Fast and efficient separation of seawater algae using a low-fouling micro/nano-composite membrane

Research output: Contribution to journalArticle

Abstract

High suspended solid loadings due to harmful algal bloom (HAB) pose serious threat to the operation of membrane based desalination plants. Clogging of algal biomass could lead to irreversible damage of the filtration units and eventually disrupting the sustainability of water supply. In this study, we demonstrated a fast and efficient method for separating algae from seawater using a low-fouling micro/nano-composite membrane. The composite membrane was made of a nanoporous nanofiber selective layer on top of a microporous microfiber support layer. The optimized nanoporous selective layer of this composite membrane can effectively separate seawater algae with high efficiency (average 99%) and high flux (3 × 10−5 m3/m2·s) under low operation pressure. More importantly, the membrane exhibits excellent anti-fouling property by maintaining constant water flux and algae rejection rate after a simple backwashing without chemical usage. This superior antifouling property attributes to the underwater superoleophobicity of the composite membrane. These combined merits of fastness, effectiveness and fouling resistance render this membrane-based separation method with greater potential for industrial application.

Original languageEnglish
Pages (from-to)108-112
Number of pages5
JournalDesalination
Volume433
DOIs
Publication statusPublished - 1 May 2018

Fingerprint

Composite membranes
Algae
Fouling
Seawater
fouling
alga
membrane
seawater
Membranes
Fluxes
antifouling
Desalination
Nanofibers
Water supply
Industrial applications
Sustainable development
Biomass
Water
algal bloom
water supply

Keywords

  • Algae removal
  • Composite membrane
  • Low-fouling
  • Pretreatment for seawater desalination
  • Superhydrophilicity

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Cite this

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title = "Fast and efficient separation of seawater algae using a low-fouling micro/nano-composite membrane",
abstract = "High suspended solid loadings due to harmful algal bloom (HAB) pose serious threat to the operation of membrane based desalination plants. Clogging of algal biomass could lead to irreversible damage of the filtration units and eventually disrupting the sustainability of water supply. In this study, we demonstrated a fast and efficient method for separating algae from seawater using a low-fouling micro/nano-composite membrane. The composite membrane was made of a nanoporous nanofiber selective layer on top of a microporous microfiber support layer. The optimized nanoporous selective layer of this composite membrane can effectively separate seawater algae with high efficiency (average 99{\%}) and high flux (3 × 10−5 m3/m2·s) under low operation pressure. More importantly, the membrane exhibits excellent anti-fouling property by maintaining constant water flux and algae rejection rate after a simple backwashing without chemical usage. This superior antifouling property attributes to the underwater superoleophobicity of the composite membrane. These combined merits of fastness, effectiveness and fouling resistance render this membrane-based separation method with greater potential for industrial application.",
keywords = "Algae removal, Composite membrane, Low-fouling, Pretreatment for seawater desalination, Superhydrophilicity",
author = "Kui Wang and Jayaprakash Saththasivam and Wubulikasimu Yiming and Kavithaa Loganathan and Zhaoyang Liu",
year = "2018",
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AU - Wang, Kui

AU - Saththasivam, Jayaprakash

AU - Yiming, Wubulikasimu

AU - Loganathan, Kavithaa

AU - Liu, Zhaoyang

PY - 2018/5/1

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N2 - High suspended solid loadings due to harmful algal bloom (HAB) pose serious threat to the operation of membrane based desalination plants. Clogging of algal biomass could lead to irreversible damage of the filtration units and eventually disrupting the sustainability of water supply. In this study, we demonstrated a fast and efficient method for separating algae from seawater using a low-fouling micro/nano-composite membrane. The composite membrane was made of a nanoporous nanofiber selective layer on top of a microporous microfiber support layer. The optimized nanoporous selective layer of this composite membrane can effectively separate seawater algae with high efficiency (average 99%) and high flux (3 × 10−5 m3/m2·s) under low operation pressure. More importantly, the membrane exhibits excellent anti-fouling property by maintaining constant water flux and algae rejection rate after a simple backwashing without chemical usage. This superior antifouling property attributes to the underwater superoleophobicity of the composite membrane. These combined merits of fastness, effectiveness and fouling resistance render this membrane-based separation method with greater potential for industrial application.

AB - High suspended solid loadings due to harmful algal bloom (HAB) pose serious threat to the operation of membrane based desalination plants. Clogging of algal biomass could lead to irreversible damage of the filtration units and eventually disrupting the sustainability of water supply. In this study, we demonstrated a fast and efficient method for separating algae from seawater using a low-fouling micro/nano-composite membrane. The composite membrane was made of a nanoporous nanofiber selective layer on top of a microporous microfiber support layer. The optimized nanoporous selective layer of this composite membrane can effectively separate seawater algae with high efficiency (average 99%) and high flux (3 × 10−5 m3/m2·s) under low operation pressure. More importantly, the membrane exhibits excellent anti-fouling property by maintaining constant water flux and algae rejection rate after a simple backwashing without chemical usage. This superior antifouling property attributes to the underwater superoleophobicity of the composite membrane. These combined merits of fastness, effectiveness and fouling resistance render this membrane-based separation method with greater potential for industrial application.

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KW - Composite membrane

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KW - Pretreatment for seawater desalination

KW - Superhydrophilicity

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