Tag: Drying

Reports

Improved processing of capelin roes

Published:

01/06/2009

Authors:

Margeir Gissurarson, Ragnheiður Sveinþórsdóttir, Þorgrímur Kjartansson, Sigurjón Arason, Guðjón Þorkelsson, Sindri Sigurðsson, Jón Helgason, Björn Brimar Hákonarson

Supported by:

AVS Fisheries Research Fund

Contact

Margeir Gissurarson

Strategic Scientist

margeir.gissurarson@matis.is

Improved processing of capelin roes

The processing of capelin roe is largely based on research and development that took place between 1972 and 1982. The weakness of the processing process has been the drying of the roe, where roe is left in pots for up to 20 hours where excess water is allowed to leak. . The drying method disrupts the continuity of processing, is costly and increases the risk of microbial growth in the product. The report discusses the effect of processing factors on the chemical and physical properties of capelin roe, as well as the results of experiments with continuous drying during the processing of capelin roe.

Current processing technique of Capelin roes is based on research and development carried out in 1972 to 1982. The weakness of the current process is the drying procedure where the roes are allowed to stand for up to 20 hours while excess water drains off to desirable level. This drying process disturbs the continuity of the process, is costly and increases the risk of bacteria growth. This report discusses the influence of various processing steps on the physical and chemical composition of the Capelin roes and results from experiments with continuous drying procedures in the processing of Capelin roes.

Report closed until 01.07.2011

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Reports

Process control for fishing, processing and processing of salted fish. Effects of different salting methods on the effect of cod fillets

Published:

01/07/2007

Authors:

María Guðjónsdóttir, Þóra Valsdóttir, Ása Þorkelsdóttir, Kolbrún Sveinsdóttir, Hannes Magnússon, Sigurjón Arason, Kristín A. Þórarinsdóttir

Supported by:

AVS, Rannís Technology Development Fund

Contact

Þóra Valsdóttir

Project Manager

thora.valsdottir@matis.is

Process control for fishing, processing and processing of salted fish. Effects of different salting methods on the effect of cod fillets

A comparison was made of the effects of different salting methods on the utilization, quality and other properties of salted cod fillets. One group was only pre-salted but other groups were pre-salted in different ways, ie. by brine salting, spraying and / or pickling. Injured fish had a higher utilization and came out better in quality assessment than uninjected fish. However, the results indicated that the odor and taste of action were higher in unsprayed fish. The effect of phosphate use and spraying on drying properties due to higher water and salt content in products was investigated. It was found that injected fish lost less weight during drying. For the aforementioned reasons, the water content turned out to be higher after drying than in unsprayed fish. The fillets of the dried products varied according to whether the chemical content was based on drying or weight loss on drying. Therefore, the criteria for new salting processes need to be revised and drying processes need to be adapted to the changed properties of salted products.

The effects of different salting processes on yield, quality and other characteristics of salted and cured products were evaluated. Various combinations of salting steps were tested, one group was only dry salted but other groups were first pickle salted, brine injected and / or brine salted. The injected products had higher yield and higher quality than other products. The results indicated that the curing odor and flavor were stronger in products that were not injected. The water and salt content was higher in injected fillets which is important with regard to continuing processes, like drying and rehydration. Measurements during and after drying showed that injection resulted in lower drying rate and higher water content of the fillets. Dried products have been rated in different classes with regard to water content and weight changes during drying. Due to changes in the salting process and drying properties of the salted fish, these reference values have to be reconsidered.

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