Waste sanitary landfilling is generally opposed by public opinion as responsible of aquifer contamination even when other possible contaminating sources exist in the area. A new tool based on time-spatial evaluation of groundwater contamination is presented, capable of appreciating the direct responsibilities of a MSW sanitary landfill when the aquifer becomes polluted. A successful application of the tool to the case of a medium-size Italian city is discussed.
Energy production by combustion of S-containing non-renewable fuels requires huge consumption of limestone for the necessary Flue Gas Desulfurization (FGD) treatment in order to meet stringent SO2 emission limits. FGD (wet, dry or semi-dry) is an expensive, energy intensive, process due to its overall poor efficiency and to the need of using finely micronized CaCO3. Wet FGD laboratory tests with dolomite slurry have shown that up to ≈ 50% higher performance and faster SO2 uptake occur if the mineral is micronized by high energy mill, yielding mechanochemical activation of the solid. Further benefits arise from the use of dolomite which consistently contains Mg carbonate.
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