来源网址：http://www.rsoau.com 2019-05-31 15:01:41
Is it really environmentally friendly to use biodegradable lunch boxes?
In recent years, many tableware products without biodegradable materials have appeared in the market. Some take-out restaurants offer customers the choice of using environmentally friendly tableware when ordering. But when you choose biodegradable tableware, do you really contribute to the environment?
First, let's look at the biodegradable materials:
The emergence of biodegradable materials has broken the traditional impression that plastics = 10,000 years ago) = pollution. As the name implies, degradable materials can be degraded into small molecules under certain conditions after a certain period of time. According to the degradation mechanism, it can be divided into three categories: photodegradable materials, biodegradable materials and photobiodegradable materials.
In the early stage, degradable components or photosensitizers, such as starch, were added to traditional plastics without affecting their functions. Under natural conditions, biodegradable components are degraded first, thus destroying the whole product structure, which is not only conducive to reducing the "flying all over the sky" of plastic bags, but also conducive to accelerating the degradation of refractory components. But this material is not completely degradable, and it may take a long time to degrade completely.
Next, we will introduce biodegradable food box materials in our life.
Starch-based plastics are the most common biodegradable materials in our lives, such as disposable tableware. If you have the right tools, its main ingredient, starch, can also be made from starch in your kitchen.
At first glance, biodegradable materials,它看起来真的是零浪费，零污染，
It really looks like zero waste, zero pollution.
But is that true?
Imagine this scene, 11 a.m. office hungry, you open the takeaway application, choose a favorite egg fried egg fried rice, the most important thing is that you finally check the use of environmental protection box, suddenly feel bumped into Darai, and today to the environmental protection business, then your all the same egg fried rice cover in the nearest trash can throw, extend the thumb, continue to give you action! All the garbage bags were collected and thrown into the garbage room downstairs. Late at night, the garbage truck carries the dry garbage from the garbage house. This is the end of the story. Did you find any bugs?
Although you ordered fried rice with eggs packed in biodegradable materials, because of your "joy" and "shutdown", you threw the remaining food (wet waste) and biodegradable recyclable lunch boxes (recyclable waste) into a dry trash can together. Then your biodegradable tableware will follow the ordinary trash truck to the ordinary incinerator for ordinary incineration power generation. Congratulations on your donation of lunch boxes (Daily Task: 1/1 of the materials required for incineration) to the national power plant.
So where will biodegradable tableware end up?
At present, the goal of solving garbage problem in China is to reduce garbage, recycle and dispose of it harmlessly. There are three main methods: sanitary landfill, composting and incineration.
Recyclable garbage destinations because most citizens do not have good garbage sorting habits, at the source of garbage disposal, all garbage is put into garbage bags, and then sent by a dry garbage collection vehicle to the garbage disposal plant for disposal in the incinerator.
Recyclable waste destination II. Because garbage collection and recycling systems in some cities are not yet mature, some citizens can accurately classify recyclable garbage, dry garbage and wet garbage, but only one type of vehicle can collect and transport them. So the truck mixes all the garbage together, carries it to the factory, and finally to the incinerator.
"That's why most citizens are reluctant to classify garbage. They think their efforts are in vain because of the imperfect collection and transportation system." Recyclable waste destinations in China regard environmental protection as a policy, and many cities have begun to clean up their health systems. For example, Tianying Group launched a pilot project of "dual-network integration" in Hongkou District, Shanghai, and implemented an incentive mechanism for recyclable garbage collection stations to encourage citizens to classify garbage. Such a good climate promotes the treatment of domestic waste from the source to the end into a virtuous and orderly cycle. Recyclable items such as metals, plastics, paper and glass need to be sent to appropriate recycling plants. Wet garbage is effectively composted, while dry garbage incineration reduces the burden of the power grid.
In fact, in the end, there is no clear answer to the question whether biodegradable food boxes are environmentally friendly, but it is certain that garbage sorting is a small thing we can do by hand, but it has far-reaching significance. Especially those who live in cities with perfect garbage collection, transportation and disposal systems, please do not let down the efforts of the government and environmental protection workers, change habits and do a good job of garbage classification from now on!