43results about How to "Low residual sugar" patented technology

This invention discloses a lichee aquavit and its preparation method, which takes pulps pulping kernels, broken bits as the raw material to be fermented with an equal volume of saccharide acid water to become the lichee raw spirit to be distilled for the first and second times in a method of breaking off both ends, the rough raw aquavit after the first time distillation is at 18-20%(v / v) and the second time is at 55-60%(v / v), then the distilled one is aged in an oak drum for cold stable process under -10 to -18deg.C to be added and filtered finally.

The invention provides a preparation method of ethanol. The preparation method includes the following steps: step S1, liquefying and saccharifying the starch slurry to obtain a saccharified mash; step S2, separating part of the saccharified mash from solid-liquid to obtain a syrup supernatant, and the concentration of glucose in the syrup supernatant is higher than that of the saccharified mash The concentration of glucose in the mash; in step S3, the remaining saccharified mash and the syrup supernatant are mixed and fermented to obtain ethanol. Since the syrup supernatant without solid content is blended and fermented with the saccharified mash, the viscosity of the fermented mash can be greatly reduced, and the mash can be more in line with the requirements of stirring, transportation and heating and cooling processes. It can be seen that the above method can also have the characteristics of high ethanol concentration, low residual sugar and energy saving, thereby greatly increasing the output and significantly improving the economic benefits.

The invention belongs to the technical field of fermentation and in particular discloses a process for preparing and extracting L-glutamine. The process comprises the following steps: preparing L-glutamine feed liquid, performing ultrafiltration treatment, removing mycoprotein and other macromolecular substances, performing activated carbon decolorization, strongly acidic cation exchange, vacuum concentration, isoelectric point cooling crystallization, centrifugation and the like on ultrafiltrate so as to obtain a crude product; re-dissolving the crude product, and sequentially performing weakly acidic and weakly alkaline ion exchange resin impurity removal, vacuum concentration, isoelectric point cooling crystallization, centrifugation and drying, thereby obtaining the refined L-glutamine. According to the process in the invention, the fermentation efficiency of the L-glutamine is improved, the finished product has high purity and total yield, the process is simple and convenient in production technology, the usage amount of the exchange resin is obviously decreased, and the amount of acid and alkali is greatly reduced, so that wastewater discharge is reduced, and environmental protection is facilitated.

The invention discloses a wine Saccharomyces cerevisiae strain with high glycerol yield and low acetic acid yield and a construction method thereof and belongs to the technical field of industrial microorganisms. Saccharomyces cerevisiae NJZCC17 and NJZSC5 are used as original strains subjected to haploid separation, ALD6 gene in haploids is knocked out separately to obtain genetically-modified strains, the genetically-modified strains 17A24-ald6 Delta (MATa) and 5125-ald6 Delta (MAT alpha) are subjected to diploid hybridization fusion to obtain diploid hybrid strain NJZ17A5-ald6 Delta. The wine Saccharomyces cerevisiae strain has the advantages that acetic yield during alcohol fermentation is lowered, and more carbon metabolic fluxes are diverted to generate and accumulate glycerol; the yield of ethyl acetate is lowered; the yields of isoamyl alcohol and 2-phenylethyl alcohol are increased. Therefore, a novel method for lowering acetic acid yield and increasing glycerol yield is provided for wine making industry.