畜禽粪便超高温好氧堆肥工程案例

Hyperthermophilic composting of livestock manure:A case study

超高温好氧堆肥是高效、绿色的有机固体废弃物资源化技术,为了弥补超高温好氧堆肥在大规模工程性处理研究中的不足,通过对规模化畜禽粪便超高温好氧堆肥工程案例(处理量300 t·d^(-1))的分析,阐述了超高温好氧堆肥在工程应用中的原理、工艺选择、运行参数以及经济效益。槽式及条垛式规模化畜禽粪便超高温好氧堆肥的最高温度可超过80℃,20~30 d完成堆肥。堆肥结束后,含水率和有机质分别保持在44%和35%左右,EC值为2.9 mS·cm^(-1),水溶性有机碳和水溶性总氮的含量分别保持在3.0 mg·kg^(-1)和0.9 mg·kg^(-1)。此外,腐熟料经过二次加工,可制备为功能性有机肥料。超高温好氧堆肥投资成本小、产品价值高,具有更高的经济效益。目前,已形成的可复制的畜禽粪便循环利用新模式,可为农林残余、生活垃圾、厨房残余等其他有机固废的规模化超高温好氧堆肥处置提供参考。

Hyperthermophilic composting is an efficient and green resource recycling technology of organic solid waste.To address the lack of engineering research on large-scale hyperthermophilic composting,a case of large-scale livestock manure hyperthermophilic composting was investigated(300 t·d^(-1)),including the principles,process selection,operating parameters,and economic benefits in the application of the hyperthermophilic composting process.The results showed that the maximum temperature for large-scale hyperthermophilic composting of livestock manure was above 80℃,and fermentation was completed in 20 to 30 days with trough and windrow composting.After composting,the moisture content and organic matter were maintained at approximately 44%and 35%,respectively,the EC value was 2.9 mS·cm^(-1),and the levels of water-soluble organic carbon and water-soluble total nitrogen were maintained at 3.0 mg·kg^(-1) and 0.9 mg·kg^(-1),respectively.Moreover,the decomposed material could be prepared into functional organic fertilizer after secondary processing.Hyperthermophilic composting has low investment cost,high product value,and increased economic benefits.Currently,a new model of reproducible recycling and utilization of livestock manure has been developed,which can provide a reference for the large-scale hyperthermophilic composting disposal of organic solid waste,such as agricultural and forestry residues,domestic waste,and kitchen residue.