Potential of nanofiltration and low pressure reverse osmosis in the removal of phosphorus for aquaculture

C. P. Leo, M. Z. Yahya, S. N M Kamal, A. L. Ahmad, Abdul Wahab Mohammad

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Aquaculture activities in developing countries have raised deep concern about nutrient pollution, especially excess phosphorus in wastewater, which leads to eutrophication. NF, NF90, NF450 and XLE membranes were studied to forecast the potential of nanofiltration and low pressure reverse osmosis in the removal of phosphorus from aquaculture wastewater. Cross-sectional morphology, water contact angle, water permeability and zeta potential of these membranes were first examined. Membrane with higher porosity and greater hydrophilicity showed better permeability. Membrane samples also commonly exhibited high zeta potential value in the polyphosphate-rich solution. All the selected membranes removed more than 90% of polyphosphate from the concentrated feed (75 mg/L) at 12 bar. The separation performance of XLE membrane was well maintained at 94.6% even at low pressure. At low feed concentration, more than 70.0% of phosphorus rejection was achieved using XLE membrane. The formation of intermolecular bonds between polyphosphate and the acquired membranes probably had improved the removal of polyphosphate at high feed concentration. XLE membrane was further tested and its rejection of polyphosphate reduced with the decline of pH and the addition of ammonium nitrate.

Original languageEnglish
Pages (from-to)831-837
Number of pages7
JournalWater Science and Technology
Volume67
Issue number4
DOIs
Publication statusPublished - 2013

Fingerprint

Aquaculture
Nanofiltration
Reverse osmosis
aquaculture
Phosphorus
low pressure
membrane
phosphorus
Membranes
Zeta potential
Wastewater
permeability
removal
reverse osmosis
wastewater
Eutrophication
Hydrophilicity
ammonium nitrate
Developing countries
Nutrients

Keywords

  • Aquaculture
  • Low pressure reverse osmosis
  • Nanofiltration
  • Phosphorus

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

Cite this

Potential of nanofiltration and low pressure reverse osmosis in the removal of phosphorus for aquaculture. / Leo, C. P.; Yahya, M. Z.; Kamal, S. N M; Ahmad, A. L.; Mohammad, Abdul Wahab.

In: Water Science and Technology, Vol. 67, No. 4, 2013, p. 831-837.

Research output: Contribution to journalArticle

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