不同通风量下猪粪好氧堆肥中氧气浓度的变化  

Variation of oxygen concentration in pig-manure composting piles under different aeration flowrates

作　　者：倪娒娣[1] 陈志银[1] 程绍明[1] 赵素芬[1] 

机构地区：[1]浙江大学农业生物环境工程研究所,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2005年第5期603-607,共5页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金资助项目(50175101)

摘　　要：采用强制通风静态筒堆肥系统,测量不同通风量下的堆体内的耗氧速率和氧气浓度,对堆肥过程中不同通风量下耗氧速率的差异、氧气浓度的动态变化进行了分析.结果表明,堆肥过程中耗氧速率和含水率有很大的关系,含水率偏高,耗氧速率下降,本实验中耗氧速率先降后升再下降,后期下降不明显;在整个堆肥过程中,堆体内的氧气浓度总体呈上升趋势,中后期氧气浓度增加比前期明显;停止通风后5 min内氧气消耗速率最快,之后消耗速度缓慢;本系统的最佳通风量为0.35 m3/min.Aerated static composting is one of the best choices for treating animal waste. Oxygen is an important factor influencing the composting process. The growth of aerobic microorganism, the composting duration and the quality of final product depend largely on the oxygen concentration in the pile and the oxygen suppling process. Aeration is necessary for aerobic composting. Different strengths of aeration have different effects on composting process. In order to estimate the optimal aeration flowrate and control the oxygen concentration in the composting process, It is necessary to examine the actual variation of oxygen concentration and oxygen consumption rate in the composting process. Forced aeration static barrel was used in this experiment. The barrel contained pig manure and bulking agent, The equipment used to measure the oxygen concentration was portable and numerical. The oxygen concentrations were measured at 0, 5, 10, 15 and 20 minutes after cessation of ventilation. And the variation of oxygen concentration during the first 5 rain interval after stopping ventilation was used as a measure of oxygen consumption. In order to study the oxygen dynamics, the oxygen concentration was monitored at the same time every several days, and the measured data were used to analyze the oxygen variation during the composting process.process and late phase of the process. The rate of oxygen decrease in the pile was fast during the first 5 minutes and then slowed down. The four piles showed different characteristics under different levels of aeration. It was concluded that the optimal flow rate of aeration is 0.35 m^3/min.

关 键 词：好氧堆肥 强制通风 氧气浓度 耗氧速率 

分 类 号：S141.4[农业科学—肥料学]