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Diagnosis of Wastewater Treatment Processes through the Wastewater COD Fractionation and Process Simulation I : Wastewater COD Fractionation  

Choi, Young-Gyun (대구대학교 환경공학과)
Chung, Tai-Hak (서울대학교 지구환경시스템공학부)
Publication Information
Journal of Korean Society of Water and Wastewater / v.21, no.5, 2007 , pp. 513-520 More about this Journal
Abstract
The simulation programs used for diagnosis and design of activated sludge process require organic fractions in municipal wastewater as the input variables. However, methods for characterizing organic fractions are still under development, and are not standardized. In this study, total COD of municipal wastewater was experimentally subdivided into readily and slowly biodegradable COD as well as soluble and particulate inert COD. The COD fractionation of the three municipal wastewater for one year shows linear relationship between each COD fraction and TCOD concentration with around 100% COD balance. This result means that the COD fraction do not vary very much with time, although the actual influent concentrations vary significantly with time and day. Therefore, the experimentally subdivided COD fractions can be utilized as wastewater specific parameters for the simulation of activated sludge processes.
Keywords
Biodegradability; COD balance; Organic fractionation;
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