Answer: The odors produced during organic fertilizer manufacturing are primarily caused by harmful gases—such as hydrogen sulfide and ammonia—resulting from raw material decomposition and incomplete fermentation. Effective odor control can be achieved through a four-pronged approach: raw material treatment, fermentation process optimization, waste gas treatment, and on-site management. This strategy offers low costs and long-lasting results.
First, implement raw material pretreatment. Raw materials such as livestock manure and crop straw should be air-dried to reduce moisture content, thereby preventing the foul odors caused by anaerobic fermentation in stagnant water. Additionally, removing rotten or spoiled impurities helps minimize odor generation at the source.
Second, optimize the fermentation process. This is the core step; production requires strict control of the carbon-to-nitrogen (C/N) ratio and the use of specialized fermentation microbial strains to accelerate material decomposition. Regular turning and aeration prevent anaerobic fermentation and inhibit odor formation. Simultaneously, controlling the fermentation temperature ensures thorough decomposition, significantly reducing odor.
Third, ensure effective waste gas collection and treatment. For open-air storage yards, spraying biological deodorizers can rapidly break down odor-causing molecules. In production workshops, installing gas collection systems—paired with spray towers and activated carbon adsorption units—allows for centralized waste gas treatment before discharge, preventing odor from spreading.
Finally, strengthen daily management. Promptly clear away scattered materials, stagnant water, and residues to keep the site dry and well-ventilated. Rationally plan production zones and separately stack raw materials and finished products to avoid prolonged accumulation and fermentation, thereby maintaining continuous control over odor pollution.
