Dewatering of sewage for nutrients and water recovery by Forward Osmosis (FO)using divalent draw solution

N. Singh, S. Dhiman, S. Basu*, M. Balakrishnan, I. Petrinic, Claus Helix-Nielsen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Forward osmosis (FO), based on the phenomenon of osmosis, is a breakthrough technology for concentrating different feeds including domestic sewage. Globally, sewage treatment facilities are increasingly focusing on recovery of resources such as water, nutrients (nitrogen and phosphorus)and energy from sludge. In this context, FO can be applied for sewage up-concentration followed by nutrients recovery from the concentrated stream. Using biomimetic aquaporin membranes (thin film composite FO membranes incorporating aquaporin proteins), this work investigated divalent magnesium chloride as draw solution for sewage concentration. The effect of crossflow velocity and draw concentration on water recovery, rejection of organics and nutrients and membrane fouling was studied. Higher draw solution concentration and cross flow velocity enhanced water recovery but concentration of organics (as chemical oxygen demand, COD)remained unaffected. Over 24 h, an average water flux of 5.3 L/m 2 h was obtained with recovery of water (57%), phosphate (75%), ammonia (66%)and organics (73%). Membrane fouling was confirmed by zeta potential and ATR-FTIR analysis. Membrane cleaning was required after every 24 h cycle to restore the performance. The findings indicate that sewage concentration by FO with divalent magnesium chloride draw solution is promising for water and nutrients recovery.

Original languageEnglish
Article number100853
JournalJournal of Water Process Engineering
Volume31
ISSN2214-7144
DOIs
Publication statusPublished - 2019

Keywords

  • Aquaporin membranes
  • Domestic sewage
  • Forward Osmosis
  • Membrane reusability
  • Water and nutrient recovery

Cite this

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title = "Dewatering of sewage for nutrients and water recovery by Forward Osmosis (FO)using divalent draw solution",
abstract = "Forward osmosis (FO), based on the phenomenon of osmosis, is a breakthrough technology for concentrating different feeds including domestic sewage. Globally, sewage treatment facilities are increasingly focusing on recovery of resources such as water, nutrients (nitrogen and phosphorus)and energy from sludge. In this context, FO can be applied for sewage up-concentration followed by nutrients recovery from the concentrated stream. Using biomimetic aquaporin membranes (thin film composite FO membranes incorporating aquaporin proteins), this work investigated divalent magnesium chloride as draw solution for sewage concentration. The effect of crossflow velocity and draw concentration on water recovery, rejection of organics and nutrients and membrane fouling was studied. Higher draw solution concentration and cross flow velocity enhanced water recovery but concentration of organics (as chemical oxygen demand, COD)remained unaffected. Over 24 h, an average water flux of 5.3 L/m 2 h was obtained with recovery of water (57{\%}), phosphate (75{\%}), ammonia (66{\%})and organics (73{\%}). Membrane fouling was confirmed by zeta potential and ATR-FTIR analysis. Membrane cleaning was required after every 24 h cycle to restore the performance. The findings indicate that sewage concentration by FO with divalent magnesium chloride draw solution is promising for water and nutrients recovery.",
keywords = "Aquaporin membranes, Domestic sewage, Forward Osmosis, Membrane reusability, Water and nutrient recovery",
author = "N. Singh and S. Dhiman and S. Basu and M. Balakrishnan and I. Petrinic and Claus Helix-Nielsen",
year = "2019",
doi = "10.1016/j.jwpe.2019.100853",
language = "English",
volume = "31",
journal = "Journal of Water Process Engineering",
issn = "2214-7144",
publisher = "Elsevier",

}

Dewatering of sewage for nutrients and water recovery by Forward Osmosis (FO)using divalent draw solution. / Singh, N.; Dhiman, S.; Basu, S.; Balakrishnan, M.; Petrinic, I.; Helix-Nielsen, Claus.

In: Journal of Water Process Engineering, Vol. 31, 100853, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Dewatering of sewage for nutrients and water recovery by Forward Osmosis (FO)using divalent draw solution

AU - Singh, N.

AU - Dhiman, S.

AU - Basu, S.

AU - Balakrishnan, M.

AU - Petrinic, I.

AU - Helix-Nielsen, Claus

PY - 2019

Y1 - 2019

N2 - Forward osmosis (FO), based on the phenomenon of osmosis, is a breakthrough technology for concentrating different feeds including domestic sewage. Globally, sewage treatment facilities are increasingly focusing on recovery of resources such as water, nutrients (nitrogen and phosphorus)and energy from sludge. In this context, FO can be applied for sewage up-concentration followed by nutrients recovery from the concentrated stream. Using biomimetic aquaporin membranes (thin film composite FO membranes incorporating aquaporin proteins), this work investigated divalent magnesium chloride as draw solution for sewage concentration. The effect of crossflow velocity and draw concentration on water recovery, rejection of organics and nutrients and membrane fouling was studied. Higher draw solution concentration and cross flow velocity enhanced water recovery but concentration of organics (as chemical oxygen demand, COD)remained unaffected. Over 24 h, an average water flux of 5.3 L/m 2 h was obtained with recovery of water (57%), phosphate (75%), ammonia (66%)and organics (73%). Membrane fouling was confirmed by zeta potential and ATR-FTIR analysis. Membrane cleaning was required after every 24 h cycle to restore the performance. The findings indicate that sewage concentration by FO with divalent magnesium chloride draw solution is promising for water and nutrients recovery.

AB - Forward osmosis (FO), based on the phenomenon of osmosis, is a breakthrough technology for concentrating different feeds including domestic sewage. Globally, sewage treatment facilities are increasingly focusing on recovery of resources such as water, nutrients (nitrogen and phosphorus)and energy from sludge. In this context, FO can be applied for sewage up-concentration followed by nutrients recovery from the concentrated stream. Using biomimetic aquaporin membranes (thin film composite FO membranes incorporating aquaporin proteins), this work investigated divalent magnesium chloride as draw solution for sewage concentration. The effect of crossflow velocity and draw concentration on water recovery, rejection of organics and nutrients and membrane fouling was studied. Higher draw solution concentration and cross flow velocity enhanced water recovery but concentration of organics (as chemical oxygen demand, COD)remained unaffected. Over 24 h, an average water flux of 5.3 L/m 2 h was obtained with recovery of water (57%), phosphate (75%), ammonia (66%)and organics (73%). Membrane fouling was confirmed by zeta potential and ATR-FTIR analysis. Membrane cleaning was required after every 24 h cycle to restore the performance. The findings indicate that sewage concentration by FO with divalent magnesium chloride draw solution is promising for water and nutrients recovery.

KW - Aquaporin membranes

KW - Domestic sewage

KW - Forward Osmosis

KW - Membrane reusability

KW - Water and nutrient recovery

U2 - 10.1016/j.jwpe.2019.100853

DO - 10.1016/j.jwpe.2019.100853

M3 - Journal article

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JO - Journal of Water Process Engineering

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SN - 2214-7144

M1 - 100853

ER -