Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, USA.
Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, USA; Great Lakes Bioenergy Research Center (GLBRC), Michigan State University, East Lansing, MI, USA.
Bioresour Technol. 2019 Jan;272:326-336. doi: 10.1016/j.biortech.2018.10.049. Epub 2018 Oct 22.
The co-digestion of pretreated sugarcane lignocelluloses with dairy cow manure (DCM) as a bioenergy production and waste management strategy, for intensive livestock farms located in sugarcane regions, was investigated. Ammonia fiber expansion (AFEX) increased the nitrogen content and accelerated the biodegradability of sugarcane bagasse (SCB) and cane leaf matter (CLM) through the cleavage of lignin carbohydrate crosslinks, resulting in the highest specific methane yields (292-299 L CH/kg VSadded), biogas methane content (57-59% v/v) and biodegradation rates, with or without co-digestion with DCM. To obtain comparable methane yields, untreated and steam exploded (StEx) SCB and CLM had to be co-digested with DCM, at mass ratios providing initial C/N ratios in the range of 18 to 35. Co-digestion with DCM improved the nutrient content of the solid digestates, providing digestates that could be used as biofertilizer to replace CLM that is removed from sugarcane fields during green harvesting.
本研究考察了在甘蔗种植区的集约化养殖场中，将预处理后的甘蔗木质纤维素与奶牛粪（DCM）共消化作为生物能源生产和废物管理策略的可行性。氨纤维膨胀（AFEX）通过切断木质素-碳水化合物交联来提高氮含量并加速甘蔗渣（SCB）和蔗叶物质（CLM）的生物降解性，从而产生最高的特定甲烷产量（292-299 L CH/kg VSadded）、沼气甲烷含量（57-59% v/v）和生物降解率，无论是否与 DCM 共消化。为了获得可比的甲烷产量，未经处理和蒸汽爆炸（StEx）的 SCB 和 CLM 必须与 DCM 共消化，质量比为提供初始 C/N 比在 18 到 35 之间。与 DCM 共消化提高了固体消化物的养分含量，提供了可作为生物肥料替代在绿色收割期间从甘蔗田去除的 CLM 的消化物。
