ABSTRACT
Presence of dyes, salts, and other pollutants in textile dyeing effluents creates more problems in the treatment process. In this present work, the sequential batch reactor was utilized for the treatment of textile dyeing effluent under anaerobic conditions. The reactor was modified by adding sorbent to enhance the performance of the anaerobic sequential batch reactor (ASBR). During the start-up period, chemical oxygen demand (COD), volatile fatty acid (VFA) and gas production were analyzed. After the start-up period, experiments were carried out in the ASBR to optimize the sorbent dosage and cycle time using response surface methodology (RSM). After optimization, experiments were also performed to study the performance of ASBR for textile dyeing effluent in terms of decolorization, COD reduction, sludge volume index (SVI) and mixed liquor volatile suspended solids (MLVSS) at various organic loading rate (OLR). A maximum decolorization and COD reduction of 87.2% and 91.9% respectively were observed at an organic loading rate of 0.110 kg COD/m3d. Gas production, food to microorganism (F/M) ratio, SVI, MLVSS and volatile fatty acid were also monitored in the ASBR during the experimentation.
