Removals of organic micropollutants from municipal solid waste landfill leachate using horizontal subsurface flow constructed wetland with reactive media

Name: Chayanid Witthayaphirom

LCSH: Kasetsart University -- Dissertations. D.Eng. (Environmental Engineering) 2020

Classification :.LCCS: TD795.7

LCSH: Kasetsart University. -- Department of Environmental Engineering -- Dissertations

LCSH: Sanitary landfills -- Leaching

LCSH: Leachate

LCSH: Refuse and refuse disposal)

Abstract: The removal of organic micro-pollutants (OMPs) from landfill leachate in constructed wetland (CW) media having different material mixtures of sand (S), clay (C) and iron powder (Fe) was investigated in laboratory and field-scale studies. Firstly, appropriate material mixture in reactive media was determined in column experiment. It was found that SCFe media consisting of 60:30:10 % (w/w) with cattail was optimal for the removals of 2,6-DTBP, BHT, DEP, DBP and DEHP yielding 67.5-75.4% of their removals during long term operation of 373 days. Adsorption and biodegradation were confirmed as predominant mechanisms for their removal in CW media but their contribution in total removal varied depending on chemical properties of OMPs. Subsequently, long term operations of horizontal subsurface flow constructed wetland (HSSF) with S and SCFe media with cattail as vegetation in removing OMPs from landfill leachate were investigated over 3 years in field-scale study. The removal of OMPs in SCFe media was found better than S media by 8-17%. Higher OMPs removal were observed in the summer season during the 1st year. Nevertheless, the seasonal effect was less pronounced when the media system became mature after long term operation. The biodegradation was mainly responsible for the removals of DEP, DBP, 2,6-DTBP and BHT whereas DEHP was initially removed through adsorption and formation of iron-organic complex and then subsequently biodegraded during long-term operation as OMP degrading microbial consortium attached to the reactive media was enriched.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Chart Chiemchaisri

Role: Thesis Advisor

Name: Wilai Chiemchaisri

Role: Thesis CO-Advisor

Created: 2020

Modified: 2025-06-30

Issued: 2025-06-30

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2563/chayanid-wit-all.pdf

CallNumber: TD795.7 .C421

eng

DegreeName: Doctor of Engineering

Level: Doctoral Degraee

Descipline: Environmental Engineering

Grantor: Kasetsart University

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