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Disposable environmental degradation tableware

At present, there are no ASTM standards for biodegradable materials, including the following methods for the evaluation of biodegradability. Soil burying method: there are two kinds of soil burying methods: outdoor soil burying method and indoor soil burying method. The microbial source is mainly the microbial community in the soil. After a certain period of time, take out the sample to determine its weight loss and mechanical properties, or use the electron microscope to determine its invasion by the microorganisms in the soil. The advantage is that it can reflect the biodegradation performance in natural environment; the disadvantage is that the test cycle is long, the test results are different due to different soil, and the repeatability is poor. In the quantitative method of Petri dish culture, the test sample and nutrient agar were added into the container and inoculated with microorganisms for culture. After a certain period of time, the weight loss of the sample and some physical or chemical changes were analyzed. The advantages are rapid degradation, test results can be obtained in a short time, good repeatability and good quantitative; the disadvantages are that it can not reflect the actual situation in nature. Enzyme analysis method: add buffer solution and test sample into the container, let the enzyme act for a certain time, analyze the weight loss of the sample, visually observe the growth of mold, and analyze the change of physical or chemical properties of the sample by microscope. The advantages are short test period, good repeatability and good quantitative; the disadvantages are that it can not reflect the actual situation in nature.

In the radioactive C14 tracer method, the polymer product is labeled with C14, and CO2 is produced under the action of microorganism, which is absorbed by alkaline solution. The total amount of CO2 is measured by titration method, and then the amount of CO2 in C14 is measured by radioactive decay rate method. The degree of microbial erosion is expressed by the percentage of CO2 in C14. The advantage is that the experimental results are credible and clear. Biodegradability test can detect the biodegradability of samples. Biodegradable materials manufacturers, recommend you choose Kang duoheng bio environmental protection. Anhui kangduoheng bio Environmental Protection Technology Co., Ltd. is mainly engaged in the R & D and production of biodegradable materials, all biodegradable materials, biodegradable granules, corn starch and starch biodegradable materials. It is a professional company dedicated to the field of new green environmental protection materials, integrating technology R & D, standardized production and marketing.