Treatment of sanitary landfill leachate by the combination of photo-Fenton and biological processes

Colombo, Andréia; Módenes, Aparecido Nivaldo; Trigueros, Daniela Estelita Góes; Costa, Sabryna Isabelly Giordani da; Borba, Fernando Henrique; Espinoza‐Quiñones, Fernando Rodolfo

doi:10.1016/j.jclepro.2018.12.310

Cited by 48 publications

(14 citation statements)

References 29 publications

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“…In particular, Singa et al (2018) [21] addressed a 68% COD removal in 90 min of treatment using a 16 W high-pressure mercury-vapor immersion lamp to perform the photo-Fenton degradation of LL. Colombo et al (2019) [7] achieved an 89% COD removal in a similar photo-Fenton treatment of a sanitary LL, and the reported treatment efficiency increased up to the 98% removal of the COD when the oxidation process was combined with a posterior biological treatment. Furthermore, Gomes et al (2018) [23] reported an 80% COD removal when a sunlight CPC was used to assist the Fenton reaction of urban mature leachate.…”

Section: Introductionmentioning

confidence: 87%

“…Consequently, mature LL cannot efficiently be treated by biological processes; thus, alternative technologies must be considered for its successful depuration. Advanced oxidation processes (AOPs) are the most popular methods that have been addressed to degrade bio-recalcitrant matter because they are able to enhance the biodegradability of LL [7][8][9][10][11][12][13][14]. One of the most common AOPs used for this purpose is the Fenton reaction [15][16][17], which consists in the generation of hydroxyl radicals, which hold great oxidative power, to degrade organic matter through the reaction between hydrogen peroxide and Fe 2+ , as it is shown in Equation ( 1): 3+ (1)…”

Section: Introductionmentioning

confidence: 99%

“…Different sources of UV radiation have already been assessed in their application to perform the photo-Fenton reaction, namely, high-pressure mercury-vapor immersion lamps [7,21], sunlight concentrated in compound parabolic collectors (CPC) [23,24], unconcentrated sunlight in thin film reactors [25], and light-emitting diodes (LEDs) [26]. In particular, Singa et al (2018) [21] addressed a 68% COD removal in 90 min of treatment using a 16 W high-pressure mercury-vapor immersion lamp to perform the photo-Fenton degradation of LL.…”

Section: Introductionmentioning

confidence: 99%

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UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

et al. 2021

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The objective of this trial was to assess the application of UVA-LED technology as an alternative source of irradiation for photo-Fenton processes, aiming to reduce treatment costs and provide a feasible treatment for landfill leachate. An optimized combination of coagulation with ferric chloride followed by photo-Fenton treatment of landfill leachate was optimized. Three different radiation sources were tested, namely, two conventional high-pressure mercury-vapor immersion lamps (100 W and 450 W) and a custom-designed 8 W 365 nm UVA-LED lamp. The proposed treatment combination resulted in very efficient degradation of landfill leachate (COD removal = 90%). The coagulation pre-treatment removed about 70% of the COD and provided the necessary amount of iron for the subsequent photo-Fenton treatment, and it further favored this process by acidifying the solution to an optimum initial pH of 2.8. The 90% removal of color improved the penetration of radiation into the medium and by extension improved treatment efficiency. The faster the Fenton reactions were, as determined by the stoichiometric optimum set-up reaction condition of [H2O2]0/COD0 = 2.125, the better were the treatment results in terms of COD removal and biodegradability enhancement because the chances to scavenge oxidant agents were limited. The 100 W lamp was the least efficient one in terms of final effluent quality and operational cost figures. UVA-LED technology, assessed as the application of an 8 W 365 nm lamp, provided competitive results in terms of COD removal, biodegradability enhancement, and operational costs (35–55%) when compared to the performance of the 450 W conventional lamp.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

et al. 2021

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“…Processes 2021, 9, x FOR PEER REVIEW 10 of 14 sible to treat an effluent with a high organic load, meeting the restrictive standards of release in the recipient water bodies [57].…”

Section: Treatment Of Leachate By Aging Reactor Combined With Photocatalysismentioning

confidence: 99%

Degradation of Landfill Leachate Using UV-TiO2 Photocatalysis Combination with Aged Waste Reactors

et al. 2021

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This study explored the performance of TiO2 nanoparticles in combination with aged waste reactors to treat landfill leachate. The optimum conditions for synthesis of TiO2 were determined by a series of characterizations and removal rates of methyl orange. The effect of the ultraviolet irradiation time, amount of the catalyst, and pH on the removal efficiency for the chemical oxygen demand (COD) and color in the leachate was explored to determine the optimal process conditions, which were 500 min, 4 g/L and 8.88, respectively. The removal rates for COD and chroma under three optimal conditions were obtained by the single factor control method: 89% and 70%; 95.56% and 70%; and 85% and 87.5%, respectively. Under optimal process conditions, the overall average removal rates for ammonium nitrogen (NH4+–N) and COD in the leachate for the combination of TiO2 nanoparticles and an aged waste reactor were 98.8% and 32.5%, respectively, and the nitrate (NO3−–N) and nitrite nitrogen (NO2–N) concentrations were maintained at 7–9 and 0.01–0.017 mg/L, respectively. TiO2 nanoparticles before and after the photocatalytic reaction were characterized by emission scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and Fourier transform infrared spectrometry. In addition, TiO2 nanoparticles have excellent recyclability, showing the potential of the photocatalytic/biological combined treatment of landfill leachate. This simulation of photocatalysis-landfilling could be a baseline study for the implementation of technology at the pilot scale.

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“…[20][21][22] Traditionally, municipal solid waste leachate may be treated through physical, chemical and/or biological methods. 23,24 Aromatic organic compounds in municipal solid waste leachate are extremely difficult to be biodegraded, resulting in poor destruction efficiency of pollutants by conventional biological methods. High ammonium nitrogen (NH 4…”

Section: Introductionmentioning

confidence: 99%

Dechlorination of fly ash by hydrolysate of municipal solid waste leachate

Gao

Wang

et al. 2020

RSC Adv.

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Treatment of sanitary landfill leachate by the combination of photo-Fenton and biological processes

Cited by 48 publications

References 29 publications

UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

Degradation of Landfill Leachate Using UV-TiO2 Photocatalysis Combination with Aged Waste Reactors

Dechlorination of fly ash by hydrolysate of municipal solid waste leachate

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