| 저자(한글) |
Shin, Kook-Sik,Yoon, Young-man,Jung, Ha-Il,Hyun, Byung-Geun,Cho, Hyun-Joon,Sonn, Yeon-Kyu |
| 초록 |
This study investigated methane productions and a degradation rate of organic matters by German standard method, VDI4630 test. In this study, 4 livestock byproducts from livestock farm were selected for the investigation. The objective of this study was to estimate a distribution of organic matters by using the double first-order kinetics model in order to calculate the rate of biodegradable organic matters which degrade rapidly in the initial stage and the persistently biodegradable organic matters which degrade slowly later. As a result, all the byproducts applied in this study showed rapid decomposition in the initial stage. Then the decomposition rate began to slow down for a certain period and the rate became 5 times slower than the initial decomposition rate. This trend of decomposition rate changes is typical conditions of organic matter decompositions. The easily degradable factors ( $k_1$ ) ranged between $0.145{ sim}0.257day^{-1}$ and persistent degradable factors ( $k_2$ ) were $0.027{ sim}0.080day^{-1}$ . Among these results, greater organic matter decomposition rates from VDI4630 had greater $k_1$ values (0.257, $0.211day^{-1}$ ) and smaller $k_2$ values (0.027, $0.030day^{-1}$ ) for dairy wastewater and forage byproduct, respectively. |
