Recycling method of waste corn stalks

Abstract

The invention discloses a recycling method of waste corn stalks. The method comprises the following steps: crushing and screening the waste corn stalks to remove dusts and impurities, adding a sulfuric acid solution with the concentration of 0.5-1 mol / L, kneading the waste corn stalks and the sulfuric acid solution for at least 30 min, keeping the temperature at 40-50 DEG C in the kneading process, and standing the obtained mixture at the room temperature for at least one day to obtain pretreated waste corn stalks; feeding the pretreated waste corn stalks into a steam explosion tank, introducing steam at a speed of 20-40 mL / min to adjust the pressure in the steam explosion tank to 3.2-3.8 Mpa, maintaining the pressure for 20-40 min, instantaneously opening a tank bottom valve, and discharging the obtained material to obtain exploded stalks; and adjusting the exploded stalks to be neutral, inoculating with a composite microbial agent, and carrying out composting fermentation, drying andgranulation to obtain a granular biological fertilizer.

Description

technical field [0001] The invention relates to the technical field of straw recycling, in particular to a method for recycling waste corn straw. Background technique [0002] my country is a large agricultural country, and the development of agricultural production is inseparable from fertilizers. With people's pursuit of high-yield planting, my country's demand for fertilizers is increasing day by day. As we all know, the fertilizers used in agricultural production in my country are mainly chemical fertilizers. Chemical fertilizers have the advantages of easy scale production, convenient transportation and application, and high crop yields. However, soil compaction and soil fertility decline caused by unreasonable use of chemical fertilizers for a long time , ecological destruction, environmental pollution and the decline in the quality of agricultural and sideline products have been highly valued by relevant state departments and agricultural science and technology circles...

AI Technical Summary

Problems solved by technology

However, due to the environmental pollution and waste of resources caused by incineration or disposal of straw on the spot, it has become the focus of attention of relevant management departments and scientific researchers, and the corresponding treatment technology lags behind. The contradictions between the two groups have brought a series of environmental problems. and social problems, such as air pollution, fire, water eutrophication, etc.

[0004] At present, the ways to deal with straw in rural areas are mostly extensive burning, feed and returning to the field. The straw returning to the field is an important part of traditional agricultural production. And ecological effects, etc., but to a certain extent, after the straw enters the soil, there are still organic acid accumulation, slow decomposition, and adverse effects on farming and agronomic operations.