Evaluating the Effect of Biofilm Thickness on Nitrification in Moving Bed Biofilm Reactors.

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Evaluating the Effect of Biofilm Thickness on Nitrification in Moving Bed Biofilm Reactors. / Piculell, Maria; Welander, Pia; Jönsson, Karin; Welander, Thomas.

I: Environmental Technology, Nr. Online 21 August 2015, 2015, s. 1-28.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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Piculell, Maria ; Welander, Pia ; Jönsson, Karin ; Welander, Thomas. / Evaluating the Effect of Biofilm Thickness on Nitrification in Moving Bed Biofilm Reactors. I: Environmental Technology. 2015 ; Nr. Online 21 August 2015. s. 1-28.

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TY - JOUR

T1 - Evaluating the Effect of Biofilm Thickness on Nitrification in Moving Bed Biofilm Reactors.

AU - Piculell, Maria

AU - Welander, Pia

AU - Jönsson, Karin

AU - Welander, Thomas

PY - 2015

Y1 - 2015

N2 - This study evaluates the effect of biofilm thickness on the nitrifying activity in moving bed biofilm reactors (MBBRs) in a controlled environment. In-depth understanding of biofilm properties in MBBRs and their effect on the overall treatment efficiency compose the key to optimizing process stability and efficiency. However, evaluating biofilm properties in continuously operated MBBRs can be extremely challenging. This study uses a carrier design which enables comparison of four different biofilm thicknesses, in otherwise equally operated lab-scale MBBRs. The results show that, within the studied range (200-500 µm) and specific operation conditions, biofilm thickness alone had no significant effect on the overall ammonium removal. The nitrate production, however, decreased with a decreasing biofilm thickness, and the ratio between nitrite and ammonia oxidizing activity decreased both with increasing load and decreasing oxygen concentration for all thicknesses. The suggestion that nitratation is disfavored in thin biofilms is an interesting contribution to current research being performed on NOB inhibition for deammonification applications. By indicating that different groups of bacteria respond differently to biofilm thickness, this study accentuates the importance of further evaluation of these complex systems.

AB - This study evaluates the effect of biofilm thickness on the nitrifying activity in moving bed biofilm reactors (MBBRs) in a controlled environment. In-depth understanding of biofilm properties in MBBRs and their effect on the overall treatment efficiency compose the key to optimizing process stability and efficiency. However, evaluating biofilm properties in continuously operated MBBRs can be extremely challenging. This study uses a carrier design which enables comparison of four different biofilm thicknesses, in otherwise equally operated lab-scale MBBRs. The results show that, within the studied range (200-500 µm) and specific operation conditions, biofilm thickness alone had no significant effect on the overall ammonium removal. The nitrate production, however, decreased with a decreasing biofilm thickness, and the ratio between nitrite and ammonia oxidizing activity decreased both with increasing load and decreasing oxygen concentration for all thicknesses. The suggestion that nitratation is disfavored in thin biofilms is an interesting contribution to current research being performed on NOB inhibition for deammonification applications. By indicating that different groups of bacteria respond differently to biofilm thickness, this study accentuates the importance of further evaluation of these complex systems.

U2 - 10.1080/09593330.2015.1080308

DO - 10.1080/09593330.2015.1080308

M3 - Article

SP - 1

EP - 28

JO - Environmental Technology (United Kingdom)

JF - Environmental Technology (United Kingdom)

SN - 1479-487X

IS - Online 21 August 2015

ER -