Overview on Dioxins and Furans Atmospheric Emissions in Romania

Vremera, Raluca; Costinel, Diana; Ionete, Roxana Elena; Titescu, Gheorghe

doi:10.30638/eemj.2011.036

Cited by 2 publications

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“…For a total TCDD of 1.003 ng/kg, the value was below that set for the cleaning level, 13.000 ng/kg. According to previous studies [ 47 , 48 ], there is no risk of handling this waste or the produced reaction products (MBM PYGAS , MBM PYOIL , and MBM PYCHAR ) with this cleaning level for 2,3,7,8-TCDD in MBM.…”

Section: Resultsmentioning

confidence: 98%

“…Therefore, the equivalent total toxicity concentration (TEC), defined as the concentration of individual congener dioxins/furans, mixed carcinogens multiplied by their relative power factors or toxic equivalence factors, was first addressed. For that, the most common and toxic dioxin 2,3,7,8 tetrachlorodibenzo-dioxin (TCDD), with a toxic equivalence factor (TEF) of 1 [ 45 ], was used as a reference, and results on Polychlorinated dibenzo-p-dioxins (PCDDs)/ Polychlorinated dibenzo-p-furans (PCDFs) concentrations in MBM, but also the equivalent TEC toxicity concentration, were assessed [ 46 , 47 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

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Eco-Friendly Alternative Disposal through the Pyrolysis Process of Meat and Bone Meal

et al. 2022

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The capitalization of agri-food waste is essential for the sustainability of a circular economy. This work focuses on a solution to eliminate such waste, meat and bone meal (MBM), which is produced in large quantities by the food industry and is prohibited for use as animal feed under the European directives. Therefore, with the focus of converting waste to energy, the catalytic pyrolysis of MBM in the presence of mesoporous silica nanocatalysts (SBA-3 and SBA-16 materials and metallic derivates) was investigated in a home-made reactor for the production of renewable energy. The mesoporous silica materials were synthesized using relatively simple methods and then characterized in order to determine their morpho-structural characteristics. The MBM pyrolysis behavior under different experimental conditions was examined in detail, both in the presence and absence of the new catalysts. The resulting MBM-based pyrolysis products, MBMPYOILs and MBMPYGASs, were also assessed as potential alternative fuels, highlighting comparable energy values to conventional fuels. The outcomes of this investigation offer a potential pathway to the clean production of gas and oil, thus promoting the high-grade utilization of MBM waste.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Eco-Friendly Alternative Disposal through the Pyrolysis Process of Meat and Bone Meal

et al. 2022

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Evaluation of the fuel potential of sewage sludge mixtures with beech sawdust and lignite

Constantinescu

Oancea

Bucura³

et al. 2018

Journal of Renewable and Sustainable Energy

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Sewage sludge (SS) from municipal wastewater treatment has drawn serious attention of scientists around the world in the attempt to find feasible disposal methods. Therefore, in this work, a solution for valorisation of SS as solid fuel is proposed based on an advanced compositional investigation of SS versus conventional solid fuels, namely, lignite (L) and beech sawdust (BS). A characterisation in terms of proximate analysis and ultimate analysis was performed for the studied materials, both to SS, L, and BS as single fuel and to bi-component mixture formulas of SS and L/BS, in variable proportions of 30:70, 50:50, and 70:30. SS:BS based blends had higher hydrogen (from 4.43 wt. % to 5.14 wt. %) and carbon (from 30.76 wt. % to 40.12 wt. %) contents than the SS:L mixtures, very close to the one for BS (5.5 wt. % for hydrogen and 44.00 wt. % for carbon), indicating a more efficient release of energy during combustion. The combustion behaviour of SS and its blends with L and BS was also studied by thermogravimetric analysis (DSC-TGA) by heating the samples from ambient temperature up to 1100 °C at a rate of 20 °C/min under a nitrogen inert atmosphere. Analysis showed differences among SS, L, and BS, and the improvements were observed in the SS combustion profile after the addition of L or BS. The best potential as an alternative fuel was showed by the blends SS+L in a proportion of 30%:70% and SS+BS as a 30%:70% mixture. Additional information regarding the environmental risk induced by SS was obtained through the determination of the content of dioxines, furans, and carcinogenic polycyclic aromatic hydrocarbons of dried sewage sludge and the calculation of the toxicity equivalent factor. The values were within acceptable limits, and therefore, the proposed solution for valorization of waste sewage sludge offers a feasible way to reduce the anthropogenic impact and to enhance the durable development of the society.

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Overview on Dioxins and Furans Atmospheric Emissions in Romania

Cited by 2 publications

References 0 publications

Eco-Friendly Alternative Disposal through the Pyrolysis Process of Meat and Bone Meal

Eco-Friendly Alternative Disposal through the Pyrolysis Process of Meat and Bone Meal

Evaluation of the fuel potential of sewage sludge mixtures with beech sawdust and lignite

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