生物淋滤污泥的堆肥资源化利用

Composting and Resource Utilization of Bioleaching Sludge

生物淋滤污泥因含有一定的碳、氮、磷等土壤所需的养分和有机物,且已有效脱除重金属污染物,可作为肥料对贫瘠土壤进行修复和改良。本研究利用花生壳和木屑基质与淋滤后污泥进行好氧堆肥,考察不同材料与污泥堆肥过程的理化性质和生物学指标的差异,采用高通量测序对堆肥后污泥样品中微生物群落动态演变及优势菌的分布进行分析,并综合评价不同基质对污泥堆肥腐熟效果。

Bioleaching sludge contains nutrients and organic matter required by soil such as carbon,nitrogen and phosphorus,and it has effectively removed heavy metal pollutants.It can be used as fertilizer to repair and improve poor soil.In this study,peanut shell,sawdust matrix and leached sludge were used for aerobic composting,and the differences of physical and chemical properties and biological indexes between different materials and sludge composting process were investigated.The dynamic evolution of microbial community and the distribution of dominant bacteria in sludge samples after composting were analyzed by high-throughput sequencing,and the effects of different substrates on sludge composting were comprehensively evaluated.