Study of the influence of operating parameters on boron removal by a reverse osmosis membrane

Kheriji, Jamel; Mnif, Amine; Bejaoui, Imen; Hamrouni, Béchir

doi:10.1080/19443994.2014.968902

Cited by 22 publications

(17 citation statements)

References 20 publications

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“…Of all the factors that affect boron retention efficiency, seawater temperature directly influences water and ions diffusion through semipermeable membranes [24,25]. Hence, variations in temperature can bring about changes in salt rejection efficiency by affecting the pressure at which the system works [26].…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Temperature on Boron Concentration Estimation in Desalinated Seawater for Agricultural Irrigation

Escarabajal-Henarejos

Parras-Burgos

Ávila-Dávila

et al. 2021

Water

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After several decades, the incorporation of desalinated seawater into agricultural areas with scarce water resources has become one of the main water supply strategies. Compared to the several currently available desalination techniques, reverse osmosis (RO) is now the reference technology because it lowers energy uses and production costs. Nevertheless, its main limiting factor lies in the membranes used for this system not efficiently retaining boron, which is a problem because the concentration of this element in seawater is high. For 3 years, the present work analysed the impact of seawater temperature on the kinetic parameters of boron rejection in an RO system to establish their annual behaviour and the existing correlation between both parameters. A comparison was made using the values simulated in the projection software provided by the manufacturer of the membranes. The obtained results indicated a high correlation, and the R2 correlation coefficients came very close to the unity. Nonetheless, this correlation lowered with time due to typical membrane ageing and compaction because of the system’s continuous operation. Under the tested working conditions and by applying analysed temperature intervals, it was impossible to reach the 0.3 mg·L−1 boron concentration value that ensures lack of crop toxicity. Thus, incorporating other boron reduction techniques is necessary.

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Section: Introductionmentioning

confidence: 99%

Study of the Influence of Temperature on Boron Concentration Estimation in Desalinated Seawater for Agricultural Irrigation

Escarabajal-Henarejos

Parras-Burgos

Ávila-Dávila

et al. 2021

Water

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“…Only 5.6% of energy production in the Canary Islands is produced by renewable energy sources. As the Canary Islands, a region with resources such as wind or sun, it is vitally important to study how to apply these energy sources in the desalination process to reduce energy demand from other non-renewable sources [ 14 , 15 , 16 ].…”

Section: Methodsmentioning

confidence: 99%

Study of the Ecological Footprint and Carbon Footprint in a Reverse Osmosis Sea Water Desalination Plant

2021

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The water situation in the Canary Islands has been a historical problem that has been sought to be solved in various ways. After years of work, efforts have focused on desalination of seawater to provide safe water mainly to citizens, agriculture, and tourism. Due to the high demand in the Islands, the Canary Islands was a pioneering place in the world in desalination issues, allowing the improvement of the techniques and materials used. There are a wide variety of technologies for desalination water, but nowadays the most used is reverse osmosis. Desalination has a negative part, the energy costs of producing desalinated water are high. To this we add the peculiarities of the electricity generation system in the Canary Islands, which generates more emissions per unit of energy produced compared to the peninsular generation system. In this study we have selected a desalination plant located on the island of Tenerife, specifically in the municipality of Granadilla de Abona, and once its technical characteristics have been known, the ecological footprint has been calculated. To do this we have had to perform some calculations such as the capacity to fix carbon dioxide per hectare in the Canary Islands, as well as the total calculation of the emissions produced in the generation of energy to feed the desalination plant.

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“…Cualquier reducción del consumo específico o en coste de compra de energía, llevara a importantes ahorros económicos. De esta forma, el diseño óptimo de la configuración de la membrana es un factor clave para la eficiencia energética para la planta de desalinización [4,5].…”

Section: Introductionunclassified

Pilot Test of High-Efficiency Membranes for Optimisation of the Membrane System in Carboneras Desalination Plant

Zerpa¹,

Martín

Mendieta-Pino³

2021

DYNAII

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The construction of the new seawater intake for the desalination plant in Las Carboneras (Almería, Spain) was completed in May 2011. Since then, the water intake increased from 14 m to 35 m in depth. A new scenario appeared with the lowest maximum temperatures, while the minimum temperatures remained constant. As a result, new designs and opportunities for operational improvements appeared to optimize the process. To improve the membrane system, a pilot test was developed. This test pilot compared different membranes, and the setup of making 3 different membranes. The test was carried out in high pressure tanks of the full-scale plant (7 elements per tank). The experiment was carried out in two phases: the aging phase and the testing phase. During the aging phase, the membranes of the three manufacturers were tested simultaneously using the same feed water and the same discharge conditions as the full-scale frame in order to achieve the membrane performance estimated by the manufacturer. The main operating parameters were controlled. During the test phase the membranes of each manufacturer were alternately tested in individual tanks with total control of the operating conditions (flow and pressure). The purpose of this test was to compare the performance of the different membranes and determine the optimal configuration of the membrane capable of achieving the necessary quality and quantity of water, with the minimum energy consumption with the new thermal scenario. The results showed the difference in performance between membranes. The study's conclusions could serve as a tool for the decision-making process, related to membrane replacement and plant modernization projects (whose designs are based on the configuration of new high-efficiency membranes). Keywords: Reverse osmosis, membranes, pilot test, energy efficiency, desalination.

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Study of the influence of operating parameters on boron removal by a reverse osmosis membrane

Cited by 22 publications

References 20 publications

Study of the Influence of Temperature on Boron Concentration Estimation in Desalinated Seawater for Agricultural Irrigation

Study of the Influence of Temperature on Boron Concentration Estimation in Desalinated Seawater for Agricultural Irrigation

Study of the Ecological Footprint and Carbon Footprint in a Reverse Osmosis Sea Water Desalination Plant

Pilot Test of High-Efficiency Membranes for Optimisation of the Membrane System in Carboneras Desalination Plant

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