Introduction about Aerobic Fermentation

Aerobic fermentation has some limitations, such as, the moisture content should be 45%-60%, the environment temperature should be above 15℃, and the ratio of carbon to nitrogen is 25/1 to 35/1, so the following steps must be mastered no matter which method is adopted.

1. Humidity control. In the process of composting, the moisture content of the materials is 50%-60%, which is most conducive to microbial decomposition. The moisture content of livestock and poultry manure is generally in 75%-80%, so generally the straw with lower moisture content is used for regulation.
2. Control fermentation temperature. One of the important conditions for normal fermentation of materials is the appropriate temperature. In cold climates, heating or heat preservation measures should be taken to ensure normal fermentation. Fermentation facilities should be closed in winter and have good performance in heat preservation; at the same time, ventilation should be convenient to provide oxygen needed for fermentation.
3. Adjust the carbon-nitrogen ratio. The C/N of livestock and poultry manure is less than 20:1, but the C/N of straw is higher than 50:1, so adding some straw to livestock and poultry manure can adjust the C/N of materials to 25-35:1.
4. Turning compost. Aeration is an important factor on affecting composting temperature and fermentation performance. The purpose of turning is to improve the ventilation in the materials, dissipate moisture, and promote the proliferation of high-temperature beneficial microorganisms.
5. Screening. In order to improve the commodity value of organic fertilizer and facilitate packaging and storage, generally the screening is adopted to separate bulk materials.