The effect of wastewater pretreatment on nanofiltration membrane performance

Ali Hashlamon, Abdul Wahab Mohammad, Akil Ahmad

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Membrane fouling is considered a serious obstacle for operation and cost efficiency in wastewater treatment using nanofiltration (NF). However, pretreatment is the most practical way to reduce this prior to NF. In this research, two types of wastewaters were pretreated with different methods prior to NF to examine the effect of pretreatment on membrane fouling in terms of turbidity, chemical oxygen demand (COD) and permeate flux. Turbidity and COD were measured to assess solid foulants and organic species in the wastewater, respectively. The first sample was secondary treated sewage, which was pretreated using coagulation-flocculation-sedimentation (CFS) only. Steady flux was increased from 24 L/m2h for wastewater without pretreatment to 32.1 L/m2h with pretreatment. COD was also eliminated after CFS/NF, and turbidity was reduced to 0.6 NTU. The second sample was diluted biodiesel wastewater, which was pretreated using a combination of powdered-activated carbon (PAC) adsorption and CFS (PAC/CFS). Steady flux was increased from 22.3 L/m2h for wastewater without pretreatment to 28.7 L/m2h with pretreatment; biodiesel wastewater quality also improved. Turbidity was reduced from 12 to 0.6 NTU, and COD was reduced from 526 to 4 mg/L after NF with PAC/CFS pretreatment, while COD was reduced from 526 to 95 mg/L using NF without pretreatment.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalJournal of Water Reuse and Desalination
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Mar 2017

Fingerprint

Nanofiltration membranes
Nanofiltration
Chemical oxygen demand
Wastewater
chemical oxygen demand
Flocculation
Turbidity
membrane
Coagulation
flocculation
Sedimentation
wastewater
coagulation
turbidity
sedimentation
Membrane fouling
Biofuels
Fluxes
Biodiesel
fouling

Keywords

  • CFS
  • Coagulation-flocculation-sedimentation
  • Nanofiltration
  • PAC adsorption
  • Pretreatment
  • Wastewater

ASJC Scopus subject areas

  • Water Science and Technology
  • Filtration and Separation

Cite this

The effect of wastewater pretreatment on nanofiltration membrane performance. / Hashlamon, Ali; Mohammad, Abdul Wahab; Ahmad, Akil.

In: Journal of Water Reuse and Desalination, Vol. 7, No. 1, 01.03.2017, p. 45-52.

Research output: Contribution to journalArticle

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