Hydraulic retention time influence on azo dye and sulfate removal during the sequential anaerobic-aerobic treatment of real textile wastewater.
Water Sci Technol
; 76(11-12): 3319-3327, 2017 Dec.
Article
em En
| MEDLINE
| ID: mdl-29236011
ABSTRACT
In the present study, we evaluate the behavior of real textile wastewater treatment using a system composed of two sequential pilot-scale reactors (anaerobic followed by aerobic) during 622 days. The work focused on the competition between color and sulfate removal processes, when the hydraulic retention time (HRT) was increased in the anaerobic/aerobic reactors from 16/12 hours in phase I (PI) to 4/3 days in phase II (PII). The organic matter was successfully removed in both phases through the system, and the highest efficiency (75%) was achieved in PII. The increase in the HRT did not improve azo dye degradation under anaerobic conditions. Instead, it favored sulfate reduction, which removal efficiency increased from 26% in PI to 75% in PII. Aromatic amines were detected in the anaerobic reactor effluent and removed in the aerobic reactor.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Sulfatos
/
Compostos Azo
/
Indústria Têxtil
/
Reatores Biológicos
/
Corantes
/
Águas Residuárias
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article