Nanofiltration applied to the landfill leachate treatment and preliminary cost estimation

Abstract

The leachate treatment by nanofiltration (NF) process has received much attention over the last two decades. Previous studies focused on the investigation of the technical feasibility of NF. However, there are a limited number of works that examined leachate treatment costs. On the other hand, in a landfill management system, the economic component is an imperative factor for the decisions of all operations. Thereby, this work aimed to investigate the technical feasibility and economic parameters involved in a full-scale NF plant for the treatment of leachate previously treated by the physicochemical process. The average quality of the pre-treated leachate was 2258 ± 230 mg L−1 chemical oxygen demand (COD) and 821 ± 86 mg L−1 humic substances (HS). NF was performed using a bench-scale filtration module with commercial polymeric membranes SR100 and NP030. At the end of each filtration, a cleaning protocol was applied to recover the initial membrane permeability. The concentration of recalcitrant compounds, expressed as HS, was reduced to 84 ± 8 mg L−1 in the permeate, and COD complies with the wastewater discharge standards imposed by local legislation. The capital costs for a full-scale NF was estimated at MUS$ 0.772, and specific total cost, treated leachate per volume unit, has been estimated at US$ 8.26 m−3.

Hazardous Components of Landfill Leachates and Its Bioremediation

“…Coagulation using Ferric chloride followed by filteration and reverse osmosis has been shown to completely remove organic pollutants like Di-(2-ethylhexyl) phthalate (DEHP) and Bisphenol A [26]. Among the latest treatment technologies, leachate treatment using magnetic adsorbents and nanomaterials are of special interests as they have high efficiency in removal of organic acids and heavy metals [27,28]. But the use of these techniques has environmental impacts and further research need to be done with green and environmental friendly processes.…”

Comparison between Aliivibrio fischeri and activated sludge microorganisms in the evaluation of the toxic pollutants of leachates from Brazilian landfills

“…The Seropédica Sanitary Land ll has been in operation since and received an average of 10,000 tonnes per day of municipal solid waste from Seropédica, Itaguaí and Rio de Janeiro cities. The leachate production in this land ll is, on average, 1,000 m 3 /day (Ciclus Ambiental 2018; Almeida et al 2020).…”

Comparison between Aliivibrio fischeri and activated sludge microorganisms in the evaluation of the toxic pollutants of leachates from Brazilian landfills

“…The Seropédica Sanitary Land ll has been in operation since 2011 and received an average of 10,000 tonnes per day of municipal solid waste from Seropédica, Itaguaí and Rio de Janeiro cities. The leachate production in this land ll is, on average, 1,000 m 3 /day (Ciclus Ambiental 2018; Almeida et al 2020).…”