The growing demand for fresh water, together with the drive towards reducing environmental impacts, imposes the need to develop “green” and cost-effective wastewater treatment processes. From this point of view, biological treatment processes using activated sludge have seen an increasing development. However, some critical aspects of this process are still to be resolved, including the reduction of nutrients such as nitrogen and phosphorus, which often require additional stages characterized by chemical or physical treatments, with consequent increase in costs and environmental impacts. An alternative that has aroused great interest in the scientific community in recent years is represented by the use of microalgae in wastewater treatment. This alternative is particularly interesting in...
The linear economy model foresees an unlimited use of resources and without considering the impact of human activities involves:
acceleration of phenomena such as the loss of biodiversity and entire ecosystems;
increase in natural resources not supported by increased biocapacity;
greater volatility and higher prices for raw materials and natural resources.
Secondo la definizione della fondazione Ellen MacArthur, con l’espressione “Economia circolare” si intende un “termine generico per definire un’economia pensata per potersi rigenerare da sola”. L’economia circolare è dunque un sistema economico pianificato per riutilizzare i materiali in successivi cicli produttivi, riducendo al massimo gli sprechi. In quest’ottica, la corretta gestione dei rifiuti assume inevitabilmente un ruolo centrale.