title: Effectiveness of Vegetated Drainage Ditches for Domestic Sewage Effluent Mitigation.
abstract: Plant species have an important role in eco-ditches; however, the Michaelis-Menten kinetic parameters of nutrient uptake, growth rate and purification efficiency of ditch plants and their influences on domestic sewage treatment efficiency are still unclear. Growth rates of all nine species, but especially Lemna gibba, Cladophora and Myriophyllum verticillatum were best in undiluted domestic sewage as opposed to a mixture of domestic sewage. Performance of species to accumulate nutrients was not only species-specific, but was also affected by both sewage treatments. Removal efficiency of nutrients was dependent on both plant species and treatment. Uptake kinetic parameters were significantly affected by both nutrient form and plant species. The maximum uptake rate (Vmax) of NH4-N was higher than NO3-N. Similarly, Km values for NH4-N were greater than NO3-N. These results could be used to identify plants for sewage treatment efficiency and enhance water quality in eco-ditch treatment systems.
authors.affiliation: Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, #.9, Block 4, Ren min nan Road, Chengdu, 610041, People's Republic of China.|Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China.|University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.|Department of Natural Resources and Environmental Management, University of Lubumbashi, PO Box 1825, Lubumbashi, Democratic Republic of Congo.
authors.forename: Mathieu Nsenga
authors.initials: MN
authors.lastname: Kumwimba
authors.affiliation: Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, #.9, Block 4, Ren min nan Road, Chengdu, 610041, People's Republic of China. bzhu@imde.ac.cn.|Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China. bzhu@imde.ac.cn.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhu
mesh_terms: D029023:Acorus / Q000378:metabolism; D064751:Ammonium Compounds / Q000032:analysis; D029064:Araceae / Q000378:metabolism; D028041:Centella / Q000378:metabolism; D000460:Chlorophyta / Q000378:metabolism; D029786:Cyperus / Q000378:metabolism; D004323:Drainage, Sanitary; D017753:Ecosystem; D030681:Ficus / Q000378:metabolism; D029561:Lythraceae / Q000378:metabolism; D008962:Models, Theoretical; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012722:Sewage / Q000737:chemistry*; D013045:Species Specificity; D064028:Tracheophyta / Q000378:metabolism; D018505:Waste Management / Q000379:methods*; D019862:Zingiberales / Q000378:metabolism
chemical_list: D064751:Ammonium Compounds; D009566:Nitrates; D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen
keywords: Eco-ditches; Nutrient uptake; Plant species; Purification capacity; Uptake kinetics parameters