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In‐Sewer Wastewater Characterization and Model Parameter Determination Using Respirometry
Author(s) -
Céu Almeida Maria,
Butler David
Publication year - 2002
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143002x140035
Subject(s) - respirometry , wastewater , sanitary sewer , chemical oxygen demand , biological system , substrate (aquarium) , calibration , model parameter , activated sludge model , environmental science , estimation theory , environmental engineering , mathematics , chemistry , activated sludge , statistics , ecology , biochemistry , biology
Experimental determination of wastewater characteristics and model parameters is required for robust modeling of in‐sewer processes. Respirometric assays can be used to determine some of the model parameters, thus reducing the number of model parameters to be determined by model calibration and verification. However, the model structure has to be considered for this purpose. The model used consists of three main modules, namely hydrodynamics, advection and dispersion, and biochemical processes, and is applicable in sewers under aerobic dry‐weather flow conditions. A procedure is proposed to determine important chemical oxygen demand (COD) fractions and model parameters for biochemical processes. Cumulative oxygen utilization proves to be useful for process identification, providing extra information on substrate availability during the assay. While the values obtained for both COD fractions and parameters depend on the model structure adopted, the procedure used can easily be adapted to other model formulations.