The problem of waste management and waste generation in the shipbuilding sector is crucial in the context of sustainability, in which context the concept of a circular economy system for both re-use and recycling of waste should also be included. For these considerations, the proposed study examines a combined system for optimising ship waste management and evaluates its possible use for energy purposes. In addition, this work aims to develop indicators to monitor and assess the instantaneous environmental impact in the air from different types of ships. With regard to the first point, a number of systems were analysed in relation to their potential to reduce greenhouse gas emissions, regardless of the routes and ports of destination. As a re- sult of this analysis, the case studies of particular interest were identified: the thermochemical treatment of waste oils and sludges to obtain fuel oils, the installation of a waste-to-energy plant and subsequent energy recov- ery on board, a potential innovative pattern of recycling food waste from cruise ships for use as feed in aquaculture and potential green practices with particular attention to paper input and output flows in a waste mini- mization perspective. UNFCCC (United Nations Framework Convention on Climate Change) methodologies were applied to two of these case stud- ies to calculate the reduction in greenhouse gas emissions resulting from their implementation. The results obtained are presented with the aim of supporting sustainable on-board waste management strategies in a carbon circular economy perspective. With regard to the second point, the main objective was to make an objective assessment of the ship’s environmental impact in real time to allow for possible adjustments and improve energy efficiency. The definition of these new indicators can be used as a decision support system for shipboard personnel. Environmental performance indi- cators are developed following the evaluation of data collected on board by specific instrumentation, marine exhaust cleaning systems, existing legis- lation. Different ship types, characterised by different propulsion system configurations, are considered using real experimental data provided by CETENA, a Fincantieri Group company. The indicators allow to compare the performance of the ship and the efficiency of the exhaust cleaning sys- tems under different operating conditions. They can be used as new tools, added to existing instrumentation that can be implemented to minimize the ship’s environmental footprint.

Implementation of impact mitigation measures for maritime transport: an analysis of alternative waste management practices, air emissions monitoring and GHG reduction

MAROTTA, VERONICA
2023-01-10

Abstract

The problem of waste management and waste generation in the shipbuilding sector is crucial in the context of sustainability, in which context the concept of a circular economy system for both re-use and recycling of waste should also be included. For these considerations, the proposed study examines a combined system for optimising ship waste management and evaluates its possible use for energy purposes. In addition, this work aims to develop indicators to monitor and assess the instantaneous environmental impact in the air from different types of ships. With regard to the first point, a number of systems were analysed in relation to their potential to reduce greenhouse gas emissions, regardless of the routes and ports of destination. As a re- sult of this analysis, the case studies of particular interest were identified: the thermochemical treatment of waste oils and sludges to obtain fuel oils, the installation of a waste-to-energy plant and subsequent energy recov- ery on board, a potential innovative pattern of recycling food waste from cruise ships for use as feed in aquaculture and potential green practices with particular attention to paper input and output flows in a waste mini- mization perspective. UNFCCC (United Nations Framework Convention on Climate Change) methodologies were applied to two of these case stud- ies to calculate the reduction in greenhouse gas emissions resulting from their implementation. The results obtained are presented with the aim of supporting sustainable on-board waste management strategies in a carbon circular economy perspective. With regard to the second point, the main objective was to make an objective assessment of the ship’s environmental impact in real time to allow for possible adjustments and improve energy efficiency. The definition of these new indicators can be used as a decision support system for shipboard personnel. Environmental performance indi- cators are developed following the evaluation of data collected on board by specific instrumentation, marine exhaust cleaning systems, existing legis- lation. Different ship types, characterised by different propulsion system configurations, are considered using real experimental data provided by CETENA, a Fincantieri Group company. The indicators allow to compare the performance of the ship and the efficiency of the exhaust cleaning sys- tems under different operating conditions. They can be used as new tools, added to existing instrumentation that can be implemented to minimize the ship’s environmental footprint.
Maritime, waste, greenhouse gases, circular carbon economy, waste-to-energy, climate change
File in questo prodotto:
File Dimensione Formato  
phdunige_2282545.pdf

accesso aperto

Descrizione: PhD Thesis in final version
Tipologia: Tesi di dottorato
Dimensione 1.81 MB
Formato Adobe PDF
1.81 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/1103474
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact