title: The application of zero-water discharge system in treating diffuse village wastewater and its benefits in community afforestation.
abstract: The proposed on-site zero-water discharge system was comprised of four main components: anaerobic tank, aerobic bioreactor, activated soil filter and water-collecting well. The results demonstrate that at 350 m(3) day(-1) of hydraulic load, the system can effectively remove pollutants from the wastewater, e.g., 86% removal of COD; 87% removal of SS; 80% removal of TP and 71% removal of TN. The growth states of the grasses, macrophytes and arbors in the activated soil filter were better than the control. The life of the activated soil filter was estimated to be ~12-15 yrs, based on the laboratory microcosm studies. However, humic acid contents and soil porosity have suggested that the activated soil filter was able to regenerate itself and thereby prolonging its life by reducing clogging of the pores. The results suggest that the zero-water discharge system was a promising bio-measure in treating diffuse village wastewater and benefiting community afforestation.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, 71 Beijing East Road, Nanjing 210008, China. yhwu@issas.ac.cn
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Wu
authors.forename: Lizhong
authors.initials: L
authors.lastname: Xia
authors.forename: Zhengyi
authors.initials: Z
authors.lastname: Hu
authors.forename: Shuzhi
authors.initials: S
authors.lastname: Liu
authors.forename: Hongbin
authors.initials: H
authors.lastname: Liu
authors.forename: Bibhash
authors.initials: B
authors.lastname: Nath
authors.forename: Naiming
authors.initials: N
authors.lastname: Zhang
authors.forename: Linzhang
authors.initials: L
authors.lastname: Yang
mesh_terms: D000332:Aerobiosis; D019149:Bioreactors; D005374:Filtration / Q000379:methods; D016468:Forestry / Q000379:methods*; D006801:Humans; D012987:Soil / Q000737:chemistry; D014197:Trees / Q000254:growth & development*; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000517:prevention & control*
chemical_list: D012987:Soil; D014874:Water Pollutants, Chemical