Biological and Agricultural Engineering Department, University of California, Davis One Shields Avenue, Davis, CA 95616, USA.
Bioresour Technol. 2011 Jan;102(2):1489-95. doi: 10.1016/j.biortech.2010.09.105. Epub 2010 Oct 29.
Ensiling was investigated for the long-term storage of Sugar Beet Pulp (SBP). Eight strains of lactic acid bacteria (LAB) and a non-inoculated control were screened based on their ability to rapidly reduce pH, produce a large amount of lactic acid and inhibit undesirable fermentations. Lactobacillus brevis B-1836 (LAB #120), Lactobacillus fermentum NRRL B-4524 (LAB #137) and a non-inoculated control were selected for further research to determine the effects of LAB inoculation level and packing density on SBP silage quality and sugar yield upon enzymatic hydrolysis. Both SBP preservation and prevention of cellulose and hemicellulose loss were better when SBP was treated with LAB #137 compared to LAB #120 and the non-inoculated control. Additionally, the ensiling process was found to significantly improve the enzymatic digestibility of SBP by as much as 35%. The results suggest that ensiling may be a promising technology for SBP stabilization and pretreatment for bioconversion to products.
青贮被研究用于长期储存糖甜菜浆（SBP）。基于快速降低 pH 值、产生大量乳酸和抑制不良发酵的能力，筛选了 8 株乳酸菌（LAB）和未接种对照。选择乳杆菌 B-1836（LAB#120）、发酵乳杆菌 NRRL B-4524（LAB#137）和未接种对照进行进一步研究，以确定 LAB 接种水平和包装密度对 SBP 青贮质量和酶水解后糖产量的影响。与 LAB#120 和未接种对照相比，LAB#137 处理的 SBP 保存效果更好，且能更好地防止纤维素和半纤维素损失。此外，青贮过程被发现可使 SBP 的酶解消化率显著提高多达 35%。结果表明，青贮可能是 SBP 稳定化和生物转化为产品的预处理的有前途的技术。
