Degradación de clorofenoles por sulfato-reducción en un reactor de lecho fluidizado de flujo descendente (LFFD)
The operation of the UASB and DFFB reactors to the acclimatization and degradation of 2CP, was carried out with increasing concentrations strategy of formic acid, 2CP and sulfate, in three stages of 30 days each, adding concentrations of 2CP below the IC50 (0.776 mM) calculated for this compound. Th...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | México |
| Institución: | Universidad Autónoma Metropolitana |
| Repositorio: | Repositorio Institucional de la UAM Iztapalapa |
| Idioma: | español |
| OAI Identifier: | oai:bindani.izt.uam.mx:p8418n54d |
| Acceso en línea: | https://doi.org/10.24275/uami.p8418n54d |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/LEM/Cloro info:eu-repo/classification/LEM/Chlorine info:eu-repo/classification/LEM/Phenols info:eu-repo/classification/LEM/Fenoles info:eu-repo/classification/cti/6 |
| Sumario: | The operation of the UASB and DFFB reactors to the acclimatization and degradation of 2CP, was carried out with increasing concentrations strategy of formic acid, 2CP and sulfate, in three stages of 30 days each, adding concentrations of 2CP below the IC50 (0.776 mM) calculated for this compound. The maxium consumption of 2CP in both reactors was observed during the first stage in the UASB (50%) and DFFB (39%) reactors, when 0.19 mM was added, declining in the following two stages to 21 and 14% in the UASB and 18 and 23% in the DFFB reactors. Phenol and acetate were detected in the reactors during the first-stage, which indicated 2CP dehalogenation and phenol and acetate utilization as electron donors. The carbon source was consumed in a 100% in both reactors during the operation time and the smaller sulfate consumption was found in the third stage, with 78% and 55% for the DFFB and UASB reactors respectively, at a concentration of 0.39 mM 2CP. Finally, the effect of COD/SO4 2- ratio on the degradation of 2CP was tested using two ratios of 0.8 and 2.2. Although the reactor at a ratio of 2.2 was fed with a higher organic matter concentration, both reactors consumed approximately 0.1 mM of 2CP. Despite formic acid was fed in excess to be used as an electrons source for sulfate reduction and dehalogenation, the latter process was not fully induced. On the other hand, the consumption profiles of 2CP and sulfate indicated that the dehalogenation of 2CP is not coupled to sulfate reduction. |
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