Pig manure can be processed into organic fertilizer, so how to ferment pig manure into organic fertilizer? The aerobic organic fertilizer fermentation tank for fermenting pig manure into organic fertilizer. Pig manure generally has a relatively high moisture content. Before fermentation in a fermentation tank, a dry and wet separator is used for separation. The sewage is treated, and the manure is fermented in a tower-type vertical organic fertilizer fermentation tank for aerobic fermentation. The process of aerobic fermentation of pig manure for organic fertilizer processing can be divided into the following steps, combining dry and wet separators with organic fertilizer fermentation tanks to achieve efficient treatment: 1. Dry and wet separation pre-treatment Using a dry-wet separator to separate pig manure solid and liquid, the water content of the separated solid manure needs to be reduced to below 45%, and the liquid manure needs to be treated by a sewage treatment system (such as an oxidation pond or biogas project) before being discharged or reused. 2. Operation points of organic fertilizer fermentation tank - Material ratio: According to pig manure: Straw = 2:1 mix, adjust the carbon-nitrogen ratio to 25-35:1, and water content Control between 50%-65% (no dripping when pinched). -Strain activation: Add 200g of fermenting agent (such as BACILLUS, yeast complex) per ton of pig manure, and use after 24 hours of activation with brown sugar and warm water. - Tank operation: - The initial fermentation requires the introduction of bacterial strains, and subsequent continuous fermentation can be carried out using microorganisms in the tank. - Maintain material flipping and oxygen supply by hydraulic agitation and high pressure air supply system, maintaining temperature of 55-65 °C for 7-10 days. - After fermentation, the material is yellow-brown, loose and odorless, and can be directly discharged or packaged for sale. 3. Key Control parameters - Warm