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Retreatment of Arificial Wastewater by using Microalgae  

Lee, Young-Joon (National Institute of Environmental Research)
Lee, Soo-Hyung (National Institute of Environmental Research)
Publication Information
Korean Journal of Ecology and Environment / v.35, no.2, 2002 , pp. 133-140 More about this Journal
Abstract
This study was performed in lab scaled oxidation pond. The removal efficiency of pollutant on the influence of changes of hydraulic retention time and pond style was investigated. The correlation between organic removal efficiency and dissolved oxygen concentration on algal photosynthesis showed the light time revealed a higher relationship more than the dark time, and the squares of the correlation coefficient of 15 days retention time were higher than that of 5 days in single pond. The variation of dissolved oxygen concentration of a series pond was from 4.2 to 19.8 mg/l under 5 days retention time, the concentration of dissolved oxygen increased with increasing step of series pond. Between the single pond and a series of pond system, a series of pond system showed better organic removal efficiency. Average removal efficiency range of $TBOD_5$ and $SBOD_5$ was $49{\sim}83%$ and $87{\sim}92%$, respectively. Algae should be removed appropriately to increase the removal efficiency of organic matter.
Keywords
Algal photosynthesis; Oxidation pond; Growth characteristics;
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