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http://dx.doi.org/10.11001/jksww.2012.26.6.841

Phosphate removal efficiency and the removal rate constant by particle sizes of converter slag and conditions of the wastewater  

Lee, Sang Ho (Dept. of Environmental Engineering, Sangmyung University)
Hwang, Jeong Jae (Dept. of Environmental Engineering, Sangmyung University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.26, no.6, 2012 , pp. 841-849 More about this Journal
Abstract
The effluent quality of phosphorus is strengthened by the national standard to conserve water resources to lessen the eutrophication threat. The soluble phosphate in the wastewater effluent can be removed using the converter slag as solid waste produced through the steel making process. The experiments for removal efficiencies and removal constants were performed for this research with the artificial wastewater following several different conditions, particle size, phosphate concentration and initial pH. The correlation coefficients of Freundlich adsorption isothem were 0.9505 for $PS_A$, 0.9183 for $PS_B$, respectively. The removal efficiency was 87-94 % for $PS_A$ and 90-96 % for $PS_B$ respectively. The pH of the wastewater was elevated to pH 11.8 for the initial pH 8.5, phosphate removal efficiency was the highest as 84 % ~ 98 %. In case of 10 mg/L of the intial phosphate, the removal efficiency was 96 ~ 98 %. The more initial pH increases, the higher the reaction rate constant is.
Keywords
Converter slag; adsorption isotherm; removal efficiency of phosphate; different initial pH; reaction rate constant;
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