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13th IFAC Symposium on Dynamics and control of process Systems, including Biosystems (DYCOPS)

作者： Kim, Jong Woo Krausch, Niels Aizpuru, Judit Barz, Tilman Lucia, Sergio Martinez, Ernesto C. Neubauer, Peter Bournazou, Mariano N. Cruz Tech Univ Berlin Chair Bioproc Engn Str 17 Juni 135 D-10623 Berlin Germany AIT Austrian Inst Technol GmbH Ctr Energy Giefinggasse 4 A-1210 Vienna Austria Tech Univ Dortmund Dept Biochem & Chem Engn Emil Figge Str 70 D-44227 Dortmund Germany INGAR CONICET UTN Avellandeda 3657S3002GJC Santa Fe Argentina DataHow AG Zurichstr 137 CH-8600 Dubendorf Switzerland

Optimal experimental design for parameter precision attempts to maximize the information content in experimental data for a most effective identification of parametric model. With the recent developments in miniaturization and parallelization of cultivation platforms for high-throughput screening of optimal growth conditions massive amounts of informative data can be generated with few experiments. Increasing the quantity of the data means to increase the number of parameters and experimental design variables which might deteriorate the identifiability and hamper the online computation of optimal inputs. To reduce the problem complexity, in this work, we introduce an auxiliary controller at a lower level that tracks the optimal feeding strategy computed by a high-level optimizer in an online fashion. The hierarchical framework is especially interesting for the operation under constraints. The key aspect of this method are discussed together with an in silico study considering parallel glucose limited bacterial fed batch cultivations. Copyright (C) 2022 Thy Authors.

关键词： Interaction between design and control Bio-applications batch process modeling and control Design of experiments

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Model-based control of an Energy-integrated batch Reactor - Feed Effluent Heat Exchanger System in a Campaign Mode

Model-based Control of an Energy-integrated Batch Reactor - ...

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9th IFAC Symposium on control of Power and Energy Systems (CPES 2015)

作者： Jogwar, Sujit S. Inst Chem Technol Dept Chem Engn Bombay 400019 Maharashtra India

In this paper, a novel model-based cascade control strategy has been developed for an energy-integrated batch reactor-feed effluent heat exchanger system. The presence of two time scales facilitates implementation of such a cascade strategy. An input-output model is developed for the slow dynamics of the system and is used for the design of a model-based controller to achieve desired product purity. The effectiveness of the proposed control strategy for disturbance rejection and operating point transitions is demonstrated with the help of simulation studies. The proposed strategy promises direct saving of energy, material and time.

关键词： batch process modeling and control Energy Integration Cascade control

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Optimal Operation of an Energy Integrated batch Reactor - Feed Effluent Heat Exchanger System 9

Optimal Operation of an Energy Integrated Batch Reactor - Fe...

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9th IFAC Symposium on Advanced control of Chemical processes ADCHEM 2015

作者： Jogwar, Sujit S. Daoutidis, Prodromos Inst Chem Technol Dept Chem Engn Bombay 400019 Maharashtra India Univ Minnesota Dept Chem Engn & Mat Sci Minneapolis MN 55455 USA

Energy integration in batch reactors offers significant savings but at the cost of additional operational constraints. In this paper, optimal operation of a batch reactor-feed effluent heat, exchanger system is pursued for a production campaign. The coupling between Subsequent batches due to energy integration is exploited to predict and thus plan future batches to achieve desired product purity at the end of the production campaign in the presence of disturbances and time-dependent energy prices. The proposed solution leads to better operation compared to a controller with disturbance rejection. (c) 2015, IFAC (International Federation or Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Optimization batch process modeling and control Energy processes and control

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Optimal Operation of an Energy Integrated batch Reactor - Feed Effluent Heat Exchanger System ∗

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IFAC-PapersOnLine 2015年第8期48卷 1192-1197页

作者： Sujit S. Jogwar Pródromos Daoutidis Department of Chemical Engineering Institute of Chemical Technology Mumbai 400019 India Department of Chemical Engineering and Materials Science University of Minnesota Minneapolis MN 55455 USA

Energy integration in batch reactors offers significant savings but at the cost of additional operational constraints. In this paper, optimal operation of a batch reactor-feed effluent heat exchanger system is pursued for a production campaign. The coupling between subsequent batches due to energy integration is exploited to predict and thus plan future batches to achieve desired product purity at the end of the production campaign in the presence of disturbances and time-dependent energy prices. The proposed solution leads to better operation compared to a controller with disturbance rejection.

关键词： Optimization batch process modeling and control Energy processes and control

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Model-based control of an Energy-integrated batch Reactor — Feed Effluent Heat Exchanger System in a Campaign Mode *

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IFAC-PapersOnLine 2015年第30期48卷 209-214页

作者： Sujit S. Jogwar Department of Chemical Engineering Institute of Chemical Technology Mumbai 400019 India

关键词： batch process modeling and control Energy Integration Cascade control

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Characterization of non point source pollutants and their dispersion in Lake Victoria: A case study of Gaba Landing site in Uganda

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IFAC Proceedings Volumes 2010年第6期43卷 455-460页

作者： N. Banadda I. Nhapi U.G. Wali Food Science and Technology Department Makerere University P.O. Box 7062 Kampala (Uganda) Civil Engineering Department University of Zimbabwe Box MP 167 Harare (Zimbabwe) Department of Building and Civil Engineering National University of Rwanda P.O. Box 117 Butare (Rwanda) Fax: +256-414-53.16.41

Lake Victoria is one of the largest freshwater bodies in the world. The lake is bordered by Kenya, Tanzania, and Uganda, and has streams and rivers stretching as far as Burundi and Rwanda feeding into it. A number of studies have reported deteriorating water quality due to pollution. In this study Non Point Source Pollution was the focus and such as 68 samples and 64 samples were collected over two rain seasons and dry season, respectively. All samples were analyzed for nutrients, namely, Ammonia, Nitrite, Nitrate, and Phosphate. Portable meters were used to measure pH, EC, Total Dissolved Solids, Temperature and Dissolved Oxygen instantaneously at point of sample collection while Wagtech methods used to measure nutrients. TSS was measured using gravimetric method. Within the lake, samples were taken at for horizontal transects of 10 metres (m) interval over a distance of 50 m from the shore where surface runoff was released. At each 10 m sampling point, three samples were drawn at vertical distances of 0.5 m, 1.0 m and 1.5 m from water surface using a hand pump with graduated delivery pipe. The aim of this research is to characterize non point pollutants and their dispersion in Lake Victoria. The criterion to be maximized is the R-squared ( R 2 ) value, which is expressed in percent. The results generally show runoff during wet season increases the concentrations of Ammonia, Phosphorus, Nitrites and Nitrates and the associated dispersion is influenced by wind speed and direction, wave speed and direction. Furthermore, it was also noted that nutrient concentrations decrease as one moves deeper from the shores into the lake due to dilution.

关键词： control applications in environmental processes batch process modeling and control water quality nutrients Lake Victoria

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