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Recuperação de compostos clorados e energia a partir de resíduos contendo PVC

Os resíduos são considerados uma fonte atrativa para a produção de energia, principalmente os de base polimérica. Várias são as técnicas de valorização térmica e energética, como a pirólise, que constituem alternativas com elevado potencial no que concerne à produção de combustíveis alternativos e energia. Estas técnicas, quando aplicadas a resíduos, favorecem a formação de produtos com valor acrescentado. A ut...

Development of a process for waste eggshell valorisation

In this work it was evaluated the adsorption efficiency of calcined eggshell from the egg-breaking operations in the treatment of wastewaters from different industrial units. It was evaluated the removal of organic material, expressed as chemically oxygen demand (COD), in leachate wastewaters from sanitary landfill (LLWW) and the municipal residual wastewaters (NWW). It was also assessed the efficiency of alkal...

Recovery of copper and nickel hydroxide from galvanic sludge : pilot scale expe...

The present work has been developed under the scope of the project VALMETAIS and proposes a hydrometallurgical process for copper and nickel hydroxide recovery from galvanic sludges produced by Ni/Cr plating plants. In this project. the procedure has been developed at a laboratory scale and validated at a small sized pilot plant. The developed procedure includes a first stage of a counter-current sulphuric leac...

OILCA : enhancing the competitiveness and reducing the carbon footprint of the ...

OiLCA is an international project by the INTERREG IVB SUDOE communitarian initiative. It aims to improve the competitiveness of the olive sector in the south-western Europe region, which includes Spain, Portugal and the South of France. The OiLCA methodology is based on life cycle assessment (LCA) and life cycle cost (LCC) to identify opportunities for the optimization of olive oil production. Olive oil product...

Value - exchange and technological transfer on the recovery of wastes from vege...

One of the problems associated with the vegetable processing industry on SUDOE space (South-western Europe region, which includes Spain, Portugal and the South of France), relates the management and recovery of waste and currently for many, still an unsolved problem. Among the weakness listed in the SWOT analysis of SUDOE program, the low level of waste treatment with respect to other European countries appears...

Energetic valorisation of PVC-containing waste

Wastes are increasingly regarded as important sources of energy, particularly their polymeric component. However, most of these wastes contain polyvinyl chloride (PVC) in their composition, constraining the use of a thermal valorization process in their treatment [1]. This work aims the development of a process for the material and energetic valorization of the PVC-containing wastes. A two-step process was firs...

Valmetais : desenvolvimento de processo para recuperação de metais não ferrosos...

Projecto PVC4GAS : valorização material e energética de resíduos com PVC

Study of a two steps process for the valorization of PVC-containing wastes

Published online 27 November 2012 ; The presence of organic compounds in wastes, namely polymer based compounds, is considered a potential relevant source of energy. However, the presence of polyvinyl chloride (PVC) in their composition, causes recycling problems when a thermal process is considered for the wastes treatment [1] preventing its use on processes which the main goal is the energy recovery (Zevenho...

Kinetics of thermal de-chlorination of PVC under pyrolytic conditions

Although PVC-containing wastes are an important potential source of energy they are frequently disposed in landfill. In thermal treatment processes such as pyrolysis and gasification, the presence of poly(- vinyl chloride) (PVC), a compound with 56.7% of chlorine, may cause problems concerned with environmental protection, as consequence of the formation of hydrochloric acid, chlorine gas and dioxins, as well a...