Comparison of sequencing batch reactor (SBR) and granular activated carbon-SBR (GAC-SBR) systems on treatment textile wastewater containing basic dye

Abstract

AbstractEfficiencies of SBR and granular activated carbon (GAC)-SBR systems with textile industrial wastewater (TIW) containing basic dyes (Basic Red 46 (BR46) and Basic Blue 41 (BB41)) at hydraulic retention times (HRTs) of 3.0, 5.0, and 7.5 d were investigated. The results showed that the basic dyes could be adsorbed onto bio-sludge but the adsorption yield depended on the molecular structure and weight of the basic dye. BR46 could be adsorbed onto the bio-sludge with higher yield than BB41. Also, the color adsorption yield of living bio-sludge was 22% higher than that of autoclaved bio-sludge (thermally treated bio-sludge). Moreover, the bio-sludge from a domestic wastewater treatment plant showed higher color adsorption yield than the bio-sludge from a textile wastewater treatment plant. The GAC-SBR system was more suitable than the SBR system to treat TIW. The highest color, COD, BOD5, total Kjeldahl nitrogen (TKN), and total nitrogen (TN) removal efficiencies of the GAC-SBR system with TIW at HRT of...