In the implementation of projects utilizing livestock manure and crop straw, a production line with an annual capacity of 50,000 tons represents a medium-scale operation; it is a preferred choice for many processing plants due to its balance of investment costs, production efficiency, and market suitability. The complete production line can be configured for either powdered or granular organic fertilizer, with equipment selection varying significantly based on raw material types, site conditions, environmental regulations, and the target market for the finished product.
The raw material pretreatment system is the first stage of the production line. Livestock manure typically has a high moisture content—often reaching 70%–80% for fresh manure—requiring the use of a dewatering machine to reduce moisture levels to the 55%–60% range, thereby creating suitable conditions for subsequent fermentation. Bulking agents such as straw and rice husks are processed using chain crushers, followed by a double shaft paddle mixer to blend the manure with these agents; the carbon-to-nitrogen (C/N) ratio is adjusted to an optimal range of 25–30:1 to ensure successful aerobic fermentation. Belt conveyors are used throughout the pretreatment stage to transport materials, minimizing manual labor and reducing dust emissions.
The fermentation system determines the quality of the decomposed organic fertilizer. For a 50,000-ton annual capacity, the mainstream choice involves using trough-type compost turners and multiple fermentation troughs, with a fermentation cycle of 12–15 days; this approach requires moderate civil engineering investment, offers simple operation and maintenance, and is ideal for sites with ample space. In areas with strict environmental regulations, enclosed fermentation tanks may be used instead; these shorten the decomposition cycle to 7–10 days and allow for the contained collection and treatment of odors, though equipment investment costs are higher. Some projects also incorporate biological deodorization units to treat exhaust gases generated during fermentation and ensure compliance with environmental impact assessment standards.
The post-processing section offers two process routes: powdered and granular. The powdered organic fertilizer process is streamlined: fermented and decomposed material is fed into a half-wet material crusher and then graded by a drum screening machine; material meeting specifications is conveyed directly to automatic packaging equipment for filling and sealing before shipment, resulting in lower overall investment and maintenance costs. The production process for granular organic fertilizer is more comprehensive; a granulation step is added following crushing and screening, allowing for the selection of either a new-type organic fertilizer granulator or a disc granulator based on specific requirements. The new type organic fertilizer granulator offers distinct advantages: it is highly adaptable to fermented, decomposed materials without requiring strict raw material drying, operates with low energy consumption, maximizes the retention of beneficial live bacteria, and produces granules with high strength and a low recycle ratio. Meanwhile, the disc granulator features mature technology and easy setup, producing round, aesthetically pleasing granules that are well-received in the market. Following granulation, the process integrates rotary dryers and coolers to reduce moisture content to below 15%, thereby enhancing granule strength and minimizing caking during storage; finally, the product is screened to separate out material for recycling, while the qualified granules are fed into an automatic quantitative packaging machine for final output.
The complete organic fertilizer production line also requires auxiliary facilities, such as a PLC centralized control system that enables one-touch formula switching and coordinated equipment start-stop operations, as well as dust removal equipment to improve the workshop environment. Project planning should not focus solely on the equipment list; instead, it requires a comprehensive assessment of raw material sources, facility footprint, environmental regulations, and target markets before finalizing the configuration to ensure equipment selection aligns with actual operating conditions.
Huaqiang Heavy Industry offers one-stop services for organic fertilizer production lines with an annual capacity of 50,000 tons, providing complete solutions—ranging from process planning, equipment customization, and on-site installation and commissioning to ongoing technical guidance—to ensure the successful implementation of organic fertilizer projects.
_800x600.jpg)