The use of organic fertilizer equipment to process biogas residue and produce organic fertilizers is an effective resource recovery method. It not only solves the problem of treating biogas residue in biogas engineering, but also produces high-quality fertilizers rich in organic matter and nutrients, promoting soil health and crop growth. The following is a detailed introduction to the process of using organic fertilizer equipment to treat biogas residue and produce organic fertilizer:
1. Preliminary treatment of sludge
Dehydration solid-liquid separation: Firstly, it is necessary to dehydrate the sludge, usually by mechanical pressure filtration or centrifugal separation, to reduce the moisture in the sludge to a certain level for subsequent processing.
Solid waste screening: Screen out large particles or non organic impurities from the sludge to ensure smooth subsequent processes.
2. Raw material preparation
Adjust C/N ratio: As needed, the sludge can be mixed with other carbon rich materials (such as sawdust, straw, corn stover, etc.) to adjust the C/N ratio of the mixture to between 25:1 and 30:1, which is the most favorable ratio for microbial activity.
Moisture adjustment: Keep the moisture content of the raw materials between 50% -60%. Too much or too little is not conducive to fermentation.
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3. Composting fermentation
Inoculate fermentation starter culture: Add an appropriate amount of fermentation starter culture to the mixture, as these beneficial microorganisms can accelerate the decomposition of organic matter.
Composting management: Stacking raw materials into strip-shaped piles or placing them in fermentation bins, maintaining appropriate height and width for air circulation. During the fermentation process, it is necessary to regularly flip the compost to ensure sufficient oxygen and temperature balance, promote the activity of aerobic microorganisms, and monitor the compost temperature, ideally maintained between 55 ° C and 65 ° C.
4. Maturity and post-processing
Maturity: When the compost stops heating up, the color turns dark brown, and the odor disappears, it indicates that the fermentation is basically completed and enters the maturation stage, which may take several weeks to months.
Screening and crushing: passing mature compost through an organic fertilizer screening machine to remove undecomposed hard objects; Next, if necessary, the particles can be further refined through a crusher for subsequent granulation.
5. Granulation and drying
Granulation: Use an organic fertilizer granulator to make the crushed organic fertilizer raw materials into uniform particles for easy storage and use.
Drying: Granular fertilizers need to undergo drying treatment to remove excess moisture, extend shelf life, and prevent mold growth.
6. Packaging and Storage
Packaging: Measure and package the dried and qualified organic fertilizer particles for easy transportation and sales.
Storage: Store in a cool and dry place, away from direct sunlight and rainwater to maintain the quality and effectiveness of the fertilizer.
Through the above steps, the use of organic fertilizer equipment to treat sludge can effectively convert waste into valuable resources, not only achieving ecological cycling, but also contributing to sustainable agricultural development.