Characteristics of Nutrients Removal in Tidal Flow Constructed Wetland for Highly Polluted River Water Treatment
CHEN Jingya
WANG Xiaochang
ZHENG Yucong
GE Yuan
LI Shanshan
Abstract：Through one and a half years' experiments,the characteristic of nutrients removal in vertical flow constructed wetland for highly polluted river water treatment have been studied under different operation conditions.The effects of different impact factors were also investigated.The results indicated that tidal flow can improve the nutrients removal,and the annual average removal rate of TN,NH4+-N,TP and PO43--P was 37.6％,51.6％,54.1％ and 41.4％,respectively.Moreover,the nutrients removal efficiencies in the system were quite different throughout the year (P＜0.05),the removal rate was the highest in summer and lowest in winter.A significantly correlation between the removal loadings of TN,NH4+-N,TP and PO43-P with the influent Loading were also found.Additionally,redundancy analysis (RDA) was used to analyze the effects of water environment factors on the nutrients removal.The results showed that SS,carbon source and temperature had positive correlations with TN removal,and the coefficients increased successively,but DO concentration had a negative correlation with total nitrogen removal.However,DO concentration had a better coefficient with NH4+-N removal than ORP.The correlations between pH and SS with TP removal were nearly the same.pH had an extremely positive correlation with PO43--P removal.
Keywords：tidal flow constructed wetlandhighly polluted waterimpacted factorsredundancy analysis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 32-37 )