可降解塑料的使用≠无条件降解

可降解塑料是指使用后在特定自然环境条件下能降解成对环境无害的物质，是一大类降解材料的总称。可降解塑料出现于上世纪60年代，中间经历过与传统塑料混合的发展阶段、通过光热条件降解的阶段，以及通过微生物酶促反应降解的阶段。

Degradable plastics refer to the substances that can be degraded and harmless to the environment under specific natural environmental conditions after use. It is the general name of a large class of degradable materials. Degradable plastics appeared in the 1960s, which experienced the development stage of mixing with traditional plastics, the stage of degradation under photothermal conditions, and the stage of degradation through microbial enzymatic reaction.

可降解塑料与传统塑料混合的材料，只能使传统塑料更易崩解成细小碎片，产生更多的微塑料污染环境，因此不能被认为是可降解的。光热降解塑料的降解性差，受到温度、光照强度等自然条件约束。

The mixture of degradable plastics and traditional plastics can only make traditional plastics more easily disintegrate into small fragments and produce more micro plastics to pollute the environment, so it can not be considered degradable. Photothermal degradable plastics have poor degradability, which is constrained by natural conditions such as temperature and light intensity.

例如埋藏在地下的地膜，会由于没有光照而收效甚微或根本无法分解。因此，只有在生物条件下可降解的塑料，也称生物可降解塑料，才是真正的可降解塑料，才有防治塑料污染的价值。

For example, the plastic film buried underground will have little or no effect due to the lack of light. Therefore, only biodegradable plastics under biological conditions, also known as biodegradable plastics, are real degradable plastics and have the value of preventing and controlling plastic pollution.

人们常存在一个认识误区：可降解塑料可以在任何自然环境中降解。实际上，可降解塑料只有进入特定环境中才具有降解特性，并非在任何自然条件下都可降解。

People often have a misunderstanding: degradable plastics can be degraded in any natural environment. In fact, degradable plastics have degradation characteristics only when they enter a specific environment, and they are not degradable under any natural conditions.

不同的可降解塑料，可以在堆肥、土壤掩埋、淡水等条件下实现塑料降解。但相较于土壤环境，海洋环境存在高盐分、低微生物密度的特点，那些在陆地上可以利用微生物酶促反应降解的塑料制品，往往在海洋环境中就会降解失效。

Different degradable plastics can be degraded under the conditions of composting, soil burial, fresh water and so on. However, compared with the soil environment, the marine environment has the characteristics of high salinity and low microbial density. Plastic products that can be degraded by microbial enzymatic reaction on land are often degraded and ineffective in the marine environment.

可降解颗粒厂家调查得知道，目前可降解塑料和其他垃圾混合进入垃圾焚烧、填埋设施，实际上与传统塑料相比不仅没有环境优势，而且可降解塑料昂贵，总体来看成本效益低。

In fact, compared with other traditional landfill facilities, the price of degradable plastic particles is not only low, but also has no advantages over other traditional landfill facilities.

在焚烧情况下，可降解塑料虽然存在可以生物降解的化学结构，但与传统塑料元素组成区别不大，焚烧之后的碳排放效应和综合环境影响比较接近。在填埋情况下，可降解塑料的生物降解特性，使之进入填埋设施后的碳排放高于传统塑料，综合环境影响会显著高于传统塑料。

In the case of incineration, although biodegradable plastics have biodegradable chemical structure, they are not different from traditional plastics in element composition. The carbon emission effect after incineration is close to the comprehensive environmental impact. In the case of landfill, the biodegradation characteristics of degradable plastics make the carbon emission after entering the landfill facilities higher than that of traditional plastics, and the comprehensive environmental impact will be significantly higher than that of traditional plastics.

此外被送往厨余垃圾处理设施的可降解塑料，根本不会进入设施的发酵环节。绝大多数设施的预处理，会通过多道分选工序剔除塑料制品形状的杂质，进入生物质发酵系统中的剩余可降解塑料制品实际少于5%。

In addition, degradable plastics sent to kitchen waste treatment facilities will not enter the fermentation process of the facilities at all. In the pretreatment of most facilities, impurities in the shape of plastic products will be removed through multiple sorting processes, and the remaining degradable plastic products entering the biomass fermentation system are actually less than 5%.

由于做不到可降解塑料与传统塑料的分类回收，混有可降解塑料的塑料再生制品，其再生价值会降低20%以上。由此来看，大规模使用可降解塑料使之混入现有塑料回收再生体系反而是有害的，降低了塑料制品循环利用效率。

Since it is impossible to classify and recycle degradable plastics and traditional plastics, the recycling value of plastic recycled products mixed with degradable plastics will be reduced by more than 20%. From this point of view, the large-scale use of degradable plastics mixed with the existing plastic recycling system is harmful, reducing the recycling efficiency of plastic products.

更多相关内容就来关注我们的网站吧，让您了解更为详细产品www.qiluxinke.com信息！

For more relevant content, please follow our website to let you know more about our products at www.qiluxinke.com Com information!