Effects of Environmental Factors on the Growth, Optical Density and Biomass of the Green Algae Chlorella Vulgaris in Outdoor Conditions

摘要

Effect of environmental factors on the growth of the Chlorella vulgaris wasstudied. C. vulgaris was cultivated in sterilized natural seawater enriched with F/2-Simedium. Then grow in bucket, tub and photobioreactor (PBR) in outdoor condition. Thedaily routine work consisted of culture checkups of optical density, biomass gains,atmosphere lux, culture lux, atmosphere temperature and culture temperature wererecorded. The highest biomass yields were (3.0 μg/ml-1) in December and (2.01 μg/ml-1) inNovember in PBR. The highest deviation was in atmosphere lux in time 8:30 (± 117.7) andlowest deviation was in atmosphere temperature in time 15:00 (± 1.0499). Optical density(OD) indicated that the best growth of C. vulgaris in outdoor condition was obtained in 650lux and also it increased with increasing amount of lux. Tub report of C. vulgaris showeddifferent growing behaviors at the various concentration of light and at the differenttemperatures. Algal production in outdoor PBR is relatively inexpensive, but is onlysuitable for a few, fast-growing specie. Finally, this fact is noteworthy that in outdoorconditions, temperature and light have important role in growth of C. vulgaris in presentstudy.