Evaluation of coagulation–flocculation and nanofiltration processes in landfill leachate treatment

Almeida, Ronei de; Costa, Alyne Moraes; Oroski, Fábio de Almeida; Campos, Juacyara Carbonelli

doi:10.1080/10934529.2019.1631093

Cited by 22 publications

(14 citation statements)

References 31 publications

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“…In our study, additional removals of Cl − (>45%) and conductivity (>35%) were obtained. A similar result was achieved by De Almeida et al (2019) in the membrane NF process with model SB90 (molecular weight cut-off range, 500-700 Da). Chaudhari and Murthy (2010) observed 62 and 65% rejection of Cl − from two leachate samples with NF.…”

Section: Nf Processsupporting

confidence: 77%

“…Similarly, organic fouling was the key factor for the decline in permeate stream. In our previous research, we obtained 89% TOC removal and 30% permeate flux decline (De Almeida et al, 2019).…”

Section: Nf Processmentioning

confidence: 89%

“…Therefore, a further treatment process is needed. In this respect, NF represents a sound technology to complement leachate treatment because it has the advantages of providing a high permeate flux at low operating pressure and maintaining a high organic matter rejection rate (Chaudhari and Murthy, 2010;De Almeida et al, 2019).…”

Section: Effluent Characterizationmentioning

confidence: 99%

“…Landfill leachate treatments are expensive, multi-processed, and different from each other due to the complex composition, high loading, and seasonal variation (Liu et al, 2015). Several technologies and treatment schemes are available for the treatment of landfill leachate (De Almeida et al, 2019;Di Maria et al, 2018;Renou et al, 2008;Talalaj et al, 2019): (a) co-treatment of sewage and leachate on the site or transfer to the central wastewater treatment plant; (b) recirculation into the bioreactor landfill body; (c) physicochemical treatment (coagulation-flocculation, precipitation, chemical oxidation, activated carbon adsorption); (d) biological processes (anaerobic treatment, aerated lagoons, activated sludge plants, membrane bioreactor, biofilms in rotating biologic contractors, and trickling filters); and (e) membrane processes (main nanofiltration (NF) and reverse osmosis (RO)). Despite this, to provide a treated effluent that can be discharged into natural water streams or reused, one single treatment technology is not available and a combination of treatment technologies is essential.…”

Section: Introductionmentioning

confidence: 99%

“…Fernandes et al (2017) stressed that most of the conventional biological and physicochemical technologies implemented at the landfill facilities are not capable to treat leachates efficiently and are currently being replaced by/or complemented with membrane technologies. Also, Brazilian researchers have highlighted the need to use efficient and economically viable technologies for the treatment of leachate in Brazilian landfills (Amaral et al, 2015;Costa et al, 2019;De Almeida et al, 2019). However, to the best of our knowledge, the most advanced leachate treatment technologies are not feasible in most of the municipalities due to, for instance, the high cost of implementation and maintenance, and the volumes of leachate to be treated.…”

Section: Introductionmentioning

confidence: 99%

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Nanofiltration applied to the landfill leachate treatment and preliminary cost estimation

et al. 2020

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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.

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Section: Nf Processsupporting

confidence: 77%

Section: Nf Processmentioning

confidence: 89%

Section: Effluent Characterizationmentioning

confidence: 99%