Views:37 Author:Site Editor Publish Time: 2020-09-12 Origin:Site
Sugarcane is one of the main raw materials for sugar production. About 50% of the fiber can be used to make paper from the sugarcane bagasse, the vascular bundle of sugarcane remaining after sugar extraction. However, some of the cane pith (myeloid cells) has no intertwining power and should be removed before the pulping process. The length of bagasse fiber is about 0.65-2.17mm, and the width is 21-28μm. Although its fiber shape is not comparable to wood and bamboo, it is slightly better than rice and wheat straw fibers. The slurry can be mixed into some wood pulp to make offset printing paper, cement bag paper, etc.
In fact, sugarcane bagasse is the scum from the squeezing process of sugarcane sugar. It has a rough texture and accounts for about 24% to 27% of sugarcane (with water content of about 50%). For every ton of cane sugar produced, 2 to 3 are produced. Tons of sugarcane bagasse. Approximate analysis of wet bagasse shows that bagasse is rich in cellulose, but less lignin, so bagasse has great advantages as a fiber raw material.
The substance can be prepared from the waste residue of sugar making by fermentation method, and the preparation method and use thereof. It contains a lot of beneficial bacteria and active substances, including water-soluble humic acid ≥14%, crude protein ≥6.5%. The product has a strong effect on increasing water body fertilization, can detoxify and purify water, promote the growth of algae, improve and activate the bottom of the water body, increase the dissolved oxygen in the water body, and reduce the diseases of fish, shrimp, crabs and shellfish. The method uses sugarcane bagasse as the main material, wheat, peanut cakes and a small amount of chemical fertilizer and minerals as auxiliary materials, and adds an aqueous solution containing a special ratio of bacterial flora. The fermentation process controls the temperature of the fermentation chamber to be below 75°C. It is dried below 75°C and then pulverized into 100-200 mesh powder to make the product have high water-soluble humic acid content and high activity.
The cellulose in sugarcane bagasse can be converted into sugar to make alcohol or feed yeast. Brazil’s technology for ethanol production from bagasse developed in 1980 has taken the lead in the world and has registered patents in many countries. The use of new technology can extract 100 liters of alcohol from each ton of bagasse, so that the alcohol output of sugarcane can be reduced by The increase from 7,740 liters to 13,800 liters, can double the output of alcohol (14.8 billion liters in 2003/2004) without expanding the planting area of sugarcane, and reduce the cost by 40%.
Over the years, many scholars at home and abroad have devoted themselves to the development and research of by-products from sugar mills as feed, and have achieved certain results. For example, an animal husbandry research institute in the United States invented a method of processing bagasse into high-protein feed after ammoniating. The specific method is: mix bagasse with urea or amide (100:2 aqueous solution), soak the sugarcane bagasse completely, steam it in a heating pot under a pressure of 14kg for 2 hours, and mix when the temperature is cooled to about 25°C after being out of the pot It is fermented with yeast, the gas produced is discharged clean after fermentation, and the bagasse is dried and ground into fine powder before it can be used as feed. Sugarcane bagasse can also be used for the production of edible fungi. Because bagasse is acidic, lime and gypsum can be added appropriately to increase alkalinity. Add bran and other high-nitrogen auxiliary materials.
Papermaking: At present, there are mature technologies that use bagasse as a substitute for wood to produce biodegradable paper cup base paper, fully degradable paper agricultural mulch, and paper disposable catering. Among them, the fully degradable paper agricultural mulch is made of 100% sugarcane bagasse pulp, which can be recycled for papermaking and can be naturally degraded. It can solve the white pollution problem caused by the use of polystyrene tableware for many years. It is considered to be the most promising New achievement; sugarcane bagasse containers has high whiteness and compactness, good temperature and oil resistance, non-toxic and tasteless, completely degradable within three months, no three wastes pollution in the production process, and significantly lower production costs Molded fast food boxes in pulp.
The chemical composition of high-density composite bagasse is similar to wood, and it is a good raw material for board making. Use sugarcane bagasse resources to produce high-density composite materials. Due to the small specific gravity of bagasse and good fiber quality, the prepared boards have high strength and light weight, and the boards and profiles produced are not subject to biological damage, low water absorption, and not corroded by seawater; good fire resistance and good resistance Combustion performance, good mechanical processing performance and decorative performance, suitable for furniture, construction, carriages, ships, packaging boxes and other manufacturing industries. The product has strong plasticity, replacing different molds or templates, directly producing a variety of plates and profiles, which has great market value. The realization of high-density composite material technology not only solves the pollution discharge problem of agricultural waste and urban waste, but also saves limited forestry resources.