Abstract

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 m³ d⁻¹ 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 (NH₄⁺-N) were achieved in bench experiments, respectively. It was possible to reach the local discharge standard for COD (200 mg L⁻¹), but it was not possible to reach the Brazilian disposal requirement for NH₄⁺-N (20 mg L⁻¹). The total cost of the integrated MF + NF + zeolite system was estimated at 19.89 US$m⁻³. 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 NH₄⁺-N depuration is needed to meet discharge requirements.

摘要

这项工作通过由微滤 (MF)、纳滤 (NF) 和沸石应用组成的综合方案来去除碳和氮，探索垃圾渗滤液处理的技术经济方面。在小型实验中，研究了 MF 和 NF，并进行了沸石批量试验以确定最佳条件。^{根据从实验测试和文献调查中获得的数据，对 200 m 3} d ^-1全尺寸处理设施进行了初步经济分析。化学需氧量 (COD)、254 nm 吸光度和铵态氮 (NH ₄ ⁺-N) 分别在台架实验中实现。^{COD（200 mg L -1} ）可以达到当地排放标准，但无法达到巴西对NH ₄ ⁺ -N（20 mg L ^-1）的处置要求。MF + NF + 沸石系统的总成本估计为 19.89 美元^-3。在这项研究中，沸石应用的成本约占综合方案总成本的 70%。膜工艺集成是一种以低运营成本去除有机化合物的适当策略；然而，需要进一步净化NH ₄ ⁺ -N以满足排放要求。