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Open AccessFeature PaperArticle

Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management

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Department of Industrial Engineering, University of Bologna, 40136 Bologna, Italy
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Interdepartmental Centre for Industrial Research in Building and Construction, 40131 Bologna, Italy
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Department of Civil, Environmental, Chemical and Materials Engineering, University of Bologna, 40136 Bologna, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Ricardo Briganti
J. Mar. Sci. Eng. 2021, 9(2), 197; https://doi.org/10.3390/jmse9020197
Received: 30 December 2020 / Revised: 8 February 2021 / Accepted: 8 February 2021 / Published: 12 February 2021
The need to remove deposited material from water basins is common and has been shared by many ports and channels since the earliest settlements along coasts and rivers. Dredging, the most widely used method to remove sediment deposits, is a reliable and wide-spread technology. Nevertheless, dredging is only able to restore the desired water depth but without any kind of impact on the causes of sedimentation and so it cannot guarantee navigability over time. Moreover, dredging operations have relevant environmental and economic issues. Therefore, there is a growing market demand for alternatives to sustainable technologies to dredging able to preserve navigability. This paper aims to evaluate the effectiveness of guaranteeing a minimum water depth over time at the port entrance at Marina of Cervia (Italy), wherein the first industrial scale ejector demo plant has been installed and operated from June 2019. The demo plant was designed to continuously remove the sediment that naturally settles in a certain area through the operation of the ejectors, which are submersible jet pumps. This paper focuses on a three-year analysis of bathymetries realized at the port inlet before and after ejector demo plant installation and correlates the bathymetric data with metocean data (waves and sea water level) collected in the same period. In particular, this paper analyses the relation between sea depth and sediment volume variation at the port inlet with ejector demo plant operation regimes. Results show that in the period from January to April 2020, which was also the period of full load operation of the demo plant, the water depth in the area of influence of the ejectors increased by 0.72 mm/day, while in the whole port inlet area a decrease of 0.95 mm/day was observed. Furthermore, in the same period of operation, the ejector demo plant’s impact on volume variation was estimated in a range of 245–750 m3. View Full-Text
Keywords: ejectors; sediment transport rate; port sediment management; effectiveness assessment ejectors; sediment transport rate; port sediment management; effectiveness assessment
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MDPI and ACS Style

Pellegrini, M.; Aghakhani, A.; Gaeta, M.G.; Archetti, R.; Guzzini, A.; Saccani, C. Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management. J. Mar. Sci. Eng. 2021, 9, 197. https://doi.org/10.3390/jmse9020197

AMA Style

Pellegrini M, Aghakhani A, Gaeta MG, Archetti R, Guzzini A, Saccani C. Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management. Journal of Marine Science and Engineering. 2021; 9(2):197. https://doi.org/10.3390/jmse9020197

Chicago/Turabian Style

Pellegrini, Marco; Aghakhani, Arash; Gaeta, Maria G.; Archetti, Renata; Guzzini, Alessandro; Saccani, Cesare. 2021. "Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management" J. Mar. Sci. Eng. 9, no. 2: 197. https://doi.org/10.3390/jmse9020197

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