Remoção de nitrogênio de esgoto sanitário em reator de leito estruturado operado com diferentes ciclos de aeração intermitente

Camila Zoe Correa, Camila Souza Azevedo, Deize Dias Lopes, Kátia Valeria Marques Cardoso Prates, Ana Claudia Barana

Resumo


O principal objetivo deste trabalho foi avaliar a eficiência de remoção de nitrogênio de esgoto sanitário em um reator de leito estruturado submetido a diferentes ciclos de aeração intermitente (AI). Foram estudados 2 ciclos de AI: ciclo I (2h aeração ligada (AE)/ 1h aeração desligada (AN)) e ciclo II (2h AE/ 2h AN. No ciclo I foi obtido 80±15% de remoção de NKT, 86±15% de N-NH4+ e 68±9% de remoção de Nitrogênio Total (NT) e no Ciclo II de 58±20%, 72±28% e 41±6% de remoção de NKT, N-NH4+ e NT, respectivamente. A eficiência de desnitrificação nos 2 ciclos foi acima de 70%, indicando que no reator ocorreu o processo de Nitrificação e Desnitrificação Simultânea (NDS). Dos resultados conclui-se que o sistema trabalhado foi eficiente em termos de remoção de nitrogênio, e que a fase que apresentou a maior disponibilidade de Oxigênio Dissolvido (OD) e relação C/N (Ciclo I), foi a que obteve as menores concentrações efluentes de N-NH4+.

Palavras-chave


nitrificação, desnitrificação e material suporte.

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Direitos autorais 2019 Cadernos Zygmunt Bauman

ISSN 2236-4099