title: [Urban non-point source pollution control by runoff retention and filtration pilot system].
abstract: A runoff retention and filtration pilot system was designed and the long-term purification effect of the runoff was monitored. Runoff pollution characters in 2 typical events and treatment effect of the pilot system were analyzed. The results showed that the runoff was severely polluted. Event mean concentrations (EMCs) of SS, COD, TN and TP in the runoff were 361, 135, 7.88 and 0.62 mg/L respectively. The runoff formed by long rain presented an obvious first flush effect. The first 25% flow contributed more than 50% of the total pollutants loading of SS, TP, DTP and PO4(3-). The pilot system could reduce 100% of the non-point source pollution if the volume of the runoff was less than the retention tank. Otherwise the overflow will be purification by the filtration pilot system and the removal rates of SS, COD, TN, TP, DTP and PO4(3-) reached 97.4% , 61.8%, 22.6%, 85.1%, 72.1%, and 85.2% respectively. The system was stable and the removal rate of SS, COD, TN, and TP were 98.6%, 65.4%, 55.1% and 92.6%. The whole system could effectively remove the non-point source pollution caused by runoff.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. whitethu04@gmail.com
authors.forename: Yao
authors.initials: Y
authors.lastname: Bai
authors.forename: Jian-E
authors.initials: JE
authors.lastname: Zuo
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Gan
authors.forename: Thong Soon
authors.initials: TS
authors.lastname: Low
authors.forename: Heng-Feng
authors.initials: HF
authors.lastname: Miao
authors.forename: Wen-Quan
authors.initials: WQ
authors.lastname: Ruan
authors.forename: Xia
authors.initials: X
authors.lastname: Huang
mesh_terms: D002681:China; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods; D005374:Filtration / Q000379:methods; D010758:Phosphorus / Q000032:analysis / Q000302:isolation & purification; D010865:Pilot Projects; D011891:Rain; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*; D014876:Water Pollution / Q000517:prevention & control*; D018508:Water Purification / Q000379:methods
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus