| Title |
Effects of Initial C/N Ratio in Reactor on Treating the Mixed Liquor of Nightsoil and Piggery Wastewater by SBR |
| Authors |
김해숙(Hae Suk Kim), 강성환(Sung Hwan Kang), 이찬기(Chan Ki Lee) |
| Abstract |
Biological nutrient removal process such as SBR was influenced by carbon to nitrogen ratio(C/N) in the influent wastewater, which was related with organic matter removal, nitrification and denitrification. This study was performed to investigate the effects of C/N ratio on the treatment of the mixed liquor, nightsoil and piggery wastewater, by SBR process. In summary, the results are follows; i) In order to obtain organic matter removal rate more than 90 percents, the C/N ratio should be maintained less than 12. ii) In the aerobic condition, the laboratory SBR operated with C/N ratio of 6, 9, 12 and 15, respectively, showed the nitrification rates of 1.27, 1.07, 0.97, and 1.26㎎NH₃^+-N/gMv·hr, respectively, and the alkalinity consumption rates of 6.7, 5.5, 5.9 and 3.4㎎Alk.(as CaCO₃)/㎎NH₃^+-N, respectively. iii) The optimum C/N ratio was 12 in consideration of total nitrogen removal efficiency. iv) In the C/N ratio of 6, 9, 12 and 15, the denitrification rates were 0.27, 0.53, 0.74 and 0.94㎎NO₃^--N/gMv·hr, respectively, and the alkalinity production rates were 2.1, 3.0, 3.3 and 3.4㎎Alk.(as CaCO₃)/㎎NH₃^+-N, respectively. |