Nitrogen removal by simultaneous partial nitrification, anammox and denitrification (SNAD) in a structured-bed reactor treating animal feed processing wastewater: Inhibitory effects and bacterial community

Autor(es):Mostrar menos -

Bandeira de Almeida, Ricardo Gabriel ^[1] ; Diniz dos Santos, Carla Eloisa ^[1] ; Luders, Taissa Colucio ^[1] ; Del Nery, Valeria ^[1] ; Leal, Cintia Dutra ^[2] ; Pereira, Alyne Duarte ^[2] ; Araujo, Juliana Calabria ^[2] ; Davenport, Russel J. ^[3] ; Barana, Ana Claudia ^[4] ; Lopes, Deize Dias ^[5] ; Rissato Zamariolli Damianovic, Marcia Helena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Ctr Res Dev & Innovat Environm Engn, Lab Biol Proc, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP - Brazil

^[2] Fed Univ Minas Gerais UFMG, Dept Sanit & Environm Engn, Av Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG - Brazil

^[3] Newcastle Univ, Sch Civil Engn & Geosci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear - England

^[4] Univ Estadual Ponta Grossa, Dept Food Engn, Av Gal Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa, PR - Brazil

^[5] Univ Estadual Londrina, Dept Civil Engn, Rod Celso Garcia Cid, Km 380, BR-86051991 Londrina, PR - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: INTERNATIONAL BIODETERIORATION & BIODEGRADATION; v. 133, p. 108-115, SEP 2018.
• Citações Web of Science: 5

Resumo

The aim of this study was to investigate the post-treatment of UASB effluent by treating animal feed production wastewater using simultaneous partial nitrification, anammox and denitrification (SNAD) in a structured-bed reactor subjected to low aeration and recirculation. The average nitrogen loads applied were 0.307, 0.249 and 0.149 kgN m(-3)d(-1), correlated to COD/N ratios of 0.28, 0.41 and 0.26 (Phases 1, 2 and 3, respectively). The best mean values for removal efficiencies of total-N and COD were obtained in Phase 1 with 48 +/- 24% and 63 +/- 20%, respectively, reaching a maximum total-N removal efficiency of 79%. The anammox process was the main pathway of nitrogen removal, as pointed out in the nitrogen mass balance. High free ammonia (FA) concentrations in Phases 2 and 3, associated to the limitation of oxygen supply, caused inhibition of nitrite oxidizing bacteria (NOB) activity, leading to NO2 accumulation, having an impact on the denitrifying activity. At the end of the operational period, sequencing analysis detected sequences related to heterotrophic denitrifiers (22.5%), anammox bacteria, Candidatus Anarnmoximicrobium (2%) and ammonia oxidizing bacteria (AOB) belonging to Nitrosomonadales and Nitrosomonas (0.6%). These results demonstrated that nitritation, denitrification and anammox were likely in the processes involved in nitrogen removal in this reactor. (AU)

• Processo FAPESP: 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático