Abstract:
Biosludge from domestic wastewater treatment plant could be used as the adsorbent of both pb2+and N?. The resting and autoclaved biosludges showed the pb2+and Ni2+adsorption abilities of 0.835*0.002 and 0.627*0.001 and 0.717*0.001 and 0.626*0.003 glg biosludge, respectively. Both adsorbed pb2+ and Ni2' could be eluted from the biosludge by washing with 0.1M HNO, solution with the highest elution efficiency of 76.49*0.51% and 75.83&1.45%, respectively. Biosludge also showed both pb2+ and Ni2+ removal ability under Granular activated carbon sequencing batch reactor system (GAC-SBR). GAC-SBR system showed highest pb2+ and Ni2+ removal efficiency of 90.14*0.27% and 84.86*1.46% with synthetic wastewater containing pb2+ and synthetic wastewater containing ~i*', respectively under HRT of 3 days and mixed liquor suspended solid (MLSS) of 3000 mgll. And the GAC-SBR system showed b'+ and Ni2+ adsorption abilities of 85.72*0.20% and 83.44*0.22% respectively with synthetic wastewater containing both pb2+ and N? under HRT of 3 days and MLSS of 3000 mgil. But, the SBR system showed low removal efficiency with real industrial estate wastewater. However, the efficiencies of the GAC-SBR system with real industrial estate wastewater were increase by adding glucose. The pb2+, Ni2+, BOD5, COD and TKN removal efficiency of GAC-SBR system were increased up to 8 1.54&0.73%, 5 1.88&0.44%, 96.57*0.32%, 91.80*0.99% and 64.95*4.62%, respectively with industrial estate wastewater that was supplemented with 409.69 mgll glucose.