抄録
The rising cost of crude oil and concern over their future scarcity has brought about more interest in the massive production of methane from various types of substrates by using anaerobic fermentation technology. Substantial progress has been made by the CNU research team in understanding the potential for biogas production from energy crops and animal manure. Among the energy crops examined, such as sorghum, barley, rye, maize, reed, sudangrass, Italian rye grass, oat, animal manure etc. were chosen as a feed substrate in this study. The first order batch reaction rate coefficient, represented k, is the one of most useful parameter to describe the degree of anaerobic degradation of energy crops and animal manure. An ideal batch reaction yields straight line, indicating a single decay rate coefficient. However the reaction curves usually consisted of the linear form with a steep slope (k1) during the initial period of operation, followed by a gradual non-linear transition, and then a second linear line with a slower slope (k2). In this study the multiple reaction rate coefficients at their corresponding substrate fractions (S1 and S2) were calculated to evaluate the degradation kinetics of energy crops and animal manure during the batch reaction.
