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Biological contamination and its chemical control in microalgal mass cultures

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Abstract

Microalgae are versatile sources of bioproducts, a solution for many environmental problems. However, and despite its importance, one of the main problems in large-scale cultures—the presence of contaminants—is rarely systematically approached. Contamination, or the presence of undesirable organisms in a culture, is deleterious for the culture and frequently leads to culture crashes. To avoid contamination, closed systems can be used; however, for very large-scale open systems, contamination is unavoidable and remediation procedures are necessary—ranging from physicochemical treatment to addition of biocidal substances. In all cases, early detection and culture monitoring are paramount. This article describes the biological contaminants, contamination mechanisms, and control systems used in open and closed cultures, discussing the latest advances and techniques in the area. It also discusses the complex interactions of algae with other microorganisms that can be expected in cultivation systems.

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Funding

This research was funded by CNPq, the Brazilian National Council for Scientific and Technological Development, grant number 407543/2013-0, and CAPES, the Coordination of Improvement of Higher Education Personnel - PROEX program.

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Correspondence to Júlio Cesar de Carvalho.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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The authors declare that they have no conflict of interest.

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Molina, D., de Carvalho, J.C., Júnior, A.I.M. et al. Biological contamination and its chemical control in microalgal mass cultures. Appl Microbiol Biotechnol 103, 9345–9358 (2019). https://doi.org/10.1007/s00253-019-10193-7

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  • DOI: https://doi.org/10.1007/s00253-019-10193-7

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