Abstract:
Resting (living) bio-sludge of domestic wastewater treatment plant could be used as the adsorbent of both organic matters and direct dyes. The dye adsorption ability of the bio-sludge was not be increased by induction with direct dyes. Both direct red 23 and direct blue 201 could be adsorbed onto the bio-sludge as the almost same adsorption capacity. The resting bio-sludge showed higher adsorption ability than autoclaved bio-sludge. The resting bio-sludge that was acclimatized with synthetic textile wastewater (STWW) without direct dyes showed the highest direct blue 201, COD and BOD, adsorption capacity of 16.1250.35, 453.3357.44 and 292.5059.08 mg/g of bio-sludge. respectively. The dye adsorption ability of bio-sludge was decreased by autoclaving. And the dye adsorption ability of deteriorated bio-sludge recovered by washing with 0.1% sodium dodecyl sulfate solution. The direct dyes of STWW were also easily removal with by GAC-SBR system. The dyes removal efficiencies were higher than 80% even the system was operated under a high organic loading of 0.36 kg BOD/^^-^. But, GAC-SBR system showed low direct dyes removal efficiency of only 57.0852.1% with raw textile wastewater (TW) even the system was operated with organic loading of only 0.083 kg BOD/^'-^. However, the dyes, COD, BOD, and total kjeldalh nitrogen removal efficiencies were increased up to 76.0352.8%, 86.17M.5%, 84.20M.7 and 68.2052.1% respectively when the TWW was supplemented with glucose (organic loading of 0.17 kg BOD/).