When the organic fertilizer equipment is in operation, the odor can be eliminated through the following multiple methods:

1. Source control: Prioritize the use of raw materials with relatively less odor, such as rice husks, straw, and leaves. Avoid using raw materials that are high in protein and fat and prone to generating odors, such as fish innards and untreated livestock and poultry manure.

2. Optimize the fermentation process: By adjusting the aeration of production materials, reduce the generation of odors. The processing time varies depending on the type of organic matter. However, during composting, if the time is not long enough, it will lead to insufficient nutrients in the organic fertilizer and at the same time produce an unpleasant smell.

3. Physical method: Increase the ventilation volume in the workshop and promptly expel the foul odors outside the workshop. Ventilation ducts and exhaust fans can be installed in the workshop to keep the air circulating.

4. Chemical method: Through equipment such as spray towers, the waste gas is brought into contact with the chemical absorption liquid, so that the harmful substances in the waste gas are absorbed or dissolved by the absorption liquid. This method is suitable for treating medium-concentration odors, but it may generate secondary pollutants such as wastewater.

5. Combined process: In practical applications, it is often necessary to adopt a process that combines multiple methods based on the specific conditions of the organic fertilizer workshop and the components of the odor. For instance, most of the malodorous gases can be expelled from the workshop through ventilation and air exchange first, and then the remaining malodorous gases can be treated by adsorption or biological deodorization methods.

6. Other precautions: Regularly inspect and maintain the odor treatment equipment to ensure its normal operation and treatment effect.

Through the above measures, the odor produced during the operation of the organic fertilizer production line can be effectively reduced, the comfort of the production environment can be improved, and the impact on the surrounding environment can be minimized at the same time.