naa a22 4500 510821286 CHVBK 20180411083533.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11814-012-0139-4 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0139-4 Effect of supplying a carbon extracting solution on denitrification in horizontal subsurface flow constructed wetlands [Elektronische Daten] [Yi Ding, Xinshan Song, Yuhui Wang, Denghua Yan] Denitrification strongly depends on the availability of carbon source in constructed wetlands (CWs). In this study, several relevant carbon source extracting solutions made from hydrolyzate of selected wetland litters were added to CWs for nitrogen removal enhancement. The feasibility of supplying a carbon extracting solution to improve potential denitrification rate in horizontal subsurface flow constructed wetland was deeply investigated. Combinations of different hydraulic retention time (HRT, especially for 2-day and 4-day) with different influent COD/N ratios were designed to prove the enhancement on denitrification by carbon source supplement. In addition, specific denitrification rate (SDNR) was calculated for the comparison of the nitrogen removal at different COD/N ratios. The sequential operation results on total nitrogen (TN) and nitrate (NO 3 − -N) removal efficiencies were obtained in CW system with an influent COD/N ratio of 4.0. The accumulation of nitrite (NO 2 − -N) was found to be closely related to the removal of NO 3 − -N. Meanwhile, no obvious accumulation of NO 2 − -N was found when the removal of NO 3 − -N was relatively high. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Carbon Extracting Solution nationallicence COD/N Ratio nationallicence Denitrification nationallicence Horizontal Subsurface Flow Constructed Wetland nationallicence Nitrogen Removal nationallicence Ding Yi College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut Song Xinshan College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut Wang Yuhui College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut Yan Denghua College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/2(2013-02-01), 379-384 0256-1115 30:2<379 2013 30 11814 https://doi.org/10.1007/s11814-012-0139-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0139-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ding Yi College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut NATIONALLICENCE 700 1- Song Xinshan College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut NATIONALLICENCE 700 1- Wang Yuhui College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut NATIONALLICENCE 700 1- Yan Denghua College of Environmental Science & Engineering, Donghua University, No2999, Renmin North, Songjiang District, 201620, Shanghai, China aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/2(2013-02-01), 379-384 0256-1115 30:2<379 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer