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Zuliani, Filippo (2018) Nitrogen footprint: development and testing of new methodologies for the assessment of environmental impact related to the nitrogen cycle. [Ph.D. thesis]

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Abstract (english)

The research work addresses the topic of the assessment of environmental impact related to the nitrogen cycle. Starting from an analysis of the environmental effects derived from the alteration of the nitrogen cycle caused by human intervention and of the tools currently available to evaluate these effects, the objective of the research is to develop a new impact assessment methodology, based on an whole Life Cycle Assessment (LCA) approach and to verify its effectiveness in accounting and detailing the environmental impacts caused by a product system and by the related processes.
The proposed methodology overcomes some of the weaknesses identified in existing assessment tools, in particular by proposing a comprehensive LCA approach, applied at both methodological and operational level, and an orientation to the identification and accounting of environmental impacts. In particular, the methodology provides for a multistep approach that, starting from the identification of the nitrogen-containing substances of a product systems, first allows to account for reactive nitrogen and then, through specific characterization models, to assess the environmental effects for different impact categories to finally calculate, after normalization and weighting, a single stand-alone impact indicator. This approach allows identifying and accounting the environmental impacts related to the nitrogen cycle for a product system, quantifying also the contribution of the different processes and activities in the life cycle.
After the design phase, the methodology has been successfully tested in four different application cases, two based on database and two on real data collected on the field, demonstrating the validity and applicability of the proposed model and obtaining results consistent with the targets set for each application.
The proposed methodology has been defined and applied in all its phases and steps, with some computational shortcuts specially modeled on the application cases addressed in the research work: some further adaptations may therefore be required for applications in fields different from those proposed.

Abstract (italian)

Il lavoro di ricerca affronta il tema della valutazione degli impatti ambientali collegati al ciclo dell'azoto. A partire dall'analisi degli effetti sull'ambiente derivanti dalle alterazioni del ciclo dell'azoto provocate dall'intervento umano e dagli strumenti attualmente disponibili per la loro valutazione, l'obiettivo della ricerca è quello di sviluppare una nuova metodologia per la valutazione degli impatti, basata su un approccio LCA (Life Cycle Assessment) e verificarne l'efficacia per identificare e valutare gli impatti ambientali sul ciclo dell'azoto causati da un sistema prodotto e dai processi collegati.
La metodologia proposta intende superare alcuni dei punti di debolezza degli attuali strumenti di valutazione, proponendo in particolare un completo approccio di tipo LCA, applicato sia a livello metodologico sia a livello operativo, e un orientamento all'identificazione e valutazione degli impatti ambientali. Nello specifico, la metodologia prevede un approccio multifase che, partendo dall'identificazione delle sostanze contenenti azoto riconducibili ad un sistema prodotto, permette in primo luogo di quantificare l'azoto reattivio emesso e successivamente, attraverso l'applicazione di modelli di caratterizzazione, di valutare gli impatti ambientali per diverse categorie di impatto e di calcolare un indicatore finale attraverso operazioni di normalizzazione e pesatura.
Dopo la fase di progettazione, la metodologia è stata testata con esito positivo in quattro applicazioni, due basate su database e due basate su dati reali raccolti sul campo, dimostrando la validità e l'applicabilità del modello proposto e ottenendo risultati consistenti con gli obiettivi fissati per ogni applicazione.
La metodologia proposta è stata definita e applicata in tutte le singole fasi con alcune semplificazioni di calcolo specificamente adottate per ciascuno dei casi applicativi proposti: ulteriori adattamenti potrebbero pertanto essere necessari per applicazioni in ambiti differenti da quelli proposti.

EPrint type:Ph.D. thesis
Tutor:Scipioni, Antonio
Ph.D. course:Ciclo 30 > Corsi 30 > INGEGNERIA INDUSTRIALE
Data di deposito della tesi:15 January 2018
Anno di Pubblicazione:15 January 2018
Key Words:Azoto Impronta di azoto Ciclo dell'azoto Valutazione impatti ambientali Valutazione del ciclo di vita Nitrogen Nitrogen footprint Nitrogen Cycle Environmental impacts assessment Life Cycle Assessment
Settori scientifico-disciplinari MIUR:Area 09 - Ingegneria industriale e dell'informazione > ING-IND/27 Chimica industriale e tecnologica
Struttura di riferimento:Dipartimenti > Dipartimento di Ingegneria Industriale
Codice ID:11013
Depositato il:25 Oct 2018 15:32
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