Effect of iron and magnesium addition on population dynamics and high value product of microalgae grown in anaerobic liquid digestate

Hande Ermis*, Unzile Guven-Gulhan, Tunahan Cakir, Mahmut Altinbas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

In this study, FeSO4 supplementation ranging from 0 to 4.5 mM, and MgSO4 supplementation ranging from 0 to 5.1 mM were investigated to observe the effect on the population dynamics, biochemical composition and fatty acid content of mixed microalgae grown in Anaerobic Liquid Digestate (ALD). Overall, 3.1 mM FeSO4 addition into ALD increased the total protein content 60% and led to highest biomass (1.56 g L−1) and chlorophyll-a amount (18.7 mg L−1) produced. Meanwhile, 0.4 mM MgSO4 addition increased the total carotenoid amount 2.2 folds and slightly increased the biomass amount. According to the microbial community analysis, Diphylleia rotans, Synechocystis PCC-6803 and Chlorella sorokiniana were identified as mostly detected species after confirmation with 4 different markers. The abundance of Chlorella sorokiniana and Synechocystis PCC-6803 increased almost 2 folds both in iron and magnesium addition. On the other hand, the dominancy of Diphylleia rotans was not affected by iron addition while drastically decreased (95%) with magnesium addition. This study helps to understand how the dynamics of symbiotic life changes if macro elements are added to the ALD and reveal that microalgae can adapt to adverse environmental conditions by fostering the diversity with a positive effect on high value product.

Original languageEnglish
Article number3510
JournalScientific Reports
Volume10
Issue number1
DOIs
Publication statusPublished - 1 Dec 2020

Bibliographical note

Publisher Copyright:
© 2020, The Author(s).

Funding

Financial support was received from Istanbul Technical University Scientific Research Projects Coordination Unit (BAP). Project Number: 41563, Year:2018. The authors would like to thank Aycan Arslan, Doğukan Tunay, Ece Polat, Öznur Yıldırım, Romina Sadrazaath and Ruken Zilan Arslan for their help and support.

FundersFunder number
Istanbul Technical University Scientific Research Projects Coordination Unit
British Association for Psychopharmacology41563

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