Decreasing membrane fouling during Chlorella vulgaris broth filtration via membrane development and coagulant assisted filtration

Discart, Valerie; Bilad, Muhammad Roil; Moorkens, R; Arafat, Hassan A.; Vankelecom, Ivo F.J.

doi:10.1016/j.algal.2015.02.029

Cited by 32 publications

(19 citation statements)

References 41 publications

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“…without spraying non-solvent but with direct full immersion in the water bath). Being the common reference method to prepare membranes to harvest microalgae [31,32]. Flat membranes prepared through phase inversion by spraying have been reported to show higher fluxes than when prepared via conventional phase inversion through direct non-solvent immersion.…”

Section: Characterization Of the Psf/spsf Membranementioning

confidence: 99%

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Zhao

Liu

Ilyas

et al. 2021

Journal of Membrane Science

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Key issues for membrane technology in harvesting microalgae are to reach high fluxes and to alleviate fouling by microalgal cells and extracellular organic matter. To achieve this goal, negatively charged patterned membranes were prepared from polysulfone/sulfonated polysulfone (PSf/sPSf) blends using a spray-modified phase inversion method, and the effect of sPSf on the membrane morphology and filtration performance was investigated. The patterned membrane with highest sPSf concentration exhibited the highest clean water permeance (2420±260 L/m 2 h bar), lowest membrane intrinsic resistance (6.1 m -1 ) and highest critical flux (55 L/m 2 h) for harvesting microalgae. Membrane vibration could mitigate membrane fouling both for the patterned and flat membranes. The vibration system can easily achieve turbulent flow at frequencies higher than 7 Hz. The synergy between membrane vibration, surface pattern and charge thus resulted in a clearly membrane performance.

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Section: Characterization Of the Psf/spsf Membranementioning

confidence: 99%

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Zhao

Liu

Ilyas

et al. 2021

Journal of Membrane Science

Self Cite

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“…Alternatively, oxidants are increasingly used in pretreatment to reduce and mineralize the concentration of the smaller organics fraction responsible for irreversible fouling (Liu et al, 2018;Lee et al, 2019Lee et al, , 2021Wan et al, 2019;Ren et al, 2020). Despite their positive impacts on the fouling mitigation, primary challenges arose from concerns related to the effect of the chemical agents on the algal biomass, their release into the environment, and the high energy and capital expenses demanded by these techniques (Discart et al, 2015;Alshahri et al, 2021b).…”

Section: Developments and Challenges Of Algal Fouling Controlmentioning

confidence: 99%

Membrane Fouling in Algal Separation Processes: A Review of Influencing Factors and Mechanisms

2021

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The use of algal biotechnologies in the production of biofuels, food, and valuable products has gained momentum in recent years, owing to its distinctive rapid growth and compatibility to be coupled to wastewater treatment in membrane photobioreactors. However, membrane fouling is considered a main drawback that offsets the benefits of algal applications by heavily impacting the operation cost. Several fouling control strategies have been proposed, addressing aspects related to characteristics in the feed water and membranes, operational conditions, and biomass properties. However, the lack of understanding of the mechanisms behind algal biofouling and control challenges the development of cost-effective strategies needed for the long-term operation of membrane photobioreactors. This paper reviews the progress on algal membrane fouling and control strategies. Herein, we summarize information in the composition and characteristics of algal foulants, namely algal organic matter, cells, and transparent exopolymer particles; and review their dynamic responses to modifications in the feedwater, membrane surface, hydrodynamics, and cleaning methods. This review comparatively analyzes (i) efficiency in fouling control or mitigation, (ii) advantages and drawbacks, (iii) technological performance, and (iv) challenges and knowledge gaps. Ultimately, the article provides a primary reference of algal biofouling in membrane-based applications.

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“…The surface pore of the membrane fabricated via the wet inversion method was affected by the polymer concentration in the dope solution. Application of a lower PVDF concentration may lead to the formation of a PVDF membrane with a larger pore size, as described elsewhere [29,30].…”

Section: Resultsmentioning

confidence: 99%

Improving Water Permeability of Hydrophilic PVDF Membrane Prepared via Blending with Organic and Inorganic Additives for Humic Acid Separation

et al. 2019

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The removal of impurities from water or wastewater by the membrane filtration process has become more reliable due to good hydraulic performance and high permeate quality. The filterability of the membrane can be improved by having a material with a specific pore structure and good hydrophilic properties. This work aims at preparing a polyvinylidene fluoride (PVDF) membrane incorporated with phospholipid in the form of a 2-methacryloyloxyethyl phosphorylcholine, polymeric additive in the form of polyvinylpyrrolidone, and its combination with inorganic nanosilica from a renewable source derived from bagasse. The resulting membrane morphologies were analyzed by using scanning electron microscopy. Furthermore, atomic force microscopy was performed to analyze the membrane surface roughness. The chemical compositions of the resulting membranes were identified using Fourier transform infrared. A lab-scale cross-flow filtration system module was used to evaluate the membrane’s hydraulic and separation performance by the filtration of humic acid (HA) solution as the model contaminant. Results showed that the additives improved the membrane surface hydrophilicity. All modified membranes also showed up to five times higher water permeability than the pristine PVDF, thanks to the improved structure. Additionally, all membrane samples showed HA rejections of 75–90%.

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Decreasing membrane fouling during Chlorella vulgaris broth filtration via membrane development and coagulant assisted filtration

Cited by 32 publications

References 41 publications

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Membrane Fouling in Algal Separation Processes: A Review of Influencing Factors and Mechanisms

Improving Water Permeability of Hydrophilic PVDF Membrane Prepared via Blending with Organic and Inorganic Additives for Humic Acid Separation

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