Application of electrophysical impact with low potential difference in the cultivation of microalgae Chlorella vulgaris

Microalgae are autotrophic microorganisms that use carbon dioxide as a carbon source. Strains of these microorganisms are used in a wide variety of industries. There are different ways to cultivate microalgae, one of the most promising is the use of a closed photobioreactor system. At the same time, the productivity of these systems remains relatively low. Various modifications are used to increase the yield of biomass, one of which is a module for electrophysical impact. Based on this, a photobioreactor with a device of electrophysical impact was developed to optimize the supplied DC voltage. The results obtained on the chemical composition of the biomass made it possible to select a suitable DC voltage, as 1,2 V, to stimulate culture growth and will be used in studies using other carbon dioxide sources. An analysis of the daily growth dynamics of microalgae under the influence of DC voltage was also carried out, which showed the need to reduce the hydraulic retention time to increase productivity.

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