Establishing simultaneous nitrification and denitrification under continuous aeration for the treatment of multi-electrolytes saline wastewater

Autor(es)

Macedo, Williane Vieira ^[1] ; Santos, Carla E. D. ^[1] ; Solcia Guerrero, Renata de Bello ^[1] ; Sakamoto, Isabel K. ^[1] ; Cavalcante de Amorim, Eduardo Lucena ^[2] ; Azevedo, Eduardo Bessa ^[3] ; Damianovic, Marcia Helena R. Z. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Biol Proc Lab LPB, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil

^[2] Univ Fed Alagoas, Technol Ctr, Av Lourival Melo Mota, BR-57072900 Maceio, AL - Brazil

^[3] Univ Sao Paulo, Environm Technol Dev Lab LTDAmb, 400 Trab Sao Carlense Ave, BR-13563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 288, SEP 2019.
• Citações Web of Science: 2

Resumo

Simultaneous nitrification and denitrification (SND) was established under continuous aeration (6 mgO(2) L-1) aiming at achieving a feasible and simple operational strategy for treating multi-electrolyte saline wastewaters. Two Structured Fixed-Bed Reactors (SFBR) were used to assess SND performance with (Saline Reactor, SR) and without (Control Reactor, CR) salinity interference. Salinity was gradually increased (from 1.7 to 9 atm) based on the composition of water supplied in arid regions of Brazil. At 1.7 atm, N-NH4+ oxidation and Total Nitrogen (TN) removal efficiencies of 95.9 +/- 2.8 and 65.76 +/- 7.5%, respectively, were obtained. M osmotic pressure (OP) of 9 atm, the system was severely affected by specific salt toxicity and OP. High chemical oxygen demand (COD) removal efficiency was achieved at all operational conditions (97.2 +/- 1.6 to 78.5 +/- 4.6%). Salinity did not affect microbial diversity, although it modified microbial structure. Halotolerant genera were identified (Prosthecobacter, Chlamydia, Microbacterium, and Paenibacillus). (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