FIELD: biotesting of natural and waste water for toxicity on algae test organisms; study of ecology and physiology of algae. SUBSTANCE: device has housing, cassette with seats smoothly distributed over circumference, light-transmitting reservoirs for microalgae, light source and drive with electric motor for rotation of cassette which is mounted at angle relative to horizontal plane. Cassette consists of interconnected disk and ring. Fan for cooling the housing is mounted inside cassette. Thermal sensor for control of fan operation is mounted on side opposite to light source. Housing is provided with open ports for loading the reservoirs and ventilating the interior. Light source is mounted in housing on outer lateral side of cassette. EFFECT: possibility of cultivation of many specimens of algae; enhanced reliability and improved service and technical characteristics. 2 dwg, 1 tbl
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