This study aims to address engineering problems such as soil settlement, lateral displacement of enclosure structures, and reduction of groundwater caused by deep foundation pit dewatering, recharge, and excavation in a deep confined water environment in Jinan, Shandong. Based on a typical deep foundation pit project on Jinan rail transit …Web
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1. Introduction on the excavation size, soil type, and local environmental regulations. Dewatering is an engineering technique to solve the problems Dewatering system …Web
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The design and optimization of the dewatering scheme for deep foundation pits in a highly permeable heterogeneous layer are critical to protect water resources, control subsidence and mitigate environmental impacts. Numerical simulation is an important and sometimes the only tool in the design of dewatering schemes, especially when the …Web
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In this study, a linked simulation–optimization approach is proposed for optimal dewatering system design for an excavation site. …Web
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The results show that the optimization of the dewatering implemented in this research can provide a useful model and ... the state variables, and the optimization management model,Web
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Aluminum cost was taken to be $ 1.733/kg 1, alum cost $ 0.2/kg 2, the electricity cost was $ 0.105/kWh (The State Grid Corporation of China/Fujian Province ... further combination of other different single dewatering technologies, optimization of different working parameters, choice of process materials and chemicals, and rigorous life cycle ...Web
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The results show that the optimization of the dewatering implemented in this research can provide a useful model and framework for solving dewatering of mining site problems. ... [11], which supports the simulation and optimization of only the steady state. This approach means that in the dewatering system, for each well, only a single rate of ...Web
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The foundation pit of Yamansu hydropower station has an average depth of 70 m and has been excavated with five-level slopes. Lowering of groundwater level is important in excavation. In this study, drainage and pumping were conducted in dewatering. Pumping tests were performed to reverse hydraulic parameters and calibrate numerical models. …Web
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A method of designing dewatering systems is presented. • The method considers hydrocyclones and thickeners as dewatering equipments. • A comparison with …Web
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In order to achieve the optimization of the entire filtration and dewatering process, we obtained enough data from the industrial filtration and dewatering system, …Web
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Therefore, dewatering rate optimization is so important for the CBM production. ... (2018) Characteristics of in-situ stress state and prediction of the permeability in the Upper Permian coalbed methane reservoir, western Guizhou region, SW China. Journal of Petroleum Science and Engineering 165(2): ...Web
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The huge output of sewage sludge has caused a remarkable environmental burden. Sludge dewatering is considered as an important way to reduce the sludge volume. Five imidazole-based ionic liquids were used to improve the dewaterability of sewage sludge. 1-ethyl-3-methylimidazolium dihydrogen phosphate ([Emim][H 2 PO 4]) was …Web
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Decanter Centrifuges for Sludge Dewatering WELCOME TO DECANTER CENTRIFUGE OPTIMIZATION! This seminar shall be a practical guidance to centrifuge optimization. Topics are: Theory of Operation Process Parameter Adjustments Any questions will be answered at the end of this presentation. Duration: 30 minutes with 15 minute question …Web
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Background Dewatering constitutes a major challenge to the production of microalgae, accounting for 20–30% of the product cost. This presents a setback for the applicability of microalgae in the development of several sustainable products. This study presents an investigation into the dynamic dewatering of microalgae in a combined …Web
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To solve these problems, the authors propose a two-step coordinated optimization model for the dewatering process based on production data. The …Web
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Dewatering technology is influenced by geology, groundwater levels, and the type of excavation. Sumps, wells, and well points are the most popular dewatering methods. Sumps perform best in fine-grained soils or coarse boulder deposits; pumping from perforated drums or casings in a gravel-Web
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The existing dewatering design methods are mostly based on the optimization of pumping rate needed to maintain a stable water level, while the drop …Web
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Optimization of production rates is essential to realize higher ultimate recoveries. Lower ultimate recovery (20% and less) results from higher viscosities (e.g. Gela and Rospo Mare fields, Italy) or excessively high production rates and early water breakthrough (e.g. Liubei Field, China, and Emma Field, USA) where early cessation of …Web
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The results of the research indicate that thickening and dewatering optimization of oil sands tailings can be achieved by directly measuring the polymer concentration using an in-line UV–vis spectrophotometer that can generate real-time information. ... At this state, these fine tailings are called mature fine tailings or MFT …Web
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Abstract. Effects of pressure, dewatering time, and sludge cake thickness on the dewatering of wastewater sludge by the hydraulic dehydrator under the condition of adding CaO and FeSO 4 were analyzed using the response surface method (RSM). It was found that when the parameters of pressure, dewatering time, and sludge cake thickness were …Web
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In this study, optimization of dewatering process in Zareshouran gold processing plant is carried out using hydrocyclone containing circuit. For this purpose, 12 experiments using 4 spigots with 2 ...Web
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The oily CRM sludge in this state could be utilized as a raw material for ironmaking without negative effects in the granulation process. ... Xing, J., Fan, X. et al. Oily cold rolling mill sludge conditioned by quicklime to improve dewatering performance: optimization and mechanism study. Environ Sci Pollut Res 30, 91125–91139 (2023 ). …Web
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In this study, a linked simulation–optimization model is proposed to solve excavation site dewatering problems. In the simulation part of the proposed model, the …Web
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MGO Tutorial - Dewatering Scenario Introduction Pumping well optimization technology is used to determine the ideal pumping well locations, and ideal pumping rate s at these locations, in order to minimize or maximize a specified criteria. Typically, pumping well optimization is used in the following applications:Web
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DOI: 10.1016/J.ENGGEO.2010.05.002 Corpus ID: 129761778; Numerical simulation of deep foundation pit dewatering and optimization of controlling land subsidence @article{Zhou2010NumericalSO, title={Numerical simulation of deep foundation pit dewatering and optimization of controlling land subsidence}, …Web
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The results show that the optimization of the dewatering implemented in this research can provide a useful model and framework for solving dewatering of mining site problems. The optimization of a pumping well was used by [3] to identify the perfect …Web
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Coal pores are the locations of coalbed methane occurrence and enrichment and the main storage space targeted in CO2 sequestration. The systematic investigation of the coal pore structure and its development is of great significance to provide insights into coalbed methane generation, coal mine gas outburst mechanisms, and coal seam CO2 …Web
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• State-of-the-Practice in Biosolids/Polymer Blending for Biosolids Dewatering David W. Oerke, P.E. BCEE Polymer 101: Chemistry, Handling/Storage, ... Dewatering Optimization: Practical Ways to Improve Performance - Laboratory Testing Topics Laboratory polymer makedown Polymer dosage calculationWeb
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Recovery of microalgae from culture is the first and most vital stage in biomass downstream processing [7].The aim of harvesting and dewatering is concentrating the culture to slurry of about 15–25% solid, a cake or solid for further downstream processing [37].Microalgal harvesting and dewatering can be carried out via single-stage or multi …Web
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State College, PA, November 1 – 2, 2018. Annual Average Dewatering Cost (2 011-2014) = $3.7M K. Tagney and R. Gupta, Reducing Dewatering Costs through Optimization Program, 2017 WEFTEC. Dewatering Cost at EMWD - $3.7M/yr Polymer Cost - Average $1.2 M/yr AR2. Presentation Overview 1. Science of Polymer ActivationWeb
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Dewatering rate optimization. Fig. 5 is a schematic diagram to show the relationship between dewatering rate and pressure propagation. It is seen that low dewatering rate will cause gentle pressure funnel and long investigation distance, while high dewatering rate is companied with sharp pressure funnel and short investigation …Web
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Dewatering optimization of coal seam gas production wells: a review and future perspectives. Energy and Fuels, 36 (17), 9785-9820. doi: 10.1021/acs.energyfuels.2c01575 ... Reassessment of coal permeability evolution using steady-state flow methods: the role of flow regime transition. International Journal of Coal Geology, 211 103210, 103210 ...Web
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State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang, China. Correspondence. ... To solve these problems, the authors propose a two‐step coordinated optimization model for the dewatering process based on production data. The prediction model of the dewatering process is …Web
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