According to measurements, a duck produces an average of 100 grams of fresh manure per day, and every 10000 ducks produces 1 ton of manure per day. Based on a 50 day breeding cycle for meat ducks, 50 tons are required to be produced. A duck farm with an annual market volume of 1 million ducks produces 5000 tons of manure annually. These continuously discharged feces are issues that must be explored in the development of modern poultry and livestock farms.
Treating duck manure from duck farms into organic fertilizer is an activity that is both environmentally friendly and economically beneficial. Specifically, converting duck manure into organic fertilizer can be achieved through fermentation, which not only reduces environmental pollution but also produces fertilizers beneficial to crops.
The specific steps for treating duck manure into organic fertilizer include preliminary preparation, mixing and fermentation, composting treatment, and mature use. The equipment involved in this process mainly includes solid-liquid separators, turntables, and fermentation agents.
preparation in advance
Collecting duck manure: Duck manure can be manually or mechanically removed from the duck coop and collected in a dedicated collection area. Large duck farms typically use automated equipment to improve efficiency.
Deodorization and deodorization: In order to reduce the pollution of fishy odors to the environment, a powerful deodorizing and pollution reducing agent can be used to spray duck manure, which helps to reduce the odor in the subsequent treatment process.
Mixing and Fermentation
Mixing and stacking: Mix the collected duck manure with substances such as rice bran and corn bran, and add agricultural duck manure organic fertilizer and biological fermentation agent for mixing to ensure uniformity of the mixture. This process requires the use of mixing equipment, such as mixers or mixer trucks.
Adjust moisture and carbon nitrogen ratio: The moisture content of duck manure should be maintained at 60-65%, which can be determined through a hand grip test. At the same time, adjusting the carbon nitrogen ratio to 25-30:1 to ensure good fermentation conditions can be achieved by adding straw, rice straw, etc.
Frequent flipping and ventilation: As fermentation is an oxygen consuming process, it is necessary to regularly use a flipping machine to flip the duck manure pile to maintain ventilation, promote oxygen supply, and accelerate the fermentation process.
Composting treatment
High temperature fermentation: The built duck manure pile will heat up to above 65 ℃ within 2-3 days, and the first turning of the pile is required at this time. During the entire fermentation cycle, it may take 2-3 high-temperature flips like this to fully complete the fermentation.
Equipment requirements: High temperature resistant flipping machinery is required at this stage, as flipping operations are carried out under high temperature conditions, which have certain requirements for the heat resistance of the equipment.
Mature use
Maturity testing: After about a week of fermentation, the temperature of duck manure gradually decreases, the material becomes soft, and the color changes to dark brown. At this point, it can be considered that the fermentation is complete and mature into organic fertilizer.
Subsequent processing: Mature organic fertilizers can be classified by particle size using a screening machine, and then packaged or directly applied.
In summary, treating duck manure into organic fertilizer not only solves the environmental problems of duck farms, but also produces valuable agricultural fertilizers. By adopting scientific processing methods and appropriate equipment, duck farms can achieve resource recycling, improve economic and environmental benefits.
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