奶牛粪条垛式模拟堆肥腐熟度及微生物群落结构变化
发布时间：2018-07-14 12:07
【摘要】：为降低堆肥成本、促进资源化利用和集约化养殖场奶牛粪污处理,采用小型堆肥反应器,研究利用奶牛粪污压榨残渣进行无辅料添加条垛式堆肥的可行性.堆肥过程中监测物料温度和各种理化指标的变化,并跟踪解析微生物群落.条垛式模拟堆肥共持续75 d,肥堆温度维持50℃以上达10 d,水分含量逐渐降低.pH在开始阶段略有增加后最终降低到约8.0.有机物降解率在堆肥前30 d迅速增加,而后逐渐增加到57.8%,C/N随着有机物的降解降低到9.75.NH_4~+在堆肥进行20 d后显著降低,由于硝化作用NO_3~-逐渐增加,最终产品中未检测到NH_4~+,NO_3~-含量达到2 208.8 mg/kg(干重).堆肥结束时物料的电导率为2 250.8μS/cm,低于文献推荐限值3 000μS/cm;成熟堆肥的种子发芽指数达到120.4%.高通量测序结果显示,微生物群落结构在堆肥前期发生了显著变化,堆肥后期则保持相对稳定,氨氧化细菌Nitrosococcus和硝化细菌Nitrolancea、Nitrospira进行了NH_4~+向NO_3~-的转化,堆肥19 d后硝化细菌占总细菌的比例达2%以上.综上,条垛式堆肥适合处理奶牛粪渣,可在无辅料添加情况下达到理想的堆肥效果,成熟堆肥质量优良.(图10表1参25)
[Abstract]:In order to reduce the cost of composting and promote the utilization of resources and intensive treatment of cow manure in the farm, the feasibility of adding stacked compost without auxiliary material was studied by using a small composting reactor. The changes of material temperature and physical and chemical indexes were monitored during composting, and microbial communities were analyzed. The results showed that the simulated composting lasted for 75 days, and the temperature of the compost kept above 50 鈩，
本文编号：2121595
[Abstract]:In order to reduce the cost of composting and promote the utilization of resources and intensive treatment of cow manure in the farm, the feasibility of adding stacked compost without auxiliary material was studied by using a small composting reactor. The changes of material temperature and physical and chemical indexes were monitored during composting, and microbial communities were analyzed. The results showed that the simulated composting lasted for 75 days, and the temperature of the compost kept above 50 鈩，
本文编号：2121595
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