城市污泥农用多种效应及前景分析

Analysis on Effect and Prospect of Agricultural Sewage and Sludge in City

城市污泥是一种富含有机质、高氮、高磷及多种微量元素的有机肥,并含有病原微生物、寄生虫卵等。分析了污泥农用过程中氮素矿化、磷的固定以及地下水硝酸盐污染、利用过程中的重金属变化情况;对污泥农用的方法和前景进行了分析,指出城市污泥农用是实现变废为宝、经济效益与生态效益相统一的可持续农业发展模式。

Sewage and sludge are a kind of organic fertilizer that is rich in organic matter, nitrogen and other microelements, and it also contains pathogeny microbes and parasitic ovum etc. The paper analyzes minimization of nitrogen , consolidation of phosphorus, the pollution of ground water caused by nitrate, the changes of heavy mental during agricultural sludge. And it also deals with how to use sludge reasonably so that the waste can be changed into resources and make sustainable development of agriculture mode that featured with unification of economic benefit, environmental benefit and ecological benefit as well.