1. combination of planting and breeding
this is the main way of livestock manure treatment in China at present. Farms use dry cleaning or bubble dung to collect manure. In the case of dry manure cleaning, solid manure is treated by composting or other harmless ways, and sewage and some solid manure are treated by anaerobic fermentation and oxidation pond. On the basis of nutrient management, organic fertilizer, biogas residue, biogas slurry or fertilizer water are applied to field crops, vegetables, fruit trees, tea gardens and trees. In the case of bubble manure, the manure is treated by anaerobic fermentation and oxidation pond, and then returned to the field for agricultural production.
2. Recycling
is widely used in dairy farms and duck farms. Farms mainly adopt the method of dry cleaning manure, which is to reduce the water consumption in the process of breeding by controlling the production water, and to implement sewage back channel transportation, rain and sewage diversion and solid-liquid separation in the field to reduce the pressure of sewage treatment. The treated sewage can be used to wash manure ditches and fences in the field. Solid manure can be treated and utilized by composting, substrate production, cattle mattress materials, fuel and other means.
3. Up-to-standard discharge
At present, the proportion of this treatment method is relatively small. One of the reasons is that the cost of manure treatment equipment is high, which causes great pressure on farms; Second, feces itself is a reusable resource. To meet the discharge standards, it is required that the effluent quality reaches the national discharge standard after the sewage is treated by anaerobic and aerobic processes, and the solid manure is treated by composting and then reused.
4. Centralized treatment
In intensive farming areas, relying on large-scale farms or special manure treatment centers, the manure or sewage from surrounding farms (residential areas and large-scale farmers) are collected and treated centrally.
ii. resource utilization of livestock and poultry manure
compared with various schemes for resource utilization and disposal of livestock and poultry manure, we adopt modular unit design that can be combined, which can not only dispose of solid manure in large-scale farms on the spot, but also dispose of solid manure in large-scale centralized treatment stations, and the output is organic fertilizer raw materials. The liquid manure adopts a three-stage precipitation aerobic fermentation tank, and the output is liquid organic fertilizer.
1. Solid manure
At present, farms basically adopt the methods of returning to the field and composting. However, there are some problems, such as large floor space, long treatment cycle, incomplete harmlessness and easy to produce secondary pollution. SJC aerobic fermentation process system includes automatic mixing bin, fermentation box and deodorization unit. The mixing bin effectively regulates and mixes the solid manure, auxiliary materials and flora to a closed fermentation box, and the fermentation box outputs products rich in organic matter through the linkage of internal units. The generated organic products are clean and stable, and can be directly applied or stored as organic fertilizer raw materials with confidence. The deodorizing unit recovers waste gas, which ensures the harmlessness of the disposal process.
Process characteristics:
Practice has proved that this process is the best disposal scheme for solid manure. The only way to ensure that there is no odor, there is a treatment process, and there is no landfill leachate. The project is equipped, and the material automatic tipping bucket design is adopted, with small land area, high treatment efficiency, large monomer treatment capacity and low maintenance and operation cost.
the unit is modular and can be used alone or in combination to meet the disposal requirements of different scales. Compared with the common stirring type, such as drum type, tank type, silo type, etc., the monomer processing capacity is large and the maintenance and operation cost is low. Compare with various composting process of that same scale, the occupied area is reduced by 5-75%, and the proces is suitable for on-site disposal of large-scale farms and large-scale centralized disposal.
2. The liquid manure
adopts a three-stage circulating aerobic fermentation sedimentation tank, and adopts the scheme of stirring+aeration+flora, which can be processed into odorless liquid biological bacterial fertilizer rich in beneficial microorganisms in 7-15 days, with low facility cost, simple operation and rapid resource utilization.