For the production of organic fertilizer from pig manure, it is recommended to adopt aerobic fermentation treatment, which can be fermented with fermentation agent, so as to better the crops, and mix pig manure with straw, sawdust, mushroom residue, etc. in an appropriate proportion (80-90% of manure, 10-20% of others). 1 ton of material (about 2.5 tons of fresh material) is added with 1 kg of fertilizer fermenting agent, diluted with 1 kg of fertilizer fermenting agent and 5 kg of rice bran (or bran, corn flour and other substitutes), and then evenly distributed into the material pile. In the fermentation process, the compost windrow turner should be used to properly supply oxygen and turn over the pile, and the temperature should be controlled at 55-65 ℃. The water content of fermentation materials should be controlled at 60-65%.
The method of adjusting material water content: the water content of fermented pig manure and chicken manure should be controlled at 40-65%. Moisture judgment: hold a handful of pig manure tightly, see the watermark but do not drop water at the finger joint, and it is appropriate to disperse when landing. Water less fermentation slow, water more poor ventilation, therefore, we must grasp the water content. If the water content is too high, straw, sawdust, mushroom residue and dry soil powder can be added. Judge whether the moisture is suitable or not: hold a handful of materials tightly, see the watermark at the finger joint but do not drop water, and it will be scattered when landing. In general, the whole fermentation process can complete the complete deodorization, fermentation, decomposition, insecticidal sterilization and so on in 5-7 days.
Start up temperature of organic manure production line. The start-up temperature should be above 15 ℃ (it can be operated in four seasons, not affected by the season, and it is better to ferment indoors or in the greenhouse in winter), and the fermentation temperature should be controlled below 70-75 ℃.
Mix well and ventilate. The production of organic fertilizer by pig manure fermentation needs good (consumption) oxygen fermentation. Therefore, the oxygen supply measures should be increased in the fertilizer production process, and it is appropriate to mix well, turn frequently and ventilate. Otherwise, it will cause anaerobic fermentation and produce odor, which will affect the effect of fertilizer.
Fermentation complete. Generally, 48 hours after the pig manure is piled up, the temperature rises to 50-60 ℃, and the third day can reach above 65 ℃. Under this high temperature, the temperature can be turned over once. Generally, there will be two times of high temperature above 65 ℃ in the fermentation process. Turning over twice can not only complete the fermentation, but also complete the fermentation within a normal week. The material was dark brown, and the temperature began to drop to normal temperature, indicating that the fermentation was completed.