Comparison of methodologies for fractioning the COD of municipal wastewater and its application in the ASM1 Model
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Abstract
The ASM1 model is applied in wastewater treatment processes and is capable of predicting the removal of organic matter, nitrification and denitrification. For the ASM1 calibration, it is necessary to characterize the influent and effluent of the biological treatment system, and particularly, fractionate the COD into biodegradable, inert, particulate and soluble components. The objective of this work was to make a comparison of different calculation procedures to fractionate the COD (STOWA, ATV-A131 and Influent Advisor) using filters with pores of 0.45 μm. The results obtained with the 3 methods indicated a percentage of 58% of soluble COD and 42% of particulate COD, being then a greater contribution of soluble COD and, therefore, the characterized wastewater is of municipal or domestic origin. According to the methodologies and results of the COD fractions, the 3 methods can be used for their application in the ASM1 model.
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