Abstract: The present invention relates to a method of preparing xylitol by using a xylose secondary mother liquor through fermentation. In the method, fermentation treatment is performed on a mixed liquid of the xylose secondary mother liquor and a xylose concentrate, and the xylose secondary mother liquor is subsequently batch-fed instead of glucose in the fermentation process. Thus, a glucose content in the fermentation system is stabilized, and some xylose is provided at the same time. In this way, the use amount of glucose and costs are reduced, and the system xylose can be relatively stabilized, thus improving the entire conversion rate. In the present invention, adding the xylose secondary mother liquor by mixed fermentation and batch feeding and the like enables the contents of heterosaccharides such as arabinose and mannose in the fermentation system to be always within a range of metabolization by fermenting strains, facilitating subsequent purification and improving the xylitol purity.

Abstract: The embodiments of the present disclosure provides a method of co-producing erythritol and arabinose by using a xylose mother liquor, wherein an extract and a raffinate are obtained by separating the xylose mother liquor through a first chromatography, the extract is configured to prepare crystallized xylose, the raffinate and the liquid glucose or crystallized glucose are blended and erythritol is produced by using a Yarrowia lipolytica with high osmotolerant and a high conversion rate. erythritol crystals are obtained by centrifugation and crystallization first by using characteristics of low solubility degree and easy crystallization of the erythritol, the arabinose raffinate having a high content of arabinose is obtained by separating a centrifuged erythritol mother liquor through a second chromatography, and arabinose crystals are obtained based on the arabinose raffinate.

Abstract: The embodiments of the present disclosure provides a method of coproducing erythritol and arabinose by using a xylose mother liquor, wherein an extract and a raffinate are obtained by separating the xylose mother liquor through a first chromatography, the extract is configured to prepare crystallized xylose, the raffinate and the liquid glucose or crystallized glucose are blended and erythritol is produced by using a Yarrowia lipolytica with high osmotolerant and a high conversion rate. Erythritol crystals are obtained by centrifugation and crystallization first by using characteristics of low solubility degree and easy crystallization of the erythritol, the arabinose raffinate having a high content of arabinose is obtained by separating a centrifuged erythritol mother liquor through a second chromatography, and arabinose crystals are obtained based on the arabinose raffinate.

Abstract: The present disclosure provides a system and method for a refinement processing of xylitol fermentation broth. The system includes a fermentation component, a filtration and impurity removal component, and a refinement component. The fermentation component is configured to perform a fermentation processing on a raw material containing xylitol to obtain sediments and supernatant fermentation broth. The filtration and impurity removal component includes a ceramic membrane filter, a nanofiltration membrane filter, an activated carbon filter, and ion exchange columns. The ceramic membrane filter is configured to filter the supernatant fermentation broth to obtain ceramic membrane discharge liquid. The nanofiltration membrane filter is configured to perform a nanofiltration membrane filtration processing on the ceramic membrane discharge liquid to obtain nanofiltration liquid.

Abstract: A system and method for producing cellulosic ethanol by biomass saccharification and fermentation is provided. The system includes a first reactor configured to carry out an enzymatic hydrolysis reaction of a biomass feedstock, a second reactor configured to carry out a fermentation reaction of the biomass feedstock, and a collection tank configured to collect the cellulosic ethanol. The first reactor and second reactor are provided with an enzymatic hydrolysis dosing pipe and a fermentation dosing pipe, respectively. An outlet of the first reactor is connected to an inlet of the second reactor through a fermentation pipe. An outlet of the second reactor is connected to an inlet of the first reactor through a discharge pipe that is provided with a first discharge pipe configured to discharge material from the second reactor. The first reactor is connected to an inlet of the collection tank through an ethanol pipe.

Abstract: The present invention relates to a system for jointly producing erythritol and liquid sorbitol by using a corn starch, including a liquefaction tank, a saccharification tank, a filter and a nanofiltration assembly. The liquefaction tank is used to perform liquefaction for the corn starch, the saccharification tank is used to perform saccharification for the liquefied material, the filter is used to filter out impurities in the saccharified material to obtain a glucose liquid, and the nanofiltration assembly is used to perform nanofiltration for the filtered glucose liquid to respectively obtain a dialysate and a concentrate. The system further includes a fermentation and crystallization assembly for performing fermentation and crystallization for the dialysate to prepare crystalline erythritol, and a hydrogenation and evaporation assembly for performing hydrogenation and evaporation for the concentrate to prepare liquid sorbitol.

Abstract: The present invention provides a method of improving a biomass high-solid enzymatic hydrolysis rate. By screening particle sizes of the biomass substrate, different water content controls are performed on coarse and fine particle biomass substrates and then an entire water content of the mixture of the coarse and fine particle biomass substrates is controlled to achieve a reduced initial viscosity of the enzymatic hydrolysis and improve liquefaction speed, and finally improve the biomass high-solid enzymatic hydrolysis rate. The enzymatic hydrolysis system of the present invention can be easily constructed with lower equipment requirements, lower energy consumption, higher enzymatic hydrolysis efficiency and simpler operation process, helping the industrial production and applications.

Abstract: A method and a system are disclosed for implementing video monitoring by a mobile terminal. The method includes a mobile client sending a request for on-demand of a monitoring front end to a media transcoding device directly or through a mobile stream media relay, the media transcoding device receiving said request, then requesting a media code stream of said monitoring front end from a fixed network stream media server, and transcoding and outputting the received media code stream, wherein the media transcoding device presets video transcoding parameters corresponding to various mobile network standards, thereby implementing video monitoring of mobile terminals of various standards.