Chicken manure is rich in organic matter and is a high-quality raw material for organic fertilizer. However, it easily produces foul odors and breeds bacteria, and improper handling can cause environmental pollution. An efficient organic fertilizer equipment for chicken manure deodorization and composting needs to achieve “deodorization throughout the entire process and efficient composting and maturation.”
Simultaneous deodorization and pollution reduction during the pretreatment stage is fundamental. First, screening is used to remove bedding impurities and stones from the chicken manure, reducing the load on subsequent processing; then, a physical + biological synergistic deodorization method is adopted: a spraying device is used to dilute soluble odorous substances, combined with a biofilter to adsorb and decompose ammonia, hydrogen sulfide, and other odorous gases, reducing odor diffusion at the source. At the same time, the moisture content of the chicken manure is controlled at 55%-60%, laying the foundation for subsequent composting, maturation, and deodorization.
The composting process achieves synergistic deodorization and maturation. Auxiliary materials such as straw and mushroom residue are added according to a carbon-to-nitrogen ratio of 25:1-30:1. A double screws compost turning machine or a large wheel compost turning machine is used for regular deep turning, which ensures ventilation and oxygen supply to the compost pile, inhibits anaerobic fermentation and the production of foul odors, and accelerates the decomposition of organic matter. Special deodorizing and composting microbial agents can be added to decompose odorous components and shorten the composting cycle, ensuring the inactivation of bacteria and insect eggs.
After composting is completed, ventilation and drying are used to further dissipate residual odors, and the nutrient and pollutant indicators of the organic fertilizer are tested to ensure compliance. The leachate generated during the composting process is collected and treated, then recycled for spraying and deodorization, achieving wastewater recycling.