基于水热协同效应的牛粪高效生物干化工艺及参数探究

Investigation of High-Efficiency Bio-Drying Process and Parameters for Cow Dung Based on Hydrothermal Synergistic Effect

摘要: 牛粪的高含水率限制了其资源化利用，因此，需要发展低碳节能的脱水预处理。其中，生物干化虽具潜力，但效率却受限于牛粪有机物的难降解特性。为强化牛粪生物干化的脱水效果，研究通过单因素实验，系统探究了回用接种比例、初始含水率、通风量及翻堆频率对干化进程的调控作用。结果表明，工艺参数的优化能显著提升干化效能。在初始含水率60%、通风量0.3 L·min⁻¹、翻堆频率2 d/次的条件下，回用接种比例为1:3时牛粪含水率下降最快，反应周期可缩短至8 d，水分去除率达84.96%。研究为牛粪生物干化工程的实际应用奠定了基础。

Abstract: The high moisture content of cow dung restricts its resource utilization. Therefore, low-carbon and energy-efficient dewatering pretreatment is needed. Bio-drying has potential. However, its efficiency is constrained by the low biodegradability of organic matter in cow dung. To enhance the dewatering performance of cattle manure bio-drying, this study systematically investigated the regulatory effects of inoculum recycling ratio, initial moisture content, aeration rate, and turning frequency on the drying process through single-factor experiments. The results showed that coordinated optimization of process parameters significantly improved drying performance. Under 60% initial moisture, an aeration rate of 0.3 L·min⁻¹, and turning every 2 days, the inoculation ratio of 1:3 achieved the fastest moisture reduction. The drying period was shortened to 8 days, and the water removal rate reached 84.36%. This study provides a practical basis for the engineering application of cow dung bio-drying.