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At present, most of the sugar producing enterprises in China are still dominated by the sulphite process, and the white sugar produced contains a small amount of sulfur. In developed countries, membrane filtration and ion exchange technologies are commonly used in the sugar industry, and products do not contain sulfur. Strong market competitiveness.
The sugar industry in China has long been trapped by severe environmental pollution. Taking Guangxi as an example, over 30 million tons of sugarcane are pressed annually, 1 million tons of waste molasses and about 3.3 million tons of bagasse (absolutely dry) are produced during sugar processing of sugarcane. The vast majority of waste molasses is used to produce alcohol and can produce more than 200,000 tons of alcohol, but at the same time it produces 3.1 million cubic meters of alcohol waste. At present, the alcohol waste produced by many sugar enterprises in Guangxi is simply treated and even discharged without any treatment, causing serious pollution to rivers. At the same time, enterprises that use bagasse for papermaking use the alkaline pulping process to produce large quantities of black liquor. Small paper mills sometimes directly discharge these black liquors and become the main local pollution load.
In foreign countries, sugar cane industry and its deep processing, in addition to extract sugar cane juice production of sugar, bagasse can produce pulp board and refined wood, molasses can produce alcohol, alcohol waste can produce feed yeast and compound fertilizer, pulp and paper plate with alkali recovery, at the same time, Sugar-producing companies can give full play to the advantages of self-provided thermal power plants, and provide water, electricity, and steam on the basis of self-sufficiency of hydropower and steam.
At present, the proportion of sucrose non-food use through chemical or biological means is also increasing gradually. Since the 1960s, some sugar-producing countries in Europe and the United States have set up agencies specializing in sucrose research and have studied more than 10,000 compounds or intermediate products. If sucrose is used as a raw material, lactic acid can be produced before fermentation, and a post-production lactate polymer can be used to make various degradable products. It can be used to make pollution-free plastic utensils, packaging materials and detergents, as well as surfactants and detergents. Agents, plastics, medicines, pesticides and other products.
In recent years, the national and Guangxi Guishen shares have invested 3.65 billion yuan, focusing on the construction of 12 projects, many of which are implemented in Guisui shares. The Sucrose Chemical Industry Park, which is mainly composed of sugarcane field system, sugar system, alcohol system, papermaking system, cogeneration system, and comprehensive environmental treatment system, was initially established, and sugarcane-sugar-sugar bagasse pulp and paper was developed and formed. Eco-chain, sugarcane-sugar-waste molasses to alcohol-alcohol waste to make compound fertilizer ecological chain, sugarcane-sugar-fructose-fructose eco-chain, as well as use of sugar workshop filter mud, alkali recovery workshop white mud to produce cement, use Fly ash made of concrete blocks and other industrial ecological chains achieved full resource sharing, turning negative pollution benefits into positive resource benefits. In the field of industrial symbiosis of sugar making, papermaking, alcohol, cement, light calcium carbonate, and compound fertilizer, it has a number of international and domestic leading environmental protection independent intellectual property rights.
Currently, Guigui Group has 1 million tons/year of refined sugar capacity, 500,000 tons/year of household paper capacity, and 200,000 tons/year of fuel alcohol capacity, and has developed fructo-oligosaccharides, yeast extracts, and advanced ruminant animal feeds. Bioengineering products form an economic scale with an annual sales income of 10 billion yuan and profits and taxes of 3 billion yuan, and become an ecological sugar industry group with strong international competitiveness in science, industry, agriculture and trade.
Sugar production includes sugar cane planting, harvesting, processing, product sales, warehousing and many other aspects. The sugar factory is actually an organic chemical plant. Among them, a new process for sugarcane juice clarification membrane filtration, a new technology for desulfurization and decolorization of syrups, treatment of alcohol waste from sugar plants, closed-cycle water for sugar plants, sugar alcohol conversion, monosodium glutamate fermentation by sucrose, high-pressure hydrocracking of sucrose to glycerol, and pharmaceutical grade sucrose The development and deep processing of sucrose esters is a complex system project. However, in our country, there is still a certain gap between the level of production technology and developed countries, and there is an urgent need for breakthroughs in terms of production technology, environmental protection, and applications. The road to circular economy should become the trend of future development.