Nitrification in saline wastewater with high ammonia concentration in an activated sludge unit

J. L. Campos; A. Mosquera-Corral; M. Sánchez; R. Méndez; J. M. Lema

doi:10.1016/S0043-1354(01)00467-5

Nitrification in saline wastewater with high ammonia concentration in an activated sludge unit

J. L. Campos, A. Mosquera-Corral, M. Sánchez, R. Méndez, J. M. Lema

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160 Scopus citations

Abstract

A nitrifying activated sludge reactor fed with a high salinity medium was operated efficiently at ammonia loading rates between 1 and 4g NH₄⁺-Nl^-1d^-1. The system became completely inefficient at inlet salt concentrations higher than 525mM due to the mixed inhibition effect of salts and ammonia. The final product was mainly nitrate although dissolved oxygen limitations caused sporadic ammonia and nitrite accumulations. Specific nitrifying activity decreased due to the saline effect. A set of activity tests showed that in the continuous reactor non-adapted biomass is rather more sensitive than biomass to the saline effect. Physical properties of biomass in the reactor (sludge volumetric index and zone settling velocity) were not affected by the saline concentration, a biomass concentration of 20gVSSl^-1 was achieved.

Original language	English
Pages (from-to)	2555-2560
Number of pages	6
Journal	Water Research
Volume	36
Issue number	10
DOIs	https://doi.org/10.1016/S0043-1354(01)00467-5
State	Published - 2002
Externally published	Yes

Keywords

Activated sludge
High ammonia concentration
Nitrification
Saline effect

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10.1016/S0043-1354(01)00467-5

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title = "Nitrification in saline wastewater with high ammonia concentration in an activated sludge unit",

abstract = "A nitrifying activated sludge reactor fed with a high salinity medium was operated efficiently at ammonia loading rates between 1 and 4g NH4+-Nl-1d-1. The system became completely inefficient at inlet salt concentrations higher than 525mM due to the mixed inhibition effect of salts and ammonia. The final product was mainly nitrate although dissolved oxygen limitations caused sporadic ammonia and nitrite accumulations. Specific nitrifying activity decreased due to the saline effect. A set of activity tests showed that in the continuous reactor non-adapted biomass is rather more sensitive than biomass to the saline effect. Physical properties of biomass in the reactor (sludge volumetric index and zone settling velocity) were not affected by the saline concentration, a biomass concentration of 20gVSSl-1 was achieved.",

keywords = "Activated sludge, High ammonia concentration, Nitrification, Saline effect",

author = "Campos, {J. L.} and A. Mosquera-Corral and M. S{\'a}nchez and R. M{\'e}ndez and Lema, {J. M.}",

note = "Funding Information: This work was funded by the Spanish Commission of Science and Technology CICYT (Project AMB98-0658) and by the European Union (Contract FMRX-CT97-0114). We are also grateful to the Instituto de Cooperaci{\'o}n Iberoamericano (ICI) and to the Spanish MEC. ",

year = "2002",

doi = "10.1016/S0043-1354(01)00467-5",

language = "English",

volume = "36",

pages = "2555--2560",

journal = "Water Research",

issn = "0043-1354",

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TY - JOUR

T1 - Nitrification in saline wastewater with high ammonia concentration in an activated sludge unit

AU - Campos, J. L.

AU - Mosquera-Corral, A.

AU - Sánchez, M.

AU - Méndez, R.

AU - Lema, J. M.

N1 - Funding Information: This work was funded by the Spanish Commission of Science and Technology CICYT (Project AMB98-0658) and by the European Union (Contract FMRX-CT97-0114). We are also grateful to the Instituto de Cooperación Iberoamericano (ICI) and to the Spanish MEC.

PY - 2002

Y1 - 2002

N2 - A nitrifying activated sludge reactor fed with a high salinity medium was operated efficiently at ammonia loading rates between 1 and 4g NH4+-Nl-1d-1. The system became completely inefficient at inlet salt concentrations higher than 525mM due to the mixed inhibition effect of salts and ammonia. The final product was mainly nitrate although dissolved oxygen limitations caused sporadic ammonia and nitrite accumulations. Specific nitrifying activity decreased due to the saline effect. A set of activity tests showed that in the continuous reactor non-adapted biomass is rather more sensitive than biomass to the saline effect. Physical properties of biomass in the reactor (sludge volumetric index and zone settling velocity) were not affected by the saline concentration, a biomass concentration of 20gVSSl-1 was achieved.

AB - A nitrifying activated sludge reactor fed with a high salinity medium was operated efficiently at ammonia loading rates between 1 and 4g NH4+-Nl-1d-1. The system became completely inefficient at inlet salt concentrations higher than 525mM due to the mixed inhibition effect of salts and ammonia. The final product was mainly nitrate although dissolved oxygen limitations caused sporadic ammonia and nitrite accumulations. Specific nitrifying activity decreased due to the saline effect. A set of activity tests showed that in the continuous reactor non-adapted biomass is rather more sensitive than biomass to the saline effect. Physical properties of biomass in the reactor (sludge volumetric index and zone settling velocity) were not affected by the saline concentration, a biomass concentration of 20gVSSl-1 was achieved.

KW - Activated sludge

KW - High ammonia concentration

KW - Nitrification

KW - Saline effect

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U2 - 10.1016/S0043-1354(01)00467-5

DO - 10.1016/S0043-1354(01)00467-5

M3 - Article

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AN - SCOPUS:0035988040

SN - 0043-1354

VL - 36

SP - 2555

EP - 2560

JO - Water Research

JF - Water Research

IS - 10

ER -

Nitrification in saline wastewater with high ammonia concentration in an activated sludge unit

Abstract

Keywords

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