State of the Art Review on Landfill and Leachates Treatment in China

The main objectives of this study were to describe the municipal solid waste management, leachate characteristics of China landfills, and to summarize the present research of leachate treatments in china such as biological treatment, physical and chemical treatment and land treatment. In the survey of leachate from landfill in Chinese megapolis, the quality is characterized by chemical oxygen demand (COD) of 1500-80000 mg/L, biochemical oxygen demand (BOD) of 200-35000 mg/L, ammonia nitrogen (NH3-N) of 50-2400 mg/L, total nitrogen of 80-2600 mg/L, suspended solid of 30-7000 mg/L and pH value of 5-7.8. In engineering practices of China, the biological systems are usually adopted. Meanwhile, as far as the special quality of leachate is concerned, some chemical treatments are used as the pre-treatment or post-treatment to promote the effluent or improve the biological degradability of leachate.