In order to make feces into high-quality organic fertilizer, the fermentation process is essential. Fermentation refers to the process in which microorganisms convert organic matter in feces into nutrients that can be absorbed by plants under suitable temperature and environment.

1. Principle of fermentation: The main processes of feces fermentation include aerobic fermentation and anaerobic fermentation. In aerobic fermentation, oxygen is essential. Microorganisms release carbon dioxide and water by decomposing chemicals in the organic world and convert organic matter into nutrient-rich decomposed substances.

2. Fermentation conditions: To promote effective fermentation, it is first necessary to control the appropriate temperature. Generally, the temperature between 55℃ and 65℃ is the most ideal. This temperature can effectively kill pathogens and parasite eggs in feces. In addition, humidity is also a key factor affecting fermentation, and humidity should be maintained between 50%-60%.

3. Fermentation time: The fermentation time of feces generally ranges from a few weeks to a few months, depending on environmental conditions and the type of feces. In this process, regularly turning and checking the temperature and humidity of the manure pile can help accelerate the fermentation process.