Browse > Article

Application of SBR Process to Treat Pickling Wastewater including the High Nitrate and Ca+2  

Kim, Seung-jun (Water Environment and Remediation Research Center, Korea Institute of Science and Technology)
Choi, Yong-su (Water Environment and Remediation Research Center, Korea Institute of Science and Technology)
Bae, Woo-keun (Department of Civil and Environmental Engineering, Hanyang University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.2, 2006 , pp. 215-221 More about this Journal
Abstract
This research presents results from laboratory and pilot-scale experiments to remove high-nitrate in pickling wastewater using the sequencing batch reactor (SBR) as a biological method. During the experimental periods, the influent concentrations of NOx-N and $Ca^{+2}$ were analyzed to be 350-1,600 and 700-800 mg/L, respectively. In order to provide carbon source for denitrification, methanol has been added in proportion to the influent nitrate loading. The mean concentrations of MLSS and MLVSS, the fraction of volatile solids in sludge and the sludge volume index were measured to be 27 g/L, 5 g/L, 18.5% and 7.5, respectively. The solid retention time was kept in the range of 18 to 22 days, specific denitrification rate ($U_{dn}$) was $0.301g{NO_3}^--N/gVSS/day$. The oxidized nitrogen concentration of effluent ranged 2-34 mg/L with an average of 5.2 mg/L, the overall reduction in total nitrogen was more than 99.2%. In order to treat the pickling wastewater including the high concentration of nitrate and $Ca^{+2}$, the continuous flow process is not suitable because the specific gravity of the sludge is considerably increased by $Ca^{+2}$, thus the SBR process is shown to be very effective to treat the pickling wastewater.
Keywords
Detection concentration; Detection frequency; Drinking water quality monitoring substances; Drinking water quality standard; Risk assessment;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 American Public Health Association/ American Water Works Association/Water Environment Federa tion. Standard Methods for the Examination of Water and Wastewater, 20th edition. Washington DC, USA (1998).8 (2001)
2 Wilson F., Design Calculations in Wastewater Treatment, E&FN Spon, London, UK (1981)
3 Glass, C. and Silverstein, J., Denitrification of High-Nitrate, High-Salinity Wastewater, Wat. Res., 33(1), pp. 223-229 (1999)   DOI   ScienceOn
4 McCarty, P. L., Beck, L. and Amant, P. St., Biological Denitrification of Wastewater by Addition of Organic Materials Proceedings of the 24th Industrial Waste Conference (W. Lafayette, IN: Purdue University) (1969)
5 Metcalf and Eddy, Inc. Wastewater Engineering: Treatment, Disposal, and Reuse, Third Edition, Mc-Graw-Hill, New York (1991)
6 Mandt, M. G. and Bell, B. A., Oxidation Ditches in Wastewater Treatment, Ann Arbor Science (1982)