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The Effect of Genenal Ion for Biological Perchlorate Treatment from Zinc Smelting Inorganic Wastewater  

Kim, Shin-Jo (Water Environmental Control Research Division Water Environmental Research Department National Institute of Environmental Research)
Lee, Ki-Yong (Water Environmental Control Research Division Water Environmental Research Department National Institute of Environmental Research)
Lee, Ki-Cheol (Water Environmental Control Research Division Water Environmental Research Department National Institute of Environmental Research)
Park, Sang-Min (Water Environmental Control Research Division Water Environmental Research Department National Institute of Environmental Research)
Kwon, Oh-Sang (Water Environmental Control Research Division Water Environmental Research Department National Institute of Environmental Research)
Jung, Dong-Il (Water Environmental Control Research Division Water Environmental Research Department National Institute of Environmental Research)
Publication Information
Journal of Korean Society on Water Environment / v.26, no.5, 2010 , pp. 768-774 More about this Journal
Abstract
This study was conducted to provide a technical solution to treat effectively perchlorate from inorganic wastewater of zinc smelting. Despite an inhibition dissolved inorganic substances in the wastewater discharged from zinc smelting has demonstrated with the activity of microbes, biological treatment technology could reduce perchlorate to a satisfactory level under such stressful conditions. It was found that either conductivity or $SO{_4}^{2-}$ concentration of the wastewater was able to be used as the adequate index and the values were $2,450{\mu}S/cm$ and 1,200 ppm respectively. When $SO{_4}^{2-}$ increased from 0 to 16,000 ppm (conductivity : $428{\rightarrow}24,800{\mu}S/cm$), perchlorate biodegradation rate was reduced due to 1/10 times from 0.0365 to 0.0033/h, however, most of perchlorate was removed under the condition of hydraulic retention time (HRT) at 0.5day and mixed liquor volatile suspended solid (MLVSS) at 2,000 ~ 3,000 ppm.
Keywords
Biological treatment; Conductivity; Perchlorate; Zinc smelting;
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