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Characteristics of Microalgal Growth on Anaerobic Effluent of Animal Waste  

Lim, Byung-Ran (Environmental Material Education Center, Seoul National University of Technology)
Lee, Kisay (Department of Environmental Engineering and Biotechnology, Myongji University)
Noh, Seung You (Department of Civil and Environmental System Engineering, Konkuk University)
Park, Ki Young (Department of Civil and Environmental System Engineering, Konkuk University)
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Characteristics of microalgal growth was investigated using anaerobic effluent from two-phase animal waste digestor as substrate. Batch experiments were carried out to investigate the effect of the initial nitrogen and phosphorus concentrations on growth of Microcystis aeruginosa, Chlorella sp. and Euglena gracilis. In 400 times diluted anaerobic effluent (TN 3 mg/L), single cell growth of the Euglena gracilis population increased twice without delay, although Chlorella sp. and Microcystis aerugenos take over 144 hours. Similar appearance with single cell growth was observed in mixed cultures. However, microalgae population did not increase under condition of 10 times diluted influent (TP 3 mg/L) in both pure and mixed cultures, which was affected by high organic and nitrogen concentration. Logistic growth model successfully fitted to determine biokinetic parameters such as ${\lambda}$: lag time, ${\mu}m$: maximal specific growth rate, A: asymptote of growth.
Algae; Anaerobic effluent; Animal waste; Batch culture; Model parameters;
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