Cross-contamination prevention in organic fertilizer produciton line can be achieved through the following approaches:

1. Rational Planning and Layout: Plan production areas, raw material storage areas, finished product storage areas, and wastewater treatment areas to ensure clear functional areas and minimize cross-contamination.

2. Raw Material Management: Strictly screen raw materials to remove impurities and ensure quality. Keep raw material storage areas away from rivers and field drainage ditches to prevent wastewater from seeping into groundwater.

3. Equipment and Process Optimization: Adopt advanced production processes and organic fertilizer equipment to improve resource efficiency and reduce waste generation. Select low-noise, low-energy, and easy-to-maintain equipment to reduce noise and energy consumption during production. Strengthen the maintenance and management of waste gas treatment facilities, maintain contact with equipment providers, and maintain operational records.

4. Waste Gas, Wastewater, and Waste Residue Treatment: Install waste gas treatment equipment such as dust collectors and biological deodorizers to ensure that waste gas emissions meet emission standards. Build wastewater treatment facilities, such as sedimentation tanks and biochemical ponds, to treat wastewater for reuse or discharge in compliance with emission standards. Properly dispose of waste residue, such as recycling it into production or handing it over to a qualified facility for processing.

5. Operating Standards and Personnel Training: Develop detailed operating procedures to ensure that every step of the process complies with environmental protection requirements. Strengthen operator training to enhance their environmental awareness and operational skills.

These measures can effectively prevent cross-contamination in organic fertilizer production lines and ensure the environmental friendliness and safety of the production process.