Abstract:
Disperse dyes could be adsorbed on the biosludge of wastewater treatment plant. And the resting biosludge showed higher organic matters and color adsorption capacity than autoclaved biosludge. The resting biosludge showed the maximum color, BOD, and COD adsorption capacities of 36.98*0.53, 244*26.52 and 396h6.01 mg/g biosludge, respectively and also the biosludge could be reused after washing with 0.1M NaOH solution. By treatment of sequencing batch reactor (SBR) system, both organic matters and disperse dye in synthetic textile dyeing wastewater (STDW) could be removed and SBR system showed the higher removal with STDW containing disperse red 60. The maximum color (disperse red 60), BOD,, COD and TKN removal efficiencies are 94.9*3.3%, 97.3*0.6%, 96.6*0.6% and 89.9&2.4%, respectively. Granular activated carbon (GAC) increased efficiencies of the SBR system, the color (disperse red 60), BOD,, COD and TKN removal efficiencies were 97.5*3.1, 98.20.5, 97.5*0.7 and 91.5*1.9%, respectively. The removal efficiencies of GAC-SBR and SBR system with MLSS of 2,500 mg/L and HRT of 5 days textile dyeing wastewater were quite low but they were increased when the TDW were supplemented with glucose. Moreover, the system could have the maximum efficiencies when adding GAC. The color, BOD,, COD and TKN removal efficiencies are 94.634.7%, 94.4*0.6%, 94.4*0.8% and 59.3*8.5%, respectively.