Studies on organic foulants in the seawater feed of reverse osmosis plants of SWCC

Dalvi, Abdul Ghani I.; Al-Rasheed, Radwan; Javeed, M.A.

doi:10.1016/s0011-9164(00)00153-3

Cited by 39 publications

(22 citation statements)

References 26 publications

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“…Adsorption phenomena are driven by the nature of the interactions between the organic compounds and UF membrane. Previous studies revealed that a hydrophilic membrane was more suited for adsorption of solutions containing LMW organic compounds, as is the case for natural waters into membrane pores [32,33]. HS is hydrophobic-DOC fraction of seawater.…”

Section: Mfi-uf and Ks Vs Aocmentioning

confidence: 99%

Practical use of standard pore blocking index as an indicator of biofouling potential in seawater desalination

Jeong

Vigneswaran

2015

Desalination

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Section: Mfi-uf and Ks Vs Aocmentioning

confidence: 99%

Practical use of standard pore blocking index as an indicator of biofouling potential in seawater desalination

Jeong

Vigneswaran

2015

Desalination

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“…However, despite the recent noticeable progress in the membrane performance, the membrane still suffers from the membrane fouling that is an accumulation of various contaminants on the membrane surface. Fouling by such a build-up of organic contaminants can cause irreversible damage to the membrane surface, which can deteriorate the membrane performance during the system operation, eventually leading to a shortening of the membrane lifetimes [10,14,15,[22][23][24][25][26][27][28]. The application of LPRO can be also limited by the membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Park

Kwon

2018

Water

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Reverse osmosis (RO) elements operating at a low pressure (LP) or a low energy (LE) are generally called "LPRO" or "LERO", and the nomenclature "LP" and "LE" are convertible due to the interrelated features of the pressure and the energy in the RO process. Not only can LPRO be operated at lower pressures, which enables energy saving, but also at the standard operating pressure with an enhanced permeate flux. In this study, the feasibility of the LPRO element was evaluated in the face of high fouling potential feed water. The commercially available standard RO and LPRO were chosen, and the membrane properties including the fouling susceptibility and the surface characteristics were thoroughly evaluated. The variations of various performance parameters were monitored during an 872 h operation in a pilot system, which was operated in a constant flux mode. Then, the used membranes were analyzed to further verify the fouling load localization and the fouling intensities. The average flux variation of the individual RO elements in a vessel and the economic feasibility of LPRO were also evaluated through a simulation study using an RO system design software. This study showed that the localization of fouling load within a pressure vessel of an LPRO system caused about 20% higher flux decline and almost 2-times higher salt passage than those of a standard RO membrane system. Furthermore, the simulation study predicted that average operating pressure difference ratio (%) between two RO membranes decreased from 24.4% to 17.8% and a substantial quantity of LPRO elements (83.3%) must be replaced to meet the designated water criteria only after 2 years' operation.

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“…Particulate and colloidal matter rejected by the membrane may form compact cakes, which introduce an additional resistance barrier to filtration (Gabelich et al, 2002). Organic fouling is governed in part by interactions between the membrane surface and the organic foulants, as well as between the organic foulants themselves (Dalvi et al, 2000). Microbial attachment and growth on the membrane surface leads to the formation of biofilms, which consist of microbial cells embedded in an extracellular polymeric substances matrix produced by the microbes (Ivnitskya et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

An autopsy study of a fouled reverse osmosis membrane element used in a brackish water treatment plant

et al. 2007

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The fouling of a spiral wound RO membrane after nearly one year of service in a brackish water treatment plant was investigated using optical and electron microscopic methods, FTIR and ICP-AES. Both the top surface and the cross-section of the fouled membrane were analysed to monitor the development of the fouling layer. It has been found that the extent of fouling was uneven across the membrane surface with regions underneath or in the vicinity of the strands of the feed spacer being more severely affected. The fouling appeared to have developed through different stages. In particular, it consisted of an initial thin fouling layer of an amorphous matrix with embedded particulate matter. The amorphous matrix comprised organic-Al-P complexes and the particulate matter was mostly aluminium silicates.Subsequently, as the fouling layer reached a thickness of about 5 to 7 μm, further amorphous material, which is suggested to include extracellular polymeric substances such as polysaccharides, started to deposit on top of the existing fouling layer. This secondary amorphous material did not seem to contain any particulate matter nor any inorganic elements 1 25 26 27 28 29 within it, but acted as a substrate upon which aluminium silicate crystals grew exclusively in the absence of other foulants, including natural organic matter (NOM).

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Studies on organic foulants in the seawater feed of reverse osmosis plants of SWCC

Cited by 39 publications

References 26 publications

Practical use of standard pore blocking index as an indicator of biofouling potential in seawater desalination

Practical use of standard pore blocking index as an indicator of biofouling potential in seawater desalination

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

An autopsy study of a fouled reverse osmosis membrane element used in a brackish water treatment plant

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