NDLI: Mitigation of marine biofouling on tubes of open rack vaporizers using electromagnetic fields.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Trueba, Alfredo Vega, Luis M. García, Sergio Otero, Félix M. Madariaga, Ernesto
Description	Author Affiliation: Trueba A ( Department of Sciences & Techniques of Navigation and Ship Construction, University of Cantabria, C/ Gamazo 1, 39004 Santander, Spain E-mail: vegalm@unican.es.); Vega LM ( Department of Sciences & Techniques of Navigation and Ship Construction, University of Cantabria, C/ Gamazo 1, 39004 Santander, Spain E-mail: vegalm@unican.es.); García S ( Department of Sciences & Techniques of Navigation and Ship Construction, University of Cantabria, C/ Gamazo 1, 39004 Santander, Spain E-mail: vegalm@unican.es.); Otero FM ( Department of Sciences & Techniques of Navigation and Ship Construction, University of Cantabria, C/ Gamazo 1, 39004 Santander, Spain E-mail: vegalm@unican.es.); Madariaga E ( Department of Sciences & Techniques of Navigation and Ship Construction, University of Cantabria, C/ Gamazo 1, 39004 Santander, Spain E-mail: vegalm@unican.es.)
Abstract	This study quantitatively evaluates the antifouling action of the continuous physical treatment with electromagnetic fields (EMFs) of seawater used as heat exchanger fluid in an open rack vaporizer (ORV) pilot plant to reduce the growth of biofouling on external rib-tube surfaces. The results demonstrate that the biofilm adhered on the treated rib-tubes was reduced by 33% in thickness and by 44% in dissolved solids regarding the biofilm adhered on the untreated control rib-tubes. The lower conductivity and Ca(2+) and Mg(2+) ionic content in the effluent of the treated seawater confirmed that the EMFs accelerated the process of ionic calcium nucleation and precipitation as calcium carbonate. The precipitation of ions dissolved affected the inter-molecular interactions among extracellular polymers, thereby weakening the biofouling film matrix and reducing its adhesion capacity. The drag of small particles by the flow of seawater had an erosive action and decreased the biofouling film thickness. Consequently, the antifouling methods treatment with EMFs allowed reduce the negative effect that the biofouling have for the heat transfer equipment used in the regasification process and keep the highest techno-economic operating conditions.
File Format	HTM / HTML
ISSN	02731223
Issue Number	5
Volume Number	73
e-ISSN	19969732
Journal	Water Science & Technology
Language	English
Publisher	IWA Publishing
Publisher Date	2016-01-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Hydrology Biofilms Growth & Development Biofouling Electromagnetic Fields Calcium Carbonate Chemical Precipitation Hot Temperature Magnesium Chemistry Nebulizers And Vaporizers Seawater Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology

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