| Title |
Effects of the Rate of GAC packed in the Anaerobic reactor on the Treatment of Textile Wastewater in Anaerobic - aerobic Process |
| Authors |
황규대(Gye Dae Whang),최효수(Hyo Soo Choi),이지웅(Ji Woong Lee) |
| Abstract |
The objective of this study was to investigate the effectiveness of GAC in the anaerobic reactor and effect of the anaerobic-aerobic biological process. The role of GAC in the anaerobic reactor adsorbs toxic constituents on the GAC medium and increase biomass concentration, while the attached biofilm efficiently used the biodegradable compounds. Four sets of lab-scale anaerobic-aerobic biological reactors were operated. The packing density of GAC in the anaerobic reactors were 0%, 5%, 10%, and 20% (W/V) respectively. The hydraulic retention time (HRT) of the anaerobic and aerobic reactor was four hours, respectively and solid retention time (SRT) was seven days. The operating temperature of the anaerobic reactor was maintained at 40℃, during the experiment period. One aerobic reactor which was operated with 8 hours of HRT and 7 days of SRT was selected as a control to compare the performance with the anaerobic-aerobic process. The anaerobic-aerobic processes which contain GAC in anaerobic reactor showed about 10% higher SCOD_Cr and color removal efficiency than that of anaerobic-aerobic process which was not filled with GAC and showed less effluent quality fluctuation as the composition of wastewater was changed. As the packing density of GAC in the anaerobic reactors increased from 5% to 20%, efficiency did not improved. The average SCOD_Cr and color removal efficiency of the anaerobic-aerobic process which contain GAC in the anaerobic reactor was about 70%, 60%, respectively. Aerobic process showed 61% of SCOD_Cr and 19% of color removal efficiency respectively. Anaerobic-aerobic biological process is more effective in color removal than aerobic reactor process and addition of GAC in the anaerobic reactor is effective in SCOD_Cr removal. |