TITLE

Activated sludge system modelling and simulations for improving the effluent water quality

AUTHOR(S)
Cheng, C.-Y.; Ribarova, I.
PUB. DATE
June 1999
SOURCE
Water Science & Technology;1999, Vol. 39 Issue 8, p93
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
This paper describes the results from a study carried out to investigate the feasibility of upgrading Parada wastewater treatment plant (WWTP) for biological nitrogen removal. The biological treatment of Parada WWTP is a conventional activated sludge process. Since 1992 onlyone of the three available aeration tanks has been used. Activated Sludge Model No.1 was used as a base for modelling of the activated sludge system. To accomplish all the calculations, AQUASIM software wasapplied. The model was calibrated and verified with data from ParadaWWTP operation. Very good correlations between measured data and simulation results were achieved using stoichiometric and kinetic parameter values proposed by the authors of IAWQ Model No. 1. However, characterisation of the actual wastewater was necessary. Computer simulations with a verified and extended model were done to study whether the capacity of the treatment plant is enough for biological nitrogen removal. Very high effluent quality can be achieved if the first tank volume is used for denitrification, the second and third tank volumesare used for BOD removal and nitrification, the recirculating effluent flow ratio is 1.5 and the sludge age is 15 days.
ACCESSION #
8405847

 

Related Articles

  • Updated Activated Sludge Model n°1 Parameter Values for Improved Prediction of Nitrogen Removal in Activated Sludge Processes: Validation at 13 Full-scale Plants. Choubert, Jean-Marc; Stricker, Anne-Emmanuelle; Marquot, Aurélien; Racault, Yvan; GiIIot, Sylvie; Héduit, Alain // Water Environment Research (10614303);Sep/Oct2009, Vol. 81 Issue 9, p858 

    The Activated Sludge Model n° 1 (ASM I) is the main model used in simulation projects focusing on nitrogen removal. Recent laboratory-scale studies have found that the default values given 20 years ago for the decay rate of nitrifiers and for the heterotrophic biomass yield in anoxic...

  • Identification of overall degradation in sewer systems from long-term measurements and consequences for WWTP simulations. Ahnert, M.; Kuehn, V.; Krebs, P. // Water Science & Technology;2005, Vol. 52 Issue 3, p153 

    In-sewer transformation processes affect significantly design and operation of large wastewater treatment plants. Especially for long-term simulations the degradation has to be considered in order to avoid over- and underestimation. In this paper a method is presented to derive the overall...

  • Treatment of Wastewaters Containing Bisphenol A: State of the Science Review. Melcer, Henryk; Klečka, Gary // Water Environment Research (10614303);Jul2011, Vol. 83 Issue 7, p650 

    The presence of microconstituents in effluents from municipal wastewater treatment plants (WWTPs) and their receiving waters has attracted considerable recent attention. This review summarizes the state of the science on the removal of bisphenol A (BPA) by WWTPs and presents evidence that the...

  • Nitrogen removal by submerged membrane separation activated sludge process Nagaoka, H. // Water Science & Technology;1999, Vol. 39 Issue 8, p107 

    The performance of the submerged membrane separation activated sludge (SMAS) process with intermittent aeration was investigated in a laboratory scale experiment. By intermittent aeration (30 minutes cycle), nitrogen was removed successfully (95% removal rate) from influent containing NH4-N and...

  • Climate change impacts on activated sludge wastewater treatment: a case study from Norway. Plósz, Benedek Gy.; Liltved, Helge; Ratnaweera, Harsha // Water Science & Technology;2009, Vol. 60 Issue 2, p533 

    We present an investigation on climate change effects on a wastewater treatment system that receive sewage collected in a combined sewer system in Oslo, Norway, during winter operation. Results obtained, by contrasting meteorological data with sewage data, show that wastewater treatment plant...

  • Modeling organic nitrogen conversions in activated sludge bioreactors. Makinia, Jacek; Pagilla, Krishna; Czerwionka, Krzysztof; Stensel, H. David // Water Science & Technology;2011, Vol. 63 Issue 7, p1418 

    For biological nutrient removal (BNR) systems designed to maximize nitrogen removal, the effluent total nitrogen (TN) concentration may range from 2.0 to 4.0 g N/m3 with about 25-50% in the form of organic nitrogen (ON). In this study, current approaches to modeling organic N conversions...

  • Occurrence and enrichment of 'bacterial sherpas': climb to sustainability in wastewater treatment. Arnaldos, M.; Pagilla, K. R. // Water Science & Technology;2015, Vol. 72 Issue 9, p1481 

    The paper presents research on hemoglobin (Hb)-expressing bacteria in biological wastewater treatment systems. The outcome(s) will greatly reduce the aeration needs of wastewater treatment plants (WWTPs) and provide insight into emerging biological nitrogen removal processes using low dissolved...

  • Impacts of separate rejection water treatment on the overall plant performance. Wett, B.; Alex, J. // Water Science & Technology;2003, Vol. 48 Issue 4, p139 

    A separate rejection water treatment appears as a high-tech unit process which might be recommendable only for specific cases of an upgrading of an existing wastewater treatment plant. It is not the issue of this paper to consider a specific separate treatment process itself but to investigate...

  • Parameter subset selection for the dynamic calibration of activated sludge models (ASMs): experience versus systems analysis. Ruano, M. V.; Ribes, J.; De Pauw, D. J. W.; Sin, G. // Water Science & Technology;2007, Vol. 56 Issue 8, p107 

    In this work we address the issue of parameter subset selection within the scope of activated sludge model calibration. To this end, we evaluate two approaches: (i) systems analysis and (ii) experience based approach. The evaluation has been carried out using a dynamic model (ASM2d) calibrated...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics