Advanced treatment of swine wastewater by Botryococcus braunii in a tubular bioreactor
1999
Lee, S.J. | Kim, H.S. | Yoon, B.D. | Oh, H.M. (Korea Research Institute of Bioscience and Biotechnology, Taejon (Korea Republic). Environmental Microbiology Research Unit)
This study was conducted to investigate the production of lipid, and removal of nitrogen and phosphorus from swine wastewater by Botryococcus braunii UTEX 572 in a tubular bioreactor. The rate of dry cell weight increase of B. braunii was highest at 20.1mg/l/d in a modified Chu 13 medium at 25 degrees centigrade. Under the above conditions, the rate of lipid content increase was also highest at 6.1 mg/l/d. The lipid content of B. braunii on a dry weihgt basis ranged from 30.5 to 34.1% with an average value of 32.3%. When B. braunii was cultured in a secondary-treated swine wastewater diluted to 50% with tap water, the rate of dry cell weight increase was 18.6 mg/l/d and the rate of lipid content increase was 6.0 mg/l/d. The lipid content ranged from 30.3 to 34.2%. No significant difference was observed between lipid content and growth conditions. the removal rates of nitrogen and phosphorus in swine wastewater were 43.9% and 41.7%, respectively, after 14 days of incubation.
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