Department of Agriculture and Environmental Sciences, Lincoln University, Jefferson City, MO 65101, USA.
Bioresour Technol. 2013 Mar;132:305-12. doi: 10.1016/j.biortech.2012.12.183. Epub 2013 Jan 22.
Anaerobic batch digestion of four feedstocks was conducted at 35 and 50 °C: switchgrass; Spirulina platensis algae; and two mixtures of both switchgrass and S. platensis. Mixture 1 was composed of 87% switchgrass (based on volatile solids) and 13% S. platensis. Mixture 2 was composed of 67% switchgrass and 33% S. platensis. The kinetics of methane production from these feedstocks was studied using four first order models: exponential, Gompertz, Fitzhugh, and Cone. The methane yields after 40days of digestion at 35 °C were 355, 127, 143 and 198 ml/g VS, respectively for S. platensis, switchgrass, and Mixtures 1 and 2, while the yields at 50 °C were 358, 167, 198, and 236 ml/g VS, respectively. Based on Akaike's information criterion, the Cone model best described the experimental data. The Cone model was validated with experimental data collected from the digestion of a third mixture that was composed of 83% switchgrass and 17% S. platensis.
四种原料（柳枝稷、螺旋藻、两种柳枝稷与螺旋藻混合物）在 35 和 50°C 下进行了厌氧批式消化：螺旋藻；螺旋藻；以及两种柳枝稷和螺旋藻的混合物。混合物 1 由 87%的柳枝稷（基于挥发性固体）和 13%的螺旋藻组成。混合物 2 由 67%的柳枝稷和 33%的螺旋藻组成。使用四种一阶模型（指数、戈梅兹、菲茨休和锥形）研究了这些原料的甲烷生成动力学。在 35°C 下消化 40 天后，螺旋藻、柳枝稷、混合物 1 和混合物 2 的甲烷产率分别为 355、127、143 和 198ml/gVS，而在 50°C 下的产率分别为 358、167、198 和 236ml/gVS。基于赤池信息量准则，锥形模型最好地描述了实验数据。该锥形模型用由 83%的柳枝稷和 17%的螺旋藻组成的第三种混合物的消化实验数据进行了验证。
