Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan; Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
Waste Manag. 2021 Jan 1;119:63-71. doi: 10.1016/j.wasman.2020.09.041. Epub 2020 Oct 10.
This study investigated the effects of the addition of micro- (Fe, Co, Ni, and Mo) and macro-(Sulfur) nutrients on mono-digestion of sorghum under mesophilic conditions. A continuous stirred-tank reactor was operated for more than 420 days under seven different experimental conditions. The experimental results showed poor performance for methane production and process stability without nutrient supplementation. Serious deficiencies in Co and S were confirmed by nutrient analysis of dry sorghum and digestate. Nutrient augmentation efficiently enhanced methane production and volatile fatty acid (VFA) removal. Methane production reached 223 mL-CH/g-VS, almost matching the yield predicted by biochemical methane potential (BMP) test. S was demonstrated to have a critical effect on metal availability in the digester. Consequently, to maintain stable methane fermentation, suitable supplementations of S and Co are recommended for anaerobic sorghum mono-digestion.
本研究调查了在中温条件下添加微量（Fe、Co、Ni 和 Mo）和大量（S 元素）营养物质对高粱单消化的影响。在七种不同的实验条件下，连续搅拌罐式反应器运行了超过 420 天。实验结果表明，在没有营养物补充的情况下，甲烷生产和工艺稳定性的性能较差。通过对干高粱和消化物的营养分析，确认 Co 和 S 严重缺乏。营养物的添加有效地提高了甲烷产量和挥发性脂肪酸（VFA）的去除。甲烷产量达到 223 毫升-CH/g-VS，几乎与生物化学甲烷潜能（BMP）测试预测的产量相匹配。S 被证明对消化器中金属的有效性有重要影响。因此，为了保持稳定的甲烷发酵，建议对厌氧高粱单消化进行适当的 S 和 Co 补充。
