The raw materials of organic fertilizer are livestock manure and crop stalks, and livestock manure also contains a variety of animal manures, so we will take pig manure as an example to tell you. The process of granulating livestock and poultry manure through the strand-turning granulator is called drum granulation
. Generally speaking, the fermentation process of organic fertilizer is divided into four stages, namely: heating stage, high temperature stage, cooling stage, decomposed and fertilizer preservation stage, etc.
The specific contents are as follows:
1) fever stage
How to ferment pig manure into organic fertilizer. In the initial stage of composting, RW pig manure starter strains began to work. The microorganisms in pig manure compost are mainly medium temperature and aerobic species, and the most common are non-spore bacteria, spore bacteria and molds. They start the composting fermentation process, decompose easily decomposable organic substances (such as simple sugars, starch, protein, etc.) under aerobic conditions, generate a lot of heat, and continuously increase the composting temperature from about 20°C to 40°C. It is the fever stage, or the middle temperature stage, and the time is 6-24 hours after the addition of the bacteria.
2) High temperature stage
With the increase of the temperature in pig manure composting, the thermophilic microorganisms in the RW pig manure starter strain gradually replaced the mesophilic species and played a leading role. The temperature continued to rise, generally reaching above 50°C within a few days , Into the high temperature stage. In the high temperature stage, thermoactinomycetes and thermogenic fungi become the main species. They strongly decompose the complex organic substances (such as cellulose, hemicellulose, pectin substances, etc.) in the compost, and accumulate heat. The compost temperature rises to 60-70°C, even as high as 80°C, and most of them are hot immediately. Microorganisms also die in large numbers or enter a dormant state (above 20 days), which plays an important role in accelerating the maturity of compost. In general, in order to speed up the decomposing cycle, we generally choose composting equipment such as trough type turning machines and crawler turning machines for assistance.
3) Cooling stage
How pig manure is fermented into organic fertilizer. When the high temperature phase of pig manure composting lasts for a certain period of time (usually about 48 hours), most of the cellulose, hemicellulose, and pectin substances have been decomposed, leaving complex components that are difficult to decompose ( Such as lignin) and newly formed humus, the activity of microorganisms is weakened, and the temperature gradually drops. When the temperature drops below 40°C, mesophilic microorganisms become the dominant species again. If the cooling stage comes early, it indicates that the composting conditions are not ideal and the plant material is not fully decomposed. At this time, you can turn the pile (the amount of fermentation raw material is small, you can manually turn the pile, if the amount of fermentation raw material is large, you can use the pile turning machine to turn the pile), mix the stacked materials well, and make it generate a second heat and temperature. To promote the maturity of compost.
4) The stage of composting and maintaining fertilizer
After the first three stages of fermentation for about 7-10 days, after the pig manure compost is decomposed, the volume shrinks and the pile temperature drops to slightly higher than the temperature. At this time, the compost should be compacted to cause an anaerobic state and weaken the mineralization of organic matter. In order to maintain fertilizer.