A national legislator has urged the government to explore more channels to use sludge from sewage disposal as a resource, because the output of such waste is increasing each year. The daily sewage disposal capacity in China"s urban areas has reached 220 million metric tons, with over 60 million tons of sludge with a moisture content of 80 percent generated during the disposal process each year, said Cheng Hanfei, a National People's Congress deputy from Anhui province who is also chief engineer of an environmental protection company affiliated with State-owned China Minmetals Corporation. Considering that the proportion of waste water