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http://dx.doi.org/10.11614/KSL.2017.50.2.187

Evaluation of Nutrients Removal Efficiency in Effluents of Sewage and Wastewater using Microalgae  

Kim, Sook-chan (Gyeongsangbuk-do Institute of Health and Environment)
Kim, Han-soon (School of Life Science, Kyungpook National University)
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Abstract
This study was intended to evaluate the removal efficiency of nutrients in effluents of wastewater using microalgae. Microalgae used in the culture experiment collected in stream and reservoir located in Gyeongsangbuk-do. Dominant species in prior-culture tank were Monoraphidium contortum, Scenedesmus acutus, Coelastrum microporum and Chlorella sp. Dominant species in synthetic wastewater culture under the 4000 Lux and 8000 Lux were Chlorella sp. and Scenedesmus obliquus. The removal efficiency of $NO_3-N$ under the 4000 Lux and 8000 Lux were 27.2%~88.1% and 63.0%~83.6% respectively. The removal efficiency of $PO_4-P$ under the 4000 Lux and 8000 Lux showed above 93%. Removal efficiency of nutrients of $1.0{\times}10^6cells\;mL^{-1}$ inoculation concentration was more higher than that of nutrients of $1.0{\times}10^5cells\;mL^{-1}$ and $1.0{\times}10^7cells\;mL^{-1}$ inoculation concentration. Microalgae cultured in synthetic wastewater removed 94.9% of TN and 90.0% of TP. The removal rate of TN and TP in synthetic wastewater were $1.961mg\;L^{-1}\;day^{-1}$ and $0.200mg\;L^{-1}\;day^{-1}$ respectively. Nutrient removal efficiency of microalgae according to kinds of wastewater showed the highest in the private sewage.
Keywords
microalgae; nutrients removal; wastewater; sewage;
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Times Cited By KSCI : 9  (Citation Analysis)
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