Estudo da aplicação de foto-Fenton (Fe2+/H2O2) solar no pré-tratamento do chorume
The studied leachate from the town of Cachoeira Paulista in the state of São Paulo shows the following parameter concentrations: total organic carbon (TOC = 368.6 mg C. L-1), chemical oxygen demand (COD = 3552.2 mg O2. L-1) and biochemical oxygen demand (BOD5 = 397.4 mg O2. L-1), which indicates low...
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| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Portugués |
| Publicado: |
2013
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/60697 |
| Aporte de: |
| Sumario: | The studied leachate from the town of Cachoeira Paulista in the state of São Paulo shows the following parameter concentrations: total organic carbon (TOC = 368.6 mg C. L-1), chemical oxygen demand (COD = 3552.2 mg O2. L-1) and biochemical oxygen demand (BOD5 = 397.4 mg O2. L-1), which indicates low biodegradability ratio (BOD5 / COD = 0.11). Advanced oxidation processes (AOPs) are considered an alternative to its pre-treatment. The aim of this work is to use homogeneous photocatalysis through an opened photo- Fenton (H2O2 + Fe2+) solar reactor with constant effluent volume (3 L) to verify the efficiency and economic evaluation of removing organic loads. The reactor has a wooden support that is directed to the equator with an inclination angle of 23 ° and a metal plate without pigmentation and constant leaking (13 L.min-1). At the same time, the volume of reagent Fe 2 + (0.82 mol.L-1) was added completely at the beginning of the reaction and the volume of reagent H2O2 (30 % w / w) was added quantitatively during 60 minutes. Radiation was measured with a portable radiometer. The process has been optimized by a fractional factorial planning (24-1). The studied factors were: pH, range of solar radiation, amounts of H2O2 (g) and Fe 2+ (g). The largest percentage of reduction in TOC was 82.12% with an increase of its biodegradability to 0.41 together and an optimized cost of US$ 0.188 / 3 L. Thus, the photocatalytic process showed great technical and economic feasibility regarding the degradation of organic load in leachate. |
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