White pollution control technology

"White pollution" refers to a large number of used plastic films for packaging, plastic bags and disposable plastic tableware (collectively referred to as plastic packaging), and the used plastic film collectively referred to as "white pollution."
"White pollution" will cause two kinds of harm to the environment, namely "visual pollution" and "potential harm".
Visual hazard refers to the destruction of waste plastic products scattered in the environment on the cityscape and landscape. The waste plastics scattered in big cities, tourist areas, water bodies, and railroads give people unpleasant visual stimulation and affect the overall beauty of cities and scenic spots.
Potential hazards are long-term, deep-seated environmental problems caused by the difficulty of degradation of waste plastic products into the natural environment.
First, waste plastic products affect the absorption of nutrients and moisture by crops in the soil, resulting in the reduction of crop production.
Second, waste plastic products abandoned on land or in water are passively used as food to swallow and cause animal death.
Third, waste plastic products entering domestic waste are difficult to handle. If it is landfilled, it will occupy the land and it will not degrade for a long time. Mixed garbage is also not suitable for composting. Waste plastics sorted out from garbage are of very low value because they cannot guarantee quality.
The governance of "white pollution" is a social system project and should take active measures and use administrative, scientific, and economic means to comprehensively govern. At present, under the premise of strengthening management, formulating relevant policies and regulations, fostering the development of enterprises and institutions that are conducive to environmental protection, raising people’s awareness of environmental protection and grasping the correct orientation of public opinion, we should draw lessons from reductions, recycling, recycling, and degradation of materials. Governance measures, implementation of provincial resources (reduction, reduction), recycling (recycling), detoxification (degradable) and other multiple methods, measures and measures to prevent and control integration.
1. Recycling resources (reductions, reductions) is a good way to prevent problems before they start.
The province's resource reduction (reduction, reduction) is to reduce or suppress the amount of plastic waste generated, including the use of less, you can use as little or as little as possible, or by filling natural organic materials or inorganic materials, reduce the amount of plastic, Or by increasing product quality, increasing functionality, extending life expectancy, and multi-use, reducing the consumption of disposable plastic packaging. Thinning, that is, under the premise of ensuring application performance, by changing the raw material formula and product structure design, the product can be made lightweight and thin-walled. Volume reduction, that is, reducing the volume of plastic waste through compaction, dissolution, defoaming, etc., and developing appropriate packaging to suppress excess packaging.
2. Recycling (recycling) is an important measure for environmentally soundness.
Recycling (recycling) is not only a technical issue, but more importantly, it includes a set of system engineering issues such as legislation, recycling, production, inspection, and sales. It is the active development of various countries to ensure the sustainable development of the national economy, economy, and Effective method of coordination of resources and environment. From the plastic waste in general, a considerable part is easy to recycle. However, for disposable plastic waste, it must be based on the types, quality, quantity, flow direction and disposal methods of wastes from all parts of the country. Recycling and recycling, including materials, heat energy Fuel oil, chemicals, etc., are not only beneficial to the protection of the environment, but also have significant implications from the viewpoint of saving the limited resources of the earth and effectively utilizing renewable resources. However, at present, recycling, regardless of the establishment of a waste sorting, collection, collection system, high-efficiency recycling technology and equipment development, and the product direction of recycled materials, etc., will face many technical and economic difficulties. Increase investment in science and technology, work together as a key issue to study and solve.
3. Harmless (degradable)
In real life, there are many disposable plastic wastes that are difficult to collect, such as compost bags, garbage bags, supermarkets, light-weight plastic bags used in the morning market, or even if they are collected forcibly, with poor economic efficiency or even no benefit such as Chinese food. Cutlery, plastic film, etc. These fields are more suitable for degradable plastics. After ten years of tracking and application practice, the degradable plastics developed in China have the following characteristics: 1 Practicality: Their application performance and hygienic properties are similar or equivalent to ordinary plastics; 2 Degradability: After the completion of the use of functions, they can be in natural environmental conditions. It degrades rapidly and becomes harmless fragments or chips that are easily consumed by the environment. 3 Safety: The substances produced and degraded during the degradation process are harmless to the environment or have no potential hazards; 4 Economical: Price and Similar ordinary plastic products are flat or slightly higher. Therefore, it is recommended to use biodegradable plastics for those large-scale, scattered, dirty, difficult-to-collect, or even mandatory collection of economically unreasonable disposable plastic products. In the short term, biodegradable shreds can be degraded into harmless fragments to achieve plastic waste. To reduce or reduce the amount of pollution, reduce or inhibit the purpose of environmental pollution. And over time, it can eventually degrade completely back to nature.
Polystyrene tableware countries have issued the No. 6 Order, which requires the ban of production by the end of 2000. For this reason, many provinces, cities and departments are increasing their efforts to research and develop various alternative products, such as cardboard cutlery, pulp molded cutlery, and vegetable fiber. Molded tableware, cornmeal molded tableware, starch puff tableware, light/biodegradable polypropylene tableware, polypropylene foam tableware, photo/biodegradable polypropylene tableware, starch filled polystyrene foam tableware, and the like. Progress has been made to varying degrees, but there are still some problems that need further improvement and improvement. This is in line with the development of new products, but no matter which type you must start from reality, focusing on technology, performance, market, price, environmental protection Comprehensive evaluation of such factors, and then combined with macroeconomic policy guidance, the market to test and identify.
Degradable plastics, as high-tech products and environmentally-friendly products, has become a research and development hotspot in today's world. Its development has not only expanded the function of plastics, but also eased the environmental contradictions to a certain degree, and it is also an increasingly exhausting source of petroleum resources. Addition, and from the perspective of synthetic technology, demonstrated the power and prospects of bioengineering and alloying technology in the field of plastic materials. Therefore, the research, development and application of biodegradable plastics, whether from the perspective of environmental protection of the Earth, or from inexhaustible Renewable resources are also of great significance in the academic field of synthetic functional polymers and medical polymers. The research and development of degradable plastics are in the ascendant and they have a long way to go.