Brazilian Bioethanol Science and Technology Laboratory (CTBE), Brazilian Center for Research in Energy and Materials (CNPEM), Rua Giuseppe Máximo Scolfaro, 10000, Polo II de Alta Tecnologia, P.O. Box 6170, Campinas, São Paulo 13083 - 970, Brazil.
Department of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
Bioresour Technol. 2015 Aug;190:227-34. doi: 10.1016/j.biortech.2015.04.089. Epub 2015 Apr 29.
Bioethanol production generates large amounts of vinasse, which is suitable for biogas production. In this study, the anaerobic digestion of sugar beet vinasse was optimised using continuous stirred-tank reactors (CSTR) supplemented either with lime fertiliser or with 3% cow manure. In both reactors, the C/N ratio was adjusted by adding straw. The biochemical methane potential (BMP) of vinasse was 267.4±4.5LCH4kgVS(-1). Due to the low content of macro- and micronutrients and low C/N ratio of vinasse, biogas production failed when vinasse alone was fed to the reactor. When co-substrate was added, biogas production achieved very close to the BMP of vinasse, being 235.7±32.2LCH4kgVS(-1) from the fertiliser supplied reactor and 265.2±26.8LCH4kgVS(-1) in manure supplied reactor at steady state. Anaerobic digestion was the most stable when cow manure was supplied to digestion of vinasse.
生物乙醇生产会产生大量的酒糟，非常适合用于沼气生产。在这项研究中，采用连续搅拌釜式反应器（CSTR）对甜菜酒糟进行了优化，分别用石灰肥料或 3%的牛粪进行补充。在两个反应器中，均通过添加稻草来调节 C/N 比。酒糟的生物化学甲烷潜能（BMP）为 267.4±4.5LCH4kgVS(-1)。由于酒糟中缺乏大量的宏量和微量营养素，且 C/N 比较低，因此当单独用酒糟喂养反应器时，沼气生产无法进行。当添加共底物时，沼气生产非常接近酒糟的 BMP，来自肥料供应反应器的沼气产量为 235.7±32.2LCH4kgVS(-1)，在稳定状态下，来自粪便供应反应器的沼气产量为 265.2±26.8LCH4kgVS(-1)。当用牛粪供应酒糟消化时，厌氧消化最为稳定。
