Increasing the vibration frequency to mitigate reversible and irreversible membrane fouling using an axial vibration membrane in microalgae harvesting

Zhao, Fangchao; Chu, Huaqiang; Zhang, Yalei; Jiang, Shuhong; Yu, Zhen; Zhou, Xuefei; Zhao, Jianfu

doi:10.1016/j.memsci.2017.01.039

Cited by 55 publications

(14 citation statements)

References 37 publications

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“…The intensity ratio of Zone B is the highest, over 40%, following are Zone A and Zone T. After UF, the intensity ratio in Zone T and C decreased, while it reduced even more in the permeate from the inline coagulation‐UF. It is reported that the humic‐like substance in Zone C and tryptophan in Zone T are mainly irreversible membrane fouling contributors (Huang et al, ), and irreversible membrane fouling induced the most significant membrane flux reduction (Zhao et al, , ). The inline coagulation can remove such substances; thus, it can be used for the UF‐NF pretreatment.…”

Section: Resultsmentioning

confidence: 99%

Application of coagulation‐ultrafiltration‐nanofiltration in a pilot study for Tai Lake water treatment

Liang

Zhang

Gui

et al. 2019

Water Environment Research

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In this study, the inline coagulation was combined with ultrafiltration and nanofiltration (UF‐NF) in a pilot study for Tai Lake water treatment. The results showed that the combination process was very effective for Tai Lake water treatment in terms of organic removal and membrane fouling control. With inline coagulation, no irreversible membrane fouling was observed for either UF or NF at fluxes of 65–90 and 22–26 L/(m2 hr), respectively. The membrane foulants were analyzed, and the results indicated that the low molecular weight fractions in the feed were main membrane fouling contributors for both UF and NF, where hydrophilic substances and proteins, as well as neutral substances and humic acids with polycarboxyl groups, contributed significantly to UF and NF membrane fouling, respectively. Compared with direct UF‐NF filtration without coagulation, the coagulants could aggregate organic micromolecules for cake formation. With inline coagulation, the moving flocs could generate shear stress to scrub the membrane surface for fouling control of UF. Moreover, with inline coagulation, the organics removal efficiency could be further increased by 10%–20%. With NF, the permeate had a TOC concentration of less than 0.5 mg/L, satisfying the drinking water quality. Therefore, the coagulation‐UF‐NF is very useful for Tai Lake water treatment. Practitioner points Inline coagulation‐UF‐NF for Tai Lake Water treatment is implemented. Inline coagulation can aggregate hydrophilic substances to reduce membrane fouling. Moving flocs produce shear stress for fouling control of UF‐NF. Superior quality of permeate is achieved with the combined coagulation‐UF‐NF process.

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Section: Resultsmentioning

confidence: 99%

Application of coagulation‐ultrafiltration‐nanofiltration in a pilot study for Tai Lake water treatment

Liang

Zhang

Gui

et al. 2019

Water Environment Research

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“…With increasing sPSf concentration, RM decreased in patterned membranes. RM mainly comes from the pore size, the overall membrane porosity and the hydrophilicity of the membrane [37]. The pore size, porosity and hydrophilicity of patterned membranes increase with the introduction of sPSf, resulting in a decline of RM [28].…”

Section: Effect Of Spsf Addition On Membrane Performancementioning

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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“…Other soluble microbial metabolism products such as humin-like substances also contribute to irreversible membrane fouling (Wu et al, 2018;Zhao et al, 2017).…”

Section: Membrane Filtrationmentioning

confidence: 99%

Current and novel approaches to downstream processing of microalgae: A review

Nitsos

Filali

Taidi

et al. 2020

Biotechnology Advances

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Increasing the vibration frequency to mitigate reversible and irreversible membrane fouling using an axial vibration membrane in microalgae harvesting

Cited by 55 publications

References 37 publications

Application of coagulation‐ultrafiltration‐nanofiltration in a pilot study for Tai Lake water treatment

Application of coagulation‐ultrafiltration‐nanofiltration in a pilot study for Tai Lake water treatment

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Current and novel approaches to downstream processing of microalgae: A review

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