The environmental protection program of the NPK fertilizer production line can start from the following aspects to achieve green and sustainable production:

1. Efficient and energy-saving production technology, optimize the production process: by improving the production process, improve the operating efficiency of organic fertilizer equipment, reduce energy consumption, thereby reducing carbon dioxide, nitrogen oxides and other greenhouse gas emissions.

2. Waste resource utilization technology: the waste generated in the production process, such as livestock manure, crop straw, etc., is harmless treatment and resource utilization to reduce the pollution of waste to the environment.

3. Waste gas treatment and purification: equipped with advanced waste gas treatment equipment, such as water washer, cyclone dust collector, etc., to purify the waste gas generated in the production process to ensure that the exhaust gas is discharged up to standard. The use of efficient waste gas purification technology, effectively reduce volatile organic compounds (VOC) and particulate matter emissions.

4. Wastewater treatment and recycling: The use of advanced wastewater treatment technology to treat the wastewater generated in the production process to ensure that the wastewater is discharged up to standard. Nutrients in wastewater can be recovered and utilized through nutrient restoration system to reduce water pollution.

5. Precision agriculture and customized solutions: According to specific agricultural needs, develop customized NPK formulations to optimize nutrient absorption and reduce fertilizer waste.

6. Intelligent and automatic control: The use of robots and artificial intelligence technology to achieve automation and intelligence in the production process, reduce human error, and improve production efficiency.

Through the above measures, the NPK fertilizer production line can not only effectively reduce the impact on the environment, but also improve production efficiency and product quality, and promote the sustainable development of the industry.