Co-treatment of landfill leachate and municipal wastewater using the ZELIAC/zeolite constructed wetland system

Mojiri A 1 , Ziyang L 2 , Tajuddin RM 3 , Farraji H 4 , Alifar N 5

Affiliations 

  • 1 School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Institute of Infrastructure Engineering and Sustainable Management (IIESM), Universiti Teknologi Mara (UiTM), Shah Alam 40450, Selangor Darul Ehsan, Malaysia. Electronic address: amin.mojiri@gmail.com
  • 2 School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
  • 3 Faculty of Civil Engineering, Universiti Teknologi Mara (UiTM), Shah Alam 40450, Selangor Darul Ehsan, Malaysia
  • 4 School of Civil Engineering, Universiti Sains Malaysia (USM), Nibong Tebal 14300, Penang, Malaysia
  • 5 Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor Darul Ehsan, Malaysia
J Environ Manage, 2016 Jan 15;166:124-30.
PMID: 26496842 DOI: 10.1016/j.jenvman.2015.10.020

Abstract

Constructed wetland (CW) is a low-cost alternative technology to treat wastewater. This study was conducted to co-treat landfill leachate and municipal wastewater by using a CW system. Typha domingensis was transplanted to CW, which contains two substrate layers of adsorbents, namely, ZELIAC and zeolite. Response surface methodology and central composite design have been utilized to analyze experimental data. Contact time (h) and leachate-to-wastewater mixing ratio (%; v/v) were considered as independent variables. Colour, COD, ammonia, nickel, and cadmium contents were used as dependent variables. At optimum contact time (50.2 h) and leachate-to-wastewater mixing ratio (20.0%), removal efficiencies of colour, COD, ammonia, nickel, and cadmium contents were 90.3%, 86.7%, 99.2%, 86.0%, and 87.1%, respectively. The accumulation of Ni and Cd in the roots and shoots of T. domingensis was also monitored. Translocation factor (TF) was >1 in several runs; thus, Typha is classified as a hyper-accumulator plant.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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