Removal of nitrate from water in a novel ion exchange membrane bioreactor

S. Velizarov; J. G. Crespo; M. A. Reis

Removal of nitrate from water in a novel ion exchange membrane bioreactor

Research output: Contribution to journal › Conference article › peer-review

Abstract

Biological denitrification in a novel ion exchange membrane reactor (IEMB) has been investigated. The polluted water was separated from the mixed denitrifying culture by a non-porous, mono-anion permselective membrane providing continuous exchange of nitrate for chloride added as a counter-ion to the biocompartment. A removal efficiency of 87% and a surface removal rate of about 1,400 mg NO₃^-m^-2h^-1 was achieved at a nitrate concentration of 150 mg NO₃^-L^-1. The treated water stream was essentially free of ethanol, used as a carbon source, and NO₂^- ions whereas the original water conductivity was completely preserved due to very efficient Donnan exclusion of the cations present in the two solutions from the membrane used. The IEMB process showed higher removal efficiency and better nitrate selectivity compared to a Donnan dialysis process operated under similar conditions.

Original language	English
Pages (from-to)	161-167
Number of pages	7
Journal	Water Science and Technology: Water Supply
Volume	2
Issue number	2
Publication status	Published - 2002
Event	2nd World Water Congress of the International Water Association - Berlin, Germany Duration: 15 Oct 2001 → 19 Oct 2001

Keywords

Donnan dialysis
Drinking water denitrification
Ion exchange membrane bioreactor

Cite this

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title = "Removal of nitrate from water in a novel ion exchange membrane bioreactor",

abstract = "Biological denitrification in a novel ion exchange membrane reactor (IEMB) has been investigated. The polluted water was separated from the mixed denitrifying culture by a non-porous, mono-anion permselective membrane providing continuous exchange of nitrate for chloride added as a counter-ion to the biocompartment. A removal efficiency of 87% and a surface removal rate of about 1,400 mg NO3-m-2h-1 was achieved at a nitrate concentration of 150 mg NO3-L-1. The treated water stream was essentially free of ethanol, used as a carbon source, and NO2- ions whereas the original water conductivity was completely preserved due to very efficient Donnan exclusion of the cations present in the two solutions from the membrane used. The IEMB process showed higher removal efficiency and better nitrate selectivity compared to a Donnan dialysis process operated under similar conditions.",

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author = "S. Velizarov and Crespo, {J. G.} and Reis, {M. A.}",

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volume = "2",

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journal = "Water Science and Technology: Water Supply",

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note = "2nd World Water Congress of the International Water Association ; Conference date: 15-10-2001 Through 19-10-2001",

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TY - JOUR

T1 - Removal of nitrate from water in a novel ion exchange membrane bioreactor

AU - Velizarov, S.

AU - Crespo, J. G.

AU - Reis, M. A.

PY - 2002

Y1 - 2002

N2 - Biological denitrification in a novel ion exchange membrane reactor (IEMB) has been investigated. The polluted water was separated from the mixed denitrifying culture by a non-porous, mono-anion permselective membrane providing continuous exchange of nitrate for chloride added as a counter-ion to the biocompartment. A removal efficiency of 87% and a surface removal rate of about 1,400 mg NO3-m-2h-1 was achieved at a nitrate concentration of 150 mg NO3-L-1. The treated water stream was essentially free of ethanol, used as a carbon source, and NO2- ions whereas the original water conductivity was completely preserved due to very efficient Donnan exclusion of the cations present in the two solutions from the membrane used. The IEMB process showed higher removal efficiency and better nitrate selectivity compared to a Donnan dialysis process operated under similar conditions.

AB - Biological denitrification in a novel ion exchange membrane reactor (IEMB) has been investigated. The polluted water was separated from the mixed denitrifying culture by a non-porous, mono-anion permselective membrane providing continuous exchange of nitrate for chloride added as a counter-ion to the biocompartment. A removal efficiency of 87% and a surface removal rate of about 1,400 mg NO3-m-2h-1 was achieved at a nitrate concentration of 150 mg NO3-L-1. The treated water stream was essentially free of ethanol, used as a carbon source, and NO2- ions whereas the original water conductivity was completely preserved due to very efficient Donnan exclusion of the cations present in the two solutions from the membrane used. The IEMB process showed higher removal efficiency and better nitrate selectivity compared to a Donnan dialysis process operated under similar conditions.

KW - Donnan dialysis

KW - Drinking water denitrification

KW - Ion exchange membrane bioreactor

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M3 - Conference article

AN - SCOPUS:0036096878

SN - 1606-9749

VL - 2

SP - 161

EP - 167

JO - Water Science and Technology: Water Supply

JF - Water Science and Technology: Water Supply

IS - 2

T2 - 2nd World Water Congress of the International Water Association

Y2 - 15 October 2001 through 19 October 2001

ER -

Removal of nitrate from water in a novel ion exchange membrane bioreactor

Abstract

Keywords

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