Abstract:In response to the issue of excessive sulfur dioxide residue in peanuts and their products, this study has developed a complete solution through pollution tracing and control technology. Collecting 120 batches of raw materials, processed semi-finished products, and commercially available products from the main production area of Longyan, the sulfur dioxide content was determined using acid-base titration method (GB 5009.34 first method). Combined with production process audit to identify key pollution nodes, it was found that the residual amount in the drying process increased sharply, and sulfur dioxide was detected in the finished products, which did not meet national standards. Develop a composite enzyme synergistic degradation technology and optimize the optimal process conditions through response surface methodology: reaction temperature of 40.2 ℃, composite enzyme activity addition of 48.6 U/g, reaction time of 1.1 h, and solid-liquid ratio of 1:11.3 g/mL. The results showed that the desulfurization rate of this process reached 92.5%, and the residual sulfur dioxide could be stably controlled at 1.1-7.4 mg/kg, which was lower than the national standard limit of ≤ 10 mg/kg, and had no significant effect on peanut quality (p>0.05). The brittleness retention rate was 97.1%, and the protein loss rate was only 2.1%. Research has confirmed that fumigation processes (accounting for 72.4%) and coal-fired heating systems (accounting for 22.9%) are the core sources of pollution. The "biological enzyme degradation technology+heat source fuel transformation (coal to biomass fuel)" scheme constructed can effectively block pollution pathways and provide technical support for the safe production of Longyan peanuts.