Application of activated sludge process followed by physical-chemical processes in the treatment of industrial saline effluent for reuse - doi: 10.4025/actascitechnol.v35i2.13006
The treatment of complex effluent with high salinity and sometimes with toxicity rates from a chemical plant is investigated. Two reactors were monitored continuously: control reactor R1 and reactor R2 adapted for saline effluent with 25h-HRT. The adaptation process to saline effluent (0 - 100%) was...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | Brasil |
| Institución: | Universidade Estadual de Maringá (UEM) |
| Repositorio: | Acta scientiarum. Technology (Online) |
| Idioma: | portugués inglés |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/13006 |
| Acceso en línea: | http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/13006 |
| Access Level: | acceso abierto |
| Palabra clave: | water reuse saline effluent activated sludge coagulation/flocculation |
| Sumario: | The treatment of complex effluent with high salinity and sometimes with toxicity rates from a chemical plant is investigated. Two reactors were monitored continuously: control reactor R1 and reactor R2 adapted for saline effluent with 25h-HRT. The adaptation process to saline effluent (0 - 100%) was effective in removing COD and N-NH4+, respectively with 70 and 85% efficiency. After adaptation, the sequence coagulation/flocculation (40 mg L-1 PAC coagulant and 0.3 mg L-1 cationic polymer), rapid downflow sand filter (120 m3 m-2 day) and reverse osmosis to obtain water for reuse was analyzed. Results obtained by coagulation/flocculation and sand filter sequence were satisfactory, mainly with the removal rates of turbidity at 50-65 and 98%, respectively. Average removals of 91, 87, 98 and 98% were obtained for COD, N-NH4+, TOC and Cl-, respectively, in reverse osmosis, with all parameters below the limits for reuse in cooling towers. However, membrane fouling was detected. |
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