Microalgae growth and diversity in anaerobic digestate compared to synthetic media
Economizing microalgal cultivation is a considerable milestone targeted by efforts put into microalgal biorefineries. In light of that, the present study was aimed to explore the potential of using anaerobic liquid digestate (ALD) as culture media to grow microalgae and compared it with three differ...
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| Format: | Article |
| Language: | English |
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Alpha Creation Enterprise
2022-03-01
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| Series: | Biofuel Research Journal |
| Subjects: | |
| Online Access: | https://www.biofueljournal.com/article_145621_a6801e0f4174349ddd999254e3dd1066.pdf |
| _version_ | 1797243564373049344 |
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| author | Hande Ermis Ünzile Güven-Gülhan Tunahan Çakır Mahmut Altınbaş |
| author_facet | Hande Ermis Ünzile Güven-Gülhan Tunahan Çakır Mahmut Altınbaş |
| author_sort | Hande Ermis |
| collection | DOAJ |
| description | Economizing microalgal cultivation is a considerable milestone targeted by efforts put into microalgal biorefineries. In light of that, the present study was aimed to explore the potential of using anaerobic liquid digestate (ALD) as culture media to grow microalgae and compared it with three different synthetic media (i.e., N8, BBM, and M8) in terms of biomass yield, fatty acid composition, and nutrient utilization/recovery. Moreover, a mixed culture of wild-type microalgae was employed in this study owing to the ability of mixed cultures to survive extreme conditions, eliminating the risk of losing the culture easily, as it mostly happens with pure cultures. The highest nutrient yield coefficients were achieved when the mixed microalgae culture was cultivated in ALD, where the yield coefficient for nitrogen (YN) and yield coefficient for phosphorus (YP) were 10.7 mg biomass mg-1 N and 98 mg biomass mg-1 P, respectively. The highest lipid content (34%) and the highest concentrations of C16:0 (114 mg L-1) and C18:0 (60.9 mg L-1) were also recorded when the mixed microalgae culture was cultivated in ALD. Furthermore, the polyunsaturated fatty acids (PUFA) content also increased significantly in ALD, a beneficial phenomenon as PUFAs in microalgae allow them to adapt more effectively to extreme conditions. Based on the microbial community analysis performed using the multi-marker metabarcoding approach, Diphylleia rotans, Synechocystis PCC-6803, Cyanobium gracile PCC 6307, and Chlorella sorokiniana were identified as the most abundant species in the ALD growth. Overall, based on the findings of the present study, ALD could be used as a promising cultivation medium for microalgae, offering a process integration approach to combine anaerobic digestion and algae cultivation as an effective way to simultaneously treat the high-strength dark-colored ALD and valorize it into profitable byproducts. |
| first_indexed | 2024-04-24T18:57:07Z |
| format | Article |
| id | doaj.art-328dcb4055e44f14b8812437656c087a |
| institution | Directory Open Access Journal |
| issn | 2292-8782 |
| language | English |
| last_indexed | 2024-04-24T18:57:07Z |
| publishDate | 2022-03-01 |
| publisher | Alpha Creation Enterprise |
| record_format | Article |
| series | Biofuel Research Journal |
| spelling | doaj.art-328dcb4055e44f14b8812437656c087a2024-03-26T15:13:23ZengAlpha Creation EnterpriseBiofuel Research Journal2292-87822022-03-01911551156110.18331/BRJ2022.9.1.2145621Microalgae growth and diversity in anaerobic digestate compared to synthetic mediaHande Ermis0Ünzile Güven-Gülhan1Tunahan Çakır2Mahmut Altınbaş3Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey.PhiTech Bioinformatics, 41400 Gebze, Kocaeli, Turkey.Department of Bioengineering, Gebze Technical University, 41400 Gebze, Kocaeli, Turkey.Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey.Economizing microalgal cultivation is a considerable milestone targeted by efforts put into microalgal biorefineries. In light of that, the present study was aimed to explore the potential of using anaerobic liquid digestate (ALD) as culture media to grow microalgae and compared it with three different synthetic media (i.e., N8, BBM, and M8) in terms of biomass yield, fatty acid composition, and nutrient utilization/recovery. Moreover, a mixed culture of wild-type microalgae was employed in this study owing to the ability of mixed cultures to survive extreme conditions, eliminating the risk of losing the culture easily, as it mostly happens with pure cultures. The highest nutrient yield coefficients were achieved when the mixed microalgae culture was cultivated in ALD, where the yield coefficient for nitrogen (YN) and yield coefficient for phosphorus (YP) were 10.7 mg biomass mg-1 N and 98 mg biomass mg-1 P, respectively. The highest lipid content (34%) and the highest concentrations of C16:0 (114 mg L-1) and C18:0 (60.9 mg L-1) were also recorded when the mixed microalgae culture was cultivated in ALD. Furthermore, the polyunsaturated fatty acids (PUFA) content also increased significantly in ALD, a beneficial phenomenon as PUFAs in microalgae allow them to adapt more effectively to extreme conditions. Based on the microbial community analysis performed using the multi-marker metabarcoding approach, Diphylleia rotans, Synechocystis PCC-6803, Cyanobium gracile PCC 6307, and Chlorella sorokiniana were identified as the most abundant species in the ALD growth. Overall, based on the findings of the present study, ALD could be used as a promising cultivation medium for microalgae, offering a process integration approach to combine anaerobic digestion and algae cultivation as an effective way to simultaneously treat the high-strength dark-colored ALD and valorize it into profitable byproducts.https://www.biofueljournal.com/article_145621_a6801e0f4174349ddd999254e3dd1066.pdfanaerobic digestatemicroalgae cultivationbiodieselnutrient recoverywastewater treatmentprocess integration |
| spellingShingle | Hande Ermis Ünzile Güven-Gülhan Tunahan Çakır Mahmut Altınbaş Microalgae growth and diversity in anaerobic digestate compared to synthetic media Biofuel Research Journal anaerobic digestate microalgae cultivation biodiesel nutrient recovery wastewater treatment process integration |
| title | Microalgae growth and diversity in anaerobic digestate compared to synthetic media |
| title_full | Microalgae growth and diversity in anaerobic digestate compared to synthetic media |
| title_fullStr | Microalgae growth and diversity in anaerobic digestate compared to synthetic media |
| title_full_unstemmed | Microalgae growth and diversity in anaerobic digestate compared to synthetic media |
| title_short | Microalgae growth and diversity in anaerobic digestate compared to synthetic media |
| title_sort | microalgae growth and diversity in anaerobic digestate compared to synthetic media |
| topic | anaerobic digestate microalgae cultivation biodiesel nutrient recovery wastewater treatment process integration |
| url | https://www.biofueljournal.com/article_145621_a6801e0f4174349ddd999254e3dd1066.pdf |
| work_keys_str_mv | AT handeermis microalgaegrowthanddiversityinanaerobicdigestatecomparedtosyntheticmedia AT unzileguvengulhan microalgaegrowthanddiversityinanaerobicdigestatecomparedtosyntheticmedia AT tunahancakır microalgaegrowthanddiversityinanaerobicdigestatecomparedtosyntheticmedia AT mahmutaltınbas microalgaegrowthanddiversityinanaerobicdigestatecomparedtosyntheticmedia |