A mathematical modelling study of fluid flow and mixing in full-scale gas-stirred ladles

2009 ◽  
Vol 9 (6/7) ◽  
pp. 345 ◽  
Author(s):  
Schalk W.P. Cloete ◽  
Jacques J. Eksteen ◽  
Steven M. Bradshaw
Keyword(s):  
Fluid Flow ◽  
Mathematical Modelling ◽  
Full Scale ◽  
Modelling Study

Mathematical modelling study group

2011 ◽  
Vol 11 (3) ◽  
pp. 10-10
Author(s):  
Ben Nuttall
Keyword(s):  
Mathematical Modelling ◽  
Study Group ◽  
Modelling Study

scholarly journals Comparing COVID-19 vaccine allocation strategies in India: A mathematical modelling study

2020 ◽  
Author(s):  
Brody H. Foy ◽  
Brian Wahl ◽  
Kayur Mehta ◽  
Anita Shet ◽  
Gautam I. Menon ◽  
...  
Keyword(s):  
Mathematical Modelling ◽  
Allocation Strategies ◽  
Modelling Study

scholarly journals Vaccination and non-pharmaceutical interventions for COVID-19: a mathematical modelling study

2021 ◽  
Author(s):  
Sam Moore ◽  
Edward M Hill ◽  
Michael J Tildesley ◽  
Louise Dyson ◽  
Matt J Keeling
Keyword(s):  
Mathematical Modelling ◽  
Pharmaceutical Interventions ◽  
Modelling Study

scholarly journals COVID-19 vaccine strategies for Aotearoa New Zealand: a mathematical modelling study

2021 ◽  
Vol 15 ◽  
pp. 100256
Author(s):  
Trung Nguyen ◽  
Mehnaz Adnan ◽  
Binh P Nguyen ◽  
Joep de Ligt ◽  
Jemma L Geoghegan ◽  
...  
Keyword(s):  
New Zealand ◽  
Mathematical Modelling ◽  
Aotearoa New Zealand ◽  
Modelling Study

Model-based evaluation of a new upgrading concept for N-removal

2002 ◽  
Vol 45 (6) ◽  
pp. 169-176 ◽  
Author(s):  
S. Salem ◽  
D. Berends ◽  
J.J. Heijnen ◽  
M.C.M. van Loosdrecht
Keyword(s):  
Mathematical Modelling ◽  
Scale Up ◽  
Treatment Plant ◽  
Ammonia Concentration ◽  
Pilot Scale ◽  
Full Scale ◽  
Model Based ◽  
N Removal ◽  
Quantitative Basis ◽  
Treatment Concepts

Mathematical modelling is considered a time and cost-saving tool for evaluation of new wastewater treatment concepts. Modelling can help to bridge the gap between lab and full-scale application. Bio-augmentation can be used to obtain nitrification in activated sludge systems with a limited aerobic sludge retention time. In the present study the potential for augmenting the endogenous nitrifying population is evaluated. Implementing a nitrification reactor in the sludge return line fed with sludge liquor with a high ammonia concentration leads to augmentation of the native nitrifying population. Since the behaviour of nitrifiers is relatively well known, a choice was made to evaluate this new concept mainly based on mathematical modelling. As an example an existing treatment plant (wwtp Walcheren, The Netherlands) that needed to be upgraded was used. A mathematical model, based on the TUDP model and implemented in AQUASIM was developed and used to evaluate the potential of this bioaugmentation in the return sludge line. A comparison was made between bio-augmentation and extending the existing aeration basins and anoxic tanks. The results of both modified systems were compared to give a quantitative basis for evaluation of benefits gained from such a system. If the plant is upgraded by conventional extension it needs an increase in volume of about 225%; using a bioaugmentation in the return sludge line the total volume of the tanks needs to be expanded by only 75% (including the side stream tanks). Based on the modelling results a decision was made to implement the bioaugmentation concept at full scale without further pilot scale testing, thereby strongly decreasing the scale-up period for this process.

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