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Successive closing down of filled-up large municipal landfill sites or those which no longer fulfil the legal regulations, compel local governments and enterprises dealing with waste disposal, to undertake activities aimed at designing and construction of new waste management plants. One of these is a municipal solid waste sorting plant where the waste stream is divided into sub-screen and screen fraction. The screen fraction after removing ferrous and non-ferrous metals, glass and other impurities and crushing to an appropriate particle size constitutes an alternative fuel. The most frequently alternative fuel is manufactured from selectively collected plastics, rubber, textiles and waste paper. Alternative fuel is also manufactured from municipal solid waste in mechanical waste treatment plants. Municipal solid waste is characterized by a non-uniform morphological composition (depending on many factors), which may result in variable parameters of the manufactured fuel. If the waste fuel manufactured in this way and supplied to cement plants does not reach certain quality standards, its price is low, or the product is not accepted for energy recovery. The work presents results of analyses of selected properties of alternative fuels generated from solid municipal waste stream with regard to the type of communes from which the waste originated (urban commune area or rural communes). Statistical analysis was conducted using Bayesian Networks. As it results from the investigations, alternative fuel manufactured from municipal solid waste is characterized by high values of variation coefficient for such parameters as: ash content, moisture and calorific value. The content of carbon, sulphur and incineration heat revealed low values of variance coefficient. The analyses have demonstrated that technological values of alternative fuel do not depend on the administrative type of the communes where the waste used for their production was collected.
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Assessment of fuel spraying using schlieren system

75%
This paper presents results of research on spraying a diesel oil, bioester, alternative fuel, which can be rapeseed oil and mixtures of fuels that can be used to fire engines with compression ignition. The fuels were sprayed using an injector with a pintile spray tip. This type of an injector is used in engines of older construction with indirect injection, which commonly utilize alternative fuels. In order to visualize the jets a schlieren system was utilized. The collected photos were used to determine the cone angle of the jet. Among the fuels tested the rapeseed oil was characterized by the worse spraying characteristics. The average value of the angle for jets of this type of an oil significantly deviated from the average angles of the remaining fuels. Bioester, obtained from a process of transesterification of the rapeseed oil, was characterized by a very good spray angle. Its average cone angle was very high. The differences in angles were mostly due to the viscosity of different fuels. Average jet angles of the sprayed fuel for the rapeseed oil after it was supplemented with fuels of lower viscosity -ethylene and ethyl alcohol in an amount of 15% -increased however the difference between the angles proved statistically insignificant.
In order to minimise the adverse effects of SO2 and SO3 on the environment, many power plants and industrial facilities use flue gas desulphurisation (FGD) scrubbers to remove SO2 and SO3 from combustion gases. The conditions within a scrubber and accompanying installations are very severe and cause corrosion problems for common engineering materials. Failures impend over the environment for lengthy periods. This paper describes recent experience with corrosion and new construction materials of full-scale wet FGD systems. Materials description includes advantages and disadvantages, application areas, testing methods and relative costs of various materials.
Wood has been considered as a source of biomass and valuable technological material of beneficial ecological properties.
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Biogas as resources of energy

63%
The objective of the study described the importance of biogas and its importance. The biogas generally obtained from the waste. The so-called wastes that we discard and suffer with the consequences of improper management are of course partly huge energy and fertilizer sources that can support energy demands of cities greatly. Urban waste disposal is a serious challenge in all cities in the developing world, and its accumulation is an additional health hazard. Reliable and generally accepted disposal of the comparatively large amounts of digestate produced is necessary if biogas production is to be implemented. In this regard‟s discussion has been about the biogas production reaction involves, design and applications
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Kuchnie gazowe jako zrodlo emisji benzo[a]pirenu

51%
W pracy przedstawiono metodę spektrofluorometrycznego oznaczania benzo(a)pirenu bez wstępnego oddzielenia od innych wielopierścieniowych węglowodorów aromatycznych. W oparciu o opracowaną metodę określono zawartość tego związku w powietrzu zanieczyszczonym spalinami powstającymi podczas spalania wybranych paliw gazowych. Na podstawie przeprowadzonych badań ustalono, że podczas spalania warszawskiego gazu ziemnego nie powstaje benzo(a)piren. Natomiast spalenie mieszanki propan-butanu może powodować znaczne zanieczyszczenie powietrza omawianą substancją.
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