Structural and chemical characterization of long-term reverse osmosis membrane fouling in a full scale desalination plant

Melián-Martel, N.; Sadhwani, J. Jaime; Malamis, Simos; Ochsenkühn-Petropoulou, Maria

doi:10.1016/j.desal.2012.08.011

Cited by 70 publications

(33 citation statements)

References 39 publications

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“…This technique is distinguished by its highest accuracy and precision as well as by its simple and fast sample preparation for the elemental analysis. More details of sample preparation and procedure concerning this characterization technique can be found in [127,128]. It must be mentioned that this technique is not used yet for fouling analysis in MD, OD and OMD.…”

Section: X-ray Fluorescence (Xrf)mentioning

confidence: 99%

“…It must be mentioned that this technique is not used yet for fouling analysis in MD, OD and OMD. However, it was used in the assessment of long-term fouling of RO membranes [127].…”

Section: X-ray Fluorescence (Xrf)mentioning

confidence: 99%

“…XRF is a semi-quantitative analytical technique based on wavelength-dispersive spectroscopic principle similar to an electron microprobe [127,128]. The sample material emits secondary or fluorescent X-rays after being excited by a primary X-ray source.…”

Section: X-ray Fluorescence (Xrf)mentioning

confidence: 99%

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Fouling in Membrane Distillation, Osmotic Distillation and Osmotic Membrane Distillation

et al. 2017

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Various membrane separation processes are being used for seawater desalination and treatment of wastewaters in order to deal with the worldwide water shortage problem. Different types of membranes of distinct morphologies, structures and physico-chemical characteristics are employed. Among the considered membrane technologies, membrane distillation (MD), osmotic distillation (OD) and osmotic membrane distillation (OMD) use porous and hydrophobic membranes for production of distilled water and/or concentration of wastewaters for recovery and recycling of valuable compounds. However, the efficiency of these technologies is hampered by fouling phenomena. This refers to the accumulation of organic/inorganic deposits including biological matter on the membrane surface and/or in the membrane pores. Fouling in MD, OD and OMD differs from that observed in electric and pressure-driven membrane processes such electrodialysis (ED), membrane capacitive deionization (MCD), reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF), microfiltration (MF), etc. Other than pore blockage, fouling in MD, OD and OMD increases the risk of membrane pores wetting and reduces therefore the quantity and quality of the produced water or the concentration efficiency of the process. This review deals with the observed fouling phenomena in MD, OD and OMD. It highlights different detected fouling types (organic fouling, inorganic fouling and biofouling), fouling characterization techniques as well as various methods of fouling reduction including pretreatment, membrane modification, membrane cleaning and antiscalants application.

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Section: X-ray Fluorescence (Xrf)mentioning

confidence: 99%

“…It must be mentioned that this technique is not used yet for fouling analysis in MD, OD and OMD. However, it was used in the assessment of long-term fouling of RO membranes [127].…”

Section: X-ray Fluorescence (Xrf)mentioning

confidence: 99%

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Fouling in Membrane Distillation, Osmotic Distillation and Osmotic Membrane Distillation

et al. 2017

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“…The functional groups around 3300 cm -1 were probably N-H stretching vibration and carboxyl group (-COOH) of polyamide ( Figure 5) [23]. Melián-Martel, et al [24] state that hydroxyl absorption at above 3000 cm -1 are hydroxyl groups of polysaccharide. The band at 609 cm -1 indicates that sulphates were contained in the deposit [23].…”

Section: Membrane Fouling and Autopsymentioning

confidence: 95%

“…The foulant components were: C 60.66%, O 18.00%, Na 4.97%, Mg 0.42%, Al 1.73%, Si 3.83%, S 6.43%, Cl 2.39%, Ca 0.21%, and Fe 1.37%. The high C and O concentrations on the membrane surface were probably part of organic foulants and/or microbes [24]. Based on the FTIR and SEM results, the fouling layer on the membrane surface was formed by the accumulation of organic and inorganic compounds.…”

Section: Membrane Fouling and Autopsymentioning

confidence: 99%

Case Study of a Small Scale Reverse Osmosis System for Treatment of Mixed Brackish Water and STP Effluent

Widiasa

Jayanti

2017

J. Eng. Technol. Sci.

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Abstract.A case study on utilizing reverse osmosis (RO) technology to fulfill fresh water needs at a mall and a hotel has been done on Bali Island, Indonesia. A mix of brackish water and sewage treatment plant (STP) effluent was used as feed water in the RO system. The system used 36 membrane elements (CSM RE 8040 BLN) arranged into two stages: 8 pressure vessels (PVs) in the first stage and 4 PVs in the second stage, each loaded with 3 membranes. The objectives of this research were to assess the cleaning effectivity in the plant, to evaluate the cleaning of 1 membrane element using a CIP system, and to assess the use of the membrane for filtration in the pre-treatment system. SEM and FTIR analysis indicated that the foulants on the membrane surface were dominated by organic foulants and inorganic deposits. To clean the discarded membrane the proposed method used NaOH solution (pH 12 and pH 13) and citric acid (pH 2 and pH 3). All membranes displayed a dramatic decline in rejection of about 80%. Based on the rejection tests of SO 4 2-, Cl -, turbidity reduction approached 100%. It can be concluded that an RO membrane that has undergone selectivity decline can be re-used as a filtration membrane in the pre-treatment system.

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Processing and Characterizations: State‐of‐the‐Art and New Challenges

Visakh

2016

Nanostructured Polymer Membranes

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Structural and chemical characterization of long-term reverse osmosis membrane fouling in a full scale desalination plant

Cited by 70 publications

References 39 publications

Fouling in Membrane Distillation, Osmotic Distillation and Osmotic Membrane Distillation

Fouling in Membrane Distillation, Osmotic Distillation and Osmotic Membrane Distillation

Case Study of a Small Scale Reverse Osmosis System for Treatment of Mixed Brackish Water and STP Effluent

Processing and Characterizations: State‐of‐the‐Art and New Challenges

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