The treatment of leachates from domestic wastes in landfills—I

Robinson, Howard; Maris, P. J.

doi:10.1016/0043-1354(83)90010-6

Cited by 70 publications

(21 citation statements)

References 2 publications

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“…This supports the argument that nitrogen is a long-life pollutant in leachate and that the nitrogen content gradually increases with time, even though organic matter levels decrease. [12][13][14] The ferrous content in the young landfi ll site J was higher than that for the old landfi ll site S, as shown in Fig. 8.…”

Section: Nitrogenmentioning

confidence: 98%

“…9,11 As time passes since landfi lling was completed, the level of organic matter in leachate decreases while the nitrogen content gradually increases. [12][13][14] Seasonal variation at both landfi ll sites in terms of capping conditions This phenomenon may demonstrate that leachate generated from refuse is diluted in the rainy season by infi ltration because there is no fi nal cover. As shown in Fig.…”

Section: Nitrogenmentioning

confidence: 99%

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Comparative study on leachate in closed landfill sites: focusing on seasonal variations

Kim

Lee

2009

J Mater Cycles Waste Manag

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This article is intended to provide background information on leachate management in closed landfi ll sites based on a comparison of two landfi ll sites and the identification of leachate characteristics depending on the fi nal cover and the season. Site S is older and has no fi nal cover, while site J is younger and has fi nal capping. The results of leachate analysis from the two landfi lls show that the biological oxygen demand to chemical oxygen demand ratio decreases below 0.1 to the range 0.05-0.07 for site S, whereas the ratio at site J was in the range 0.08-0.55. The inorganic nitrogen concentration was in the range 169.9-386.1 mg/l with an average of 265.2 mg/l at site S. Ammonia nitrogen accounted for 98.9% of the total nitrogen. The absence of a fi nal cover on closed landfi ll sites may contribute to the stabilization of such landfi lls due to fl ushing. The nitrogen content at landfi ll S dropped in the summer, whereas it decreased in the fall at site J. A higher fl uctuation in the pollutant levels of organic matters and nitrogen at the younger landfi ll site was observed, compared to the older site, even though the younger site had fi nal capping. Therefore, intensive leachate management should be arranged at the early stages after closing for proper treatment. Specifically, nitrogen management of leachate is a critical factor in treatment operations.

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Section: Nitrogenmentioning

confidence: 98%

Section: Nitrogenmentioning

confidence: 99%

Comparative study on leachate in closed landfill sites: focusing on seasonal variations

Kim

Lee

2009

J Mater Cycles Waste Manag

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“…The pollution threat assumes more importance in regions where there are fractures or weak zones just beneath the landfill or surrounding it. The impact of landfill sites on groundwater has been attempted by different workers with different perspectives (Baedecker and Apgar, 1984;Carpenter et al, 1990Carpenter et al, , 1991Klefsted et al, 1975;Laine et al, 1982;Meju, 1993, Robinson andMaris, 1982;Vendrame and Pinho, 1997). Most of the works cited above are focused on assessing the pollution risk to groundwater due to landfill by using invasive as well as non-invasive methods.…”

Section: Introductionmentioning

confidence: 98%

Source Apportionment Of Groundwater Pollution Around Landfill Site In Nagpur, India

Pujari

Deshpande

2005

Environ Monit Assess

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The present work attempts statistical analysis of groundwater quality near a Landfill site in Nagpur, India. The objective of the present work is to figure out the impact of different factors on the quality of groundwater in the study area. Statistical analysis of the data has been attempted by applying Factor Analysis concept. The analysis brings out the effect of five different factors governing the groundwater quality in the study area. Based on the contribution of the different parameters present in the extracted factors, the latter are linked to the geological setting, the leaching from the host rock, leachate of heavy metals from the landfill as well as the bacterial contamination from landfill site and other anthropogenic activities. The analysis brings out the vulnerability of the unconfined aquifer to contamination.

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“…During anaerobic fermentation organic materials are biodegradable and eluted while mineral are only leaching. The ratio of ion concentration of SO 4 2-/Cl is sharply decreased on the result of rapid decrease in the content of sulphates, which in anaerobic conditions are reduced to the sulphide, and then precipitated with metal ions. There is also the phenomenon of growth initially low salinity leachate "young" that as they grow older landfills typically does not exceed 2500 mg Cl/dm 3 .…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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The treatment of leachates from domestic wastes in landfills—I

Cited by 70 publications

References 2 publications

Comparative study on leachate in closed landfill sites: focusing on seasonal variations

Comparative study on leachate in closed landfill sites: focusing on seasonal variations

Source Apportionment Of Groundwater Pollution Around Landfill Site In Nagpur, India

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

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