Landfill leachate treatment by sequential membrane bioreactor and electro-oxidation processes

Zolfaghari, Mehdi; Jardak, Karama; Drogui, Patrick; Brar, Satinder Kaur; Buelna, Gerardo; Dubé, Rino

doi:10.1016/j.jenvman.2016.10.010

Cited by 80 publications

(27 citation statements)

References 20 publications

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“…Zolfaghari et al [173] suggested the combination of a membrane bioreactor (MBR) equipped by ultra-filtration (UF) and an electro-oxidation process (EO) with a boron-doped diamond electrode (BDD) in order to effectively treat highly contaminated, medium-old landfill leachate (BOD/COD = 0.14-0.3). The membrane bioreactor used in this study is a submerged hollow-fiber UF with a nominal pore size of 0.04 µm and a total filtration surface area of 0.047 m 2 .…”

Section: Mbr-uf-eo (Québec Canada)mentioning

confidence: 99%

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Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

et al. 2016

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Abstract:Municipal solid waste final disposal represents an environmental burden worldwide since landfilling, or open dumping, is still the preferred solution for the end of life of solid discarded materials. This study aims to review the technological innovations applied for landfill leachate treatment, taking into consideration the experiences obtained during the past years and the solutions which have been implemented. The review showed that both biological and physiochemical treatments are not able to achieve the requested water quality level, according to the limits established by regulations, whether applied in a single treatment or multiple treatments. In order to respect sustainable release limits to guarantee environmental protection, the construction of depuration systems and combining biological and physiochemical treatment methods is considered of the utmost importance. The review looks at possible joint applications of different treatment techniques reviewed by other studies and considers the state of the art of current research. Combined technical solutions suggested within the 2016 peer-reviewed papers are presented and discussed as a sustainable way to effectively treat landfill leachate, giving particular attention to feasible solutions for developing countries.

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Section: Mbr-uf-eo (Québec Canada)mentioning

confidence: 99%

“…The utilization of a radical scavenger after electro-oxidation or keeping electro-oxidized landfill leachate in a storage tank before introduction into the aeration basin could be a solution to this challenge [173].…”

Section: Mbr-uf-eo (Québec Canada)mentioning

confidence: 99%

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

et al. 2016

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“…The membrane bioreactor is widely used in landfill leachate treatment due to its high performance in the removal of ammonia. The effluent of this system contains compounds resisting to biodegradation (such as humic substances, and a little amount of ammonia and heavy metals) for which advanced oxidation processes (AOPs) are amongst suitable treatment methods [20]. The Advantages of this method are less sludge production, effluent of high quality, high concentration of nitrifying bacteria, and effective performance of nitrification could be mentioned [1].…”

Section: Aerobic Biological Treatmentmentioning

confidence: 99%

“…Partial of 80% removal of nitrogen in aerated Lagoon was done by ammonia evapora- Moving-bed biofilm reactor (MBBR) 800 -2000 20 [24] 7500 -7900 8 [25] Membrane bioreactor (MBR) 1000 -3000 80 -83 [26] 1550 63 [20] 14,000 80 [27] aerobic sequencing batch reactor (ASBR) 4000 87 [21] 3200 30 [28] Aerated lagoons 1740 75 [22] 5518 97 [29] tion [22]. In another study, the use of this method in leachate treatment led to the removal of 97% COD and 92% ammonia nitrogen [29].…”

Section: Aerated Lagoon Process Performancementioning

confidence: 99%

Study of Biological Methods in Landfill Leachate Treatment

Payandeh¹,

Mehrdadi²,

Dadgar³

2017

OJE

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Landfill leachate is mainly the result of precipitation of water into the layers of buried waste, and biochemical reactions of waste that has dangerous substances and pollutants that lead to the contamination of surface and groundwater resources. Therefore, it must be collected and treated properly. The investigation of various biological methods in leachate treatment, their advantages and disadvantages, and their effect on reduction of COD (chemical oxygen demand) are the objectives of this study. Reviewed processes include anaerobic and aerobic sequencing batch reactor, up-flow anaerobic sludge blanket, moving-bed biofilm reactor, membrane bioreactor, and aerated lagoons, lead to reduction of biodegradability pollutants in different circumstances. The present study has indicated that the most and the least reduction of COD has been through aerated lagoon (95%) and moving-bed biofilm reactor (8%), respectively.

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“…Due to the complexation of metals with each other and organic carbon, 24 to 100% of heavy metals are presented in colloidal phase (the size below 10 nm) (Jensen et al, 1999). It is worth mentioning that precipitation of metal by phosphorus inside landfills dramatically decreases their concentration in the leachate (Zolfaghari et al, 2016b). …”

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confidence: 99%

Removal of Pollutants in Different Landfill Leachate Treatment Processes on the Basis of Organic Matter Fractionation

et al. 2018

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A combination of processes was required for the proper treatment of old landfill leachate, as it contained a high concentration of pollutants. Humic substances comprised half of the total organic carbon in the raw leachate. Mobility of di(2-ethylhexyl) phthalate (DEHP) and metals could depend on the fate of these substances. Characterization of carbon in raw leachate and effluent of the membrane bioreactor, biofiltration, electro-oxidation, electro-coagulation, and nanofiltration showed complete removal of suspended solids and colloids. Physical processes could not remove the hydrophilic fraction due to its lower molecular weight. However, high removal of the hydrophilic fraction with a molecular weight <500 Da was expected in the biological process. In comparison with fulvic acid, larger sized humic acid resulted in complete removal by physicochemical processes. Because of DEHP partitioning on dissolved organic matter, especially on humic substances, its removal could be correlated with total organic carbon removal. Metals such as iron, aluminum, magnesium, and lead showed removal efficiency >80% in biological processes. Electro-deposition on the surface of an electrode and precipitation by hydroxide resulted in removal efficiencies >90 and >50% in electro-coagulation and electro-oxidation, respectively. Rejection of metals by nanofiltration was >80% and depended on the size and charge of cation. All in all, a combination of membrane bioreactor and nanofiltration seems to be the optimal process configuration for efficient treatment of old landfill leachate.

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Landfill leachate treatment by sequential membrane bioreactor and electro-oxidation processes

Cited by 80 publications

References 20 publications

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

Study of Biological Methods in Landfill Leachate Treatment

Removal of Pollutants in Different Landfill Leachate Treatment Processes on the Basis of Organic Matter Fractionation

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