<b>Application of activated sludge process followed by physical-chemical processes in the treatment of industrial saline effluent for reuse</b> - doi: 10.4025/actascitechnol.v35i2.13006

Autores

  • Milene Carvalho Bongiovani Universidade Federal do Rio de Janeiro
  • Márcia Dezotti Universidade Federal do Rio de Janeiro
  • Geraldo André Thurler Fontoura Universidade Federal do Rio de Janeiro

DOI:

https://doi.org/10.4025/actascitechnol.v35i2.13006

Palavras-chave:

water reuse, saline effluent, activated sludge, coagulation/flocculation

Resumo

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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Publicado

2012-12-03

Como Citar

Bongiovani, M. C., Dezotti, M., & Fontoura, G. A. T. (2012). <b>Application of activated sludge process followed by physical-chemical processes in the treatment of industrial saline effluent for reuse</b> - doi: 10.4025/actascitechnol.v35i2.13006. Acta Scientiarum. Technology, 35(2), 299–305. https://doi.org/10.4025/actascitechnol.v35i2.13006

Edição

Seção

Engenharia Quí­mica

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