The disposals and reutilization of sludge is one of the hottest points in environmental issues in the world, which have significant effect and application value for waste management in China.
污泥的合理有效处置是目前环境保护的重要内容之一，具有十分重要的意义和应用价值。
2
But the massive siliceous crushed stones pile up as solid wastedisposals in our country excessively because of the clay content.