White pollution is a unique environmental pollution in China. A large number of discarded plastic products can be seen everywhere in various public places. They come from nature and are made by human beings, but when they finally belong to nature, they are not easily absorbed by nature, thus affecting the ecological environment of nature. From the perspective of saving resources, plastic products should be recycled as much as possible, because the main source is exhausted oil resources, but the production cost of recycling at this stage is much higher than the direct production cost, which is difficult to do under the current market economy conditions. Facing the increasingly serious problem of white pollution, people hope to find a plastic substitute, which can replace the existing plastic properties without causing white pollution. Degradable plastics came into being. The characteristic of this new functional plastic is that after reaching a certain service life, its chemical structure will degrade obviously under certain environmental conditions, which is harmless or less harmful to the natural environment. For example, starch-filled plastics, first of all, the starch contained in it is rapidly decomposed by amylase secreted by microorganisms in the soil in a short time, which leads to the decline of the mechanical properties of the film. At the same time, the self-oxidant added in the formula reacts with the metal salt in the soil to generate peroxide, which breaks the chain of polyethylene and degrades it into small pieces that are easily swallowed by microorganisms, which are absorbed by the natural environment and play a role in improving the soil.

Domestic waste refers to solid waste generated in daily life or activities providing services for daily life, and solid waste regarded as domestic waste according to laws and administrative regulations.

Garbage classification refers to the classification of garbage into several different categories according to different components, attributes, utilization value and environmental impact, and according to the requirements of different disposal methods.

Domestic garbage can generally be divided into four categories: recyclable garbage, kitchen garbage, harmful waste and other garbage. At present, the commonly used garbage disposal methods mainly include comprehensive utilization, sanitary landfill, incineration and composting.

Recyclable garbage includes paper, metal, plastic, glass, etc. Through comprehensive treatment and recycling, pollution can be reduced and resources can be saved. If every 1 ton of waste paper is recycled, 850 kilograms of paper can be made, 300 kilograms of wood can be saved, and pollution is reduced by 74% compared with the same output; Every 1 ton plastic beverage bottle can recover 0.7 tons of secondary raw materials; Every recovered 1 ton of scrap steel can produce 0.9 tons of steel, which saves 47% cost compared with ore smelting, reduces air pollution by 75%, and reduces water pollution and solid waste by 97%.

Kitchen waste includes food waste such as leftovers, bones, vegetable roots and leaves. After in-situ composting by biotechnology, 0.3 tons of organic fertilizer can be produced per ton.

Hazardous wastes include waste batteries, waste fluorescent tubes, waste water silver thermometers, expired drugs, etc. These wastes need special safety treatment.

Other wastes include bricks and tiles, waste residue, toilet waste paper and other wastes that are difficult to recycle. Sanitary landfill can effectively reduce the pollution of groundwater, surface water, soil and air.

Classification of medical wastes.

Disposable medical devices after use, whether the needles are cut or not, and whether they are contaminated by body fluids, blood and excreta of patients, are all medical wastes and should be managed as medical wastes.

All kinds of glass (disposable plastic) infusion bottles (bags) that are not contaminated by patients' blood, body fluids and excreta after use are not medical wastes and need not be managed according to medical wastes. However, this kind of waste cannot be used for its original purpose when it is recycled, and should be used for other purposes according to the principle of not endangering human health. The ball is our home and provides us with such a beautiful environment. However, with the rapid development of social economy and the high concentration of urban population, the output of domestic garbage has gradually increased, and our home is surrounded by garbage.

General domestic waste can be divided into five categories: waste paper, plastic, glass, metal and biological waste. The main hazards of garbage to human life and environment are:

First, it occupies too much land. Garbage piled up in the suburbs of the city occupies a lot of farmland. Garbage stays in nature for a long time: cigarette butts and woolen goods 1-5 years; Orange peel for 2 years; 80- 100 cans; Plastics 100-200 years; Glass 1000.

Second, pollute the air. Garbage is a complex mixture. In the process of transportation and open-air stacking, the decomposition of organic matter produces stench, which releases a lot of pollutants such as ammonia and sulfide into the atmosphere, including 100 kinds of volatile organic gases, which contain many carcinogens and teratogens. Plastic film, paper scraps and dust fly with the wind, forming "white pollution".

Third, pollute the water source. Harmful components in garbage are easily washed into underground water by rainwater, and a large number of acidic and alkaline organic pollutants will be produced during garbage stacking or pit filling, and heavy metals in garbage will be dissolved. If garbage is directly thrown into rivers, lakes or oceans, it will cause more serious pollution. Look: plastic bottles and lunch boxes floating on the surface of Qinhuai River, plastic bags and bread paper hanging on the branches. Not only causes environmental pollution. And if animals eat white garbage by mistake, it will not only harm health, but even die.

Fourth, fire hazards. Garbage contains a lot of combustible substances, which will produce methane and other combustible gases during natural stacking. In case of open fire or spontaneous combustion, it is easy to cause fire and garbage explosion accidents, causing heavy losses.

Fifth, the nest of pests. Garbage not only contains pathogenic microorganisms, but also provides food, habitat and breeding places for mice, birds and mosquitoes and flies, and is also the root of infectious diseases.