欢迎光临安徽鑫科生物环保有限公司官方网站!

生物降解颗粒降解过程全介绍以及分类

生物降解颗粒降解过程全介绍以及分类

来源网址:https://www.swjjkl.com/ 2021-04-19 15:01:30    

由于塑料对环境严重污染越来越严重,生物降解颗粒的出现逐渐取代以石油为基质的传统塑胶材料,带来了更长久的发展,它丢弃后经堆肥环境及掩埋处理由微生物完全分解,那么生物降解颗粒降解过程是什么样?降解周期是多久?

Due to the serious pollution of plastics to the environment, the appearance of biodegradable particles has gradually replaced the traditional plastic materials based on petroleum, which has brought a more long-term development. After it is discarded, it is completely decomposed by microorganisms through composting environment and burial treatment. What is the degradation process of biodegradable particles? What is the degradation period?
生物颗粒降解原理
Degradation principle of biological particles
通过光或微生物将塑料大分子链切断变成小分子,变成水和二氧化碳消失于自然界,这一过程称之塑料降解过程。
Through light or microorganism, the macromolecular chain of plastics is cut off to become small molecules, and water and carbon dioxide disappear in nature. This process is called plastic degradation process.
其中淀粉基塑料是目前国内外较为普遍的生物降解塑料,以淀粉向微生物生存和繁殖提供养分,同时微生物以淀粉颗粒点为突破口使塑料制品力学性能下降造成制品崩裂,达到降解的目的。
Starch based plastics are the most popular biodegradable plastics at home and abroad. Starch is used to provide nutrients for the survival and reproduction of microorganisms. At the same time, microorganisms use starch particles as a breakthrough point to reduce the mechanical properties of plastic products, resulting in the disintegration of products, so as to achieve the purpose of degradation.
生物颗粒降解降解过程
Degradation process of biological particles
首先生物降解塑料被扔到大自然中,经过一定条件(土壤、沙土、堆肥、厌氧、水性培养液等),自然分解为小块,实质就是高分子断裂的过程,再经过外界条件的摧残,分解为大分子,再分解为小分子,被微生物吸收后,释放二氧化碳和水,同时植物通过光合作用,释放出氧气。
First of all, biodegradable plastics are thrown into the nature. Under certain conditions (soil, sandy soil, composting, anaerobic, water-based culture medium, etc.), they are naturally decomposed into small pieces. In essence, it is a process of polymer fracture. Then, after the destruction of external conditions, they are decomposed into macromolecules, and then into small molecules. After being absorbed by microorganisms, they release carbon dioxide and water. At the same time, plants cooperate with each other through photosynthesis Use it to release oxygen.
生物颗粒降解降解周期
Degradation cycle of biological particles
由于在自然界的土壤里,温度、水分、微生物等条件不可控,相比可堆肥化过程中条件受控的情况,其条件相对不可控。
Because in the natural soil, temperature, moisture, microorganisms and other conditions are uncontrollable, compared with the conditions controlled in the composting process, the conditions are relatively uncontrollable.
目前从生物降解地膜应用及其实验室和野外降解实验结果看,多数的生物降解塑料在野外土壤条件下是可以生物降解的,像PBAT、PHA、PCL、PBS等在正常气候条件下5个月埋土情况下可以完全降解,且对植物不会造成影响;像PLA材料降解相对较慢,时间较长,但其和PBAT等材料共混后,从实验结果看,也能在半年左右内被完全降解。
At present, from the application of biodegradable plastic film and the results of laboratory and field degradation experiments, most of the biodegradable plastics can be biodegradable in the field soil conditions, such as PBAT, PHA, PCL, PBS, etc., which can be completely degraded under the normal climate conditions and buried in the soil for 5 months, and will not affect the plants; for example, the degradation of PLA material is relatively slow and takes a long time, but it is similar to PBAT The results show that the blends can be completely degraded in half a year.