Co-treatment of landfill leachate and domestic wastewater using a submerged aerobic biofilter
| Autor: | Fernanda M. Ferraz, Jurandyr Povinelli, Eny Maria Vieira, J.C. Trofino, Eloisa Pozzi |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Biochemical oxygen demand Environmental Engineering MATÉRIA ORGÂNICA DO SOLO Nitrogen Chemical oxygen demand General Medicine Wastewater Management Monitoring Policy and Law Waste Disposal Fluid Aerobiosis Bioreactors chemistry Environmental chemistry Biofilter Organic matter Leachate Ammoniacal nitrogen Waste Management and Disposal Filtration Water Pollutants Chemical Total suspended solids |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0301-4797 |
| Popis: | 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 (BOD), 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. |
| Databáze: | OpenAIRE |
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