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http://dx.doi.org/10.11001/jksww.2013.27.6.815

Performance Estimation of SBR Aerobic Digestion Combined with Ultrasonication by Numerical Experiment  

Kim, Sunghong (조선대학교 토목공학과)
Kim, Donghan (서원대학교 환경공학과)
Lee, Dongwoo (뉴엔텍(주) 기술연구소)
Publication Information
Journal of Korean Society of Water and Wastewater / v.27, no.6, 2013 , pp. 815-826 More about this Journal
Abstract
Using a developed mathematical model and calibrated kinetic constants, numerical experiments for a aerobic digestion of wastewater sludge by SBR aerobic digestion process combined with ultrasonication (USSBR) were performed in this study. It simulated well the phenomena of the decomposition of particulate organics and the release of organic nitrogen and transformation. To achieve 40 % of particulate organics removal, USSBR process requires only 6 days of SRT and 14 W/L of ultrasonic power whereas SBR aerobic digestion process requires 12 days of SRT. Based on the model simulation results, an empirical equation was presented here. This equation will be used to predict digestion efficiency for the given variables of SRT and ultrasonic power dose. USSBR aerobic digestion process can reduce the nitrogen concentration. The optimal operation strategy for the simultaneous removal of solids and soluble nitrogen in this process is estimated to 7 days of SRT with 14 W/L of ultrasonic power dose while anoxic period was 6 hours out of 24 hours of cycle time. In this condition, 40 % of particulate organics as well as 36 % of total nitrogen will be removed and the soluble nitrogen concentration of the centrate will be lower less then 40 mg/L.
Keywords
aerobic digestion; SBR; ultrasonic treatment; activated sludge model; denitrification;
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Times Cited By KSCI : 2  (Citation Analysis)
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