猪粪和锯末联合堆肥的中试研究

以 3种配比的猪粪和锯末为原料 ,进行了联合堆肥中试研究。一次发酵采用温度反馈通气量控制的静态好氧堆肥系统 ,周期 1 5d ;二次发酵采用定期翻堆自然腐熟 ,周期 30d。试验分析了堆制过程中温度、含水率、有机质、pH值的变化。对堆肥产物的腐熟度和养分分析表明 ,3种配比的堆肥产物均可达到腐熟度要求。猪粪养分含量越高 ,产物养分越高。通过堆肥工艺的优化控制和加水措施 ,猪粪和锯末联合堆制可以在 4 5d内获得高质量的有机肥 ,具有良好的应用前景。

Composting Pig Manure with Sawdust on a Pilot Scale

Preparation of compost of pig manure and sawdust mixture was studied.The mixture was designed to have three ratios.For the primary fermentation,a static aerobic composting system with temperature-based feedback controlling aeration rate was used and lasted for 15 days.And for the secondary fermentation,windrow composting was adopted,with the pile turned up periodically.This stage lasted for 30 days.Changes in temperature,moisture,organic matter and pH were monitored during the entire process.Analysis of decomposability and nutrient contents of the composts of three different ratios showed that end-products of the composting were bio-stable and abundant in nutrients and that the higher the nutrient content of pig manure,the higher the nutrient content in compost.This shows that composting of mixture of pig manure and sawdust can produce high quality compost by optimizing the composting process for 45 days.