Fermentation compost fertilizer manufacturing process
In the fertilizer manufacturing process, the fermentation method is divided into high temperature compost and common compost according to different raw materials. High temperature compost uses plants with high fiber content as the main raw material, and generates a lot of heat through composting fermentation under the condition of aeration. The temperature of compost is very high (50-60 ℃). Therefore, it matures quickly, composts quickly and has high nutritional content.
In the process of high temperature fermentation, pathogens, eggs and weeds can be killed. Common compost is usually mixed with more soil, with low fermentation temperature, slow decomposition process and long composting time. During composting, the chemical composition of nutrient differentiation changed, the ratio of carbon to nitrogen decreased, the mineral nutrients directly absorbed by plants increased, and humus formed. During the high-temperature composting, the materials must be stirred by the windrow turner equipment to ventilate the compost.
Fermentation period of organic fertilizer
Most organic fertilizer products are only composted and fermented for 15-20 days, and such products can only reach the harmless standard. The fermentation process of high quality organic compost usually takes 45-60 days. This is because in the early heating and high temperature stage of composting, harmful microorganisms such as plant pathogenic bacteria, insect eggs, weed seeds will be killed, but the main role of microorganisms in this process is metabolism and reproduction, and only a small amount of metabolites are produced, and these metabolites are unstable. Easily absorbed by plants.
In the later stage of fermentation, microorganisms decompose the organic matter and produce a large number of metabolites which are beneficial to plant growth and absorption. The whole fermentation process takes 45-60 days. Through this process, composting can achieve three goals: harmless, humic, and a large number of microbial metabolites, such as antibiotics, proteins and so on. The high-quality compost is processed into special commercial organic fertilizer by fertilizer granulator machine.