Ulm University, Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
Ulm University, Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
Bioresour Technol. 2020 May;304:123004. doi: 10.1016/j.biortech.2020.123004. Epub 2020 Feb 11.
Intermittent supply of easily degradable carbohydrates can be used for on-demand biogas production. The study tested the effects of splitting feeding portions of sugar beet silage (S) on biogas production rates and total yield, respectively and if methane production rates follow those ones of biogas. Four experimental AD reactors were operated for 117 days at organic loading rates of 2.0 kg m d and VS ratios of maize silage (M) to S of 3:1. While M was supplied hourly (h-h), reactors differed only regarding the intermittent S supply, provided at once (h), twice (h, h) and three times (h, h, h) per twelve-hour observation period. Biogas and methane production rates rose simultaneously after S supply and lasted depending on S intakes. Biogas and methane yields were significantly increased at S given once and twice per period. Appropriate feedstock management can thus influence production rates and increase biogas and methane yields.
间歇性供应易降解碳水化合物可用于按需沼气生产。本研究分别测试了分批给糖甜菜青贮饲料（S）和甲烷产率是否遵循沼气产率的方式对沼气产量和总产量的影响。在有机负荷率为 2.0kg m d 和青贮玉米（M）与 S 的 VS 比为 3:1 的条件下，四个实验性 AD 反应器运行了 117 天。当 M 每小时（h-h）供应时，反应器仅在间歇供应 S 方面有所不同，即在每 12 小时观察期内一次性（h）、两次（h，h）和三次（h，h，h）供应。S 供应后，沼气和甲烷的产生速率同时上升，并且取决于 S 的摄入量而持续。在每个周期内一次和两次供应 S 时，沼气和甲烷的产率显著增加。因此，适当的原料管理可以影响生产速率并提高沼气和甲烷的产率。
