Organic Fertilizer Microbiological Process
The microbiological process of aerobic fermentation can be roughly divided into three stages, each with its own unique microbiota:
- Heat stage(medium stage,heating up stage)
In the early stage of fermentation (usually within 1-3 days), thermophilic microorganisms in the compost heap utilize soluble and easily degradable organic matter as a source of nutrition and energy, rapidly proliferate, and release heat energy, making the temperature of the compost heap continuously rise.Within the scope of this phase at room temperature to 45 ℃, microorganism is given priority to with medium temperature, aerobic type.
- High temperature phase
When the composting temperature rises to more than 45 ℃, the stage in high temperature.
Usually begin from stacking fermentation, only 2-3 days the composting temperature can rise quickly to 55 ℃, 1 weeks heap temperature can reach the highest (most high temperature can reach 80 ℃).
Through high temperature can effectively kill pathogens in organic waste, according to the national standards of high temperature fermentation health (GB7959-87), for fermentation, the highest temperature more than 50 to 55 ℃ for 5 to 7 days.
- Rotten phase
At the end of the high temperature stage, only part of the organic matter that is difficult to decompose and the newly formed humus are left. At this time, thermophilic microorganisms are dominant again, and the remaining organic matter that is difficult to decompose is further decomposed. The humus increases continuously and tends to be stabilized, and the fermentation enters the maturity stage.