This work explores the techno-economic aspects of landfill leachate treatment by an integrated scheme composed of microfiltration (MF), nanofiltration (NF), and zeolite application for carbon and nitrogen removal. In bench-scale experiments, MF and NF were investigated, and zeolite batch tests were carried out to determine optimum conditions. A preliminary economic analysis is presented for a 200 m d full-scale treatment facility based on the data obtained from experimental tests and literature surveys. The maximum removals of 92%, 94%, and 79% for chemical oxygen demand (COD), absorbance at 254 nm, and ammonium nitrogen (NH-N) were achieved in bench experiments, respectively. It was possible to reach the local discharge standard for COD (200 mg L), but it was not possible to reach the Brazilian disposal requirement for NH-N (20 mg L). The total cost of the integrated MF + NF + zeolite system was estimated at 19.89 US$m. In this study, the costs of the zeolite application account for around 70% of the total costs of the integrated scheme. Membrane process integration was an adequate strategy for removing organic compounds at low operating costs; However, further NH-N depuration is needed to meet discharge requirements.
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