An activated sludge modeling framework for xenobiotic trace chemicals (ASM-X): Assessment of diclofenac and carbamazepine

2012 ◽  
Vol 109 (11) ◽  
pp. 2757-2769 ◽  
Author(s):  
Benedek Gy. Plósz ◽  
Katherine H. Langford ◽  
Kevin V. Thomas
Keyword(s):  
Activated Sludge ◽  
Modeling Framework ◽  
Trace Chemicals ◽  
Activated Sludge Modeling

Nitrification parameter measurement for plant design: experience and experimental issues with new methods

2005 ◽  
Vol 52 (10-11) ◽  
pp. 461-468 ◽  
Author(s):  
R.M. Jones ◽  
C.M. Bye ◽  
P.L. Dold
Keyword(s):  
Activated Sludge ◽  
Process Design ◽  
Wastewater Treatment Plants ◽  
Measurement Techniques ◽  
Water Environment ◽  
Plant Design ◽  
New Methods ◽  
Nitrification Kinetics ◽  
Activated Sludge Modeling ◽  
Capacity Rating

Nitrification kinetics are important for process design, optimization, and capacity rating of activated sludge wastewater treatment plants. A Water Environment Research Foundation (WERF) project on Methods for Wastewater Characterization in Activated Sludge Modeling (WERF, 2003) focused significantly on the development of procedures for measuring the nitrifier maximum specific growth rate, μAUT. In addition, the importance of (and lack of data for) the nitrifier decay rate, bAUT, was identified. This paper describes three bench-scale methods for measuring μAUT: the Low F/M SBR, Washout and High F/M methods. During the WERF project, the importance of pH and temperature control was investigated briefly; this paper summarizes further experimental work performed to address these issues. A summary of μAUT measurements in a number of locations and using the different measurement techniques is provided.

scholarly journals Optimized biological nitrogen removal of high-strength ammonium wastewater by activated sludge modeling

2017 ◽  
Vol 8 (3) ◽  
pp. 393-403 ◽  
Author(s):  
Abdelsalam Elawwad
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Treatment Plant ◽  
High Strength ◽  
Simulation Software ◽  
Operating Conditions ◽  
Biological Nitrogen Removal ◽  
Sampling Campaign ◽  
Activated Sludge Modeling ◽  
Biological Nitrogen

Abstract Wastewater containing high ammonium concentrations is produced from various industrial activities. In this study, the author used a complex activated sludge model, improved by utilizing BioWin© (EnviroSim, Hamilton, Canada) simulation software, to gain understanding of the problem of instability in biological nitrogen removal (BNR). Specifically, the study focused on BNR in an industrial wastewater treatment plant that receives high-strength ammonium wastewater. Using the data obtained from a nine-day sampling campaign and routinely measured data, the model was successfully calibrated and validated, with modifications to the sensitive stoichiometric and kinetic parameters. Subsequently, the calibrated model was employed to study various operating conditions in order to optimize the BNR. These operating conditions include alkalinity addition, sludge retention time, and the COD/N ratio. The addition of a stripping step and modifications to the configuration of the aerators are suggested by the author to increase the COD/N ratio and therefore enhance denitrification. It was found that the calibrated model could successfully represent and optimize the treatment of the high-strength ammonium wastewater.

Critical review of activated sludge modeling: State of process knowledge, modeling concepts, and limitations

2012 ◽  
Vol 110 (1) ◽  
pp. 24-46 ◽  
Author(s):  
H. Hauduc ◽  
L. Rieger ◽  
A. Oehmen ◽  
M.C.M. van Loosdrecht ◽  
Y. Comeau ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Critical Review ◽  
Knowledge Modeling ◽  
Process Knowledge ◽  
Activated Sludge Modeling

Substrate flux into storage and growth in relation to activated sludge modeling

1999 ◽  
Vol 33 (14) ◽  
pp. 3149-3161 ◽  
Author(s):  
Chundakkau Krishna ◽  
Mark C.M Van Loosdrecht
Keyword(s):  
Activated Sludge ◽  
Activated Sludge Modeling

Reduction of Excess Activated Sludge by Controlling the Motion of Ferrite Particles

2014 ◽  
Vol 134 (4) ◽  
pp. 475-476
Author(s):  
Mahmudul Kabir ◽  
Tatsuya Chiba ◽  
Masafumi Suzuki ◽  
Noboru Yoshimura
Keyword(s):  
Activated Sludge

Study on the Treatment of Excess Activated Sludge on the Return Sludge Line

2014 ◽  
Vol 134 (2) ◽  
pp. 239-240 ◽  
Author(s):  
Mahmudul Kabir ◽  
Masaya Endo ◽  
Masafumi Suzuki ◽  
Noboru Yoshimura
Keyword(s):  
Activated Sludge
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