title: Treatment performance and microorganism community structure of integrated vertical-flow constructed wetland plots for domestic wastewater.
abstract: In order to investigate the treatment performance and microorganism mechanism of IVCW for domestic wastewater in central of China, two parallel pilot-scale IVCW systems were built to evaluate purification efficiencies, microbial community structure and enzyme activities. The results showed that mean removal efficiencies were 81.03 % for COD, 51.66 % for total nitrogen (TN), 42.50 % for NH4 (+)-N, and 68.01 % for TP. Significant positive correlations between nitrate reductase activities and TN and NH4 (+)-N removal efficiencies, along with a significant correlation between substrate enzyme activity and operation time, were observed. Redundancy analysis demonstrated gram-negative bacteria were mainly responsible for urease and phosphatase activities, and also played a major role in dehydrogenase and nitrate reductase activities. Meanwhile, anaerobic bacteria, gram-negative bacteria, and saturated FA groups, gram-positive bacteria exhibited good correlations with the removal of COD (p=0.388), N (p=0.236), and TP (p=0.074), respectively. The IVCW system can be used to treat domestic wastewater effectively.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
authors.forename: Su-qing
authors.initials: SQ
authors.lastname: Wu
authors.forename: Jun-jun
authors.initials: JJ
authors.lastname: Chang
authors.forename: Yanran
authors.initials: Y
authors.lastname: Dai
authors.forename: Zhen-bin
authors.initials: ZB
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Liang
mesh_terms: D057919:Biological Oxygen Demand Analysis; D004784:Environmental Monitoring; D005227:Fatty Acids / Q000032:analysis; D006090:Gram-Negative Bacteria / Q000302:isolation & purification / Q000378:metabolism; D006094:Gram-Positive Bacteria / Q000302:isolation & purification / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis* / Q000382:microbiology*; D014867:Water / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods; D053833:Wetlands
chemical_list: D005227:Fatty Acids; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical