Sludge in the rivers and water channels with a great variety of microorganisms has been neglected for a long time, and has caused a lot of problems for urban environmental management. We have developed a sludge property-based technology. Such patented technology can dry the sludge up. In the wake of high-speed economic development and increasing yield of the sludge, people are increasingly aware of the sludge treatment. The treating methods, including sludge drying, using the sludge as the fuel, land application, burning, and land filling, become feasible.