Field testing of a set-up for cultivation of different size microalgae groups in natural conditions and assessment of the ecological situation in water bodies

A.S. Gulin, R.P. Trenkenshu, E.L. Nevrova, I.A. Kharchuk, A.A. Chekushkin

The A.O. Kovalevsky Institute of Biology of Southern Seas of RAS,

RF, Sevastopol, Nakhimov Av., 2


DOI: 10.33075/2220-5861-2023-2-98-107

UDC 581.526.325:57.083.13                                                                                          


   The work focuses on the characteristics of the cultivation of diatoms. Diatoms have significantly higher growth rates compared to other groups of microalgae. Most strains can double their cell mass in cultures within 24 hours and require a small amount of simple nutrients. Various systems for cultivation are considered and the analysis of their advantages and disadvantages is made. It is concluded that floating photobioreactors are the most promising system.

   Experimental testing of a set-up designed for cultivation of various size groups of microalgae in natural conditions was carried out within forty days in the coastal waters of the Black Sea.

   As a result of the experiment, after taxonomic identification, the possibility of placing and further successful growth of different-sized representatives of three classes of the Bacillariophyta division in the container of the photobioreactor was established. They are promising objects for cultivation aimed at biotechnological production of high biomass.

   The set-up can be proposed as an indicator system for complex monitoring of the state of the environment, since the assessment of the taxonomic composition and microalgae biomass obtained during cultivation reflects the ecological situation in the water body. The use of the photobioreactor may also be of interest for the cultivation of certain indicator species, especially those demanding favorable environmental conditions, with a subsequent assessment of the increase in their abundance and biomass.

Keywords: photobioreactor, floating cultivator, microalgae.

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