摘要
THE water treatment method most commonly used today was formulated in Belgium in 1902.Entailing the four steps of flocculation,sedimentation,filtration,and disinfection,it played an important role in facilitating economic and social development in the last century.Since the1980s,when chemical fertilizer began being used and promoted in China,the country’s water resources have become polluted to varying extents.The traditional method of water treatment
THE water treatment method most commonly used today was formulated in Belgium in 1902.Entailing the four steps of flocculation,sedimentation,filtration,and disinfection,it played an important role in facilitating economic and social development in the last century.Since the1980s,when chemical fertilizer began being used and promoted in China,the country＇s water resources have become polluted to varying extents.
