2000/11/1/ · The amount of wastewater and solid wastes produced is increasing along with economic development. According to statistical, the amount of the total wastewater discharged in 1998 was about 39.53 billion m 3, including 20.05 billion m 3 industrial wastewater and 19.48 billion m 3 municipal wastewater (State Statistical Bureau, P.R. China, 1999).However, the