Membrane Fouling Mitigation: Membrane Cleaning

Lin, Justin Chun Te; Lee, Dong Hoon; Huang, Ch-Hpin

doi:10.1080/01496391003666940

Cited by 169 publications

(84 citation statements)

References 92 publications

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“…Sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) are both commonly used in the membrane cleaning study (Kimura et al, 2004;Lin et al, 2010;Regula et al, 2013;Suárez et al, 2012;Wang et al, 2010). For instance, caustic solution was found to be efficient in restoring flux of membrane that had been fouled with humic acid (HA) (Srisurichan et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Impact of in situ physical and chemical cleaning on PVDF membrane properties and performances

Rabuni

Sulaiman

Aroua

et al. 2015

Chemical Engineering Science

118

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The effect of cleaning process at mild conditions towards PVDF membrane stability is investigated. Two commonly used cleaning agents (NaOH and NaOCl) were found to reduce PVDF membrane stability. The protein retention performance of membrane is reduced subsequent to membrane cleaning process. The stability of PVDF membrane was affected even at a chemical concentration of 0.01 M. a b s t r a c tAppropriate selection of cleaning agent is an important factor to achieve a better cleaning efficiency and this topic has become an ongoing discussion. This work assesses the impacts of sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) aqueous solution towards polyvinylidene fluoride (PVDF) stability at the typical concentrations used in membrane cleaning. The cleaned membranes were characterised using field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR), pure water flux measurement, contact angle, protein retention and tensile testing. Membrane cleaned at elevated temperature and higher concentration presented a higher water flux than the virgin membrane which can be a worrying sign of alteration in membrane properties. The FTIR spectra indicated that the alteration in chemical composition of the membrane causes a reduction in the degree of hydrophilicity. The mechanical properties of the membrane were compromised based on the declination of tensile strength. The findings from this work suggest that the usage of NaOCl as compared to NaOH causes a more detrimental effect towards the stability of the PVDF membrane.

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Section: Introductionmentioning

confidence: 99%

Impact of in situ physical and chemical cleaning on PVDF membrane properties and performances

Rabuni

Sulaiman

Aroua

et al. 2015

Chemical Engineering Science

118

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“…Strategies to mitigate fouling are required to avoid decline in the membrane permeability in dead-end submerged HF systems [6,282,283]. It is possible to minimize fouling both by choosing a suitable membrane material with a reduced tendency to adsorb substances in the feed and by optimizing the operating conditions in the system [5,161,284,285].…”

Section: Techniques For Fouling Control In Dead-end Submerged Membranmentioning

confidence: 99%

“…Typically, physical cleaning is followed by chemical cleaning in membrane applications to effectively mitigate fouling [283]. Chemical cleaning was classified by Lin et al [283] into four categories: (i) clean-in-place (CIP), which involves directly adding chemicals to the submerged HF system; (ii) clean-out-off-place (COP), which involves cleaning the membrane in a separate tank with a higher concentration of chemicals; (iii) chemical washing (CW), which involves adding chemicals to the feed stream; and (iv) chemically enhanced backwashing (CEB), which involves combining chemical and physical cleaning means.…”

Section: Chemical Cleaning In Submerged Hf Membranes-procedure Effecmentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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“…Membranes are designed to foul. Past efforts were devoted to mitigate membrane fouling during MBR operation (Lin et al, 2010). The existing technologies work well at acceptable costs.…”

Section: Challenges and Prospectsmentioning

confidence: 99%