Influence of the shear stress and salinity on Anammox biofilms formation: Modelling results

Isaac Fernández; J. I. Bravo; A. Mosquera-Corral; A. Pereira; J. L. Campos; R. Méndez; L. F. Melo

doi:10.1007/s00449-014-1171-z

Influence of the shear stress and salinity on Anammox biofilms formation: Modelling results

Isaac Fernández, J. I. Bravo, A. Mosquera-Corral, A. Pereira, J. L. Campos, R. Méndez, L. F. Melo

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Anammox biomass has a long duplication time and low yield, thus the process must be operated in reactors with good sludge retention, such as biofilm systems. Therefore, it would be important to research the ability of Anammox biomass to form biofilms under different conditions. The effects of shear stress and salinity (NaCl and CaCl₂) on Anammox biofilm formation were studied. Anammox bacteria showed good attachment capacity, with an initial adhesion phase lasting for 5-7 days at the different flow rates tested (Reynolds numbers 54, 63, 188 and 400). A four-parameter model was developed and the experimental data fitted well into the model. The presence of 5 g/L of each of the two salts favoured the formation of Anammox biofilm. The effects of CaCl₂ were stronger than those caused by NaCl. 15 g/L of NaCl was detrimental for the biofilm, probably due to an inhibitory effect.

Original language	English
Pages (from-to)	1955-1961
Number of pages	7
Journal	Bioprocess and Biosystems Engineering
Volume	37
Issue number	10
DOIs	https://doi.org/10.1007/s00449-014-1171-z
State	Published - 12 Sep 2014
Externally published	Yes

Keywords

Anammox
Attachment rate
Biofilms
Mathematical modelling
Shear stress

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title = "Influence of the shear stress and salinity on Anammox biofilms formation: Modelling results",

abstract = "Anammox biomass has a long duplication time and low yield, thus the process must be operated in reactors with good sludge retention, such as biofilm systems. Therefore, it would be important to research the ability of Anammox biomass to form biofilms under different conditions. The effects of shear stress and salinity (NaCl and CaCl2) on Anammox biofilm formation were studied. Anammox bacteria showed good attachment capacity, with an initial adhesion phase lasting for 5-7 days at the different flow rates tested (Reynolds numbers 54, 63, 188 and 400). A four-parameter model was developed and the experimental data fitted well into the model. The presence of 5 g/L of each of the two salts favoured the formation of Anammox biofilm. The effects of CaCl2 were stronger than those caused by NaCl. 15 g/L of NaCl was detrimental for the biofilm, probably due to an inhibitory effect.",

keywords = "Anammox, Attachment rate, Biofilms, Mathematical modelling, Shear stress",

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T1 - Influence of the shear stress and salinity on Anammox biofilms formation

T2 - Modelling results

AU - Fernández, Isaac

AU - Bravo, J. I.

AU - Mosquera-Corral, A.

AU - Pereira, A.

AU - Campos, J. L.

AU - Méndez, R.

AU - Melo, L. F.

PY - 2014/9/12

Y1 - 2014/9/12

N2 - Anammox biomass has a long duplication time and low yield, thus the process must be operated in reactors with good sludge retention, such as biofilm systems. Therefore, it would be important to research the ability of Anammox biomass to form biofilms under different conditions. The effects of shear stress and salinity (NaCl and CaCl2) on Anammox biofilm formation were studied. Anammox bacteria showed good attachment capacity, with an initial adhesion phase lasting for 5-7 days at the different flow rates tested (Reynolds numbers 54, 63, 188 and 400). A four-parameter model was developed and the experimental data fitted well into the model. The presence of 5 g/L of each of the two salts favoured the formation of Anammox biofilm. The effects of CaCl2 were stronger than those caused by NaCl. 15 g/L of NaCl was detrimental for the biofilm, probably due to an inhibitory effect.

AB - Anammox biomass has a long duplication time and low yield, thus the process must be operated in reactors with good sludge retention, such as biofilm systems. Therefore, it would be important to research the ability of Anammox biomass to form biofilms under different conditions. The effects of shear stress and salinity (NaCl and CaCl2) on Anammox biofilm formation were studied. Anammox bacteria showed good attachment capacity, with an initial adhesion phase lasting for 5-7 days at the different flow rates tested (Reynolds numbers 54, 63, 188 and 400). A four-parameter model was developed and the experimental data fitted well into the model. The presence of 5 g/L of each of the two salts favoured the formation of Anammox biofilm. The effects of CaCl2 were stronger than those caused by NaCl. 15 g/L of NaCl was detrimental for the biofilm, probably due to an inhibitory effect.

KW - Anammox

KW - Attachment rate

KW - Biofilms

KW - Mathematical modelling

KW - Shear stress

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SN - 1615-7591

VL - 37

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EP - 1961

JO - Bioprocess and Biosystems Engineering

JF - Bioprocess and Biosystems Engineering

IS - 10

ER -

Influence of the shear stress and salinity on Anammox biofilms formation: Modelling results

Abstract

Keywords

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