naa a22 4500 510750451 CHVBK 20180411083102.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11270-013-1488-2 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1488-2 Impact of Water Quality Parameters on the Clogging of Vertical-Flow Constructed Wetlands Treating Urban Wastewater [Elektronische Daten] [Abdulkadir Sani, Miklas Scholz, Akintunde Babatunde, Yu Wang] In theory, biological and physical clogging, induced as a result of potentially excessive formation of biomass from degradation of pollutants and retention of inert suspended fine particles, respectively, should result in a decrease of treatment performance. However, some wetlands are not prone to clogging in practice. The aim of this study was to compare the impact of different design (aggregate size) and operational (contact time, empty time and chemical oxygen demand [COD] loading) variables on the treatment efficiency and clogging processes. Different vertical-flow constructed wetlands were constructed and operated from June 2011 until June 2012. Data from June 2011 (setting-up period) were not used. The filter with the highest COD loading performed the worst in terms of outflow COD concentration (120mg/l) but best in terms of COD load reduction (61%). The wetland with the largest aggregate size had the lowest mean nitrate-nitrogen outflow concentration of 1.2mg/l. However, the results were similar regardless of aggregate size (10 versus 20mm) and resting time (24 versus 48h) for most water quality variables. However, different COD inflow concentrations (COD of 146mg/l versus COD of 312mg/l) had a significant (p < 0.05) impact on the treatment performance for COD, ammonia-nitrogen, ortho-phosphate-phosphorus and suspended solids (SS). Serious clogging phenomena impacting negatively on the treatment performance were not observed for any columns. However, a small aggregate diameter, a short contact time, a long resting time and a low COD inflow concentration were most beneficial in reducing SS accumulation within the wetland filters. Springer Science+Business Media Dordrecht, 2013 Aggregate size nationallicence Chemical oxygen demand nationallicence Contact time nationallicence Phosphorus nationallicence Resting time nationallicence Suspended solids nationallicence Sani Abdulkadir Civil Engineering Research Centre, School of Computing, Science and Engineering, The University of Salford, Newton Building, M5 4WT, Salford, England, UK aut Scholz Miklas Civil Engineering Research Centre, School of Computing, Science and Engineering, The University of Salford, Newton Building, M5 4WT, Salford, England, UK aut Babatunde Akintunde Institute of Environmnet and Sustainability, Cardiff School of Engineering, Cardiff University, Queen's Buildings, The Parade, CF24 3AA, Cardiff, Wales, UK aut Wang Yu Civil Engineering Research Centre, School of Computing, Science and Engineering, The University of Salford, Newton Building, M5 4WT, Salford, England, UK aut Water, Air, & Soil Pollution Springer Netherlands 224/3(2013-03-01), 1-18 0049-6979 224:3<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1488-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1488-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sani Abdulkadir Civil Engineering Research Centre, School of Computing, Science and Engineering, The University of Salford, Newton Building, M5 4WT, Salford, England, UK aut NATIONALLICENCE 700 1- Scholz Miklas Civil Engineering Research Centre, School of Computing, Science and Engineering, The University of Salford, Newton Building, M5 4WT, Salford, England, UK aut NATIONALLICENCE 700 1- Babatunde Akintunde Institute of Environmnet and Sustainability, Cardiff School of Engineering, Cardiff University, Queen's Buildings, The Parade, CF24 3AA, Cardiff, Wales, UK aut NATIONALLICENCE 700 1- Wang Yu Civil Engineering Research Centre, School of Computing, Science and Engineering, The University of Salford, Newton Building, M5 4WT, Salford, England, UK aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/3(2013-03-01), 1-18 0049-6979 224:3<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer