Artigo
The chemical oxygen demand / total volatile acids ratio as an anaerobic treatability indicator for landfill leachates
Registro en:
Brazilian Journal of Chemical Engineering, v. 32, n. 1, p. 73-86, 2015.
0104-6632
ISSN0104-6632-2015-32-01-73-86.pdf
9415339655312598
Autor
Contrera, Ronan Cleber
Silva, Kátia Cristina da Cruz
Silva, Gustavo Henrique Ribeiro da [UNESP]
Morita, Dione Mari
Zaiat, Marcelo
Schalch, Valdir
Resumen
In some operational circumstances a fast evaluation of landfill leachate anaerobic treatability is necessary, and neither Biochemical Methane Potential nor BOD/COD ratio are fast enough. Looking for a fast indicator, this work evaluated the anaerobic treatability of landfill leachate from São Carlos-SP (Brazil) in a pilot scale Anaerobic Sequence Batch Biofilm Reactor (AnSBBR). The experiment was conducted at ambient temperature in the landfill area. After the acclimation, at a second stage of operation, the AnSBBR presented efficiency above 70%, in terms of COD removal, utilizing landfill leachate without water dilution, with an inlet COD of about 11,000 mg.L-1, a TVA/COD ratio of approximately 0.6 and reaction time equal to 7 days. To evaluate the landfill leachate biodegradability variation over time, temporal profiles of concentration were performed in the AnSBBR. The landfill leachate anaerobic biodegradability was verified to have a direct and strong relationship to the TVA/COD ratio. For a TVA/CODTotal ratio lower than 0.20, the biodegradability was considered low, for ratios between 0.20 and 0.40 it was considered medium, and above 0.40 it was considered high. Departamento de Engenharia Hidráulica e Ambiental (PHA), Escola Politécnica (EP), Universidade de São Paulo (USP), Avenida Prof. Almeida Prado 83, Trav. 2, Cidade Universitária, CEP: 05508-900, São Paulo - SP, Brazil. Phone: + (55) (11) 3091 1897, + (55) (11) 3091 5396 Departamento de Engenharia Civil (DEC), Universidade Estadual Paulista "Julio de Mesquita Filho" (UNESP) Campus de Bauru, Av. Luiz Edmundo Carrijo Coube 14-01, Vargem Limpa, CEP: 17033-360, Bauru - SP, Brazil Laboratório de Processos Biológicos (LPB), Departamento de Hidráulica e Saneamento (SHS), Escola de Engenharia de São Carlos (EESC), Universidade de São Paulo (USP), Engenharia Ambiental, Bloco 4-F, Av. João Dagnone 1100, Santa Angelina, CEP: 13.563-120, São Carlos - SP, Brazil Departamento de Hidráulica e Saneamento (SHS), Escola de Engenharia de São Carlos (EESC), Universidade de São Paulo (USP), Avenida Trabalhador São-Carlense 400, Centro, CEP: 13566-590, São Carlos - SP, Brazil Departamento de Engenharia Civil (DEC), Universidade Estadual Paulista "Julio de Mesquita Filho" (UNESP) Campus de Bauru, Av. Luiz Edmundo Carrijo Coube 14-01, Vargem Limpa, CEP: 17033-360, Bauru - SP, Brazil. E-mail: gustavoribeiro@feb.unesp.br