Fermentation treatment
Pig manure production of organic fertilizer, it is recommended to use aerobic fermentation treatment, you can use fermentation agent fermentation, this is better for crops. Pig manure was mixed with straw, sawdust and mushroom residue in proper proportion (feces accounted for 80-90%, others accounted for 10-20%). 1 ton of material (about 2.5 tons of fresh material) is added with 1kg fertilizer starter, diluted with 5kg rice bran (or wheat bran, corn flour and other substitutes) for 1kg fertilizer starter, and then evenly sprinkled into the material pile. During the fermentation process, oxygen should be supplied properly and the temperature should be controlled at 55-65 ℃. The moisture content of fermentation materials should be controlled at 60-65%.
The fermentation dynamic temperature should be above 15 ℃ (it can be operated in four seasons, not affected by seasons, and should be fermented indoors or in greenhouse as far as possible in winter), and the fermentation temperature should be controlled below 70-75 ℃.
Mix well and ventilate. Fermentation of pig manure to produce organic fertilizer requires good oxygen-consuming fermentation, and the equipments required for biofertilizer production, and compost turner is used to process the fermented product. Therefore, it is necessary to increase the oxygen supply measures during the operation, and it is advisable to mix well, turn frequently, and ventilate. Otherwise, it will cause anaerobic fermentation to produce odor and affect the fertilizer effect.
The fermentation was completed. Generally, after 48 hours of pig manure accumulation, the temperature rises to 50-60 ℃, and on the third day, it can reach above 65 ℃. Under this high temperature, it can be turned over once by compost tipper. In general, the fermentation process will appear two times of high temperature above 65 ℃. The fermentation can be completed after two times of overturning, and the fermentation can be completed in a normal week. The material was dark brown, and the temperature began to drop to normal temperature, indicating that the fermentation was completed. Then use rotary drum granulator for further processing.
