TY - JOUR
T1 - Treatment of rich ammonia nitrogen wastewater with polyvinyl alcohol immobilized nitrifier biofortified constructed wetlands
AU - Wang, Wei
AU - Ding, Yi
AU - Wang, Yuhui
AU - Song, Xinshan
AU - Ambrose, Richard F.
AU - Ullman, Jeffrey L.
AU - Winfrey, Brandon K.
AU - Wang, Junfeng
AU - Gong, Juan
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Polyvinyl alcohol (PVA) immobilized nitrifier was adopted to enhance the treatment of wastewater containing rich ammonia nitrogen (NH4-N) in constructed wetlands (CWs). NH4-N removal in immobilized nitrifier biofortified constructed wetlands (INB-CWs) was positively correlated with the dosage of PVA pellets. INB-CWs planted with Canna indica L. exhibited removal efficiencies of 46% NH4-N, 43% total nitrogen and 65% COD, which are significant higher than control. INB-CWs outperformed the unplanted and non-immobilized constructed wetland or nitrifier suspension system. The ideal reaction conditions for treating synthetic wastewater containing 200 mg L-1 NH4-N were obtained as follows: pH, 8.5; dissolved oxygen, 4.0 mg L-1; temperature, 30 °C and PVA pellets dosage, 60 g L-1. In addition, degradation of PVA pellets accelerated nitrification. Results indicated that the PVA immobilized nitrifier had great potential applications for treating wastewater containing rich ammonia nitrogen in CWs.
AB - Polyvinyl alcohol (PVA) immobilized nitrifier was adopted to enhance the treatment of wastewater containing rich ammonia nitrogen (NH4-N) in constructed wetlands (CWs). NH4-N removal in immobilized nitrifier biofortified constructed wetlands (INB-CWs) was positively correlated with the dosage of PVA pellets. INB-CWs planted with Canna indica L. exhibited removal efficiencies of 46% NH4-N, 43% total nitrogen and 65% COD, which are significant higher than control. INB-CWs outperformed the unplanted and non-immobilized constructed wetland or nitrifier suspension system. The ideal reaction conditions for treating synthetic wastewater containing 200 mg L-1 NH4-N were obtained as follows: pH, 8.5; dissolved oxygen, 4.0 mg L-1; temperature, 30 °C and PVA pellets dosage, 60 g L-1. In addition, degradation of PVA pellets accelerated nitrification. Results indicated that the PVA immobilized nitrifier had great potential applications for treating wastewater containing rich ammonia nitrogen in CWs.
KW - Biofortification
KW - Constructed wetlands
KW - Immobilized pellets
KW - Nitrification
KW - Rich ammonia nitrogen
UR - https://www.scopus.com/pages/publications/84973160982
U2 - 10.1016/j.ecoleng.2016.05.078
DO - 10.1016/j.ecoleng.2016.05.078
M3 - Article
AN - SCOPUS:84973160982
SN - 0925-8574
VL - 94
SP - 7
EP - 11
JO - Ecological Engineering
JF - Ecological Engineering
ER -