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

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:166

Article

Mojiri, Amin^1,2  Lou Ziyang¹  Tajuddin, Ramlah Mohd³  Farraji, Hossein⁴  Alifar, Nafiseh⁵ 

[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200030, Peoples R China

[2] Univ Teknol Mara UiTM, IIESM, Shah Alam 40450, Selangor Darul, Malaysia

[3] Univ Teknol Mara UiTM, Fac Civil Engn, Shah Alam 40450, Selangor Darul, Malaysia

[4] Univ Sains Malaysia, Sch Civil Engn, Nibong Tebal 14300, Penang, Malaysia

[5] Univ Putra Malaysia, Fac Agr, Dept Land Management, Serdang 43400, Selangor Darul, Malaysia

关键词: Co-treatment;    Landfill leachate;    RSM;    Wetland;    ZELIAC;    Zeolite;   

DOI  :  10.1016/j.jenvman.2015.10.020

来源: Elsevier

【 摘 要 】

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. (C) 2015 Elsevier Ltd. All rights reserved.

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