Specific examples and materials benefiting from the development of science and technology.

With the development of economy, the acceleration of people's life rhythm and the improvement of living standards, the amount of plastics is increasing day by day. From 65438 to 0996, the consumption of plastic packaging in China reached 2.43 million tons, with an average annual growth rate of more than 20%, especially in the garbage of cities, main traffic arteries and tourist attractions. According to the survey, the annual output of domestic waste in Beijing has reached 3 million tons, of which waste plastics account for about 3%, with an annual growth rate of 48%. The content of plastic in garbage in coastal cities is higher, reaching 8- 10%. The volume ratio of these waste plastics in garbage is more than one third, which greatly increases the difficulty and cost of garbage disposal. Because waste plastics are difficult to degrade for hundreds of years, if discarded in the natural environment, it will provide a hotbed for mosquitoes, flies and bacteria to survive and reproduce; If buried underground, it is easy to pollute groundwater, hinder the growth of plant roots, destroy soil quality and affect crop harvest; If you burn with fire, it will produce a variety of toxic gases.

Body. "White pollution" has become a major public hazard to China's social environment, which has seriously hindered the sustainable development of China's economy and environment. At present, the annual consumption of disposable tableware in China is about 654.38+000 billion, mainly foam plastic products. In order to stop the production, sale and use of these large-scale disposable foamed plastic tableware, it is necessary to develop and produce their substitutes, and green disposable tableware came into being. Experts believe that the development and production of green disposable tableware is becoming a new environmental protection industry in China. 65438+In mid-February, the Ministry of Science and Technology, together with the State Economic and Trade Commission, the State Environmental Protection Administration and the Ministry of Railways, jointly held an exchange meeting on the development of green primary tableware technology. At the meeting, the reporter interviewed Wang Zhixue, director of China Rural Technology Development Center, and managers of several production enterprises. Wang Zhixue said: At present, the green disposable tableware developed and produced in China can be divided into pulp, rice husk, straw and starch according to the types of raw materials. There are hundreds of enterprises producing paper disposable tableware in China, with an annual production capacity of about 3 billion pieces. The raw materials of paper tableware are seriously polluted in the production process, with high cost and poor strength, water resistance and moisture resistance. Therefore, its popularization and application have great limitations, so people naturally look elsewhere and ask for benefits from science and technology. If rice husk is used as raw material to produce rice husk tableware, there are now more than a dozen domestic enterprises of this type, with an annual production capacity of about 654.38+0.5 billion; Straw tableware is mainly made of crop straw. At present, there are more than a dozen domestic manufacturers with an annual production capacity of 75 million units. Starch tableware takes potato starch as the main raw material, which has good biodegradability and can be used as feed after recycling. In short, the state attaches great importance to the research and development of green disposable tableware, and gives strong support through scientific and technological development plans such as scientific and technological research, spark plan and torch plan. The production technology of green disposable tableware in many enterprises is mature and has the foundation of industrialization. Wuhan Far East Green World Group Co., Ltd. is a company that uses starch as raw material to carry out scientific research and development of green disposable tableware, and its economic benefits have begun to take shape. Su Xiaohai, the president of the company, had a legendary experience: he studied arts and crafts in Hubei Institute of Light Industry, went to Wuhan University for a master's degree in philosophy from 65438 to 0984, and then studied and worked in Germany. The environmental protection in Europe touched him greatly, and he had the idea of returning to China to engage in environmental protection industry. Su Xiaohai told reporters: I have studied arts and crafts and am an aesthete. Today's commitment to environmental protection such as green tableware stems from the initial understanding of beauty; The extension of aesthetics, in the final analysis, is also a philosophy. 1992 to 1996, the production scale of recycled cardboard disposable tableware and reed pulp molded tableware developed by Far East Green World Company has not expanded due to the low scientific and technological content. From 65438 to 0996, our company sent personnel to inspect the technical situation of biodegradable packaging products in the European market, and thought that developing vegetable starch to produce fully degradable disposable tableware products might be a way to eliminate "white pollution". 1997, composed of a group of experts in food, chemistry and machinery, focuses on the research and development of fully degradable disposable catering products and is included in the national torch plan project 1997. They absorbed foreign advanced technology and combined with the domestic production technology of paper tableware, and made a series of innovations: using starch such as sweet potato and corn, which are rich in domestic resources, as the main raw materials, instead of a single foreign country with higher prices.

Potato starch; Adding 20% natural fiber to sweet potato starch can obviously increase the strength of tableware, and then adopting food puffing processing technology to make the product light and soft. Through surface spraying treatment and setting equipment to increase strength, the produced catering products have waterproof, oil-proof and heat-resistant functions. Su Xiaohai made a vivid metaphor: this is like reinforced concrete in building materials, sweet potato starch is cement, and the roots of all kinds of hay and plants are reinforced after chopping and stirring, so that the strength of tableware can be obviously enhanced.