Removal of non-biodegradable organic matter from landfill leachates by adsorption

Rodríguez, Jesús Daniel Santos; Castrillón, L.; Marañón, E.; Sastre, Herminio; Fernández, Eduardo L. Giménez

doi:10.1016/j.watres.2004.04.032

Cited by 143 publications

(83 citation statements)

References 16 publications

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“…Significant lowering in methane production and COD was observed when the recirculated leachate volume was 30% of the initial waste bed volume [12] . Also, Rodriguez et al [61] reported a 63-70% COD lowering in an anaerobic pilot plant with recirculation. The leachate recycle not only improves the leachate quality, but also shortens the time required for stabilization from several decades to 2-3 years [58] .…”

Section: Landfill Leachate Treatmentsmentioning

confidence: 97%

Review on Landﬁll Leachate Treatments

Аббас¹

2009

American Journal of Applied Sciences

151

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Problem Statement: Sanitary landfilling is the most common way to eliminate solid urban wastes. An important problem associated to landfills is the production of leachates. This study is a review of landfill leachate treatments. Approach: The advantages and disadvantages of the various existing leachate treatments discussed under the items: (i) Leachate channeling (combined treatment with domestic sewage, recycling) (ii) Biological processing (aerobic and anaerobic) (iii) Chemical/physical treatment (flotation, coagulation/flocculation, chemical precipitation, adsorption, ammonium stripping, chemical oxidation, ion exchange and electrochemical treatment) (iv) Membrane filtration (microfiltration, ultrafiltration, nanofiltration and reverse osmosis). Conclusion: The major fraction of old or biologically treated leachate was large recalcitrant organic molecules that are not easy removed during biological treatment. So that, in order to meet strict quality standards for direct discharge of leachate into the surface water, a development of integrated methods of treatment, a combination of biological, chemical, physical and membrane process steps, were required. Today, the use of membrane technologies, more especially Reverse Osmosis (RO), either as a main step in a landfill leachate treatment chain or as single post-treatment step had shown to be an indispensable means of achieving purification.

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Section: Landfill Leachate Treatmentsmentioning

confidence: 97%

Review on Landﬁll Leachate Treatments

Аббас¹

2009

American Journal of Applied Sciences

151

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“…91% COD removal was reported in activated carbon column performance studies on biologically pretreated leachate [10]. Rodriguez et al [11] investigated the removal of non-biodegradable matter from landfill leachate by adsorption using activated carbon and they reported 59% COD removal.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of O-Cresol in Landfill Leachate Using Activated Carbon

Shabiimam¹,

Dikshit²

2012

IJESD

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Abstract-The adsorptive removal of o-cresol from dilute aqueous solutions was carried using commercial activated carbon. Batch mode studies were performed by varying parameters such as pH, adsorbent dosage and time. It was found that adsorption with activated carbon can remove up to 95% of o-cresol from the wastewater within 10 minutes. The optimum process variables of this adsorption of o-cresol were found as pH 8 and adsorption dosage 5 g/L. The adsorption followed Langmuir Isotherm.Index Terms-Activated carbon, adsorption, freundlich and langmuir isotherm, o-Cresol.

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“…They elute organic and mineral compounds resulting from biological and physicochemical changes from the landfills waste. The source of leachate can also be surface water inflow to the storage of waste, and to a small extent, the water contained the waste and derived from the decomposition of organic substances [2,[4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…They are characterized by pollutants that make reach high value of the parameters related to the organic pollution BOD 5 and COD which the ratio reaches high values above 0.7 which shows the ready biodegradability pH of the leachate is also slightly acidic due to the presence of significant amounts of volatile fatty acids [8][9][10]12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Organic Fraction of Pretreated Leachate from Old Landfill after Sonication Exposure

Kwarciak‐Kozłowska

Sławik-Dembiczak

2016

Eng. Prot. Environ.

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Charakterystyka frakcji organicznej odcieków ze starego składowiska po zastosowaniu sonifikacjiCollection of municipal waste in landfills, even properly designed and operated, is an important issue in environmental engineering. These are formed by the infiltration of rainfall through the waste bed and eluting with the organic and inorganic compounds, often toxic nature. So far, over 200, have been identified which are organic substances leachate contamination, as many as 35 belongs to the so-called "priority pollutants". By the decrease in the concentration of organic compounds in the leachate decrease the value of biological and chemical oxygen demand which is dictated by stabilization of landfill as lengthening the time of its life. However, the indicator BOD5 decreases faster as compared to COD therefore BOD5/COD ratio is reduced to as low as 0.06. The leachate produced in mature landfills appears to be the presence of significant amounts of humic acid with very stable structure difficult to breach by bacteria. It was assumed that ultrasonic waves induce change in the structure of organic compounds and contribute to the acceleration of the biodegradability, among other substances in the effluents refractive thereby improve the efficiency of the biological purification processes. For sonification leachate used ultrasonic disintegrator type vibro goal Sonics (40 kHz). The range of vibration amplitude was varied in the range from 25 to 123 µm and exposure time (sonification of leachate) from 60 to 720 seconds. Also the measuring of the size of the energy produced during sonication sonochemical leachate was made. It was found, inter alia, that the sonification process of effluents clearly influenced the formation and release of aliphatic compounds. The -CH2 and -CH3 groups can be released from the humic compounds or aromatic combinations. It was also observed the formation of substantial amounts of compounds with the functional hydroxyl group, which might be derived from alcohols and carboxylic acids. These changes suggested a breach of the chemical structure of organic compounds contained in the leachate, so that, the chemical structure of the formed compounds was more susceptible to biodegradation. The study also determined the effect of ultrasonic field on the evolution of the BOD5 treated leachates and BOD5/COD ratio. The BOD5 sharp increase was observed at the time of sonification of leachate in the range of 60 to 300 s in the whole studied range of amplitudes. This suggests that by the action of the ultrasonic field generated in the effluents of chemical compounds had greater biodegradability.The process confirmed by the change in the ratio of BOD5/COD. The highest value of BOD5 indicator (460 mg/dm 3 ) was at the time of subjecting the leachate impact of ultrasound using amplitude equal to the size of 25 µm and for the time of sonification equal 300 s. In this case the BOD5/COD factor increased to 0.12, and it was about 26% higher as compared to the value of this indicator for leachate no-sonificated (0.08...

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Removal of non-biodegradable organic matter from landfill leachates by adsorption

Cited by 143 publications

References 16 publications

Review on Landﬁll Leachate Treatments

Review on Landﬁll Leachate Treatments

Adsorption of O-Cresol in Landfill Leachate Using Activated Carbon

Characterization of the Organic Fraction of Pretreated Leachate from Old Landfill after Sonication Exposure

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