TY - JOUR
T1 - Effects of salinity on treatment of municipal wastewater by constructed mangrove wetland microcosms
AU - Wu, Yan
AU - Tam, N. F.Y.
AU - Wong, M. H.
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
KW - Aegiceras corniculatum
KW - Dissolved organic carbon (DOC)
KW - Mangroves
KW - Nutrients
KW - Salinity
UR - http://www.scopus.com/inward/record.url?scp=46549088455&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2008.02.026
DO - 10.1016/j.marpolbul.2008.02.026
M3 - Article
C2 - 18374366
AN - SCOPUS:46549088455
SN - 0025-326X
VL - 57
SP - 727
EP - 734
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 6-12
ER -