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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Efficiency of removal of heavy metals from municipal landfill leachate

100%
Koc-Jurczyk J., Jurczyk L.
Journal of Elementology
|
2007
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tom 12
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nr 4
327-334
The aim of this study was to determine the rate of removal of heavy metals depending on a treatment method applied to leachate from a municipal waste landfill. After the biological treatment, concentrations of Cu, Zn and Ni were observed to have increased. Application of the reagent Fenton caused further growth in Cu, Zn, and also Pb concentrations. The highest concentrations of Cu, Zn and Ni were observed when the Fe2+: H2O2 ratio in Fenton was 1:3. The lowest concentrations of these heavy metals were observed at a 1:5 ratio of Fe2+ : H2O2. The concentration lead, for example, was over 30-fold higher than in raw leachate. There was not correlation between the COD values in raw leachate or in biologically or chemically processed leachate and the concentrations of the analysed metals.
2

Treatment of landfill leachate by filtration through reactive filter media

100%
Kietlinska A.
Annals of Warsaw Agricultural University. Land Reclamation
|
2001
|
tom 31
95-99
3
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Application of column tests and electrical resistivity methods for leachate transport monitoring

100%
Wychowaniak D., Zawadzki L., Lech M.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
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2015
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tom 47
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nr 3
Development of the human civilization leads to the pollution of environment. One of the contamination which are a real threat to soil and groundwater are leachates from landfills. In this paper the solute transport through soil was considered. For this purpose, the laboratory column tests of chlorides tracer and leachates transport on two soil samples have been carried out. Furthermore, the electrical resistivity method was applied as auxiliary tool to follow the movements of solute through the soil column what allowed to compare between the results obtained with column test method and electrical resistivity measurements. Breakthrough curves obtained by conductivity and resistivity methods represents similar trends which leads to the conclusion about the suitability of electrical resistivity methods for contamination transport monitoring in soil-water systems.
4

Effectiveness of organics and nitrogen removal from municipal landfill leachate in single- and two-stage SBR system

100%
Klimiuk E., Kulikowska D.
Polish Journal of Environmental Studies
|
2004
|
tom 13
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nr 5
The efficiency of organics and nitrogen removal from municipal landfill leachate in activated sludge operated as single and two-stage SBR were investigated. Leachate from mature landfills are characterized by high N/COD ratio (> 0.5). In single activated sludge system at the hydraulic retention time (HRT) 3d and at methanol dosage 8 mg COD/mg NNO3 complete ammonium nitrogen removal was obtained. Ammonium concentration in the effluent was 0.15 mg NNH4/dm3 and nitrate - 23.5 mg NNO3/dm3 . At the hydraulic retention time 2d, nitrate nitrogen concentration in the effluent decreased to 2.79 mg NNO3/dm3. The concentration of ammonium nitrogen was 0.35 mg NNH4/dm3. However, a sporadically high concentration of ammonium appears. In a two-stage SBR system, HRT 2d was sufficient to achieve complete nitrification. In the effluent ammonium and nitrate concentrations were 0.08 mgNNH4/dm3 and 320 mgNNO3/dm3, respectively. In the anoxic reactor at HRT 1d and methanol dosage 3.6 mg COD/mg NNO3 complete denitrification was obtained. Raw leachate contained specific hazardous organics, among others BTEX (175.8 µg/dm3), chloroorganics (55.7 µg/dm3), chlorobenzenes (0.75 µg/dm3) and PAHs (1.97 µg/dm3). In the effluent from single and two-stage SBR systems chloroorganics and chlorobenzenes were not detected. BTEX and PAH concentrations in the effluent from two-stage system were adequately 2-fold and 2.1-fold lower in comparison to a single one. Besides, the effluent from two-stage SBR systems did not contain benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene and indeno(1,2,3-cd)pyrene.
5

Removal of organics and nitrogen from municipal landfill leachate in two-stage SBR reactors

100%
Kulikowska D., Klimiuk E.
Polish Journal of Environmental Studies
|
2004
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tom 13
|
nr 4
The aim of this study was to investigate efficiency of ammonium nitrogen removal from municipal landfill leachate in activated sludge in two-stage SBR reactors. Treated leachate contains low concentrations of organic substances measured as chemical oxygen demand (COD) - 757 mg O2/dm3 and high concentrations of ammonium - 362 mgNNH4/dm3. Nitrification was studied in two parallel, aerated SBR reactors with two different hydraulic retention times (HRT), 3 and 2 days, respectively. We have found that 2 days HRT was sufficient to achieve complete nitrification. In the effluent ammonium, nitrite and nitrate nitrogen concentrations were 0.08 mgN NH4/dm3, 0.04 mgN NO2/dm3 and 320 mgN NO3 /dm3, respectively. The ammonium nitrogen removal rate was 20.2 mgN NH4 /dm3.h. The effluent from aerobic reactors (HRT 2 days) was fed to the anoxic SBR reactors. An external carbon source (methanol) was added to promote denitrification. In the anoxic reactor, at a methanol dosage 3.6 mg COD/mg N NO3 and HRT of 1 day complete denitrification was achieve with nitrate nitrogen residual concentrations of 0.9 mgNNO3/dm3. The maximum denitrification rate was 48.4 mgN NOx/dm3.h. The highest values of the yield methanol coefficient Y m/N-NOx were determined for dosages 3.6 mg COD/mg NNO3 and 5.4 mg COD/mg NNO3, the lowest for 1.8 mg COD/mg NNO3.
6
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Content available

Wastewater treatment in an integrated laboratory system

84%
Lavrova S., Koumanova B.
Environment, Earth and Ecology
|
2017
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tom 1
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nr 1
Integrated laboratory system consisted of three stages - activated sludge reactor, biofilter and subsurface vertical flow wetland was used to treat two types of wastewaters differed in their generation and pollution. Wastewaters from a pig farm as well as from a landfill site for domestic wastes were used in the experiments. The BOD/COD ratio of the wastewaters from a pig farm and from the landfill leachate was 0.5 and 0.07, respectively. In the first stage of the integrated system was achieved COD removal (48 % for the piggery wastewater for 3 days and 62.3 % for the landfill leachate after 4 days). BOD removal (55.6 %) for the piggery wastewater was achieved in 3 days and 24.9 % - for the landfill leachate after 4 days. The decreasing of organics at aerobic conditions was accompanied with the ammonium ions decreasing - 1.5 times for the piggery wastewater and 4 times for the leachate. In the second stage - biofilter without aeration, an additional organic loading decreasing was achieved. The COD decreased from 820.9 mg/dm3 to 274.3 mg/dm3 for piggery wastewater and for the leachate - from 869.5 mg/dm3 to 423.6 mg/dm3. The BOD values decreased from 384.1 mg/dm3 to 106.8 mg/dm3 for the piggery wastewater and for leachate - from 117.8 mg/dm3 to 57.4 mg/dm3. The ammonium ions were eliminated from both types of wastewaters. In the third stage (subsurface vertical flow wetland) the emission standards for discharge into the sewage collection systems or into the water bodies are met.
7

Removal of landfill leachate toxicity by adsorption on white rot fungi (Pleurotus ostreatus)

84%
Adamcova D., Radziemska M., Zloch J., Vaverkova M. D.
Polish Journal of Natural Sciences
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2017
|
tom 32
|
nr 4
Municipal solid waste landfills are considered to be important sources of groundwater contamination due to the leakage of leachate. Landfill leachate is undoubtedly one of the most challenging wastewaters in terms of treatment. Fungi can be used to treat a landfill leachate. Therefore, the aims of this research were to evaluate the biosorption potential of Pleurotus ostreatus as low-cost adsorbent for the toxicity removal from raw landfill leachate. The objective was also to study the change of leachate toxicity before and after biosorption tests using Sinapis alba L. growth inhibition test. It can be concluded that the growth inhibition (%) of Sinapis alba L. for landfill leachate samples after biosorption tests were in the range of 31.55–96.16%. These samples were strongly toxic, but the toxicity compared to samples before biosorption tests decreased for all samples.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Review of technical methods of landfill sealing and reclamation in the world

84%
Jakimiuk A.
Acta Scientiarum Polonorum. Architectura
|
2022
|
tom 21
|
nr 1
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Leachate characterization and leachate pollution index from landfill dump sites in Warri Metropolis, Nigeria

84%
Godwin A., Oghenekohwiroro E.
International Letters of Natural Sciences
|
2016
|
tom 57
The paucity of standard engineered landfills in Nigeria has given rise to the proliferation of open waste dumpsites. The environment can be impacted by leachates from these dumpsites if not properly managed. This study assessed the characteristics of leachates from three open dumpsites in Warri Metropolis and its contamination potential using leachate pollution index (LPI). The dump sites had low pH with acidic level lower than the recommended limit. The calculated LPI values of the three sites ranges from 6.377 to 7.438. These values are low when compared to open dumpsites in other metropolitan areas of similar climatic conditions. The low value of LPI for leachate indicates relatively lower contaminant potential due to low concentrations of heavy metals, relatively young age of the landfill as well as low population and organic origin of the wastes. The calculated low LPI value does not in any way preclude the continuous monitoring of the dumpsites as the values recorded are just slightly below the threshold level. It is recommended that there should be an upgrade of all open dumpsites to a standard engineered landfill with a robust and effective monitoring put to curtail future release of deleterious materials from these dumpsites.
10

The leachate influence on nutrients and organics removal efficiency, structure and composition of the microfauna in activated sludge treating municipal wastewater

84%
Kulikowska D., Klimiuk E., Drzewicki A.
Archiwum Ochrony Środowiska
|
2005
|
tom 31
|
nr 1
11

Some aspects of the landfill leachate treatment

67%
Suchecka T., Biernacka E., Piatkiewicz W., Gradon L.
Annals of Warsaw Agricultural University. Land Reclamation
|
2005
|
tom 36
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