Sewage sludge contains abundant plant nutrition, which could improve the physical and chemical character of the soil while applying sewage sludge into the crop land and increase the yields.

• 城市污泥中含有大量的植物营养元素,其土地利用能改善土壤的理化性质,提高作物产量,减少污泥对环境的二次污染,从而实现污泥的资源化、无害化、稳定化和减量化处置目标。