md. Yasir Jedol Dayou |
author_facet |
Costantine Joannes Rachel Fran Mansa Suhaimi Md. Yasir Jedol Dayou |
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Costantine Joannes |
title |
Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
title_short |
Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
title_full |
Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
title_fullStr |
Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
title_full_unstemmed |
Comparative studies of cell growth of freshwater microalga Chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
title_sort |
comparative studies of cell growth of freshwater microalga chlorella sp. in photoautotrophic, heterotrophic and mixotrophic cultures |
publisher |
UTM Press |
publishDate |
2016 |
url |
https://eprints.ums.edu.my/id/eprint/19114/1/Comparative%20studies%20of%20cell%20growth%20of%20freshwater%20microalga%20Chlorella%20sp.pdf https://eprints.ums.edu.my/id/eprint/19114/7/COMPARATIVE%20STUDIES%20OF%20CELL%20GROWTH%20OF.pdf https://eprints.ums.edu.my/id/eprint/19114/ https://jurnalteknologi.utm.my/index.php/jurnalteknologi/article/view/4349/5432 |
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