Treatment of rich ammonia nitrogen wastewater with polyvinyl alcohol immobilized nitrifier biofortified constructed wetlands

Wei Wang, Yi Ding, Yuhui Wang, Xinshan Song, Richard F. Ambrose, Jeffrey L. Ullman, Brandon K. Winfrey, Junfeng Wang, Juan Gong

Research output: Contribution to journalArticleResearchpeer-review

27 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)7-11
Number of pages5
JournalEcological Engineering
Publication statusPublished - 1 Sep 2016
Externally publishedYes


  • Biofortification
  • Constructed wetlands
  • Immobilized pellets
  • Nitrification
  • Rich ammonia nitrogen

Cite this