Abstract:

Factors, limiting the agricultural use of sewage sludge (SS), were analyzed by introducing the properties of SS, combined with the market information of fertilizers. The factors including environmental risks of contaminants in SS, low nutrient content, high cost during transport and fertilization and the immature market status. The following countermeasures are suggested: using composting technique to stabilize SS; deep-processing; using SS as an agent that control soil nitrogen loss, and developing new market for SS.