The technology of manure piled up to
produce organic fertilizer is to regulate the carbon-nitrogen ratio in livestock manure and artificially control the conditions of water, temperature, PH and other conditions, and use the fermentation of microorganisms to treat livestock manure and produce organic fertilizer.
During the stacking process, the organic matter is transformed from an unstable state to a stable humus substance along with the process of decomposition of organic matter and formation of humus. Due to the decomposition and conversion of volatile components such as carbon, the bulk material has undergone significant changes in volume and weight, and the weight and volume are reduced by about 1/2.
First, the main equipment.
Livestock and poultry manure storage and fertilizer production processes require a large number of general and non-standard equipment.
1. Pre-treatment equipment: There are mainly floor scales, stockyards, unloading stations, feeding doors, storage ponds or loading machinery, transportation machinery, etc. 2. composting equipment: mainly there are
turning machine, fermentation tank, multi-stage shaft furnace type fermentation tower, barrel type fermentation tank, spiral stirring type fermentation tank and so on. 3.
granulation equipment: mainly
rotary drum granulator,
disc granulator, extrusion granulator, compression granulator and so on. 4. Screening and
packaging equipment: mainly fixed screen, cylindrical sieve, vibrating screen, etc.
Second, the main technical parameters.
1 .Carbon to nitrogen ratio: The carbon and nitrogen balance of the compost mixture is a key factor in achieving better biological activity of the microorganisms. The carbon to nitrogen ratio of the compost mixture should be maintained at 25-35:1. 2. Humidity: Aerobic compost should generally be kept at 40-70%. 3. PH: The pH varies with the type of compost mixture and the stage of composting. Under normal circumstances, no adjustment is needed. If adjustment is required, it can be adjusted by adding alkaline or acidic substances to the mixture before the start of compost degradation. 4. Other design parameters: rectangular fermentation reactors need to be turned over regularly to keep the temperature below 75 °C, and the frequency of stacking is 2-10 days/time. The width and depth of the rectangular strip are limited only by the turning equipment. The strip is generally 1.2-1.8 meters deep and 1.8-3 meters wide. The height of the pile is usually 2.5-4.5 meters and the width is usually 2 times the depth.
