猪粪好氧堆肥过程有机质降解和热量平衡模型  

Modeling of Organic Matter Degradation and Thermal Balance during Pig Slurry Aerobic Composting

作　　者：王永江[1] 黄光群[1] 韩鲁佳[1] 

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业机械学报》2011年第10期121-124,115,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十一五"国家科技支撑计划资助项目(2006BAD10B05);中国农业大学研究生科研创新专项资助项目

摘　　要：依据有机质降解一级动力学方程和系统热量平衡方程,充分考虑猪粪好氧堆肥有机质降解的梯次性对数学建模的影响,建立了反应器好氧堆肥过程有机质降解Monod模型和热量平衡模型。有机质降解Monod模型考虑了温度、含水率、氧体积分数和自由空域4种因素对降解系数的影响,其中温度作为最主要影响因素;热量平衡模型中主要考虑了对流、传导的热量传递方式。利用实验室好氧堆肥反应器进行的模型验证试验结果表明:堆肥试验实测值与模型模拟值表现出较好的一致性,有机质降解的实测值与模型模拟值的相对标准误差为13.02%,温度变化的实测值与模型模拟值的相对标准误差为9.9%。Modeling of organic matter degradation and thermal balance were built based on the first order assumption with respect to the quantity of biodegradable volatile solid（BVS） and the law of thermal conservation during composting.Different kinds of organic matter were mainly degraded in different composting stages.For the organic matter degradation model,temperature,moisture content,oxygen content and free air space were considered as key influence factors to degeneration rate.For the model of thermal balance,forced convention and conduction were considered as the main heat removal form.In order to verify the constructed models,an aerobic composting process of pig slurry was conducted.Temperature,oxygen content,moisture content and organic matter concentration were all monitored in the process of composting.The results could be helpful for guiding composting process operation.

关 键 词：猪粪 好氧堆肥 有机质降解 热量平衡 数学模型 

分 类 号：S141.4[农业科学—肥料学]