Technical Approaches to Dealing with Plastic Waste

Faced with the increasingly serious "white pollution has gradually attracted people's attention, a variety of methods have been developed at home and abroad to deal with these wastes, can be summarized as: 1, landfilling; 2, incineration; 3, composting; 4 , Recycling and recycling; 5. Substitution method (ie the development of new types of degradable plastics, pulp molding, plant fiber materials, etc. to replace the existing pollution of plastic products).
In addition to the several types of alternative materials, it is also possible to study and develop multilayer composite films and sheets with high airtight barrier layers such as EVOH (EV/AL) NYLON, PVAPA, and LCP (high-permeability barrier polymer PET). Containers; select breathable and functional fresh-keeping packaging materials; use China's rich resources of kenaf, straw, sand willow, cotton rods and other staple fiber raw materials, research and development of high-grade packaging paper, cutlery paper and high-strength cardboard; through biological fermentation And polymer synthesis technology to produce amino acids, carbohydrates, polyester and other water-soluble or edible packaging materials, containers, so as to effectively control the environmental pollution caused by waste plastics.
From the comparison and analysis in Table 2, it can be seen that the current recycling and recycling are the best ways to deal with “white pollution”. The excellent comments listed in the table are as follows:
Mature technology Degradable plastic products In the production process, the technology is still in the development and research stage. The paper product technology has problems in the manufacturing process, such as the source of raw materials and the sewage discharge in the pulping technology. In contrast, non-degradable material products have the most mature production and recycling technologies.
Low cost In terms of manufacturing cost, plastic products are 10-15% lower than degradable plastic products, and 20-30% of paper products. Even with the added cost, they are still competitive with alternative products.
Compared with the new raw material products, the energy-saving plastic wastes can save 85-90% of the resin energy and save 6-17% of the processing energy.
Profitable waste plastics can be used to make steam (chai) oil, paint, adhesives, advanced asphalt, chemical fiber and building materials. For making paint, one ton of waste plastic can produce 375kg of gasoline and diesel, and produce 150kg of liquefied gas and 100kg of carbon black. If used to make paint, a ton of waste plastic can make a profit of 24-75 yuan. According to calculations, if 20% of the more than 2 million tons of waste plastics are used, a profit of RMB 7 billion can be created, and 600,000 mu of land can be used for landfills.
To reduce pollution, whether it is the use of plastics, degradable plastics or paper products, it will eventually embark on the recovery track, otherwise it will not completely solve the pollution problem, especially the visual pollution of the landscape. The successful operation of the recycling system can reduce "white pollution" to a minimum.