Since the beginning of the use of microalgal biotechnology, photobioreactors have been designed in different types and shapes. Tubular systems are the most widely used commercial systems and typically designed to use sunlight. Microalgal valuable natural products are used as animal and human food sources, pharmaceuticals and medicines. The unicellular red alga Porphyridium cruentum is a member of the Rodophyta, and their biochemical composition show that it is rich in many important compounds, i.e. protein, carbohydrate, lipids and carotenes. This study aims to describe a dynamic model of a bioreactor conceived for a continuous mass microalgal culture and to detect optimum drying temperature for valuable pigment composition. The P. cruentum were cultured in an experimental tubular photobioreactors as continuously culture method. The cell density of P. cruentum was held around 25.1 x 106 cells mL-1 after the 9th day until the end of experiment with an average harvesting of 10%. As a result of this study, the biomass concentration spanned throughout the entire growth period and during the culture period of 45 days, totally 2250 L of P. cruentum was harvested as liquid biomass. Additionally, highest total β- carotene and chlorophyll a amount was measured as 415.8817.95 μg/g and 1513.1261.78μg/g, respectively when the drying temperature was arranged to 180C at spray dryer. The results of the present study indicate that outdoor tubular photobioreactor systems can be used for growing microalgae and provide many advantages when compared with open systems. Since the best quality of P. cruentum biyomass can be obtained at drying temperature of 180 C.