Efficient method for separating solid residue and product in lignocellulose fermented mash

Abstract

The invention relates to an efficient method for separating solid residue and products in lignocellulose fermented mash. The method comprises the specific steps of: (1) preparing a flocculant solution; (2) evenly mixing the lignocellulose fermented mash with a flocculant solution, and stirring for 5 min to fully contact the flocculant with the lignocellulose solid; and (3) conducting a solid-liquid separation on the mixed fermented mash by using a mill or a vacuum filtration device, so as to obtain a clear liquid containing fermentation products and lignocellulose solid residue. The invention has wide raw material resources, greatly reduces energy consumption of the solid-liquid separation in the condition of ensuring yield of effective products in the lignocellulose fermented mash, further improves the production process of fuel ethanol and bulk chemicals from biotransformation lignocellulose, and provides technical reserve for industrialization of lignocellulose biorefinery.

Description

【Technical field】 [0001] The invention relates to the technical field of lignocellulose, in particular to a method for efficiently separating solid residues and products in lignocellulose fermentation mash. 【Background technique】 [0002] The use of abundant and renewable lignocellulosic biomass to produce liquid fuels and bulk chemicals can effectively alleviate human dependence on fossil resources and improve the increasingly serious environmental pollution and greenhouse effect. At present, it has become the research and development focus and priority development strategy of major countries. [0003] When bioconverting lignocellulosic raw materials to produce biofuels and bio-based chemicals, the simultaneous saccharification and fermentation process (Simultaneous saccharification and fermentation, SSF) is generally adopted, which can reduce the inhibition of cellulase by sugar and improve the production efficiency of cellulosic raw materials. The conversion rate; at the...

AI Technical Summary

Problems solved by technology

Due to the small particle size of these particles, traditional separation methods such as distillation, centrifugation, plate and frame filter press, etc. are difficult to work

For example, in the process of distillation, due to the existence of a large amount of solid residue, the pipeline will be blocked and the bottom of the kettle will be severely coked, which will greatly reduce the separation efficiency and service life of the distillation tower, and accelerate the loss of equipment; centrifugal energy consumption is large, and the equipment is expensive ;During the plate and frame filter press process, the viscosity of the fermentation liquid is extremely high, and the diameter of the solid particles is very small, which can easily cause the filter cloth to be blocked and effectively separate the solid residue from the product.