resumo
Waste valorisation as secondary or alternative raw materials in several sectors products and processes has been an important way to implement a more sustainable and circular way to manage the efficient use of natural resources. This action contributes not only to save natural resources but also to prevent sending large amounts of wastes, some of them dangerous, to landfill disposal, creating a major environmental, economic and social impact. To promote circular economy, this work attempts to demonstrate the environmental gains in a competitive way, by bringing together in an industrial symbiosis action, two large producing sectors (the pulp and paper industry and concrete construction sector), which are also able to consume significant amounts of resources and to generate large amounts of wastes. A sustainability evaluation based on a life cycle and circular approach is presented and discussed using a simple case study performed at real industrial scale. The lime ash waste from the pulp and paper industry is used to replace 100% of the natural filler used in precast concrete production and the impacts and benefits from the technical, environmental, economic and social level were assessed. It was demonstrated that this simple action causes positive impacts in the evaluated dimensions of sustainability without causing any changes in production time and causes no degradation on relevant concrete properties.
palavras-chave
ENVIRONMENTAL EVALUATION; LIME-MUD; FLY-ASH; PULP; BIOMASS
categoria
Chemistry, Multidisciplinary; Engineering, Multidisciplinary; Materials Science, Multidisciplinary; Physics, Applied
autores
Simoes, F; Rios-Davila, FJ; Paiva, H; Maljaee, H; Morais, M; Ferreira, VM
nossos autores
Fábio José Ferraz Simões
Estudante de doutoramento
Hamid Maljaee
Bolseiro de pós-Doutoramento
Helena Maria da Costa Paiva
Investigador
Victor Miguel Carneiro de Sousa Ferreira
Professor associadoagradecimentos
This research was funded by the European Union H2020 Program through the project PAPERCHAINNew market niches in the paper & pulp industry, grant number 730305, 20172021.