Acronym NA
Category
Seafood Processing
Title Styrt utetørking av tørrfisk: Storskalatest med nett over tørrfisken - Controlled drying of stockfish: Large-scale test with net over the stockfish Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Sjurdur Joensen Coordinator email sjurdur.joensen@nofima.no
Coordinator institution
NOFIMA - Norwegian Institute of Food, Fisheries and Aquaculture Research (Norway)
Institutions involved
NA
Start year 2010 End year 2010 Funding (€) € 78,536 Website https://www.fhf.no/prosjekter/prosjektbasen/900438/ Summary In order to achieve good quality stockfish, one must have good control over two main factors. First is the quality of the raw material, where one must follow up catch damage, guidance methods and storage before hanging. Secondly, the actual drying of rocks that are usually at the mercy of weather conditions, where one must follow up measures to reduce fly ash, reduce the effect of cold and reduce solar radiation that makes the fish unnecessarily hot. In 2008, the FHF project “ Mapping of factors that affect the drying of fish on rocks: Preliminary project”(FHF-900003) completed. There we looked at the factors that had an impact on the stockfish quality while the fish were hanging on hooks. Humidity and temperature measurements were performed in both air and fish. Knowledge of what affects the quality while the fish is hanging on hooks was also tried to be systematized by talking to players in the industry. The results from the preliminary project show in short that the fish are exposed to high or low temperatures for relatively short periods, which probably affects the quality negatively. Especially direct solar radiation on the fish will be able to raise the temperature in the core of the fish to up to 20 degrees above the air temperature. Higher humidity was also measured inside large rock areas, which is probably due to poorer drafts. In 2009, the FHF project “ Controlled outdoor drying of stockfish”(FHF-900194) carried out, where a test was made of the use of nets, water and fans to lower the temperature in the stockfish when the sun shines on the fish. The stockfish industry wants to continue traditional outdoor drying. In the experiments, short-term measures were therefore implemented so that the drying process in the open air is largely unchanged. The results from the experiments showed that a net that removes 70% of the sunlight was very suitable for lowering the temperature in the stockfish, at the same time as it seems to be the easiest and cheapest measure to use on a commercial scale. The present project was aimed at implementing this on a large scale. The steering group in Tørrfiskforum has chosen to continue with the work. The main focus will be measures to avoid heat in the fish from the sun. Measures to be tested are to cover the fish, cool it with a fan, and to cool it by adding water that cools by evaporation. In this project, the aim is to carry out experiments that document the effect of the proposed measures on the temperature in the fish in the 2009 season. By testing out some relevant types of equipment and procedures, one will see the effect on the temperature in the fish. One must check out how the measures are suitable in practice and how one should carry out large-scale experiments in detail. Material selection and use is central. This reduces the uncertainty in the implementation of a main trial that is planned to be carried out in 2010. Measures that work in practice can then be tested on a larger scale until the next season and possibly improved. In 2010, in addition to documenting the effect of the measures on temperature, the effect of the temperature reduction on the quality of stockfish will also be examined.
Keywords
Cod;
Fish products;
Process efficiency;
Fish;
Fish quality;
Marine Region
76
Not associated to marine areas
0
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