Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, Koganei, Tokyo 184-8588, Japan.
Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Bioresour Technol. 2018 Mar;252:127-133. doi: 10.1016/j.biortech.2017.12.099. Epub 2017 Dec 30.
This study investigated the effect of the feedstock-to-inoculum (F/I) ratio on performance of the solid-state anaerobic co-digestion of pig urine and rice straw inoculated with a solid digestate, and clarified the microbial community succession. A 44-day biochemical methane potential test at F/I ratios of 0.5, 1, 2 and 3 at 55 °C and a 35-day large-scale batch test at F/I ratios of 0.5 and 3 at 55 °C were conducted to investigate the effects of F/I ratio on anaerobic digestibility and analyze microbial community succession, respectively. The highest cumulative methane yield was 353.7 m/t VS in the large-scale batch test. Volatile fatty acids did not accumulate at any F/I ratios. The volatile solids reduction rate was highest at a F/I ratio of 0.5. Microbial community structures were similar between F/I ratios of 3 and 0.5, despite differences in digestion performance, suggesting that stable operation can be achieved at these ratios.
本研究考察了进料比（F/I）对猪尿和稻草的固态厌氧共消化接种固体消化物性能的影响，并阐明了微生物群落的演替。在 55°C 下进行了为期 44 天的生化甲烷潜能测试，F/I 比分别为 0.5、1、2 和 3，以及为期 35 天的大规模分批测试，F/I 比分别为 0.5 和 3，以研究 F/I 比对厌氧消化性的影响，并分析微生物群落的演替。在大规模分批试验中，最高的累积甲烷产量为 353.7 m/tVS。在任何 F/I 比下，挥发性脂肪酸都没有积累。在 F/I 比为 0.5 时，挥发性固体减少率最高。尽管消化性能存在差异，但 F/I 比为 3 和 0.5 时的微生物群落结构相似，表明在这些比例下可以实现稳定运行。
