Effect of pre-treatment on fouling propensity of feed as depicted by the modified fouling index (MFI) and cross-flow sampler–modified fouling index (CFS–MFI)

Javeed, M.A.; Chinu, K.H.; Shon, Ho Kyong; Vigneswaran, S.

doi:10.1016/j.desal.2008.01.040

Cited by 38 publications

(18 citation statements)

References 11 publications

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“…where t i is initial filtration time (to filter a fixed volume), t f the final filtration time (to filter the same fixed volume), and T f is the elapsed time [53,54] according ASTM D4189-95 [55,56]. Unlike turbidity, which pertains to the amount of solids in a given sample, SDI 15 determines the contaminants that could probably plug the membrane pores [57].…”

Section: Water Qualitymentioning

confidence: 99%

Characteristics of membrane fouling by consecutive chemical cleaning in pressurized ultrafiltration as pre-treatment of seawater desalination

et al. 2015

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Effect of chemical cleaning on pressurized UF as pre-treatment for desalination • NaOCl and oxalic acid showed the optimum results for recovering flux rate • The optimum cleaning combination was oxalic acid-NaOCl-oxalic acid. • Inorganic salts were found to adhere more on the membrane surface. • Hydrophobic foulants were removed easily by chemical cleaning on the surface.Chemical cleaning of membranes is one of the most important strategies in pressurized hollow fiber ultrafiltration (UF) as a pre-treatment for seawater desalination. Various physical cleaning strategies such as backwashing, aeration and air-scrubbing or chemically enhanced backwashing (CEB) have been investigated in order to remove foulants from the UF membrane. However, the limitation in their cleaning effects being found during long-term operation leads to the need of cleaning in place (CIP) for the recovery of membrane performance. In this study, we used oxalic acid and sodium hypochlorite as chemical cleaning agents. The cleaning in series of oxalic acid-sodium hypochlorite-oxalic acid showed the optimal cleaning efficiency and was applied for the consecutive chemical cleaning. The recovery efficiency of the CIP after first, second, third and fourth cleanings was 96.8%, 95.8%, 98.3% and 99.9%, respectively. It was almost fully recovered to the previous recovered value. However, membrane surface structure was deformed by contact with chemical cleaning agents during cleaning time, because, hydrophilic inorganic foulants are still adhered on the membrane surface even after several cleanings although hydrophobic organic foulants were removed easily by chemical cleaning. An improved CIP strategy should be developed to remove hydrophilic foulants for long-term operation of desalination plants.

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Section: Water Qualitymentioning

confidence: 99%

Characteristics of membrane fouling by consecutive chemical cleaning in pressurized ultrafiltration as pre-treatment of seawater desalination

et al. 2015

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“…Javeed et al [18] used the CFS-MFI to assess the effectiveness of different pre-treatments on the fouling potential of synthetic wastewaters using constant pressure. They also reported that the CFS-MFI differed from standard the standard MFI.…”

Section: Introductionmentioning

confidence: 99%

Crossflow Sampler Modified Fouling Index Ultrafiltration (CFS-MFIUF)—An alternative Fouling Index

Sim

Chen

et al. 2010

Journal of Membrane Science

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“…M.A. Jaaved et al [44] calculated the CFS − MFI in continuous operation mode with MFI (in dead-end flow) directly conected to the CFS. Recently, L.N.…”

Section: Indices Derived From Mfimentioning

confidence: 99%

A Critical Review on Predicting Fouling in RO Desalination

Ruiz-García¹,

Melián-Martel²,

I³

2017

Preprint

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RO membrane fouling is one of the main challenges that membrane manufactures, the scientific community and industry professionals have to deal with. The consequences of this inevitable phenomenon have a negative effect on the performance of the desalination system. Predicting fouling in RO systems is key to evaluating the long-term operating conditions and costs. Much research has been done on fouling indices, methods, techniques and prediction models to estimate the influence of fouling on the performance of RO systems. This paper offers a critical review evaluating the state of industry knowledge in the development of fouling indices and models in membrane systems for desalination in terms of use and applicability. Despite major efforts in this field, there are gaps in terms of effective methods and models for the estimation of fouling in full-scale RO desalination plants. In existing models applied to full-scale RO desalination plants, neither the spacer geometry of membranes nor the efficiency and frequency of chemical cleaningswhich play an important role in the performance of this process -are considered.

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Effect of pre-treatment on fouling propensity of feed as depicted by the modified fouling index (MFI) and cross-flow sampler–modified fouling index (CFS–MFI)

Cited by 38 publications

References 11 publications

Characteristics of membrane fouling by consecutive chemical cleaning in pressurized ultrafiltration as pre-treatment of seawater desalination

Characteristics of membrane fouling by consecutive chemical cleaning in pressurized ultrafiltration as pre-treatment of seawater desalination

Crossflow Sampler Modified Fouling Index Ultrafiltration (CFS-MFIUF)—An alternative Fouling Index

A Critical Review on Predicting Fouling in RO Desalination

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