Relevant bibliographies by topics / Optimization for Tank Turnover Rates

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Academic literature on the topic 'Optimization for Tank Turnover Rates'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Optimization for Tank Turnover Rates"

1

Houlihan, D. F., and P. Laurent. "Effects of Exercise Training on the Performance, Growth, and Protein Turnover of Rainbow Trout (Salmo gairdneri)." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 9 (September 1, 1987): 1614–21. http://dx.doi.org/10.1139/f87-195.

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Rainbow trout (Salmo gairdneri) that were made to swim continuously at 1 body length/s for 6 wk had double the growth rate of tank-rested control fish. The endurance to fatigue at a range of swimming velocities of these trained animals was significantly better than that of the controls. Measurement of the rate of protein synthesis in the tissues was carried out by the free pool flooding technique. Protein degradation rates were calculated from the difference between synthesis and net protein accretion. In controls and trained animals the fractional rates of protein synthesis and degradation were ranked gills > ventricle > red muscle > white muscle whereas the efficiencies of conversion of protein synthetised into protein retained as growth were in the reverse sequence. Synthesis rates in three of the four tissues of the trained animals were approximately double those of the control animals. Calculated degradation rates of proteins also increased in the trained animals; the increased growth rates resulted from the proportionately greater increase in the rate of synthesis. The rate of synthesis decreased to control levels once the trained animals ceased swimming.
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2

Gursu, S., S. A. Sherif, T. N. Veziroglu, and J. W. Sheffield. "Analysis and Optimization of Thermal Stratification and Self-Pressurization Effects in Liquid Hydrogen Storage Systems—Part 1: Model Development." Journal of Energy Resources Technology 115, no. 3 (September 1, 1993): 221–27. http://dx.doi.org/10.1115/1.2905997.

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This paper reports on analyses and optimization studies of problems associated with liquid hydrogen thermal stratification and self-pressurization in cryogenic vessels. Three different pressure rise models were employed to calculate the self-pressurization and boil-off rates. These are a homogeneous model, a surface-evaporation model, and a thermal stratification model. The first two models are based on the assumption that no temperature gradients exist in the tank, while the thermal stratification model takes the temperature distribution into account. Employing the thermal stratification model, temperature gradients and their effect on the pressure rise rates in liquid hydrogen tanks are analyzed.
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3

Klink, Cindy, Juliane Heim, Birgit Daus, Sebastian Eisen, Michael Schlömann, and Simone Schopf. "Bioreactor Process Optimization for Bioleaching of Fine-Grained Residues from Copper Smelting." Advanced Materials Research 1130 (November 2015): 321–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.321.

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Theisen sludge, a fine-grained by-product from copper smelting is a secondary resource for the winning of strategic elements by metal-oxidizing acidophilic bacteria. Screening for cultures, that grew in presence of the toxic heavy metals containing fly ash was successfully performed. Small scale experiments in shaking flasks with subsequent analysis of the pregnant leaching solution (PLS) revealed biological extraction of the major (zinc and copper) and minor metals (cobalt and rhenium). Results were confirmed by XRF analyses of the leaching residue. The bioleaching approach was up-scaled in stirred tank bioreactors under controlled conditions. Optimization of metal-extraction rates will be achieved by regulation of process-parameters, predominantly the redox-potential.
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Bornmann, K., B. Wricke, and D. Habel. "Optimization of particle removal in drinking water treatment of reservoir water in a pressure filter plant." Water Supply 2, no. 1 (January 1, 2002): 241–47. http://dx.doi.org/10.2166/ws.2002.0029.

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Most surface water treatment plants use floc-filtration as the most important treatment step in drinking water production. This paper presents a new technological development which allows floc-filtration to be carried out in pressure filters. Experiments in pilot and full scale show its high efficiency. The technological development allows us to treat algal-rich and high turbid matter containing raw water efficiently at high filtration rates. Floc formation can be realised by means of a special reaction tank in front of the filter inlet. Efficient removal of particles and turbidity is achieved if filtration with filter inlet flow controller is used.
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5

Fernandez, Hernan, Gregorio Iglesias, Rodrigo Carballo, Alberte Castro, Marcos Sánchez, and Francisco Taveira-Pinto. "OPTIMIZATION OF THE WAVECAT WAVE ENERGY CONVERTER." Coastal Engineering Proceedings 1, no. 33 (October 9, 2012): 5. http://dx.doi.org/10.9753/icce.v33.structures.5.

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The development of efficient, reliable Wave Energy Converters (WECs) is a prerequisite for wave energy to become a commercially viable energy source. Intensive research is currently under way on a number of WECs, among which WaveCat©—a new WEC recently patented by the University of Santiago de Compostela. In this sense, this paper describes the WaveCat concept and its ongoing development and optimization. WaveCat is a floating WEC intended for operation in intermediate water depths (50–100 m). Like a catamaran, it consists of two hulls—from which it derives its name. The difference with a conventional catamaran is that the hulls are not parallel but convergent; they are joined at the stern, forming a wedge in plan view. Physical model tests of a 1:30 model were conducted in a wave tank using both regular and irregular waves. In addition to the waves and overtopping rates, the model displacements were monitored using a non-intrusive system. The results of the physical model tests will be used to validate the 3D numerical model, which in turn will be used to optimize the design of WaveCat for best performance under a given set of wave conditions.
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Ramalingam, K., J. Fillos, M. Musabyimana, A. Deur, and K. Beckmann. "Nitrogen removal process optimization in New York City WPCPS: a case study of Wards Island WPCP." Water Science and Technology 60, no. 9 (November 1, 2009): 2447–54. http://dx.doi.org/10.2166/wst.2009.605.

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The New York City Department of Environmental Protection has been engaged in a continuous process to develop a nitrogen removal program to reduce the nitrogen mass discharge from its water pollution control plants, (WPCPs), from 49,158 kg/d to 20,105 kg/d by the year 2017 as recommended by the Long Island Sound Study. As part of the process, a comprehensive research effort was undertaken involving bench, pilot and full scale studies to identify the most effective way to upgrade and optimize the existing WPCPs. Aeration tank 13 (AT-13) at the Wards Island WPCP was particularly attractive as a full-scale research facility because its aeration tank with its dedicated final settling tanks and RAS pumps could be isolated from the remaining treatment facilities. The nitrogen removal performance of AT-13, which, at the time, was operated as a “basic step feed BNR Facility”, was evaluated and concurrently nitrification kinetic parameters were measured using in-situ bench scale experiments. Additional bench scale experiments provided denitrification rates using different sources of carbon and measurement of the maximum specific growth rate of nitrifying bacteria. The combined findings were then used to upgrade AT-13 to a “full” BNR facility with carbon and alkalinity addition. This paper will focus on the combined bench and full scale results that were the basis for the consequent upgrade.
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7

Korneev, R. A., A. R. Tukhvatullin, V. A. Fafurin, R. R. Nigmatullin, and A. V. Shchelchkov. "Optimization of the process of reproducing units of mass and volume of liquid in a stream, mass and volumetric flow rates of liquid for calibration units with weighing devices." Izmeritel`naya Tekhnika, no. 2 (2020): 60–64. http://dx.doi.org/10.32446/0368-1025it.2020-2-60-64.

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The publication presents an experimental method for estimating the minimum time interval for filling a storage tank with a working fluid with a fixed geometry of the nozzle of the flow switch of the calibration plant when playing units of mass and volume of fluid in the flow, mass and volumetric flow rates of the fluid. Experimental studies were performed in a wide range of mass flow rate 11,10–83,26 kg/s (40–300 t/h) with repeated static weighing of the working fluid. The flow switch is made with a fixed geometry of the flow part of the nozzle exit, which is typical for a large number of calibration units in use in our country with weighing devices. The graphical dependences of the mass flow rate on the time of filling the storage capacity obtained from the research results are the basis for optimizing the process of reproducing units of mass and volume of liquid in the flow, mass and volumetric flow rates of the liquid for calibration plants with weighing devices. These graphical dependencies made it possible to formulate recommendations on the reasonable choice of the minimum interval for filling the storage tank with working fluid in the studied range of mass flow rate. Optimization has been tested and can be extended to calibration units with weighing devices from various manufacturers with individual design and operating parameters.
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8

Fuchs, W., D. Bierbaumer, T. Schöpp, N. Weissenbacher, and J. Bousek. "New hybrid reactor concept incorporating a filter mesh for nitritation–anammox treatment of sludge return liquid." Water Science and Technology 76, no. 6 (June 1, 2017): 1409–17. http://dx.doi.org/10.2166/wst.2017.264.

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A new approach to perform partial nitritation–anammox in a single tank was investigated. The tank incorporated a mesh (opening size 1.0 × 1.2 mm) as permeable barrier to create two distinct reaction zones (aerated and anoxic). The study reports on the operation and optimization of a 13 L laboratory scale reactor to treat sludge reject water with an NH4-N concentration of ~750 mg·L−1. Performance throughout 250 days at increasing nitrogen loading rates is presented. The maximum loading rate applied was 1.5 kg NH4-N·m−3·d−1 at a hydraulic retention time of 12 h. Typical composition of the effluent was ~50 mg·L−1 NH4-N; <5–10 mg·L−1 NO2-N and ~60 mg·L−1 NO3-N. The corresponding average N removal rates were 85% for total nitrogen and 90% for NH4-N, respectively. Process control was very simple. It comprised only regulation of the aeration rate to maintain a pre-set pH (7.1) in the nitritation zone. Performance data clearly indicate that the investigated reactor configuration offers distinct advantages over currently installed processes. It demonstrated high robustness without the need for sophisticated process control. Apparently, the use of a permeable mesh to establish different reaction conditions in a single reactor provides new features of high potential.
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9

Poley, Isabela M., and Leandro S. Oliveira. "CFD Modeling and Simulation of Transesterification Reactions of Vegetable Oils with an Alcohol in Baffled Stirred Tank Reactors." Applied Mechanics and Materials 390 (August 2013): 86–90. http://dx.doi.org/10.4028/www.scientific.net/amm.390.86.

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Alcohol and triglycerides do not form a single phase mixture and thus there is a poor surface contact between them causing transesterification to proceed relatively slow. Introduction of stirring improves the surface contact and consequently the reaction rates and biodiesel yields. Thus, in industrial processes, transesterification is usually carried out in stirred tank reactors. Investigating how this type of reactor works is necessary for successful design, operation and optimization. Experimental methods for investigating flow-fields and chemical reactions are expensive and time demanding and cannot meet this challenge accurately. An alternate way is to model and simulate stirred tanks by computational fluid dynamics (CFD). Thus, in this work, a CFD simulation of transesterification was performed, with reaction rates being evaluated by solving a set of differential equations describing the reaction kinetics. The concentrations profiles for the expected components were in accordance with the kinetic model, and the mass fraction patterns showed efficient mixture.
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10

Braunegg, G., G. Lefebvre, G. Renner, A. Zeiser, G. Haage, and K. Loidl-Lanthaler. "Kinetics as a tool for polyhydroxyalkanoate production optimization." Canadian Journal of Microbiology 41, no. 13 (December 15, 1995): 239–48. http://dx.doi.org/10.1139/m95-192.

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The increasing commercial importance of polyhydroxyalkanoates calls for the development of new, more efficient production processes. This can only be achieved by considering the kinetics of polyhydroxyalkanoate accumulation in fermentors, but efforts in this area have been few. In a 10-L fed-batch fermentor, Alcaligenes eutrophus G+3was used to produce poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-co-4HB)) from glucose and γ-butyrolactone, and a strain of Alcaligenes latus was used to produce poly(3-hydroxybutyrate-co-3-hydroxyvalerate) from glucose and propionate. After 83 h of fermentation, 9.26 g∙L−1of A. eutrophus contained 77.8% in mass of a copolymer with 7.9 mol% 4HB. The observed maximum specific growth rate (μmax) was 0.19 h−1for the residual biomass. Alcaligenes latus grew at an observed residual-biomass μmaxof 0.41 h−1and after 33.75 h had produced 6.6 g∙L−1of dry biomass with 72% of a copolymer with 28 mol% 3-hydroxyvalerate. Yields and specific substrate consumption and product formation rates were calculated. Examination of these results and of data found in the literature led to the proposition that for certain polyhydroxyalkanoate production processes, a multi-stage system consisting of a continuous stirred-tank fermentor in series with a plug-flow tubular reactor would be the most productive solution.Key words: polyhydroxyalkanoate, Alcaligenes latus, Alcaligenes eutrophus, kinetics, optimization.
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Dissertations / Theses on the topic "Optimization for Tank Turnover Rates"

1

"Water Supply Infrastructure Modeling and Control under Extreme Drought and/or Limited Power Availability." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.53499.

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abstract: The phrase water-energy nexus is commonly used to describe the inherent and critical interdependencies between the electric power system and the water supply systems (WSS). The key interdependencies between the two systems are the power plant’s requirement of water for the cooling cycle and the water system’s need of electricity for pumping for water supply. While previous work has considered the dependency of WSS on the electrical power, this work incorporates into an optimization-simulation framework, consideration of the impact of short and long-term limited availability of water and/or electrical energy. This research focuses on the water supply system (WSS) facet of the multi-faceted optimization and control mechanism developed for an integrated water – energy nexus system under U.S. National Science Foundation (NSF) project 029013-0010 CRISP Type 2 – Resilient cyber-enabled electric energy and water infrastructures modeling and control under extreme mega drought scenarios. A water supply system (WSS) conveys water from sources (such as lakes, rivers, dams etc.) to the treatment plants and then to users via the water distribution systems (WDS) and/or water supply canal systems (WSCS). Optimization-simulation methodologies are developed for the real-time operation of water supply systems (WSS) under critical conditions of limited electrical energy and/or water availability due to emergencies such as extreme drought conditions, electric grid failure, and other severe conditions including natural and manmade disasters. The coupling between WSS and the power system was done through alternatively exchanging data between the power system and WSS simulations via a program control overlay developed in python. A new methodology for WDS infrastructural-operational resilience (IOR) computation was developed as a part of this research to assess the real-time performance of the WDS under emergency conditions. The methodology combines operational resilience and component level infrastructural robustness to provide a comprehensive performance assessment tool. The optimization-simulation and resilience computation methodologies developed were tested for both hypothetical and real example WDS and WSCS, with results depicting improved resilience for operations of the WSS under normal and emergency conditions.
Dissertation/Thesis
Doctoral Dissertation Civil, Environmental and Sustainable Engineering 2019
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