污水处理厂剩余污泥用作果园肥料的初步研究

Discussion on the Application of Residual Sludge of SWUST Wastewater Treatment Plant to Orchard

在总结城市污水处理厂剩余污泥常用处置方法的基础上,重点对西南科技大学污水处理厂剩余污泥用作果园肥料的可行性进行了研究。通过对该污泥组分的分析,以及与果园土组分、有机肥料标准的比较分析,得出以下结果:西南科技大学污水处理厂剩余污泥是一种富含氮、磷的有机肥料,只要能够有效降低污泥中镉、汞等重金属的含量,作为有机肥长期施用于果园是可行的,并就如何有效降低污泥中重金属含量提出了相应对策。

On the basis of summarizing the disposal methods of municipal wastewater treatment plants, the article mainly studied the feasibility that residual sludge of Southwest University of Science and Technology （SWUST） Wastewater Treatment Plant was applied to the orchard. By analyzing the sludge composition, comparing with the orchard soil and with the relevant indicators of organic fertilizer standard, the results reveal that residual sludge of SWUST Wastewater Treatment Plant is an organic fertilizer that is rich in nitrogen and phosphorus. If only the content of cadmium and mercury in the residual sludge could be reduced effectively, it would be feasible that the residual sludge is applied to orchard chronically as an organic fertilizer. And the measures to reduce the content of heavy metals in the residual sludge were made in this paper.