A low-carbon, environmentally friendly sugar production method based on co-production of sugar cane sugar alcohol

Abstract

The invention provides a cane sugar alcohol co-production low-carbon and environmental-protection sugaring method based on a solid fermentation technique. The method comprises a low-energy-consumption high-quality cane sugar production procedure and a procedure of fermenting and transforming sugar solid, which is residual in molasses and bagasse, into alcohol. By-products can be utilized by the following steps: carbon dioxide generated in the solid fermentation procedure is taken as a clarifying agent applied to cane juice purification; fermentation dregs generated in a solid distillation procedure can be applied to power generation in a bagasse power plant or fodder; waste steam from the bagasse power plant is applied to alcohol separation and / or cane juice in the solid distillation procedure. According to the low-carbon and environmental-protection sugaring method, cane sugar in sugarcane can be utilized to the maximum extent, the production costs of the cane sugar and the energy consumption are reduced, sugar is produced, and alcohol fuel is also produced; due to a solid fermentation technique, the quantity of organic sewage generated in the production procedure is reduced; the by-products, such as the carbon dioxide, the fermentation dregs and the waste steam, can be comprehensively utilized.

Description

technical field [0001] The invention relates to the technical fields of food, biomass energy and chemical industry, in particular to a low-carbon, environmentally friendly method for preparing high-quality sucrose based on sugar cane sugar production and solid fermentation to prepare ethanol. Background technique [0002] In the general sucrose production process, the sugarcane needs to be squeezed 6 times, and the sucrose concentration in the virgin juice is about 20%. In order to recover the residual sucrose in the bagasse, it is necessary to add about 20% of the water for continuous washing and pressing for 5 times, and finally The sugar concentration in the solution is about 15%, and then evaporated and concentrated to a concentration of 65% before crystallization. Therefore, the sugar industry is a high-energy-consuming industry. Even if it reaches the international advanced level, the electricity consumption and standard coal consumption per ton of sucrose production a...

AI Technical Summary

Problems solved by technology

This process not only has high cost and high energy consumption, but also produces high-concentration organic wastewater. The three wastes must be effectively treated in order to meet the discharge standards, which not only increases the process steps but also increases the cost of ethanol

[0004] Most of the current solid-state fermentation technology still uses the traditional wine-making process, which is carried out in a fixed fermentation tank or fermentation tank, which belongs to intermittent operation, and the wine gas is easy to volatilize and the production efficiency is low.

However, crushed straw materials are entangled with each other, so it is difficult to achieve continuous flow, and the uncertainty of their movement also brings difficulties to monitoring

[0005] In the Chinese patent application publication CN 1594584A, the inventor disclosed a method for the co-production of chemical products by solid-state fermentation of sugar cane and its comprehensive utilization, but did not specifically introduce the solid-state fermentation method and the effect that can be achieved