| Registro completo |
| Provedor de dados: |
REA
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| País: |
Brazil
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| Título: |
SWINE WASTEWATER NITROGEN REMOVAL AT DIFFERENT C/N RATIOS USING THE MODIFIED LUDZACK-ETTINGER PROCESS
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| Autores: |
Giongo,Adelcio
Bortoli,Marcelo
Prá,Marina Celant De
Veruck,Marcos
Kunz,Airton
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| Data: |
2018-12-01
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| Ano: |
2018
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| Palavras-chave: |
Nitritation/denitritation
Nitrification/denitrification
Biological nitrogen removal
Total organic carbon consumption
Animal production wastewater
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| Resumo: |
ABSTRACT The swine industry has been presented strong growth and thus is producing large volumes of effluents that must be correctly management. Nitritation/denitritation process can be used to improve system performance, saving the energy cost with aeration and with the external source of carbon due to the lower C/N requirement. The aim of this study was to evaluate swine wastewater Nitrification/Denitrification (NDF) and Nitritation/denitritation (NDT) processes at different C/N ratios, using the Modified Ludzack-Ettinger (MLE) process, in order to obtain a system with efficient nitrogen removal and low oxygen and carbon consumption. Four phases were conducted during the experiment: Phase I) DO between 2.0-3.0 mg L−1 of O2 and C/N 1.5 (NDF); Phase II) DO between 0.6-0.7 mg L−1 of O2 and C/N 1.5 (NDT); Phase III) DO between 0.6-0.7 mg L−1 of O2, C / N ratios of1.5, 0.9, 0.75 and 0.6 (NDT); Phase IV) DO between 2.0-3.0 mg L−1 of O2, C/N ratios of 1.5, 0.9, 0.75, and 0.6 (NDF). The best operational condition was found in the C / N ratio of 0.9 (Phase III) obtaining an optimum N removal of 86.3%. In this condition, the system saved around 26.8% in total organic carbon consumption and operated at conditions of 74% lower dissolved oxygen when compared to conventional process for N-removal. This strategy can be very useful for nitrogen removal for low carbon swine wastewater as digestate from anaerobic processes.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600968
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| Editor: |
Associação Brasileira de Engenharia Agrícola
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| Relação: |
10.1590/1809-4430-eng.agric.v38n6p968-977/2018
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| Formato: |
text/html
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| Fonte: |
Engenharia Agrícola v.38 n.6 2018
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| Direitos: |
info:eu-repo/semantics/openAccess
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