TY - JOUR
T1 - Nitrogen elimination mechanisms in an organic media aerated biofilter treating pig manure
AU - Garzón-Zúñiga, M.
AU - Lessard, P.
AU - Aubry, P.
AU - Buelna, G.
N1 - Funding Information:
The Ministry of Education of Quebec (MEQ), the NSERC (Canada), the CRIQ (Canada) and the Mexican Council of Science and Technology (CONACyT) are acknowledged for their financial support.
PY - 2005/4
Y1 - 2005/4
N2 - Biofilters using organic media are known to procure efficient treatment for different types of wastewater, but the nitrogen removal pathways implied are still not well understood. In this study, a lab-scale aerated biofilter using peat and treating pig manure was operated for 180 days, in order to quantify the nitrogen transformations occurring in it. It was shown that stripping was important during the start-up, until nitrification took place. Simultaneous nitrification and denitrification, proved by N2 production, became the principal mechanism after some time. The production of N2O did not seem to come only from heterotrophic denitrification, but also from chemodenitrification and autotrophic denitrification. It has also been found that part of the influent nitrogen was retained in the system during the first 150 days, due to filtration, sorption and assimilation. During the last periods of operation, the nitrogen previously retained has been used by microorganisms, leading to an excessive N2 discharge.
AB - Biofilters using organic media are known to procure efficient treatment for different types of wastewater, but the nitrogen removal pathways implied are still not well understood. In this study, a lab-scale aerated biofilter using peat and treating pig manure was operated for 180 days, in order to quantify the nitrogen transformations occurring in it. It was shown that stripping was important during the start-up, until nitrification took place. Simultaneous nitrification and denitrification, proved by N2 production, became the principal mechanism after some time. The production of N2O did not seem to come only from heterotrophic denitrification, but also from chemodenitrification and autotrophic denitrification. It has also been found that part of the influent nitrogen was retained in the system during the first 150 days, due to filtration, sorption and assimilation. During the last periods of operation, the nitrogen previously retained has been used by microorganisms, leading to an excessive N2 discharge.
KW - Biofilter
KW - Chemodenitrification
KW - Nitrogen
KW - Organic media
KW - Pig manure
UR - http://www.scopus.com/inward/record.url?scp=19944361852&partnerID=8YFLogxK
U2 - 10.1080/09593332608618552
DO - 10.1080/09593332608618552
M3 - Artículo
SN - 0959-3330
VL - 26
SP - 361
EP - 372
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
IS - 4
ER -