Cultivation of microalgas gains popularity in the different countries in recent years. As a result of such intensive development of production the extensive experience in constructioning of various types of bioreactors was gained. The bioreactor for cultivation of microalgas having the cylindrical housing divided by horizontal partitions into sections for input and output of cultural liquid and additional section with an internal specular surface, the bubble device and gate stirrers fixed on blades, the rigidly bound to shaft is developed. Planetary rotation of gate stirrers concerning a shaft creates additional turbulization of the environment, provides alignment of concentration of cells of biomass, prevents emergence of hold-up spots, a premature deposition of cages of culture on the bottom of the device and increases efficiency of cultivation of microalgas. In the main section suspension of a microalga is exposed to the uniform light energy by means of coaxially established filament lamp of a daylight and to reflection of light from an internal specular surface of a housing. In the course of irradiating the filament lamp distinguishes warmth which is compensated by supply of the cooling air the Main difference from other bioreactors the impeller mixer fixed to a shaft in the bottom of a housing, preventing stratifying of the biomass pulp leaving more heavy is obespechivashchy full circulation of cultural liquid in the bottom of the device as in the horizontal, and vertical planes, at minimum mechanical energy consumptions. This device allows to create additional turbulization of the environment, to provide the uniform aeration, decrease in a power consumption on supply of steam-and-gas mixture in a collector, to prevent formation of "stagnant" zones in the bottom of the device.

microalga bioreactor, microalgas, bubble device, impeller mixer, gate mixer

1. Drannikov A.V., Shevtsov A.A., Koptev D.V., Tertychnaya T.N., Mazhulina I.V., Mishinev K.V. Apparat dlya kul'tivirovaniya fotoavtotrofnykh mikroorganizmov [The device for cultivation of photoautotrophic microorganisms]. Patent RF, no. 2650804, 2018.

2. Shevtsov A.A., Drannikov A.V., Ponomarev A.V., Sitnikov N.Yu. Bioreaktor of film type for suspension of photoautotrophic microorganisms. Biotekhnologicheskiye sistemy v proizvodstva pishchevogo syr'ya i produktov [Biotechnological systems in proizvodstvepishchevy raw materials and products: innovative potential and prospects of development: materials of the International scientific and technical conference]. Voronezh, VSUET, 2011. pp 204–206. (in Russian).

3. Yao Y., Ge Y.F., Thomasson J.A., Sui R.X. Algae optical density sensor for pond monitoring and production process control. International Journal of Agricultural and Biological Engineering. 2018. vol. 11. no. 1. pp. 212–217.

4. Valencia R., Giffard-Mena I., Cruz-Lopez R., Garcia-Mendoza E. et al. Growth Profiles, Nutrient composition and Pigments Analysis of Dunaliella salina strain San Quintin. CICIMAR Oceanides. 2018. vol. 33. no. 2. pp. 1–11.

5. Yang Z., Cheng J., Yang W., Zhou J. et al. Developing a water-circulating column photobioreactor for microalgal growth with low energy consumption. Bioresource technology. 2016. vol. 221. pp. 492–497.

6. Bazdar E., Roshandel R., Yaghmaei S., Mardanpour M.M. The effect of different light intensities and light/dark regimes on the performance of photosynthetic microalgae microbial fuel cell. Bioresource technology. 2018. vol. 261. pp. 350–360.

7. Yan N., Fan C., Chen Y., Hu Z. The potential for microalgae as bioreactors to produce pharmaceuticals. International journal of molecular sciences. 2016. vol. 17. no. 6. pp. 962.

8. Hosseini N.S. et al. Microalgae cultivation in a novel top-lit gas-lift open bioreactor. Bioresource technology. 2015. vol. 192. pp. 432–440.

9. Kuznetsova I.V., Lygina L.V., Netesova G.A. Water condition in cells of chlorella. Vestnik VGUIT [Proceedings of VSUET]. 2015. no. 4. pp. 160–164. (in Russian).

10. Sokolan N.I., Kuranova L.K., Voron N.G., Grokhovskii V.A. Investigation of the possibility of producing sodium alginate from the product of processing fucus algae. Vestnik VGUIT [Proceedings of VSUET]. 2018. vol. 80. no. 1. pp. 161–167. doi: 10.20914/2310-1202-2018-1-161-167 (in Russian).