Detailed spatio-temporal solids concentration profiling during batch settling of activated sludge using a radiotracer

Clercq, Jeriffa De; Jacobs, Filip; Kinnear, David J.; Nopens, Ingmar; Dierckx, Rudi; Defrancq, Jacques; Vanrolleghem, Peter A.

doi:10.1016/j.watres.2005.03.023

Cited by 43 publications

(20 citation statements)

References 15 publications

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“…In this study, a simple mass balance PDE model of continuous settling is described, and the unknown model parameters (associated to dispersion effects and settling velocity) are estimated by minimizing the deviation between model prediction and experimental data borrowed from [5,6]. The PDE model is very efficiently solved using a Method of Lines strategy and produces realistic concentration evolutions.…”

Section: Discussionmentioning

confidence: 99%

“…In [5,6], several experiments have been carried out with different sludge types using radioactive tracers and clinical scanner equipment. In the following, three data sets based on sludge coming from a wastewater treatment plant in Deinze, Belgium, are considered.…”

Section: Parameter Estimationmentioning

confidence: 99%

“…Based on such a simulation tool, the present study aims at estimating the unknown model parameters, i.e. the parameters related to the settling velocity and dispersion effects, from batch experimental data available from [5,6]. The resulting settler model is then coupled to the Activated Sludge Model 1 (ASM1) [13] to build a complete simulator of the wastewater treatment plant.…”

Section: Introductionmentioning

confidence: 99%

“…On this basis, a numerical solution procedure based on the MOL is developed in Section 3. In Section 4, model parameters are inferred from experimental data collected on a pilot plant [5][6][7]. A continuous settling model is then coupled to an activated sludge model, including anoxic and aerobic tanks, and simulation results are discussed in Section 5.…”

Section: Introductionmentioning

confidence: 99%

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Settler dynamic modeling and MATLAB simulation of the activated sludge process

Damien

Vasel

Wouwer

2009

Chemical Engineering Journal

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Section: Discussionmentioning

confidence: 99%

Section: Parameter Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Settler dynamic modeling and MATLAB simulation of the activated sludge process

Damien

Vasel

Wouwer

2009

Chemical Engineering Journal

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“…More advanced measurement techniques aiming to provide more detailed information on the sludge settling behaviour over time and depth have been presented in dedicated literature. Examples include detailed spatio-temporal solids concentration measurements by means of a radioactive tracer (De Clercq et al, 2005) and velocity measurements throughout the depth of the sludge blanket with an ultrasonic transducer (Locatelli et al, 2015). However, these techniques require specialised equipment and cannot be routinely performed.…”

Section: Recent Advances In Batch Settling Testsmentioning

confidence: 99%

Experimental Methods in Wastewater Treatment

Loosdrecht¹,

Nielsen²,

López-Vázquez³

et al. 2016

Water Intelligence Online

143

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PrefaceWastewater treatment is a core technology for water resources protection and reuse, as is clearly demonstrated by the great success of its consequent implementation in many countries worldwide. During the last decennia scientific research has made vast progress in understanding the complex and interdisciplinary aspects of the biological, biochemical, chemical and mechanical processes involved. It can be concluded that the global application of existing knowledge and experience in wastewater treatment technology will represent a cornerstone in future water management, as expressed in the Strategic Development Goals accepted by the UN in September 2015.Only about one fifth of the wastewater produced globally is currently being adequately treated. To achieve the goal for sustainable water management by 2030 would require extra wastewater treatment facilities for about 600,000 people each day. I am convinced that this book will make its own significant contribution to meeting this ambitious goal.In the near future, most of the global population will live in cities and in low and middle-income countries, where most wastewater is not adequately treated. Probably the most limiting factor in achieving the goals for sustainable water management is the lack of qualified, well-trained professionals, able to comprehend the scientific research results and transfer them into practice. It is therefore of prime importance to make currently available scientific advances and proven experiences in wastewater treatment technology applications easily accessible worldwide. This was one of the drivers for the development of this book, which represents an innovative contribution to help overcome such a capacity development challenge. The book is most definitely expected to contribute to bridging the gaps between the science and technology, and their practical applications.The great collection of authors and reviewers represents an interdisciplinary team of globally acknowledged experts. The book will therefore make a major contribution to establishing a common professional language, enhancing global communication between wastewater professionals. In addition, the authors have linked the description of the scientific basis for wastewater treatment processes with a video-based online course for the training of students, researchers, engineers, laboratory technicians and treatment plant operators, demonstrating commonly accepted experimentation procedures and their application for lab-, pilot-, and full-scale treatment plant operation.From the perspective of the IWA this book also has the great potential to enhance the development of a new generation of researchers and enable them to communicate on a global scale and beyond their specific field of expertise. Both aspects are urgently needed to develop adapted solutions for specific local conditions and to make them globally available for implementation.There has been a trend for some time that scientific research and practice have been growing apart from each other. Part of the rea...

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Use of the Weibull model on sizing thickeners ‐ Part I: Sedimentation curve representation

et al. 2020

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The present work aims to represent the sedimentation curve of different industrial pulps through the Weibull model PDF, which employs two parameters k and γ, dispensing the graphical methods to design thickeners and clarifiers, using exclusively mathematical equations. This provides greater accuracy and increases significantly the speed in sizing calculations. To ratify the use of the model, sedimentation curves of various types of pulps were generated in the laboratory, several types of curves were obtained through tests given in the literature and exhaustive comparison tests between the data obtained in the tests and those predicted by the model. The proposed model presented good data adjustment in relation to those obtained in several bibliographic references, presenting maximum error of 12%.

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Detailed spatio-temporal solids concentration profiling during batch settling of activated sludge using a radiotracer

Cited by 43 publications

References 15 publications

Settler dynamic modeling and MATLAB simulation of the activated sludge process

Settler dynamic modeling and MATLAB simulation of the activated sludge process

Experimental Methods in Wastewater Treatment

Use of the Weibull model on sizing thickeners ‐ Part I: Sedimentation curve representation

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