Trough fermentation of organic fertilizer production line
Trough fermentation is composed of single or multiple fermentation troughs. The volume of a single fermentation trough is designed according to the span and fermentation cycle of the flipper. The width of the fermentation trough is 4 meters, the height is 1.8 meters, and the length is 48-60 meters.
The fermentation trough is of reinforced concrete structure, and the adjacent two fermentation troughs share the same pool wall. The trough wall is required to bear the pressure of the tipper. The bottom of the fermentation trough must bear the gravity of fermentation materials, the gravity of the loader and the ventilation requirements.
Aerobic composting fermentation of organic fertilizer production line
1. Pre mixing. The chicken (pig) manure and filling materials are forced to be mixed evenly in the mixer according to the proportion
2. Heating stage. The temperature of the compost gradually increased from the ambient temperature to about 45 ℃. The dominant microorganisms were thermophilic microorganisms, including fungi, bacteria and actinomycetes. The decomposition substrate was mainly composed of sugars and starch.
3. High temperature stage. In the fermentation process of fertilizer production line
, when the temperature of compost rises above 45 ℃, the thermophilic microorganism is inhibited or even died, while the thermophilic microorganism rises to be the dominant microorganism. The residual and newly formed soluble organic matter in compost continues to be oxidized and decomposed, and complex organic matters such as hemicellulose, cellulose and protein also begin to be strongly decomposed. The activities of microorganisms also occur alternately. Generally, thermophilic fungi and actinomycetes are the most active when the temperature is about 50 ℃. When the temperature rises to 60 ℃, the activities of fungi almost completely stop, and only thermophilic bacteria and actinomycetes are active. When the temperature rises to 70 ℃, most thermophilic microorganisms no longer adapt and enter into the stage of death and dormancy.
4. Cooling stage. In the high temperature stage, the death and activity of microorganisms were reduced, and the low temperature stage was gradually entered. At this stage, the thermophilic microorganisms began to occupy the dominant position and further decompose the residual organic matter which was difficult to decompose. However, the microbial activity generally decreased, the heat output of the heap decreased, the temperature began to drop, the organic matter tended to stabilize, the oxygen demand was greatly reduced, and the compost entered the maturity stage.
5. Aging stage. The fermented chicken (pig) manure has not yet been completely decomposed, so it needs to continue to be aged. The purpose of aging is to further decompose and stabilize the residual organic matter in chicken (pig) manure. At the later stage of aging, the compost temperature gradually drops to about 40 ℃, and the moisture content can be reduced to 20% ~ 30%. Humus is formed after composting.