Method for converting biodegradable polymers into humus with a low release amount of CO2 and use thereof

A method for converting biodegradable polymers into humus, characterized in that a composite material system is formed from the biodegradable polymers and materials that release nutrient nitrogen or nutrients nitrogen and phosphorus, in which the mass ratio of carbon to nitrogen in the composite material system is (1-35):1,

• the biodegradable polymers are polyvinyl alcohol;
• wherein the method is for promoting the conversion of biodegradable polymers into compost humus;
• the composite material system is added into raw composting materials to obtain a mixture, wherein a mass ratio of carbon in the composite material system to a mass of raw composting materials is 1:(60-10900);
• and the raw composting materials consist of a cow dung and a corn straw in a mass ratio of 1:4;
• wherein the mixture formed by the composite material system and the raw composting materials is incubated at a humidity of 40% and a temperature of 58° C. in the dark for 30-120 days.