Electrochemical treatment of concentrate from reverse osmosis of sanitary landfill leachate

Labiadh, Lazhar; Fernandes, Annabel; Ciríaco, Lurdes; Pacheco, Maria José; Gadri, Abdellatif; Ammar, Salah; Lopes, Ana

doi:10.1016/j.jenvman.2016.06.069

Cited by 82 publications

(34 citation statements)

References 37 publications

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“…The leachate samples with a mixture of algae and bacteria have gone a series of dilution from 10%, 30%, 50%, 80% and 100% (v/v) leachate concentration in five flasks each contained one (1) liter distilled water, respectively [3]. Three replicates have been carried out in the experiment.…”

Section: Experiments Setupmentioning

confidence: 99%

“…The composition of the leachate varies depending on a few factors such as hydrogeology, amount of rainfall, age of the landfill, waste composition and degradation stage of the waste [2]. There are lots of technologies that have been used for leachate treatment such as physical or chemical treatment, biological treatment, and emerging technologies such as reverse osmosis (RO) and evaporation [3]. Biological leachate treatment is a proven technology for organics and ammonia removal in young and matured leachate.…”

Section: Introductionmentioning

confidence: 99%

“…For example, RO is considered as an expensive technology and not suitable to treat wastewater with high total suspended solids (TSS) such as leachate. TSS will cause blockage in RO and make it less efficient [3].…”

Section: Introductionmentioning

confidence: 99%

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Ammonia-Nitrogen and Phosphate Removal in Leachate using Algae and Bacteria Mixture

Kasmuri*,

Misni

2019

IJRTE

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Leachate is a liquid that has been produced by the waste especially organic waste. In an engineered sanitary landfill, biological treatment is a common practice to reduce the leachate contaminants. The effluent from treated leachate needs to comply with the standard set by the Department of Environment (DOE), Malaysia before it is being released into the river. The leachate contains a high number of contaminants such as ammonia-nitrogen, phosphorus, heavy metal, biochemical oxygen demand (BOD), chemical oxygen demand (COD) and suspended solids. This study focused on the possibility of treating leachate by using algae and bacteria in biological treatment in removing ammonia-nitrogen and phosphate in leachate obtained from Air Hitam Sanitary Landfill, Puchong. Initially, the characteristics of the leachate sample with in-situ and laboratory tests were analyzed to quantify the contaminants in the leachate. In this research, the concentration of leachate samples together with algae and bacteria was diluted in one (1) liter of distilled water varied between 10%, 30%, 50%, 80% and 100% (v/v) in each flask. Then, all the samples were aerated to ensure that the algae and bacteria were at the optimum condition to treat the contaminants in the leachate for all the respective flasks. The results of ammonia-nitrogen, phosphate, nitrite-nitrogen, and nitrate-nitrogen were taken for every 3 days for 15 days to determine the percentage of the removal due to the algae and bacteria uptake in the leachate for all the samples. After 15 days, the percentage of removal of the contaminants were analyzed using factorial design. It showed that 50% (v/v) of leachate concentration in the diluted flask exhibits the highest removal percentage of ammonia-nitrogen with 96.95% ammonia-nitrogen being removed from the leachate. For phosphorus, 10% (v/v) diluted leachate concentration marked highest which is 94.92% has been removed from the leachate. Finally, the regression equation was established to predict the rate of ammonia-nitrogen removal.

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Section: Experiments Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ammonia-Nitrogen and Phosphate Removal in Leachate using Algae and Bacteria Mixture

Kasmuri*,

Misni

2019

IJRTE

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“…Leachate contains a large number of harmful organic matters, heavy metals, and inorganic salts [13]. There are many means to treat leachate, such as membrane bioreactors [14] adsorption [15], flocculation [16,17], and electrochemical methods [18]. Advanced oxidation techniques are a good way to treat leachate, such as fenton, ozone, or other improved methods [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Remediation Technology and Typical Case Analysis of Informal Landfills in Rainy Areas of Southern China

Yin

Yan

Guo

et al. 2020

IJERPH

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A typical informal landfill in a rainy area of southern China was taken as an example in this study. The comprehensive control ideas and processes of the informal landfill site were systematically reviewed. The basic situation for the early stage of the government survey and investigation was provided, including a waste stock survey, water volume measurement, and a waste source survey. The main contents and key factors of a comprehensive investigation of the environmental quality status were briefly summarized. The water quality in the landfill, groundwater quality inside and outside of the site, and heavy metals in the bottom sediment were all determined. A low-cost practical landfill technology was explored to reduce the Chemical Oxygen Demand CODCr concentration of polyaluminum ferric chloride (PAFC), and NH4+-N was removed by calcium hypochlorite. Soil backfill was replaced, such that the informal landfill site was immobilized, which was perfectly suitable for this southern rainy area. This study proposes rules for a comprehensive improvement scheme for a landfill, and provides a reliable theoretical basis and practical experience for the treatment of similar informal landfills.

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“…The large volume of concentrate needs to be properly treated. Labiadh et al [8] used anodic oxidation combined with electro-Fenton processes to treat the concentrate and found, under the most favorable electro-Fenton conditions, removal rates of 60 % and 22 % for COD and TN, respectively. Xu et al [9] also used a Fenton process for leachate treatment membrane concentrates and reached 68.9 % TOC reduction.…”

Section: Introductionmentioning

confidence: 99%

Landfill leachate treatment by batch supercritical water oxidation

Cardona¹,

Buitrago²,

Acosta

2017

Cien.Ing.Neogranadina

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were measured in the reactor effluent samples and the combined effect of the studied factors was analyzed by means of the Analysis of Variance (ANOVA). Optimal operation conditions for TOC destruction were 400°C, 30 min and 100 % OE, being 500°C, 30 min and 100 % OE for TN destruction. Contrary to what has been reported in similar studies, the results suggest that it is possible to accomplish the simultaneous TOC and TN destruction in leachate wastewater by SCWO treatment at 400°C, 100 % OE and residence times longer than 30 min and without using a catalyst, either in batch or in a continuous process, as long as both the oxidant and the wastewater are mixed and heated together at the reaction temperature.Keywords: Landfill leachate, SCWO, TOC destruction, Total Nitrogen destruction. rEsumENEl tratamiento de lixiviados por medio de diferentes procesos fisicoquímicos y biológicos ha sido ampliamente estudiado. Sin embargo, ningún proceso logra las eficiencias de destrucción requeridas en cuanto a materia orgánica y nitrógeno, razón por la cual el tratamiento se realiza por medio de tecnologías combinadas. La oxidación en agua supercrítica o SCWO, proceso que se lleva a cabo a temperaturas y presiones superiores a las del punto crítico del agua en presencia de una fuente de oxígeno, se ha aplicado exitosamente al tratamiento de distintos tipos de aguas residuales de forma eficiente. Por lo tanto, este trabajo presenta un estudio experimental de la oxidación en agua supercrítica de lixiviados de relleno sanitario en un reactor batch, en el rango de temperatura de 400-500°C, tiempos de reacción de 15 a 30 minutos y excesos de oxígeno (OE) de 100 % a 300 %. Se midieron las eficiencias de destrucción de carbono orgánico total (COT) y nitrógeno total (NT), y se determinó el efecto combinado de los factores estudiados por medio del Análisis de Varianza (ANOVA). Las condiciones de operación óptimas para la destrucción de COT fueron 400°C, 30 min y 100 % OE, y 500°C, 30 min y 100 % OE para el NT. A diferencia de lo reportado en estudios similares, los resultados sugieren que es posible llevar a cabo la destrucción simultánea del COT y el NT en los lixiviados por medio de SCWO a 400°C, 100 % OE y tiempos de residencia de más de 30 min sin usar un catalizador, ya sea en un proceso batch o continuo, siempre y cuando tanto el oxidante como el agua residual se mezclen y se calienten juntos a la temperatura de reacción.Palabras clave: Lixiviados, SCWO, destrucción de COT, destrucción de nitrógeno total.

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Electrochemical treatment of concentrate from reverse osmosis of sanitary landfill leachate

Cited by 82 publications

References 37 publications

Ammonia-Nitrogen and Phosphate Removal in Leachate using Algae and Bacteria Mixture

Ammonia-Nitrogen and Phosphate Removal in Leachate using Algae and Bacteria Mixture

Remediation Technology and Typical Case Analysis of Informal Landfills in Rainy Areas of Southern China

Landfill leachate treatment by batch supercritical water oxidation

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