Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater
Codfish is worldwide mostly consumed salt-cured due to the highly appreciated sensory characteristics promoted by salt. During the salting process huge amounts of salted wastewater are generated - approximately 22% w/w of the codfish - carrying ca. 250g/L of sodium chloride and ca. 10g/L of organic...
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2011
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Online Access: | https://ciencia.ucp.pt/en/publications/b83fb605-edce-44c5-8ea2-7312c02aa99f https://doi.org/10.1016/j.desal.2011.07.038 http://www.scopus.com/inward/record.url?scp=80054858497&partnerID=8YFLogxK http://hdl.handle.net/10400.14/7967 |
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ftucplisboacris:oai:ciencia.ucp.pt:publications/b83fb605-edce-44c5-8ea2-7312c02aa99f 2024-05-19T07:40:34+00:00 Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater Ferraro, Vincenza Cruz, Isabel B. Ferreira Jorge, Ruben Pintado, Manuela E. Castro, Paula M. L. 2011-10-17 https://ciencia.ucp.pt/en/publications/b83fb605-edce-44c5-8ea2-7312c02aa99f https://doi.org/10.1016/j.desal.2011.07.038 http://www.scopus.com/inward/record.url?scp=80054858497&partnerID=8YFLogxK http://hdl.handle.net/10400.14/7967 eng eng https://ciencia.ucp.pt/en/publications/b83fb605-edce-44c5-8ea2-7312c02aa99f info:eu-repo/semantics/closedAccess Ferraro , V , Cruz , I B , Ferreira Jorge , R , Pintado , M E & Castro , P M L 2011 , ' Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater ' , Desalination , vol. 281 , no. 1 , pp. 42-48 . https://doi.org/10.1016/j.desal.2011.07.038 Codfish Free amino acids Protein Salt extraction Salting wastewater Solvent extraction article 2011 ftucplisboacris https://doi.org/10.1016/j.desal.2011.07.038 2024-04-23T02:46:50Z Codfish is worldwide mostly consumed salt-cured due to the highly appreciated sensory characteristics promoted by salt. During the salting process huge amounts of salted wastewater are generated - approximately 22% w/w of the codfish - carrying ca. 250g/L of sodium chloride and ca. 10g/L of organic compounds, namely proteins and free amino acids. In this study, the salt load of wastewater generated during the salting process of codfish (Gadus morhua) was successfully reduced by ethanol extraction. The effects of time, sample:ethanol ratio, pH and temperature on salt extraction by ethanol addition were assessed by a one-variable-at-a-time approach and then by performing a 32 fractional factorial design. The effects of pH were also assessed in absence of ethanol. The maximum amount of salt precipitated in the wastewater was ca. 33%, at a wastewater-ethanol ratio 1:1 (v/v), at a temperature of 0°C and after 30min. Proteins and free amino acids present in the wastewater significantly limited salt precipitation; in a blank solution (salt in water at ca. 250g/L) a higher amount of salt, ca. 37%, was precipitated in the same conditions. Ethanol and temperature showed a linear effect on salt precipitation for both wastewater and blank solution however ethanol was the driving factor. Changes in pH did not result in salt precipitation either in absence or presence of ethanol. During salt extraction, no precipitation of free amino acids occurred in the wastewater while ca. 1.4% of protein fell into the precipitated phase along with the salt. Article in Journal/Newspaper Gadus morhua Research at Universidade Católica Portuguesa (Ciência-UCP) Desalination 281 42 48 |
institution |
Open Polar |
collection |
Research at Universidade Católica Portuguesa (Ciência-UCP) |
op_collection_id |
ftucplisboacris |
language |
English |
topic |
Codfish Free amino acids Protein Salt extraction Salting wastewater Solvent extraction |
spellingShingle |
Codfish Free amino acids Protein Salt extraction Salting wastewater Solvent extraction Ferraro, Vincenza Cruz, Isabel B. Ferreira Jorge, Ruben Pintado, Manuela E. Castro, Paula M. L. Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater |
topic_facet |
Codfish Free amino acids Protein Salt extraction Salting wastewater Solvent extraction |
description |
Codfish is worldwide mostly consumed salt-cured due to the highly appreciated sensory characteristics promoted by salt. During the salting process huge amounts of salted wastewater are generated - approximately 22% w/w of the codfish - carrying ca. 250g/L of sodium chloride and ca. 10g/L of organic compounds, namely proteins and free amino acids. In this study, the salt load of wastewater generated during the salting process of codfish (Gadus morhua) was successfully reduced by ethanol extraction. The effects of time, sample:ethanol ratio, pH and temperature on salt extraction by ethanol addition were assessed by a one-variable-at-a-time approach and then by performing a 32 fractional factorial design. The effects of pH were also assessed in absence of ethanol. The maximum amount of salt precipitated in the wastewater was ca. 33%, at a wastewater-ethanol ratio 1:1 (v/v), at a temperature of 0°C and after 30min. Proteins and free amino acids present in the wastewater significantly limited salt precipitation; in a blank solution (salt in water at ca. 250g/L) a higher amount of salt, ca. 37%, was precipitated in the same conditions. Ethanol and temperature showed a linear effect on salt precipitation for both wastewater and blank solution however ethanol was the driving factor. Changes in pH did not result in salt precipitation either in absence or presence of ethanol. During salt extraction, no precipitation of free amino acids occurred in the wastewater while ca. 1.4% of protein fell into the precipitated phase along with the salt. |
format |
Article in Journal/Newspaper |
author |
Ferraro, Vincenza Cruz, Isabel B. Ferreira Jorge, Ruben Pintado, Manuela E. Castro, Paula M. L. |
author_facet |
Ferraro, Vincenza Cruz, Isabel B. Ferreira Jorge, Ruben Pintado, Manuela E. Castro, Paula M. L. |
author_sort |
Ferraro, Vincenza |
title |
Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater |
title_short |
Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater |
title_full |
Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater |
title_fullStr |
Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater |
title_full_unstemmed |
Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater |
title_sort |
solvent extraction of sodium chloride from codfish (gadus morhua) salting processing wastewater |
publishDate |
2011 |
url |
https://ciencia.ucp.pt/en/publications/b83fb605-edce-44c5-8ea2-7312c02aa99f https://doi.org/10.1016/j.desal.2011.07.038 http://www.scopus.com/inward/record.url?scp=80054858497&partnerID=8YFLogxK http://hdl.handle.net/10400.14/7967 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Ferraro , V , Cruz , I B , Ferreira Jorge , R , Pintado , M E & Castro , P M L 2011 , ' Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater ' , Desalination , vol. 281 , no. 1 , pp. 42-48 . https://doi.org/10.1016/j.desal.2011.07.038 |
op_relation |
https://ciencia.ucp.pt/en/publications/b83fb605-edce-44c5-8ea2-7312c02aa99f |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.desal.2011.07.038 |
container_title |
Desalination |
container_volume |
281 |
container_start_page |
42 |
op_container_end_page |
48 |
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1799480149837611008 |