Membrane autopsy to provide solutions to operational problems of Jerba brackish water desalination plant

Farhat, Soumaya; Bali, Mahmoud; Fethi, Kamel

doi:10.1016/j.desal.2018.08.013

Cited by 18 publications

(10 citation statements)

References 36 publications

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“…The injection was carried out continuously with a dosing rate of 3 mg/L. • Dechlorination: Injection of sodium bisulphate was done in order to prevent polyamide membrane deterioration [28].…”

Section: Reverse Osmosis Processmentioning

confidence: 99%

“…To perform the cleaning in place, it is required to use the permeate dechlorinated water in order to prevent the degradation of the polyamide layer [28].…”

Section: Membrane Cleaning Proceduresmentioning

confidence: 99%

“…1) preparation of the chemical cleaning solutions 2) pumping of the prepared chemical solution to the pressure vessels under the terms of minimal flow and minimal pressure to evacuate existing water from the pressure vessels 3) monitoring of the cleaning solution chemical proprieties and rectifying some parameters such as temperature and pH 4) soaking of the membrane elements by turning off the pump 5) high flux rinsing: supply the chemical solution for 30-60 min. The operation is launched once the differential pressure raises by 15% [28] 6) rinsing the chemical solution contained in the membranes with the RO permeate It is required to clean the RO stages independently and after starting the plant the first production is rejected [28].…”

Section: Membrane Cleaning Proceduresmentioning

confidence: 99%

“…The RO data program [36] was carried out in the present research to standardize the operating parameters relative to temperature, pressure, and osmotic pressure as well as the measured parameters for the first control point for the period of the installation commissioning [28].…”

Section: Operating Data and Normalizationmentioning

confidence: 99%

“…Nevertheless, this procedure is not reliable for detecting the issue of the deposited elements. To determine the species and amounts of the deposits, it is indispensable to carry out the membrane autopsy [28].…”

Section: Introductionmentioning

confidence: 99%

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Impact of the Raw Water Seasonal Variations on the Reverse Osmosis Performance: Khenifra Plant, Morocco

Boulahfa

Belhamidi

Elhannouni

et al. 2019

J. of Wat. & Envir. Tech.

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Reverse osmosis (RO) plays an outstanding role in water desalination worldwide. Performance of this technique depends on membrane fouling and the raw water seasonal variations, especially temperature and raw water salt concentration. Hence, to neutralize the impact of temperature and feed concentration on the performance parameters, the data collected from the brackish surface water plant were standardized through the use of the American Society for Testing and Materials methods. The value of this normalization is to be able to discern the performance variation which is due to the membrane aging and the membrane fouling, scaling or degradation. The present research investigates the real industrial results gathered from the first experience of brackish surface water demineralization by RO in Morocco. The results obtained evidently show that the feed water is subject to serious seasonal variations in terms of feed temperature and feed salts concentration, which noticeably affect the feed pressure, membrane permeability, and permeate conductivity. The standardized permeate flow, standardized pressure drop, and standardized salt passage show that the performance of the plant was steady all over the period of the monitoring and the observed performance decline-was due to membrane fouling.

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Section: Reverse Osmosis Processmentioning

confidence: 99%

“…To perform the cleaning in place, it is required to use the permeate dechlorinated water in order to prevent the degradation of the polyamide layer [28].…”

Section: Membrane Cleaning Proceduresmentioning

confidence: 99%

Section: Membrane Cleaning Proceduresmentioning

confidence: 99%

Section: Operating Data and Normalizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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