Department of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China.
Department of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China.
Chemosphere. 2020 Jun;249:126134. doi: 10.1016/j.chemosphere.2020.126134. Epub 2020 Feb 5.
Presence of heavy metals in the wastewater sludge has greatly hindered sludge land application. Bioleaching has been developed for heavy metal removal from sludge. The pH of the sludge is declined by microorganisms with S or FeS as energy source. Sludge considered to be used in land is mainly due to its fertilizer values as it contains nitrogen, phosphorus, and potassium. Therefore, it is important to understand how the bioleaching would impact on sludge characterization. In addition, pathogens are great threat to human health. The ability of pathogen elimination of bioleaching is highly concerned. In this review, the major heavy metals in the sludge are summarized. The change of nitrogen, phosphorus, and potassium after bioleaching is stated. The pathogen elimination due to bioleaching has been discussed. The work has provided an insight of research need in sludge bioleaching with the aim of residual sludge land application.
污水污泥中重金属的存在极大地阻碍了污泥的土地应用。生物沥滤技术已被开发用于从污泥中去除重金属。微生物以 S 或 FeS 作为能源，降低了污泥的 pH 值。被认为可用于土地的污泥主要因其作为肥料的价值，因为它含有氮、磷和钾。因此，了解生物沥滤会如何影响污泥特性非常重要。此外，病原体对人类健康构成巨大威胁。生物沥滤去除病原体的能力备受关注。在这篇综述中，总结了污泥中的主要重金属。阐述了生物沥滤后氮、磷、钾的变化。讨论了生物沥滤去除病原体的情况。这项工作为剩余污泥土地应用的目的提供了对污泥生物沥滤研究需求的深入了解。
