Method for producing phycite by using corn meal

Abstract

The invention relates to a method for producing phycite by fermenting corn meal serving as a starting raw material with candida lipolytica, belonging to the field of microbial fermentation. The method comprises the following steps of: (1) mixing and extruding corn meal with separated and recycled yeast; (2) liquefying and saccharifying the material by undergoing an enzymatic hydrolysis reaction and fermenting phycite by inoculating fermentation seeds to obtain a phycite-containing fermentation liquid; and (3) degerming the fermentation liquid with a metal microfiltration membrane, separating the material from the liquid, and performing moisture evaporation concentration and crystallization on supernate by using a climbing film evaporator. The corn meal is directly taken as the raw material; and mixing, enzymatic hydrolysis and fermentation culturing are performed in the same fermentation tank, processes and devices for producing starch and glucose in the prior art are eliminated, repeated treatment of waste water produced in the production process and energy consumption are avoided, the flow is more economic and reasonable, and the resource utilization ratio can be effectively increased. By adopting a candida lipolytica strain with high phycite yield, screened with the method, the phycite yield can be increased by about 2 percent.

Description

technical field [0001] The invention belongs to the field of microbial fermentation, and in particular relates to a new method for fermenting and producing erythritol by using corn flour as a starting material. Background technique [0002] Erythritol is widely distributed in nature, such as fruits, mushrooms, lichens, etc. In addition, it also exists in fermented foods and mammals, and is a natural sugar. Industrially, erythritol is a white crystal obtained by fermentation of glucose. It has a sweet taste, 70%-80% of the sweetness of sucrose, and its calories are only 0.2kcal / g. Erythritol is a four-carbon sugar alcohol with a melting point of 118-122°C, a cracking temperature of 329°C, and a molecular formula of CH 4 o 4 h 10 , the chemical structure is: [0003] [0004] Erythritol has unique nutritional properties, has relatively high digestibility, and is easily absorbed by the small intestine; erythritol does not affect blood sugar and insulin levels, so it is ...

AI Technical Summary

Problems solved by technology

[0019] From the perspective of energy consumption, each production process requires repeated energy-consuming operations such as drying and concentration, which consume a lot of energy.

From the perspective of environmental protection and wastewater treatment, each production process produces a large amount of industrial wastewater, which requires wastewater treatment before discharge, resulting in increased product costs and increased pressure on environmental protection

From the perspective of effective utilization of resources, each processing process will produce by-products and certain losses, and the overall resource utilization efficiency is not high

[0020] In addition, the existing sterilization process of erythritol production adopts plate-and-frame filtration and adding activated carbon for decolorization. The waste bacteria cannot be recycled, and the waste bacteria are discharged to the sewage treatment plant for biological treatment, resulting in a large amount of pollutant discharge

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