| Title |
Comparative Analysis of Biomass Yield Coefficient (YH) in Different Metabolic Regimes of Aerobic, Anoxic and Anaerobic Conditions |
| Authors |
신정섭 ( Jung Sub Shin ) ; 고광백 ( Kwang Baik Ko ) ; 이지영 ( Ji Young Lee ) ; 임세호 ( Se Ho Lim ) ; 강승현 ( Seung Hyun Kang ) ; 박재한 ( Jae Han Park ) |
| Keywords |
A2/O process; Heterotrophic biomass yield coefficients; 4-stage BNR process |
| Abstract |
Heterotrophic biomass yield coefficients, Y(H), for aerobic, anoxic and anaerobic reactors were successfully estimated for the two wastewater treatment plants, where one plant was operating in the A2/O process and the other was operating in the 4-stage BNR process. The estimation of Y(H) was undertaken by plotting the biomass COD concentrations versus the soluble COD concentrations in order to calculate the △biomass COD/△soluble COD in each batch reactor. The batch reactors employed in this study were fed by filtered influent and mixed liquors in the ratio of 10:1, and operated in the aerobic, anoxic and anaerobic conditions, which represented the actual operating conditions for the A2/O and 4-stage BNR process. The average Y(H) values of the aerobic, anoxic and anaerobic reactor for the A2/O process were 0.52, 0.41 and 0.18㎎ COD/㎎ COD, respectively, and those for the 4-stage BNR process were 0.58, 0.40 and 0.20㎎ COD/㎎ COD, respectively. The average ratio of the Y(H) for aerobic reactors to those for the anoxic reactors were about 1:0.79 for the A2/O process, and about 1:0.69 for the 4-stage BNR process. The experimental method for anoxic and anaerobic Y(H) estimation shown in this study has turned out to be simple and efficient in its practical application. |