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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...
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