堆肥处理过程中猪粪有机物的动态变化特征

Transformation of Organic Matter During Thermophilic Composting of Pig Manure

为了解猪粪堆肥过程中各种有机物的变化特征,并为判断猪粪堆肥腐熟度提供参考指标,进行42d的高温好氧堆肥.结果表明,堆体中的有机质含量呈下降趋势;水溶性有机碳(DOC)含量在第10d达到最大值,之后呈下降趋势;易分解有机质含量呈下降趋势,但在高温开始阶段呈上升趋势;腐殖质含量呈上升趋势.说明堆肥过程中有机物不断向腐殖化方向转化.在研究H/F变化时发现,它与判断堆肥腐熟度常用的化学指标(有机质、DOC)呈一定的相关性,而且与易分解有机质和腐殖质也有较好的相关性.

Thermophilic composting of pig manure was studied in an attempt to elaborate upon organic matter transformation during the process and provided parameters for product maturity using chemical method, The following parameters were measured in 11 samples during the 42 days of composting; organic matter, dissolved organic carbon （DOC）, degradable organic matter and humic matter （HM）, Organic matter decreased during composting process constantly; DOC concentration increased to maximum at 10 days and declined thereafter; degradable organic matter decreased whole composting, but they increased in start of high-temperature stage; The increasing level of HM at various stages of composling indicate the progression of humification; H/F provide information eorrdating to conventional chemical parameters （organic matter, DOC） of compost maturity. Moreover, H/F has correlating to degradable organic matter and HM.