Guidelines for hydraulic analysis of treatment plants equipped with ultrafiltration and reverse osmosis membranes

Alidai, Arjang; Pothof, I.W.M.

doi:10.1080/19443994.2014.979244

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…Furthermore, emergency control systems are used in combination with anti-surge hardware and may reduce investment costs for the anti-surge hardware significantly [9]. Similar simulators are not only used for the hydraulic design of the water networks and transmission systems, but also for the hydraulic design of treatment facilities [10].…”

Section: Design Phasementioning

confidence: 99%

Physical Simulators of Critical Infrastructures

Pietro¹,

Liberto²,

Flourentzou

et al. 2016

Managing the Complexity of Critical Infrastructures

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Critical Infrastructures are an essential asset in modern societies and our everyday life is heavily dependent on their reliable and secure operation. The problem of controlling and managing critical infrastructures is becoming more and more difficult as they are increasing in size due to the growing demand for the services they provide and the geographical spread required. As these infrastructures become larger and more complex, fewer people understand how these networks work and the interactions between all the components. Thus, models are necessary so as to accurately predict their behavior under steady state or under failure/attack scenarios. This chapter provides a review on modeling and simulation approaches of critical infrastructures and in particular of electric power, telecommunications, water supply and drainage systems, and transportation systems.

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Section: Design Phasementioning

confidence: 99%

Physical Simulators of Critical Infrastructures

Pietro¹,

Liberto²,

Flourentzou

et al. 2016

Managing the Complexity of Critical Infrastructures

View full text Add to dashboard Cite

show abstract

Application Research of an Automatic Control Seawater Reverse Osmosis (SWRO) System Based on the Siemens PLC

Li,

Yuan

2024

Glob. J. Earth Sci. Eng.

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To solve the global environmental problem of a shortage of freshwater resources, seawater desalination is considered one of the most promising solutions. In this research, the main novelty of the seawater desalination system lies in its utilization of a reverse osmosis unit as the core process for producing drinking water. By optimizing the pretreatment section in the process flow, a seawater reverse osmosis (SWRO) control system based on Siemens PLC with a high degree of automation was developed, which has the advantages of convenient maintenance and monitoring. In addition, through research on reverse osmosis systems, the results showed that within two years of operation, the total desalination rates of the primary and secondary reverse osmosis systems were not less than 99% and 97.5%, respectively. Furthermore, the water quality after desalination was tested. When the doses of CaCl2, MgCl2 and NaHCO3 were 20 mg/L, 15 mg/L, and 50 mg/L, respectively, high-quality drinking water was obtained. Finally, a reasonable process plan and corresponding estimates were given for the complex water source conditions. Compared with traditional seawater desalination systems, our system has the advantages of easy operation, efficient water production and lower price. Accordingly, this study will help to solve drinking-water problems in some freshwater-scarce regions.

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Suppression of hydraulic transients for desalination plants based on active control synthesis

et al. 2021

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This paper proposes a control strategy to stabilize a reverse osmosis (RO) desalination system against hydraulic shocks with enhancing productivity and sustainability. First, the effects of hydraulic transients on water quality have been reviewed. The transient waves are approximated by sinusoidal functions so that their effects are incorporated into the controlled system as external disturbances. Next, the active control is implemented based on the adaptive super-twisting (STW) sliding mode control (SMC) algorithms. Then, the robust performance is guaranteed whenever the sliding variables reach the sliding surfaces in finite time despite disturbances. The STW SMC scheme is to eliminate the chattering problems for protecting the valves and to improve the convergence precision for water production. The control gains are adaptable to form an effective controller for dealing with large disturbances such as water hammer during desalination process. The simulation results reveal the superior performances on controlling water product, while eliminating shock waves. Especially, the effect of hydraulic shocks has been dramatically attenuated; hence the plant components are protected to avoid fracture. Finally, the robust stability and performance of the desalination plants are guaranteed against large disturbances to ensure the population with quality water as well as system sustainability.

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Guidelines for hydraulic analysis of treatment plants equipped with ultrafiltration and reverse osmosis membranes

Cited by 3 publications

References 12 publications

Physical Simulators of Critical Infrastructures

Physical Simulators of Critical Infrastructures

Application Research of an Automatic Control Seawater Reverse Osmosis (SWRO) System Based on the Siemens PLC

Suppression of hydraulic transients for desalination plants based on active control synthesis

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