用于处理纤维素生物乙醇生产中酒糟的厌氧消化。
Anaerobic digestion for treatment of stillage from cellulosic bioethanol production.
机构信息
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611-0570, USA.
出版信息
Bioresour Technol. 2013 Sep;144:387-95. doi: 10.1016/j.biortech.2013.06.119. Epub 2013 Jul 4.
Thermophilic anaerobic digestion of stillage from a cellulosic ethanol process that uses sugarcane bagasse as feedstock was investigated. A biochemical methane potential (BMP) of 200 ml CH4 at STP (g VS)(-1) was obtained. The whole stillage was separated into two fractions: a fraction retained on 0.5 mm screen called residue and a fraction passing through 0.5 mm screen called filtrate. About 70% of total methane yield of stillage was produced from the filtrate. The filtrate was anaerobically digested in a 15 L semi-continuously fed digester operated for 91 days at HRTs of 21 and 14 days and organic loading rate (OLR) of 1.85 and 2.39 g COD L(-1) d(-1). The methane yield from the stillage from the digester was about 90% of the yield from the BMP assays. The influent soluble COD (sCOD) was reduced from between 35.4 and 38.8 g COD (L(-1)) to between 7.5 and 8 g COD (L(-1)).
采用甘蔗渣作为原料的纤维素乙醇工艺的酒糟进行了嗜热厌氧消化研究。获得了 200mlCH4 在 STP（gVS）（-1）的生物甲烷潜力（BMP）。将整个酒糟分为两部分：一部分保留在 0.5mm 筛上的称为残渣，另一部分通过 0.5mm 筛的称为滤液。酒糟的总甲烷产量约有 70%来自滤液。滤液在 15L 半连续进料消化器中进行厌氧消化，在 HRT 为 21 天和 14 天以及有机负荷率（OLR）为 1.85 和 2.39gCOD L(-1) d(-1)的条件下运行了 91 天。从消化器中酒糟的甲烷产量约为 BMP 测定的产量的 90%。进水可溶性 COD（sCOD）从 35.4 到 38.8gCOD（L(-1)）降低到 7.5 到 8gCOD（L(-1)）。
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