TY - JOUR
T1 - Removal of COD and nitrogen from animal food plant wastewater in an intermittently-aerated structured-bed reactor
AU - Wosiack, Priscila Arcoverde
AU - Lopes, Deize Dias
AU - Rissato Zamariolli Damianovic, Márcia Helena
AU - Foresti, Eugenio
AU - Granato, Daniel
AU - Barana, Ana Cláudia
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - This study evaluated the performance of a continuous flow structured-bed reactor in the simultaneous removal of total nitrogen (TN) and chemical oxygen demand (COD) in the effluent from an animal food plant. The reactor had an intermittent aeration system; hydraulic retention time (HRT) of one day; temperature of 30°C; and recirculation ratio of five times the flow. An experimental central composite rotational delineation (CCRD) type design was used to define the aeration conditions and nitrogen load (factors) to be studied. Response surface methodology was used to analyse the influence of the factors above the results, the removal of TN and COD. It was observed that the aeration factor showed the greatest significance for the results and that the affluent TKN concentration did not have a significant effect, at a 95% level of confidence, on COD removal. Throughout the experiment, the COD/N ratio remained between 3.2 and 3.8. The best results for COD and TN removal, 80% and 88%, respectively, were obtained with 158min of aeration on a cycle of 180min and 255mgL-1 of Total Kjeldahl Nitrogen (TKN) in the substrate.
AB - This study evaluated the performance of a continuous flow structured-bed reactor in the simultaneous removal of total nitrogen (TN) and chemical oxygen demand (COD) in the effluent from an animal food plant. The reactor had an intermittent aeration system; hydraulic retention time (HRT) of one day; temperature of 30°C; and recirculation ratio of five times the flow. An experimental central composite rotational delineation (CCRD) type design was used to define the aeration conditions and nitrogen load (factors) to be studied. Response surface methodology was used to analyse the influence of the factors above the results, the removal of TN and COD. It was observed that the aeration factor showed the greatest significance for the results and that the affluent TKN concentration did not have a significant effect, at a 95% level of confidence, on COD removal. Throughout the experiment, the COD/N ratio remained between 3.2 and 3.8. The best results for COD and TN removal, 80% and 88%, respectively, were obtained with 158min of aeration on a cycle of 180min and 255mgL-1 of Total Kjeldahl Nitrogen (TKN) in the substrate.
KW - Biological reactor
KW - Denitrification
KW - Nitrification
KW - Removal of carbon
KW - Removal of nitrogen
UR - http://www.scopus.com/inward/record.url?scp=84923227622&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2015.02.026
DO - 10.1016/j.jenvman.2015.02.026
M3 - Article
C2 - 25725386
AN - SCOPUS:84923227622
SN - 0301-4797
VL - 154
SP - 145
EP - 150
JO - Journal of Environmental Management
JF - Journal of Environmental Management
ER -
