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Undergraduate Thesis of Julio Careaga

Careaga, JulioCareerMathematical Civil Engineering, Universidad de Concepción
Enrollment Year2009
Senior Year2016
Thesis TitleMathematical Modeling and Numerical Simulation of Sedimenters with Variable Area in Sewage Treatment Plant (PTAS)

Thesis Summary:

In the first part of this work the comparison of two numerical methods for the resolution of a non-reactive sedimentation problem for sewage treatment plants (PTAS) with variable cross-sectional area is presented. The comparison is motivated by the difference in efficiency of both methods. We present simulations for tanks with different types of geometry and compare the approximate solutions obtained by both methods and a study on the convergence of both methods. In the second part, a reduced model for the batch reactive sedimentation process is presented, a numerical method is presented for the approach of the solution which involves ingredients developed for the non-reactive case. Simulations obtained from the numerical method proposed under different initial conditions are presented; Kynch test, Diehl test and test of overcompressed sludge. And a brief comparison of the behavior of nitrate degradation is shown for the simulations obtained from the Kynch test and Diehl test.

Thesis Director(s) Raimund Bürger
Thesis Project Approval Date2014, October 29
Thesis Defense Date2016, January 28
Professional MonitoringCarries out a research stay at Lund University
PDF TesisDownload Thesis PDF PDF

ISI Publications from the Thesis

Raimund BüRGER, Julio CAREAGA, Stefan DIEHL: A simulation model for settling tanks with varying cross-sectional area. Chemical Engineering Communications, vol. 204, 11, pp. 1270-1281, (2017).

Raimund BüRGER, Julio CAREAGA, Stefan DIEHL: Entropy solutions of a scalar conservation law modelling sedimentation in vessels with varying cross-sectional area. SIAM Journal on Applied Mathematics, vol. 77, 2, pp. 789-811, (2017).

Raimund BüRGER, Julio CAREAGA, Stefan DIEHL, Camilo MEJíAS, Ingmar NOPENS, Elena TORFS, Peter VANROLLEGHEM: Simulations of reactive settling of activated sludge with a reduced biokinetic model. Computers & Chemical Engineering, vol. 92, pp. 216-229, (2016).

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