| 1. |
- Kängsepp, Pille, et al.
(författare)
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Hydraulic performance of a full-scale peat and ash biofilter in treatment of industrial landfill leachate
- 2009
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Ingår i: Waste Management & Research. - : SAGE Publications. - 0734-242X .- 1096-3669. ; 27:5, s. 512-519
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this study was to evaluate the hydraulic performance of a full-scale on-site vertical-flow biofilter, consisting of a mixture of peat and carbon-containing ash, and a 500 m3 equalization pond prior to the filter-system. The treatment plant was constructed to clean up leachate from an industrial mono-landfill that contained shredder residues of end-of-life vehicles and white goods. With the limited storage capacity of the equalization pond, peak loading rates exceeded up to five to six times the designed daily hydraulic load limit of the biofilter system. Such relatively short overloading events did not negatively affect the purification efficiency. To provide the designed annual irrigation rate on the biofilter of 97 m3 day— 1 (or 133 mm day—1), with large seasonal variations in precipitation, a relatively large pond would be needed. Calculations showed that a storage volume of about 23 000 m3 would be sufficient for annual leachate volumes up to about 35 000 m3. A combination of sprinkler and drip irrigation with straw insulation of the latter made it possible to run the plant continuously even when the ambient air temperature was below zero for more than a month at a time. The grain size distribution of the biofilter medium was noticeably changed after 4 years of usage due to the loading of suspended solids from the leachate and decomposition of the peat, causing reduced hydraulic conductivity.
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| 2. |
- Ibrahim, Muhammad Asim, et al.
(författare)
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Characterization of municipal solid waste temporary storage sites : Risks posed to surrounding areas as a consequence of fire incidents
- 2013
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Ingår i: Waste Management. - : Elsevier. - 0956-053X .- 1879-2456. ; 33:11, s. 2296-2306
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Tidskriftsartikel (refereegranskat)abstract
- In this study temporary storage sites of municipal solid waste were characterized based on their potential social, health and environmental impacts as a consequence of spontaneous fires, by employing Boolean as well as weighted-linear-combination approaches in connection with various fuzzy set functions of population density around the storage sites. Sweden was used as the case study and data from 105 storage sites were analysed; of these, 38 were identified to be posing high risk for downwind residing population. Furthermore, during the past 10 years, the fire frequency and the average population residing within a radius of 1, 2, and 3 km were found to be comparatively higher for storage sites owned by private ompanies than for those owned by municipalities. The study provided first-cut information of poorly sited temporary storage sites and can help in formalizing the comprehensive risk analysis in the future.
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| 3. |
- Ibrahim, Muhammad Asim, et al.
(författare)
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Organizing preliminary storage sites of organic material, waste fuels and recyclables and their separating distance from populated areas
- 2014
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Ingår i: Journal of Material Cycles and Waste Management. - : Springer Science and Business Media LLC. - 1438-4957 .- 1611-8227. ; 16:2, s. 270-281
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Tidskriftsartikel (refereegranskat)abstract
- European Union directives have urged member countries to enhance the recycling and separation of waste fractions, and this has increased the number of temporary storage sites of recyclables and waste fuels. Spontaneous fires at temporary storage sites have become common and pose social/health/environmental risks. Storage sites should be sited sufficiently far from populated regions, so that the concentration of released pollutants from open fires falls below the critical air quality index before the plume reach the downwind population. In this study, the open-burn/ open-detonation model developed by the US Environmental Protection Agency was employed, and 540 simulations were performed for nine scenarios of open burning of household waste to estimate suitable sizes of storage heaps and adequate distances between storage sites and populated regions. Furthermore, sensitivity analysis was performed for 1,080 additional simulations to determine the effects of variations in the burn rate, storage dimension and volume of the waste heap on the model output. The resulting chart can be directly employed by waste operators/ environmental agencies to organize storage sites to minimize externalities due to open fires. Furthermore, using ArcGIS software, first-cut information of the total Swedish population facing the risk of hazards due to spontaneous fires was provided.
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| 4. |
- Bengtsson, Lars, et al.
(författare)
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Water balance for landfills of different age
- 1994
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Ingår i: Journal of Hydrology. - 0022-1694 .- 1879-2707. ; 158:3-4, s. 203-217
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Tidskriftsartikel (refereegranskat)abstract
- Water-related processes in landfills are discussed with emphasis on internal processes such as field capacity, moisture variation in time and space, and macropore flow. Runoff production and evaporation from landfills in Sweden of different age are investigated. It is clarified in what ways and for how long a closed municipal landfill differs from an ordinary land area from a hydrological point of view.
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| 5. |
- Berg, Jørn. E, et al.
(författare)
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Hvorfor grave ut "gammel moro"?
- 2009
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Ingår i: Kretsløpet - Tidsskrift for avfall og gjenvinning. ; dec:6, s. 25-27
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Tidskriftsartikel (populärvet., debatt m.m.)
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