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Can biodegradable plastics such as PCL and PLA be degraded in sewage?
The biodegradability of PLA is neither unconditional nor completely harmless to the environment. The biodegradation of polylactic acid needs to meet two basic conditions: 50%-60% humidity and 50-70 degrees Celsius temperature. Under these conditions, microorganisms may gradually decompose PLA in a few months or even longer. Looking at this problem from another angle is that PLA cannot be degraded in an environment that does not meet the temperature and humidity conditions.

This product is still made of 100%PLA, and it is often more difficult to degrade if it is to improve its temperature resistance and other characteristics.

In other words, it needs to be recycled separately, then classified and then composted commercially for several months before PLA can be degraded. This undoubtedly requires huge energy costs. As for the degradation in nature, it is nothing more than the misunderstanding of the public because the manufacturer did not specify it.