Wet rubbish refers to perishable garbage, usually kitchen waste. The plastic bag is not easy to rot and is not easy to degrade. It is dry garbage.
Note that just because the plastic bag is dry garbage, when throwing garbage, everyone should break the garbage bag, put the wet garbage inside into the wet garbage trash can, and put the plastic bag into the garbage bin of the dry garbage. .
Plastic bags are non-recyclable
Disposable plastic bags are made from polyethylene and polyvinyl chloride. Some of them also contain environmental hormones such as plasticizers and phthalates. If they are exposed to high temperatures, they will react chemically, which will cause harm to human body. The substance, phthalate, has a serious impact on human reproductive health and immune function. Moreover, there are residues or contaminants on the discarded plastic bags that are difficult to remove. It is not recyclable if it contains excessive bacteria or carcinogens.
Why waste plastics can be recycled while plastic bags cannot be recycled
We know that recyclable waste is mainly: waste plastic, glass, metal, paper, cloth. So why are the plastic bags not placed in recyclable trash?
In principle, plastic bags can be recycled and reused. Many supermarkets have printed recyclable labels on their shopping bags! Without recycling, the difficulty of recycling mainly considers economic benefits and other factors.
Plastics can be divided into thermoplastics and thermosets according to their processing properties. The difference between thermosetting and thermoplastics is like ceramics and glass. One can not be melted after heating, and the other can be melted after heating. This feature allows thermoplastics to be easily reused. Recycled plastics are mainly made of thermoplastics. PVC, PMMA, PS, PA, PE, PP, ABS, POM, PC, PPO, PPS, etc.
Degradable plastics are divided into: photodegradable plastics (incorporating photosensitizers in plastics to gradually decompose plastics under sunlight); biodegradable plastics (which can be completely decomposed into low by natural microorganisms such as bacteria, molds and algae) Molecular compound); water-degradable plastics (adding water-absorbing substances to plastics, they can be dissolved after being discarded in water, mainly used for medical and sanitary appliances for easy destruction and disinfection)
Most of the plastic bags that are currently available on the market are non-degradable thermoplastics (degradable and will not be reused!) and can be recycled.
However, the current classification of domestic waste is unknown (only the use of recyclable, non-recyclable classification is not enough), low recycling efficiency (low-cost plastic bags are easy to obtain, high recycling costs) and other factors make recycling progress difficult, most of them with Domestic garbage is mixed and landfilled or incinerated.
Plastic bag garbage disposal method
Plastic bags This kind of garbage is suitable for landfill, composting and incineration.
Plastic bag pollution is also called white pollution, and white pollution is a disposable plastic package that is difficult to degrade. Such as disposable foam fast tableware and our commonly used plastic bags, etc., it is very serious to the environment, buried in the soil is difficult to decompose, will lead to soil capacity
Drop, if burned, it will cause air pollution. Therefore, China has been advocating not using plastic bags, and should use more bags.
Environmental damage caused by plastic bags
1. The raw material of the plastic bag is a polymer compound, which has a stable structure and is not easily degraded by natural microbial bacteria. The non-degradable plastic bag naturally rots for more than 200 years. If the waste plastic bags are not recycled, they will be mixed in the land, causing soil compaction, affecting the absorption of nutrients and water by the crops, resulting in reduced crop yields.
2. Abandoned waste plastic bags in land and water will be swallowed by animals and fish as food, causing death and affecting the growth of animals and fish.
3. Seriously pollute the environment and increase the workload of sanitation workers. Every day in the windy weather, plastic bags are flying all over the sky, some hanging on the treetops, some hanging on the wires, it is time-consuming and laborious to remove. If it is burned at will, it will emit toxic gases, pollute the air and affect people's health.
4. Non-renewable energy resources are expensive. It is understood that the annual consumption of plastic bags in China requires about 1.6 million tons of plastics. The annual production of plastic bags in the country consumes more than 4.8 million tons of oil. The excessive use of plastic bags will have a negative impact on China's energy resources and the environment. . At present, the rising international oil prices are bound to promote China's industrial and agricultural production costs and prices in Shanghai, which is extremely unfavorable to the country and the people's livelihood.
5. Seriously endanger human health. The polyvinyl chloride monomer, which is the main component of plastics, is absorbed and damages the nervous system, liver and kidneys. When the plastic burns, the smoke released contains a large number of carcinogenic compounds.
