城市污泥的土地利用及其环境影响研究进展

随着我国城市化进程的加快和污水处理率的提高, 城市污泥数量急剧增加, 对污泥进行减量化、无害化、资源化处置是十分迫切的。城市污泥富含有机质和矿质元素,对土壤有改良作用,因此,污泥的土地利用是主要的污泥处置方式,但城市污泥中含有重金属、病原物及有毒有机物等,直接土地利用可能对生态环境带来严重危害,因此,探索安全合理的城市污泥土地利用方式具有十分重要的意义。从以下四个方面综述了近年来城市污泥土地利用的研究进展：(1)城市污泥处置方式；(2)城市污泥前处理；(3)城市污泥土地利用的环境污染；(4)植物对土壤的修复作用,并对城市污泥的合理土地利用进行了展望。

Land Use of Municipal Sludge and Its Environmental Impacts: Research Progress

Municipal sludge has increased dramatically with rapid urbanization and increasing sewage treatment rate in China, it is urgent to dispose the municipal sludge with minimization, harmlessness and resource utilization. The municipal sludge is rich in organic matter and minerals, which is beneficial to improving soil chemical and physical properties. Therefore, the land use of municipal sludge is one of the main disposals. But the municipal sludge also contains considerable amounts of heavy metals, pathogens and toxic organics, its direct land use may be seriously harmful to eco-environment, therefore, it is of great significance to explore safety and reasonable disposal technologies of municipal sludge. The study reviewed the recent research advances of municipal sludge land use from the following four aspects: (1)the municipal sludge disposal method; (2) the pre-treatment of municipal sludge; (3) the environmental pollution of municipal sludge land use; (4) the restorative effect of plants on municipal sludge, and discussed future development of reasonable land use of municipal sludge.