Treatment of landfill leachate by combined electro-Fenton oxidation and sequencing batch reactor method

Lin, Sheng H.; Chang, Chih Cheng

doi:10.1016/s0043-1354(00)00185-8

Cited by 228 publications

(105 citation statements)

References 21 publications

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“…Therefore, AOPs appear not to be a suitable pre-treatment option for biological treatment. Secondly, hydroxyl radical-based AOPs difficultly remove ammonia nitrogen, the other major leachate pollutant, because hydroxyl radicals have a very slow reaction rate with ammonia [50].…”

Section: Treatment Issuesmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

2015

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Advanced oxidation processes (AOPs) were first proposed in the 1980s for drinking water treatment and later were widely studied for treatment of different wastewaters. During the AOP treatment of wastewater, hydroxyl radicals (OH·) or sulfate radicals (SO 4 ·− ) are generated in sufficient quantity to remove refractory organic matters, traceable organic contaminants, or certain inorganic pollutants, or to increase wastewater biodegradability as a pre-treatment prior to an ensuing biological treatment. In this paper, we review the fundamental mechanisms of radical generation in different AOPs and select landfill leachate and biologically treated municipal wastewater as model wastewaters to discuss wastewater treatment with different AOPs. Generally, the treatment efficiencies rely heavily upon the selected AOP type, physical and chemical properties of target pollutants, and operating conditions. It would be noted that other mechanisms, besides hydroxyl radical or sulfate radical-based oxidation, may occur during the AOP treatment and contribute to the reduction of target pollutants. Particularly, we summarize recent advances in the AOP treatment of landfill leachate, as well as advanced oxidation of effluent organic matters (EfOM) in biologically treated secondary effluent (BTSE) for water reuse.

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Section: Treatment Issuesmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

2015

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“…Ainsi, le fer et ses alliages sont largement utilisés comme anodes sacrificielles pour la génération électrochimique des ions ferreux (LIN et CHANG, 2000;BRILLAS et CASADO, 2002;ATMACA, 2009). Différents types de cathodes tels que l'acier inoxydable, le titane, le graphite, le feutre de carbone, le carbone PTFE (polytétrafluoroéthylène), etc.…”

Section: Procédé D'électro-fenton (Ef)unclassified

Utilisation des procédés électrochimiques et leurs combinaisons avec les procédés biologiques pour le traitement des lixiviats de sites d’enfouissement sanitaires - revue de littérature

Dia

Drogui

Dubé

et al. 2016

rseau

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Les lixiviats des sites d’enfouissement sanitaires contiennent divers types de composés organiques et inorganiques susceptibles de polluer les milieux aquatiques s’ils ne sont pas convenablement traités. Depuis quelques années, on note une utilisation croissante des techniques électrochimiques, avec des résultats satisfaisants, pour le traitement des lixiviats. Parmi les avantages liés à l’utilisation de ces procédés, on peut citer : une faible emprise au sol, un temps de traitement court, une utilisation limitée, voire inexistante, de réactifs chimiques et une facilité d’automatisation. La capacité à traiter les composés organiques bioréfractaires et à augmenter la biodégradabilité de l’effluent constitue un atout majeur lors du traitement de certains types de lixiviats. Dans cette revue de littérature, un accent particulier est porté sur les trois procédés électrochimiques les plus utilisés pour le traitement des lixiviats, à savoir : l’électro-oxydation (EO), l’électro-Fenton (EF) et l’électrocoagulation (EC). Pour chacun des procédés, les différents paramètres opératoires qui influencent l’efficacité du traitement sont élucidés. D’une façon globale, les procédés électrochimiques sont influencés entre autres par l’intensité du courant appliqué, le type d’électrode utilisé, la distance interélectrodes, le temps de traitement, le pH et la conductivité du milieu. Le couplage des procédés électrochimiques et biologiques pour le traitement des lixiviats a été investigué. L’intégration de ces deux procédés permet d’augmenter les performances épuratoires tout en réduisant les coûts et les temps de traitement. Toutefois, des études approfondies sont nécessaires afin d’optimiser ces couplages et d’éclaircir l’influence du traitement biologique sur le traitement électrochimique et vice-versa.

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“…Fenton process can significantly remove recalcitrant and toxic organic compounds, and increase the biodegradability of organic compounds [49,50,52,56]. There are four advantages of the Fenton's reagent: (i) both iron and hydrogen peroxide are relative cheap and nontoxic; (ii) there is no mass transfer limitation due to its homogeneous catalytic nature; (iii) there is no form of energy involved as catalyst; (iv) the process is technologically simple.…”

Section: Fenton Oxidationmentioning

confidence: 99%

“…It should be noted that the treatment efficiency of Fenton process is better than ozone-based process and electrochemical oxidation. In term of biodegradability improvement, BOD/COD ratios are 0.29-0.88 [49,50,52,56] and 0.1-0.5 (Table 3) were reported after oxidation by Fenton process and ozone-based oxidation, respectively.…”

Section: Comparison Of Various Aop's Performancementioning

confidence: 99%

Removal of Organic Matter from Landfill Leachate by Advanced Oxidation Processes: A Review

Zhou

Hua

2010

International Journal of Chemical Engineering

126

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In most countries, sanitary landfill is nowadays the most common way to eliminate municipal solid wastes (MSWs). However, sanitary landfill generates large quantity of heavily polluted leachate, which can induce ecological risk and potential hazards towards public health and ecosystems. The application of advanced oxidation processes (AOPs) including ozone-based oxidation, Fenton oxidation, electrochemical oxidation, and other AOPs to treatment of landfill leachate was reviewed. The treatment efficiency in term of chemical oxygen demand (COD) of various AOPs was presented. Advantages and drawbacks of various AOPs were discussed. Among the AOPs reviewed, Fenton process should be the best choice, not only because it can achieve about 49∼89% of COD removal with COD ranging from 837 to 8894 mg/L, but also because the process is cost-effective and simple in technological aspect, there is no mass transfer limitation (homogeneous nature) and both iron and hydrogen peroxide are nontoxic.

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Treatment of landfill leachate by combined electro-Fenton oxidation and sequencing batch reactor method

Cited by 228 publications

References 21 publications

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

Utilisation des procédés électrochimiques et leurs combinaisons avec les procédés biologiques pour le traitement des lixiviats de sites d’enfouissement sanitaires - revue de littérature

Removal of Organic Matter from Landfill Leachate by Advanced Oxidation Processes: A Review

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