Wastewater post-treatment for simultaneous ammonium removal and elemental sulfur recovery using a novel horizontal mixed aerobic anoxic fixed-bed reactor configuration

Autor(es)

Guerrero, R. B. S. ^[1] ; Zaiat, M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo EESC USP, Biol Proc Lab, Ctr Res Dev & Innovat Environm Engn, Sao Carlos Sch Engn, Ave Joao Dagnone 1100, BR-11563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Environmental Management; v. 215, p. 358-365, JUN 1 2018.
• Citações Web of Science: 4

Resumo

A novel horizontal mixed anoxic-aerobic fixed-bed reactor configuration based on nitrification coupled with autotrophic denitrification using hydrogen sulfide as an electron donor was developed. The nitrification removal efficiency (RE) reached values greater than 99% but was slightly affected by the accumulation of dissolved sulfur species in the liquid phase. The denitrification RE reached 99% with a H2S inlet load of 28.6 g S M-3 h(-1), although the use of aluminum polychloride (PAC) as a sulfur coagulant in the anoxic zone affected the buffering capacity of the system and resulted in a decrease in the RE. The performance of the reactor was primarily affected by the buffering capacity of the system, and this effect could be controlled with an increase in the NaHCO3 concentration. The recovery of biogenic elemental sulfur was possible using PAC as a coagulant, although the solid collected at the bottom of the settling tank contained only 1.5% S-0. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 15/18976-0 - Pós-tratamento de águas residuárias para remoção de compostos nitrogenados utilizando um reator misto horizontal anóxico-aeróbio alimentado com biogás e ar
• Beneficiário: Renata de Bello Solcia Guerrero
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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