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Title: Advanced physico-chemical treatment experiences on young municipal landfill leachates

Abstract

In this study, Membrane Filtration (UF+RO), Struvite (MAP) precipitation and ammonia stripping alternatives were studied on biologically pre-treated Landfill Leachate. The results indicated that the system including the Upflow Anaerobic Sludge Blanket Reactor (UASBR) and Membrane Reactors (UF+RO) has been offered as an appropriate treatment alternative for young landfill leachates. This system provided high removals of COD, colour and conductivity (>98-99%). For ammonia removal, struvite precipitation was applied at the stoichiometric ratio (Mg:NH{sub 4}:PO{sub 4}=1:1:1) to anaerobically pre-treated raw landfill leachate effluent having an influent ammonium concentration of 2240 mg/l. Maximum ammonium nitrogen removal was observed as 85% at pH of 9.2. In ammonia stripping following 2 h of aeration, the removal was 72% at pH=12 while the removals were around 20% at pH=10 and pH=11. When membrane reactor, and struvite precipitation or ammonia stripping was applied to anaerobically pre-treated effluents, the results indicated that each system could be used as an appropriate post-treatment option for young landfill leachates. In economic aspect, ammonia stripping was found as the cheapest alternative with high ammonium removal. However, when both high COD and ammonium removals were to be achieved membrane technology such as UF+RO (SW) could be considered as the most appropriate systemmore » due to the fact that COD removal could be obtained very low by ammonia stripping.« less

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
20875605
Resource Type:
Journal Article
Resource Relation:
Journal Name: Waste Management; Journal Volume: 23; Journal Issue: 5; Conference: World environmental congress on appropriate environmental and solid waste management and technologies for developing countries, Istanbul (Turkey), 8-12 Jul 2002; Other Information: DOI: 10.1016/S0956-053X(03)00061-8; PII: S0956053X03000618; Copyright (c) 2003 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AERATION; AMMONIA; LEACHATES; PH VALUE; PHOSPHATES; PRECIPITATION; REMOVAL; SANITARY LANDFILLS; SLUDGES; STOICHIOMETRY; STRIPPING

Citation Formats

Ozturk, Izzet, Altinbas, Mahmut, Koyuncu, Ismail, Arikan, Osman, and Gomec-Yangin, Cigdem. Advanced physico-chemical treatment experiences on young municipal landfill leachates. United States: N. p., 2003. Web. doi:10.1016/S0956-053X(03)00061-8.
Ozturk, Izzet, Altinbas, Mahmut, Koyuncu, Ismail, Arikan, Osman, & Gomec-Yangin, Cigdem. Advanced physico-chemical treatment experiences on young municipal landfill leachates. United States. doi:10.1016/S0956-053X(03)00061-8.
Ozturk, Izzet, Altinbas, Mahmut, Koyuncu, Ismail, Arikan, Osman, and Gomec-Yangin, Cigdem. 2003. "Advanced physico-chemical treatment experiences on young municipal landfill leachates". United States. doi:10.1016/S0956-053X(03)00061-8.
@article{osti_20875605,
title = {Advanced physico-chemical treatment experiences on young municipal landfill leachates},
author = {Ozturk, Izzet and Altinbas, Mahmut and Koyuncu, Ismail and Arikan, Osman and Gomec-Yangin, Cigdem},
abstractNote = {In this study, Membrane Filtration (UF+RO), Struvite (MAP) precipitation and ammonia stripping alternatives were studied on biologically pre-treated Landfill Leachate. The results indicated that the system including the Upflow Anaerobic Sludge Blanket Reactor (UASBR) and Membrane Reactors (UF+RO) has been offered as an appropriate treatment alternative for young landfill leachates. This system provided high removals of COD, colour and conductivity (>98-99%). For ammonia removal, struvite precipitation was applied at the stoichiometric ratio (Mg:NH{sub 4}:PO{sub 4}=1:1:1) to anaerobically pre-treated raw landfill leachate effluent having an influent ammonium concentration of 2240 mg/l. Maximum ammonium nitrogen removal was observed as 85% at pH of 9.2. In ammonia stripping following 2 h of aeration, the removal was 72% at pH=12 while the removals were around 20% at pH=10 and pH=11. When membrane reactor, and struvite precipitation or ammonia stripping was applied to anaerobically pre-treated effluents, the results indicated that each system could be used as an appropriate post-treatment option for young landfill leachates. In economic aspect, ammonia stripping was found as the cheapest alternative with high ammonium removal. However, when both high COD and ammonium removals were to be achieved membrane technology such as UF+RO (SW) could be considered as the most appropriate system due to the fact that COD removal could be obtained very low by ammonia stripping.},
doi = {10.1016/S0956-053X(03)00061-8},
journal = {Waste Management},
number = 5,
volume = 23,
place = {United States},
year = 2003,
month = 7
}
  • In this study, the adsorption of synthetic landfill leachate onto four kinds of activated carbon has been investigated. From the equilibrium and kinetics experiments, it was observed that coal based PAC presented the highest organic pollutants removal efficiency (54%), followed by coal based GAC (50%), wood based GAC (33%) and wood based PAC (14%). The adsorption equilibrium of PAC and GAC was successfully predicted by Henry-Freundlich adsorption model whilst LDFA + Dual isotherm Kinetics model could describe well the batch adsorption kinetics. The flocculation and flocculation-adsorption experiments were also conducted. The results indicated that flocculation did not perform well onmore » organics removal because of the dominance of low molecular weight organic compounds in synthetic landfill leachate. Consequently, flocculation as pretreatment to adsorption and a combination of flocculation-adsorption could not improve much the organic removal efficiency for the single adsorption process.« less
  • Although restrictions on the landfilling of hazardous industrial wastes have greatly increased, most municipal wastes are still disposed of in soil lined pits that can readily leak contaminated leachates to the subsurface environment. Since municipal waste landfills are numerous and contain many of the same compounds as found in industrial wastes, it is essential to evaluate the risks to human health and the environment from exposure to ground water contaminated with municipal waste landfill leachate. The present study was undertaken to compile chemical constituent and concentration data and, also, to estimate the risk which would be associated with exposure tomore » the organic pollutants found in leachate from industrial and municipal waste landfills. Toxic and cancer causing chemicals were found in the leachates from all 58 landfills for which data were available irrespective of the type of waste which they received. Although different groups of pollutants are found in the different landfills, the concentrations and toxicity are such that the leachate from some municipal waste landfills may cause as great a cancer risk as those from industrial waste landfills. The risk calculations based on suspect carcinogens only indicate that the estimated carcinogenic potency for the leachate from some municipal landfills may be similar to the carcinogenic potency for the leachate from the Love Canal landfill.« less
  • Leachate from bark landfills can be treated biologically by simply using the landfill itself as an anaerobic filter. This is accomplished by recycling the leachate-reintroducing it below the upper surface of the landfill. A requisite for the process is that the pH of the leachate remain approximately neutral. This can be accomplished by adding some lime sludge to the landfill as a pH controlling agent. Full-scale experiments indicate a BOD reduction of 90% without recycling. The noted effect with respect to COD is a reduction of 60%. The method is successfully operated in full-scale application. The investment costs involved aremore » very low in comparison with alternative effluent treatment systems. (Refs. 4).« less
  • Water in Camp Branch, next to U.S. Steel`s abandoned Edgewater Mine tailings pile, has a low pH and contains high sulfate, iron, manganese and zinc concentrations. Part of the water originates from precipitation, surface and groundwater flowing through the Edgewater Mine tailing pile and part from the nonpoint source discharge of leachate from U.S. Steel`s Exum materials storage and disposal facility. U.S. Steel retained CH2M Hill to develop this concept and design a demonstration wetland treatment system. A passive, low-cost, low maintenance system was designed and installed that uses a trench to collect the two nonpoint sources. The system hasmore » an engineered anoxic trench that increases pH by contacting the waste-water with high calcium limestone, precipitates metal hydroxides in a sedimentation pond without chemical addition, and uses both constructed and natural wetlands to remove sulfate, total dissolved solids and heavy metals from the water. Primary results indicate higher than design influent pH and iron levels. Removal of iron and manganese has been limited because of lack of oxygen in the sedimentation and subsequent ponds.« less
  • Highlights: • Young and aged leachate works accounted for 89.1% and 10.9% of 33.35 Gg CO{sub 2} yr{sup −1}. • Fresh leachate owned extremely low ORP and high organic matter content. • Strong CH{sub 4} emissions occurred in the fresh leachate ponds, but small in the aged. • N{sub 2}O emissions became dominant in the treatment units of both systems. • 8.45–11.9% of nitrogen was removed as the form of N{sub 2}O under steady-state. - Abstract: With limited assessment, leachate treatment of a specified landfill is considered to be a significant source of greenhouse gas (GHG) emissions. In our study,more » the cumulative GHG emitted from the storage ponds and process configurations that manage fresh or aged landfill leachate were investigated. Our results showed that strong CH{sub 4} emissions were observed from the fresh leachate storage pond, with the fluxes values (2219–26,489 mg C m{sup −2} h{sup −1}) extremely higher than those of N{sub 2}O (0.028–0.41 mg N m{sup −2} h{sup −1}). In contrast, the emission values for both CH{sub 4} and N{sub 2}O were low for the aged leachate tank. N{sub 2}O emissions became dominant once the leachate entered the treatment plants of both systems, accounting for 8–12% of the removal of N-species gases. Per capita, the N{sub 2}O emission based on both leachate treatment systems was estimated to be 7.99 g N{sub 2}O–N capita{sup −1} yr{sup −1}. An increase of 80% in N{sub 2}O emissions was observed when the bioreactor pH decreased by approximately 1 pH unit. The vast majority of carbon was removed in the form of CO{sub 2}, with a small portion as CH{sub 4} (<0.3%) during both treatment processes. The cumulative GHG emissions for fresh leachate storage ponds, fresh leachate treatment system and aged leachate treatment system were 19.10, 10.62 and 3.63 Gg CO{sub 2} eq yr{sup −1}, respectively, for a total that could be transformed to 9.09 kg CO{sub 2} eq capita{sup −1} yr{sup −1}.« less