Choosing the right fertilizer production line requires a comprehensive consideration of your own needs, technological compatibility, environmental requirements, and return on investment to avoid blind investment. Here are specific suggestions from four core dimensions:

First, clarifying production needs is fundamental. The direction should be determined based on the target market and raw material supply: If focusing on greenhouse vegetables and other facility agriculture, and using local livestock manure and straw as raw materials, an organic fertilizer production line with a water-soluble fertilizer module is preferable to meet flexible fertilization needs; if serving field crops such as corn and wheat, and having stable nitrogen, phosphorus, and potassium raw material channels, a compound fertilizer production line is more suitable, and a slow-release fertilizer processing unit can be added to enhance product competitiveness; if focusing on specialty plantings such as fruit trees and medicinal herbs, a customized formula production line (supporting precise addition of micronutrients) can create a differentiated advantage. At the same time, capacity planning must match market capacity; small farms should choose a 10,000-30,000 tons/year production line, while regional distributors can consider a scale of 50,000-100,000 tons/year.
Second, equipment and technological compatibility is crucial. When selecting equipment, prioritize communication with experienced fertilizer machine manufacturers to clarify core process requirements: For organic fertilizer production lines, focus on the fermentation system (aerobic fermentation requires ensuring even turning and mixing, while anaerobic fermentation requires controlled sealing) and deodorization equipment (biofilters offer low cost and photocatalytic deodorization efficiency); for compound fertilizer production lines, confirm the accuracy of the computer-automated batching system to avoid uneven nutrient distribution; and for bio-organic fertilizer production lines, low-temperature drying equipment is essential to protect the activity of beneficial bacteria. Regarding equipment materials, stainless steel is preferred for contact with corrosive raw materials, while carbon steel with rubber lining can be used for general applications to reduce costs. Furthermore, the level of automation should be selected based on needs; small lines can have simplified control, while medium-sized lines are recommended to be equipped with a PLC system for real-time monitoring.
Furthermore, environmental protection and policy compliance cannot be ignored. Currently, various regions have strict environmental requirements for fertilizer production. Production lines need to be equipped with pulse dust collectors to treat dust, fermentation exhaust gases need to be equipped with ammonia and hydrogen sulfide purification devices, and washing wastewater should be designed with a recycling system. At the same time, pay attention to local policy incentives; for example, some regions offer equipment subsidies for organic fertilizer production lines. Prioritize technologies that meet the subsidy conditions to shorten the cost recovery period.
Finally, a rational calculation of return on investment is necessary. Besides equipment purchase costs, factors such as site rental, raw material transportation, and labor costs must also be considered. Small production lines have lower initial investment but limited profit margins; medium-sized lines, while requiring higher initial investment, can reduce unit costs through economies of scale. It is recommended to refer to similar cases, such as livestock farms using organic fertilizer production lines, which can increase returns through the dual revenue streams of manure treatment and fertilizer sales, ensuring the fertilizer production line matches the farm's resources and achieves sustainable operation.