<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Sun, Haimeng</style></author><author><style face="normal" font="default" size="100%">Yang, Zhongchen</style></author><author><style face="normal" font="default" size="100%">Wei, Caijie</style></author><author><style face="normal" font="default" size="100%">Wu, Weizhong</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Nitrogen removal performance and functional genes distribution patterns in solid-phase denitrification sub-surface constructed wetland with micro aeration</style></title><secondary-title><style face="normal" font="default" size="100%">BIORESOURCE TECHNOLOGY</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">SEP</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">263</style></volume><pages><style face="normal" font="default" size="100%">223-231</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">An up-flow vertical flow constructed wetland (AC-VFCW) filled with ceramsite and 5% external carbon source poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) as substrate was set for nitrogen removal with micro aeration. Simultaneous nitrification and denitrification process was observed with 90.4% NH4+-N and 92.1% TN removal efficiencies. Nitrification and denitrification genes were both preferentially enriched on the surface of PHBV. Nitrogen transformation along the flow direction showed that NH4+-N was oxidized to NO3–N at the lowermost 10 cm of the substrate and NO3–N gradually degraded over the depth. AmoA gene was more enriched at -10 and -50 cm layers. NirS gene was the dominant functional gene at the bottom layer with the abundance of 2.05 x 10(7) copies g(-1) substrate while nosZ gene was predominantly abundant with 7.51 x 10(6) and 2.64 x 10(6) copies g(-1) substrate at the middle and top layer, respectively, indicating that functional division of dominant nitrogen functional genes forms along the flow direction in AC-VFCW.</style></abstract></record></records></xml>