| Recently, researchers from Qingdao Institute of Bioenergy and Processes, Chinese Academy of Sciences proposed an integrated lignocellulosic biosaccharization (CBS) strategy based on cellulose microcosm whole bacteria catalyst, providing technical guidance for the industrialization of lignocellulosic bioconversion. Lignocellulosic conversion includes pretreatment, enzymatic saccharification and fermentation. Saccharification is considered as the decisive factor for the feasibility of lignocellulosic biotransformation. Compared with other known lignocellulosic bioconversion strategies, CBS strategy, on the one hand, organically integrates enzyme production and hydrolysis steps in a way similar to integrated biological processing (CBP), and has advantages in enzyme cost. On the other hand, the downstream fermentation steps are divided to a certain extent, and fermentable sugars are used as platform chemicals in the downstream fermentation, which has significant product export flexibility compared with CBP. Researchers early CBS all bacteria which have been successfully build a more efficient catalyst, optimizing the saccharification process to reduce production cost and shorten the process, and through the coupling pretreatment process and the downstream application technology preliminary based on CBS's entire lignocellulose bioconversion, finished CBS technology development at the level of test in laboratory. The CBS process takes fermentable sugar as the product, making the production cost of fermentable sugar lower than that of starch sugar, which is the premise of applying lignocellulosic bioconversion technology based on CBS process to actual industrial production. Should further improve the efficiency of CBS saccharification and sugar yield, optimize the CBS biological catalyst and process need to solve key problems as follows: enhance the CBS bacteria inhibitor derived from catalyst for pretreatment of tolerance, optimization of different function components in the fiber body energy balance, development of new technology and form a complete set of equipment to improve saccharifying to enhance the mass transfer efficiency of the substrate capacity, improve the pretreatment method and the downstream application technology and CBS process compatibility, etc. At present, researchers are cooperating with enterprises to enlarge CBS process in pilot scale, establish an industrial demonstration system based on this process, and complete a complete set of lignocellulosic bioconversion technology scheme based on CBS process. Lignocellulosic biomass has great potential to replace fossil resources and can effectively alleviate global dependence on crude oil. Although some lignocellulosic products such as cellulosic ethanol have been produced at home and abroad, compared with the products from fossil sources, lignocellulosic products are still not competitive in the market so far, so it is urgent to improve the economy of lignocellulosic conversion technology. This article from the global chemmade |
