Effects of salinity on treatment of municipal wastewater by constructed mangrove wetland microcosms

Yan WU, N.F.Y. TAM, Ming Hung WONG

Research output: Contribution to journalArticles

65 Citations (Scopus)

Abstract

The effects of salinity on the removal of dissolved organic carbon and nutrients from municipal wastewater by constructed mangrove microcosms planted with Aegiceras corniculatum were investigated. During the four-month wastewater treatment, the treatment efficiency was reduced by high salinity, and the removal percentages of dissolved organic carbon, ammonia-N and inorganic N dropped from 91% to 71%, from 98% to 83% and from 78% to 56%, respectively, with salinity increasing from 0 to 30 parts per thousands (ppt). In spite of such inhibition at high salinity, 100% of the effluents discharge from the constructed mangrove microcosms still complied with the discharge standards set by the Hong Kong Government for Coastal Water Control Zones. These results suggested that constructed mangrove wetland treatment systems were promising to effectively treat municipal wastewater, even those with high salinity. In addition, the denitrification potential in soil was found to be retarded by the high salinity while mangrove plants grew best at 15 ppt salinity condition. Copyright © 2008 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)727-734
JournalMarine Pollution Bulletin
Volume57
Issue number6-12
DOIs
Publication statusPublished - 2008

Citation

Wu, Y., Tam, N. F. Y., & Wong, M. H. (2008). Effects of salinity on treatment of municipal wastewater by constructed mangrove wetland microcosms. Marine Pollution Bulletin, 57(6-12), 727-734. doi: 10.1016/j.marpolbul.2008.02.026

Keywords

  • Aegiceras corniculatum
  • Mangroves
  • Salinity
  • Dissolved organic carbon (DOC)
  • Nutrients

Fingerprint Dive into the research topics of 'Effects of salinity on treatment of municipal wastewater by constructed mangrove wetland microcosms'. Together they form a unique fingerprint.