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Sludge Composting as Organic Fertilizer
If sludge can be turned into a renewable resource, it not only helps manage the waste problem but also prevents secondary pollution caused by improper handling of sludge containing heavy metals, pathogens, and toxic organic compounds. Common methods for sludge treatment include landfilling, composting, incineration, and energy generation. Landfilling involves burying non-recyclable materials, allowing nature to break them down over time through natural physical and chemical processes. Composting, on the other hand, utilizes the organic content in sludge to create nutrient-rich fertilizer. In some cases, sludge is used for pyrolysis or anaerobic digestion to generate heat or biogas. Among all these options, composting is often the most cost-effective and environmentally friendly method.
Using a starter like "Goldfish Fertilizer" makes the process simple and efficient. All you need is a basic setup, and you can complete a batch in just a few days. The process begins by mixing the sludge with organic materials such as crushed straw, sawdust, or other carbon-rich substances. Then, a small amount of the starter culture is added, and everything is thoroughly mixed. Within 7 to 10 days, the sludge undergoes full fermentation and becomes safe for use or sale.
This method not only reduces odor and moisture but also effectively kills harmful bacteria and parasites, turning the sludge into a valuable compost product. After composting, the material is dried, ground, and blended with appropriate amounts of chemical fertilizers and beneficial microorganisms to produce organic compound fertilizers or bio-organic fertilizers. This approach ensures that urban sludge is not just disposed of, but transformed into a useful resource that supports sustainable agriculture and environmental protection.
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