Forest Products Biotechnology/Bioenergy Group, Department of Wood Science, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver BC V6T 1Z4, Canada.
Forest Products Biotechnology/Bioenergy Group, Department of Wood Science, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver BC V6T 1Z4, Canada.
Bioresour Technol. 2020 Apr;302:122895. doi: 10.1016/j.biortech.2020.122895. Epub 2020 Jan 27.
Over the last century the pulp and paper sector has assessed various technologies to fractionate woody biomass to produce strong, bright fibers. Several of these processes have also been assessed for their potential to pretreat and fractionate biomass to enhance the subsequent enzymatic hydrolysis of the cellulosic component. Although many of these pretreatments are effective on agricultural residues, softwoods have proven more recalcitrant, primarily due to their high lignin content and structure. As delignification is too expensive to be used routinely a more economically attractive approach might be to alter the lignin. Recent work has shown that, using a modified chemithermomechanical pulping (CTMP) "front end", lignin can be modified and relocated. This significantly enhanced hemicellulose recovery and enzyme-mediated cellulose hydrolysis of woody biomass. As well as being effective on wood chips, the modified CTMP pretreatment process also enhanced the bioconversion of densified feedstocks such as pellets.
在上个世纪，纸浆和造纸行业评估了各种技术来对木质生物质进行分级，以生产出强韧、光亮的纤维。其中一些工艺也被评估了其对生物质进行预处理和分级的潜力，以提高后续纤维素成分的酶水解效率。尽管许多这些预处理方法对农业残余物都很有效，但软木的处理效果却更为困难，主要是因为其高木质素含量和结构。由于脱木质素的成本过高，无法常规使用，因此更具经济吸引力的方法可能是改变木质素。最近的研究表明，使用改良的化学热机械浆（CTMP）“前端”，木质素可以被修饰和重新定位。这显著提高了半纤维素的回收和酶介导的木质生物质的纤维素水解效率。除了对木屑有效外，改良的 CTMP 预处理工艺还提高了致密化原料（如颗粒）的生物转化效率。
