Multistage treatment technology for leachate from mature urban landfill: Full scale operation performance and challenges

Gomes, Ana I.; Foco, Mario Luiz Rodrigues; Vieira, Eloísa; Cassidy, Joana; Silva, Tânia F.C.V.; Fonseca, António M.; Saraiva, Isabel; Boaventura, Rui A.R.; Vilar, Vítor J.P.

doi:10.1016/j.cej.2018.12.033

Cited by 26 publications

(5 citation statements)

References 36 publications

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“…The photocatalytic reaction of TiO 2 with a circulating leachate transformed the refractory organic matter into biodegradable organic matter, which was looped through the anaerobic landfill reactor E to accelerate the degradation of domestic waste and then recycled at the reactor F to provide a carbon source for denitrifying bacteria. Therefore, the concentration of NO 3 − -N in reactor F was lower than that in reactor D [51,52]. Figure 6c shows that NO 2 − -N concentrations of reactors D and F were 0.01-0.032 and 0.01-0.017 mg/L, respectively.…”

Section: Photocatalyst Stabilitymentioning

confidence: 93%

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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Section: Photocatalyst Stabilitymentioning

confidence: 93%

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

et al. 2021

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“…However, in the case of increased presence of inorganic nitrogen content, the ability of the process to effectively treat landfill leachate is limited. For influent ammonia concentration of 1.3 g/L in mature landfill leachate, the efficiency of a full-scale SBR system was slightly over 70% [121], whereas the COD removal efficiency for intermediate and mature landfill leachate in full-scale SBR systems ranged between 40 and 45% [79,122].…”

Section: Biological Systems and Factors Influencing The Biotreament O...mentioning

confidence: 96%

A Critical Review on the Microbial Ecology of Landfill Leachate Treatment Systems

et al. 2023

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Sanitary landfilling is still considered worldwide as one of the most common methods applied for the management of the municipal solid waste. As a consequence, vast amounts of landfill leachate are generated annually, which are characterized by variability in physicochemical composition, owing to the stabilization process that occurs over the years. However, sustainable management of landfill leachate is a challenging issue, due to diverse chemical composition and high concentration in heavy metals and xenobiotics. Despite the fact that several studies have been reported on the biotreatment of landfill leachate, only in recent years has the microbial composition in such systems have been examined. In the present review, the key role of the microbial ecology involved in depurification and detoxification of landfill leachate in activated sludge and anaerobic systems is interpreted and ecological considerations influencing landfill leachate treatment are stated. Apart from the assessment of landfill toxicity on certain model organisms, this work provides an extensive overview on microbial communities performing key biological processes during landfill leachate treatment, including nitrification-denitrification, anammox and anaerobic digestion. Moreover, microbial aspects affecting nutrient removal efficiency in such biosystems are discussed.

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“…The oxidation reaction in EO process mainly occurs in the anode, and the catalytic activity and stability of the anode are the key factors determining its oxidation capacity and working life [26]. Therefore, most researchers focus on preparing anode materials with high performance, low cost and suitable for practical applications by selecting suitable materials, designing favorable structures and improving preparation processes.…”

Section: Research Status Of Electrodesmentioning

confidence: 99%

Research Progress of Chromophoric Dissolved Organic Matter (CDOM) in Landfill Leachate by Electrochemical Method

Shi,

Zhang,

Wang

2024

FSE

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Over the years, industry, agriculture and other human activities have discharged large amounts of organic pollutants into landfills. Among them, color-resistant dissolved organic pollutants have attracted great attention. In order to achieve the safe discharge of wastewater, a variety of treatment technologies have been used to effectively eliminate CDOM in water. In this paper, the most promising electrochemical oxidation (EO) techniques are reviewed, their basic principles are introduced, and the research progress and application status of electrode materials and electrochemical reactors are introduced. At the same time, the substance composition and detection method of CDOM are discussed. Finally, the performance of EO technology to remove CDOM is summarized. However, we should note that electrode optimization has always been the core of EO technology improvement, and the combination of updated electrode material iteration and treatment process has broad prospects for the wide application of EO technology.

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Multistage treatment technology for leachate from mature urban landfill: Full scale operation performance and challenges

Cited by 26 publications

References 36 publications

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

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

A Critical Review on the Microbial Ecology of Landfill Leachate Treatment Systems

Research Progress of Chromophoric Dissolved Organic Matter (CDOM) in Landfill Leachate by Electrochemical Method

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