What is a real biodegradable plastic?
What is a real biodegradable plastic?
Degradable plastic is a big concept. It is a plastic that, under specified environmental conditions, after a period of time and contains one or more steps, causes a significant change in the chemical structure of the material and loses certain properties. Among them, light-degradable plastics and thermal oxygen-degradable plastics are ruptured plastics and should not be attributed to biodegradable plastics. Degradable plastics should be tested using standard test methods that can reflect changes in performance, and their category should be determined according to the degradation method and life cycle. Biodegradable Trash Bags Regardless of the type of degradable plastic and its degradation environmental conditions, but generally speaking of degradable plastics, it does not mean that such plastics can be completely degraded into substances that are not harmful to the environment.
Biodegradable materials include biodegradable natural polymer materials such as cellulose, starch, paper, etc., as well as biodegradable plastics obtained by biosynthesis or chemical synthesis.
Biodegradable plastic refers to the degradation caused by the action of microorganisms in nature under natural conditions such as soil and/or sand, and/or specific conditions such as composting conditions or anaerobic digestion conditions or in aqueous culture fluids. Eventually it is completely degraded into carbon dioxide (CO2) or/and methane (CH4), water (H2O) and mineralized inorganic salts of the elements contained therein, as well as new biomass (such as microbial dead bodies, etc.).
It should be noted that every kind of biodegradable material, including paper, requires certain environmental conditions for its degradation. If the degradation conditions are not available, especially the living conditions of microorganisms, its degradation will be very slow; at the same time, not every kind of Biodegradable materials can quickly degrade under any environmental conditions. Biodegradable Shopping Bags Therefore, when dealing with biodegradable materials, we should start from its environmental conditions and analyze the structure of the material itself to determine whether it is a biodegradable material. How to judge whether a material is biodegradable, the international and China have issued a series of testing method standards, which are answered in the standard question.
What is compostable biodegradable plastic?
Composting is an aerobic treatment method to produce compost. Compostable refers to the ability of materials to be biodegraded during the composting process. A material including paper, plastic, etc., if it is declared to have compost ability, it must be stated that the material is biodegradable and disintegrable in the composting system (as shown in the standard test method), and is completely biodegradable in the final use of the compost . Biodegradable Courier Mail Bags Compost must meet relevant quality standards. Quality standards such as low heavy metal content, no biological toxicity, and no distinguishable residues.
What is the difference between industrial composting and household composting?
Degradable Plastics Committee: Fertilizer is an organic soil conditioner obtained by biological decomposition of a mixture. The mixture is mainly composed of plant residues, and sometimes also contains some organic materials and certain inorganic substances. The raw materials for composting can be organic solid wastes in urban and rural areas, such as agricultural crop stalks, farming manure in rural areas, urban household garbage, kitchen waste, municipal sludge, and food industry waste residue. Composting, a treatment method for producing compost, is to use microorganisms that are widespread in nature to control the biochemical process of transforming degradable organic matter in solid waste into stable humus. Biodegradable Straw Composting can be divided into aerobic composting and anaerobic composting according to the process of microbial growth and whether it is oxygenated. Aerobic composting is the process of decomposing organic matter in the presence of oxygen. The final products are CO2, H2O, and heat. And humus, anaerobic composting is under anaerobic conditions, anaerobic microorganisms degrade organic matter into CH4, CO2, H2O, heat and humus. Generally speaking, composting refers to aerobic composting.
Industrialized composting refers to the process in which microorganisms degrade solid and semi-solid organic substances in aerobic medium or high temperature under controlled conditions to produce stable humus. Biodegradable clothing bags The general cycle is 180 days, but with changes in aerobic composting technology, the shortest time is 30 days or even shorter.
Household composting refers to the aerobic composting process that mainly uses household kitchen waste or garden waste to produce compost for home use. Household composting takes longer than industrial composting, but generally it does not exceed one year.
Whether it is industrialized composting or household composting, the organic waste handled should have the following characteristics:
a) Biodegradability (ie the original biodegradability of the material);
b) Disintegration performance during composting;
c) Will not adversely affect the biological decomposition process;
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