Pretreatment is needed before pig manure is fermented by fertilizer production machine. When the water content of pig manure is high, non-toxic and harmless wood chips or coarse rice bran and other accessories can be added to the fresh pig manure, or chicken manure can be added to adjust the water content, ventilation and C / N ratio, so that the water content of pig manure is controlled at about 60% and the C / N ratio is between 30 and 40; or the water content suitable for fermentation can be directly dehydrated by pig manure dehydrator, Complete the preparation of fermentation process.

Generally, the main environmental factors affecting fermentation include temperature, moisture, C / N ratio and pH. In the industrial fermentation, the suitable living environment for aerobic microbial fermentation is improved by human control, so as to promote the rapid propagation of bacteria, so as to promote the rapid fermentation. The following temperature and humidity as an example for a brief introduction. Effect of humidity and temperature on fermentation of organic fertilizer production

Water is an indispensable factor for microbial activities. In the production of organic fertilizer, the suitable moisture content of material is 60% - 70%. If the water content of the material is too high or too low, the activity of aerobic microorganism will be affected, and water regulation should be carried out before fermentation. When the moisture content of the material is less than 60%, the temperature rises slowly and the decomposition degree is poor; when the moisture content is more than 70%, the aeration is affected and anaerobic fermentation is formed, the temperature rises slowly and the decomposition degree is poor. The water content of fresh manure is generally high, and the way to reduce the water content is to mix organic materials with low water content. Such as chaff, peat, sawdust, straw and other mixed absorption, the other is the use of solid-liquid separation equipment for dehydration.

Temperature is an important indicator of microbial activity in aerobic fermentation of fertilizer production line. The production of high temperature indicates that the fermentation process is running well. Industrial fermentation requires a short period of 10-20 days. The organic fertilizer compost turning machine is usually used to improve the oxygen supply state by turning materials and forced ventilation, so as to promote the rapid warming of materials in the early stage and maintain the high temperature of 60 ~ 65 ℃ in the middle stage. The bad physical shape of pig manure is the main obstacle to the temperature rise of fermentation, which must be improved by adding organic matter with high C / N and low water content.