@article{8769295,
  abstract     = {{Having a reliable influent wastewater characterization is a key factor for designing effective emergency response plans to mitigate the impact of wet-weather events on wastewater treatment plants (WWTPs). This study aims to critically evaluate the application of wastewater characterization methods for fractionating organic matter in influent municipal wastewater during wet-weather events. To this end, sampling campaigns were set up during various wet-weather events at the largest Italian WWTP. The samples were analyzed by physicochemical and respirometric techniques to assess the chemical oxygen demand (COD) fractions. The role of filter pore size and sample pre-treatment in estimating the soluble COD fractions was assessed. Several long-term BOD experiments were performed to measure biodegradable COD fractions, and the reproducibility of the results is demonstrated. Single and multiple-OUR bioassays were conducted to estimate the readily (Ss) and the slowly (Xs) biodegradable fractions. The heterotrophic yield coefficient (YH) was found to be highly influenced by the history of the biomass and the type of substrate consumed, limiting the application of the respirometry tests during wet-weather events. Dilute wastewater confronted the respirometry assays with some practical complications due to inadequate equipment sensitivity and unprecedented oxygen inputs. A comparative analysis of COD fractions showed that a marked divergence might exist between the two fractionation methods during wet-weather events. Finally, an integrated approach is proposed for more reliable wastewater characterization during wet-weather events.}},
  articleno    = {{105238}},
  author       = {{Borzooei, Sina and Simonetti, Marco and Scibilia, Gerardo and Zanetti, Maria Chiara}},
  issn         = {{2213-2929}},
  journal      = {{JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING}},
  keywords     = {{Wastewater treatment plant,Activated sludge models,Respirometry,BOD test,Filtration,Wet-weather event,COD fractionation,CHEMICAL OXYGEN-DEMAND,BIODEGRADABLE ORGANIC-MATTER,ACTIVATED-SLUDGE PROCESSES,COD CHARACTERIZATION,NITROGEN REMOVAL,TREATMENT-PLANT,FRACTIONS,CALIBRATION,STORAGE,DESIGN}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{13}},
  title        = {{Critical evaluation of respirometric and physicochemical methods for characterization of municipal wastewater during wet-weather events}},
  url          = {{http://doi.org/10.1016/j.jece.2021.105238}},
  volume       = {{9}},
  year         = {{2021}},
}

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