Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Nitrification cessation and recovery in an aerated saturated vertical subsurface flow treatment wetland: Field studies and microscale biofilm modeling
Autor Murphy, C.; Rajabzadeh, A.R.; Weber, K.P.; Nivala, J.; Wallace, S.D.; Cooper, D.J.;
Journal / Serie Bioresource Technology
Erscheinungsjahr 2016
Department UBZ;
Band/Volume 209
Sprache englisch;
POF III (gesamt) T34;
Keywords Aeration; Constructed wetland; Denitrification; Diffusion; Intensified wetland
UFZ Querschnittsthemen RU2;
Abstract In aerated treatment wetlands, oxygen availability is not a limiting factor in sustaining a high level of nitrification in wastewater treatment. In the case of an air blower failure, nitrification would cease, potentially causing adverse effects to the nitrifying bacteria. A field trial was completed investigating nitrification loss when aeration is switched off, and the system recovery rate after the aeration is switched back on. Loss of dissolved oxygen was observed to be more rapid than loss of nitrification. Nitrate was observed in the effluent long after the aeration was switched off (48 h+). A complementary modeling study predicted nitrate diffusion out of biofilm over a 48 h period. After two weeks of no aeration in the established system, nitrification recovered within two days, whereas nitrification establishment in a new system was previously observed to require 20–45 days. These results suggest that once established resident nitrifying microbial communities are quite robust.
ID 17354
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=17354
Murphy, C., Rajabzadeh, A.R., Weber, K.P., Nivala, J., Wallace, S.D., Cooper, D.J. (2016):
Nitrification cessation and recovery in an aerated saturated vertical subsurface flow treatment wetland: Field studies and microscale biofilm modeling
Bioresour. Technol. 209 , 125 - 132