Sludge is the secondary pollutants that come from wastewater treatment. It has become solidwastepollution problem needed to be solved urgently.
污泥是废水处理之后引入的二次污染，它已经成为目前环境方面急需解决的固废污染问题。
2
Then, this article on the status of solidwastepollution in rural areas is introduced and a brief analysis of the causes of pollution in rural areas of solid analysis.
然后，本文对农村固体废物污染现状做了介绍，并简要分析了农村固体的污染原因分析。
3
Urban environment treatment includes urban air pollution treatment, urban water pollution treatment, urban solidwastepollution treatment and urban noise pollution treatment, etc.