Four schemes for the foundation dewatering were simulated to test the dewatering design. The duration of pumping was 1 month. The results are shown in Figs. 9, 10, 11, and 12. It can be seen that the previous three schemes can only reach certain drawdown, which can be used to determine the number of operating wells corresponding …Web

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

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

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

To solve these problems, the authors propose a two-step coordinated optimization model for the dewatering process based on production data. The …Web

Dewatering Optimization of Coal Seam Gas Production Wells: A Review and Future Perspectives. Coal seam gas (CSG), as a type of unconventional gas resource, is …Web

Keywords: dewatering, optimization, ground water modelling. ... A response function for steady state condition is developed in this study. The steady-state drawdown response function in discrete form may be …Web

Xu et al. (2017) proposed dewatering rate optimization method based on the characteristics of pressure propagation. And the critical state in his literature is that the BHP drops to the critical desorption pressure at the moment of multi-well pressure interference. For the. Field case studyWeb

This study focuses on optimizing the foundation pit dewatering scheme using the foundation pit dewatering theory and the principles of multi-objective optimization. It explores the development of a multi-objective optimization model and efficient solution technology for foundation pit dewatering. This research focuses on the …Web

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

The unsteady-state nature of sorption and diffusion phenomena in the micropore structure of coal: part 1—theory and mathematical formulation. ... B. X. et al. Dewatering rate optimization for ...Web

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

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

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

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

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

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

the state variables, and the optimization management model, ... The results indicate that the dewatering optimization procedure developed in this paper can serve as a useful template and framework ...Web

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

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

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

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

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

Fairfield-Suisun Sewer District, CA. Solano County, CA, 40 miles North San Francisco. Design capacity: 24 MGD tertiary treatment/ UV. Population served: 135,000. Polymer use for dewatering (screw press) and thickening (GBT) Problems with existing polymer system. Struggled to make proper polymer solution.Web

• 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

the third measure is to lower the groundwater table by pumping water from aquifers and is widely used in open-pit coalmines (Fang et al. 1996; Younger and RobinsWeb

A method of designing dewatering systems is presented. • The method considers hydrocyclones and thickeners as dewatering equipments. • A comparison with …Web

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

Review of these approaches and state-of-the-art reports can be found in Gorelick (1983), Yeh (1992), and Das & Datta (2001). ... Aguado & Remson (1980) developed a model to solve the dewatering optimization problem for maintaining low water levels in an excavation site. They considered a fixed-charge problem with installation and …Web