Co-treatment of landfill leachate and domestic wastewater using a submerged aerobic biofilter

Autor(es)

Ferraz, F. M. ^[1] ; Povinelli, J. ^[1] ; Pozzi, E. ^[1] ; Vieira, E. M. ^[2] ; Trofino, J. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hidraul & Saneamento, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Environmental Management; v. 141, p. 9-15, AUG 1 2014.
• Citações Web of Science: 19

Resumo

This study used a pilot-scale submerged aerobic biofilter (SAB) to evaluate the co-treatment of domestic wastewater and landfill leachate that was pre-treated by air stripping. The leachate tested volumetric ratios were 0, 2, and 5%. At a hydraulic retention time of 24 h, the SAB was best operated with a volumetric ratio of 2% and removed 98% of the biochemical oxygen demand (BUD), 80% of the chemical oxygen demand (COD) and dissolved organic carbon (DOC), and 90% of the total suspended solids (TSS). A proposed method, which we called the ``equivalent in humic acid{''} (Eq.HA) approach, indicated that the hardly biodegradable organic matter in leachate was removed by partial degradation (71% of DOC Eq.HA removal). Adding leachate at a volumetric ratio of 5%, the concentration of the hardly biodegradable organic matter was decreased primarily as a result of dilution rather than biodegradation, which was confirmed by Fourier transform infrared (FTIR) spectroscopy. The total ammoniacal nitrogen (TAN) was mostly removed (90%) by nitrification, and the SAB performances at the volumetric ratios of 0 and 2% were equal. For the three tested volumetric ratios of leachate (0, 2, and 5%), the concentrations of heavy metals in the treated samples were below the local limits. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/50627-4 - Estudo de tratabilidade de lixiviados de aterros sanitarios - enfase no tratamento consorciado com esgoto sanitario em sistemas aerobios.
• Beneficiário: Fernanda de Matos Ferraz
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 10/51955-2 - Estudo de tratabilidade de lixiviados de aterros sanitários: ênfase no tratamento consorciado com esgoto sanitário em sistemas aeróbios
• Beneficiário: Jurandyr Povinelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular