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Comparison of Ashes Produced in a Biomass Moving Grate Boiler by Wood Chips and Sewage Sludge

Fluid Dynamics & Materials Processing 2022年第5期18卷 1419-1425页

作者： Baraket Nada Brandelet Benoit TrouvéGwenaëlle Rogaume Yann Universitéde Lorraine-LERMAB-ERBE Epinal88000France lgre Institut de Recherche Jean-Baptiste Donnet Universitéde Haute-AlsaceMulhouse6809France ADEME Angers49004France

One option to fight global warming is to convert our use of fossil energy into renewables such as biomass ***,the forest preservation and the quality of the ambient air are also two major ***,the use of biomass waste without any supplementary emissions could represent a part of the *** this study,two fuels were considered for a 200 kW moving grate boiler.A multicyclone and a bag filter were fitted on the *** first fuel consisted of classical wood chips whereas the second was a mixture of wood chips with sewage *** second fuel presented a high ashes mass ratio compared to wood *** aim was to verify the possibility to burn this kind of fuel without any modification of the *** first relevant result is that the conventional pollutants,i.e.,CO and NOx,remained under the emissions limits even with the sewage sludge *** Total Suspended Particles emissions at the exhaust were always under 5.4 mg·Nm-3 dry based corrected at 6%of O_(2),which is low with respect to the standard *** majority of the ashes remained on the combustion ***,with both fuels,about 5%of ashes mass remained in the heat ***,the heat exchanger was more clogged with the second fuel,which produced five time more *** may lead to a yield ***,sewage sludge can be used in a wood boiler without any issue if an automatic exchanger sweep is fitted on the installation.

关键词： Combustion energy biomass ashes TSP

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A comparative study of the sorption of O-PAHs and PAHs onto soils to understand their transport in soils and groundwater

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Journal of Environmental Sciences 2023年第2期124卷 61-75页

作者： W.Almouallem J.Michel S.Dorge C.Joyeux G.Trouve D.Le Nouen French National Institute for Industrial and Environment and Risks Direction Sites&TerritoiresVerneuil en HalatteF-60550France University of Haute-Alsace Laboratoire Gestion des Risques et Environnement(LGRE)UR2334MulhouseFrance University of Strasbourg 67000 StrasbourgFrance University of Haute-Alsace Laboratoire d’Innovation Moléculaire et Applications(LIMA)UMR 7042 CNRSMulhouseFrance

Polycyclic aromatic hydrocarbons(PAHs)and their oxygenated derivates(O-PAHs)are identified in soils and groundwater of industrialized sites and contribute to the risk for Humans and the ***,data are scarce in literature concerning their retention and transfer in soils and no soil-water partition coefficients are available for these *** of two PAHs,fluorene and acenaphthene and two O-PAHs,9H-fluorenone and dibenzofuran onto two soils with different organic carbon contents was evaluated and compared by determining their sorption *** of ionic strength and liquid to solid ratio,on fluorene and fluorenone sorption was also *** equilibrium is achieved within less than 24 hr of mixing and linear sorption models best fit the isotherm *** and dibenzofuran are similarly sorbed onto the *** of fluorene is higher than the one of fluorenone,showing a smaller affinity of fluorenone towards the solid *** means that O-PAH could form larger contamination plumes in groundwater than *** the L/S ratio from 100 to 50 and 30,increases the sorption of fluorenone onto the soil by 56% and 67%respectively,while the sorption of fluorene is slightly *** the ionic strength of the aqueous phase also modifies the sorption of fluorenone,contrary to the sorption of fluorene which is slightly affected.

关键词： PAHs O-PAHs Contaminated soils Groundwater Sorption Kinetics Isotherms

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