1. Reduced waste disposal costs: By converting pig manure into organic fertilizer, farms can reduce the cost of waste disposal. Traditional waste disposal methods may require additional transportation and treatment costs, while the use of organic fertilizer production lines can convert these wastes into valuable products, thus saving treatment costs.

2. Additional economic benefits: farmers can earn additional income through the sale of organic fertilizers. The production and sale of organic fertilizers can bring new sources of income to farms and increase economic benefits.

3. Reduce the cost of fertilizer use: The use of organic fertilizer reduces the dependence on fertilizer and reduces the cost of farmers to buy fertilizer. The use of organic fertilizers can improve soil fertility and reduce the amount of fertilizer used, thus saving costs.

4. Improve the quality and market competitiveness of agricultural products: The application of organic fertilizers improves the quality and market competitiveness of agricultural products, which can indirectly increase farmers' income. High-quality produce can often be sold at a higher price, thereby increasing earnings.

5. Cost calculation: The cost of producing one ton of pig manure organic fertilizer ranges from 200 yuan to 300 yuan (depending on the project scale and local market conditions). Investing in the organic fertilizer equipment industry, whether it is the future or the market, is a good choice.

In summary, the use of pig manure organic fertilizer equipment can significantly reduce the cost of waste treatment, reduce the cost of fertilizer use, and bring additional economic benefits, thereby saving costs and improving economic efficiency.