Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2022
Abstract
Two Life-Cycle Assessments (LCAs) were conducted to evaluate the environmental performances of selected novel eco-intensification innovations for the treatment and valorisation of sludge and fish mortalities from finfish aquaculture. The first innovation is based on a new process for filtering and drying particles from the reject water from a Recirculating Aquaculture System (RAS), with end-of-life recovery of nutrients and biomass to be reused as organic fertiliser or as energy source. The second process is based on a new device for drying fish mortalities and reusing the end-product as ingredient in the pet food industry or as energy source. Innovations refer to a functional unit of 1 ton of farmed fish and of fish mortalities, respectively, and were tested with a RAS for smolt production within the physical system boundary of a Norwegian facility. A set of standard indicators was selected for the Life-Cycle Impact Assessment (LCIA). The results indicate that the new processes compare well with the established ones, showing a marked decrease in most impact categories: indicators decrease by −12% through to −67% when sludge treatment innovations are applied, and by more than −86% after novel changes about fish mortality, with water consumption instead increasing by +7% and up to +50%, respectively. Furthermore, the analysis provided insights which could lead to improve their environmental performances.
Authors
Christina Hoerterer Jessica Petereit Gisela Lannig Johan Johansen Gabriella V. Pereira Luis E. C. Conceição Roberto Pastres Bela H. BuckAbstract
In Europe, turbot aquaculture has a high potential for sustainable production, but the low tolerance to fishmeal replacement in the diet represents a big issue. Therefore, this study investigated the effects of more sustainable feed formulations on growth and feed performance, as well as nutritional status of juvenile turbot in recirculating aquaculture systems. In a 16-week feeding trial with 20 g juvenile turbot, one control diet containing traditional fishmeal, fish oil and soy products and two experimental diets where 20% of the fishmeal was replaced either with processed animal proteins (PAP) or with terrestrial plant proteins (PLANT) were tested. Irrespective of diets, growth performance was similar between groups, whereas the feed performance was significantly reduced in fish of the PAP group compared to the control. Comparing growth, feed utilisation and biochemical parameters, the results indicate that the fish fed on PAP diet had the lowest performance. Fish fed the PLANT diet had similar feed utilisation compared to the control, whereas parameters of the nutritional status, such as condition factor, hepato-somatic index and glycogen content showed reduced levels after 16 weeks. These effects in biochemical parameters are within the physiological range and therefore not the cause of negative performance. Since growth was unaffected, the lower feed performance of fish that were fed the PAP formulation might be balanced by the cost efficient formulation in comparison to the commercial and the PLANT formulations. Present study highlights the suitability of alternative food formulation for farmed fish.
Abstract
No abstract has been registered
Authors
Jiangsan ZhaoAbstract
No abstract has been registered
Authors
Jiangsan ZhaoAbstract
No abstract has been registered
Authors
Linn VassvikAbstract
No abstract has been registered
Authors
Ruben Erik Roos Johan Asplund Tone Birkemoe Aud Helen Halbritter Rechsteiner Siri Lie Olsen Linn Vassvik Kristel van Zuijlen Kari KlanderudAbstract
No abstract has been registered
Authors
Nhat Strøm-AndersenAbstract
No abstract has been registered
Authors
Nhat Strøm-AndersenAbstract
This paper investigates the adoption of digital technologies for food waste reduction and prevention in Norway. It goes beyond studying one single technology, aiming to have a broad understanding of digital technology adoption as ‘a (digital) innovation system’ by applying a multiple case study of four different digital technologies used by companies in the food and hospitality sector in Norway. I strive to understand why Norwegian companies, i.e. food producers, grocery chains, restaurants, and cafes (or technology adopters) adopt the technologies in the first place and what benefits and challenges they may encounter along with the adoption. Data inputs for this paper are gathered from semi-structured interviews with several technology adopters. Empirical insights show that the benefits include economic advantage by reducing the amount of waste and increased awareness among employees. However, there are at least several challenges concerning the adoption of digital technologies. Some adopters found that the digital technologies were too costly, incompatible with their internal (IT) systems, or mismatched economic models. Another challenge is employee awareness about food waste and related digital technologies. The paper sheds light on the multiple and complex challenges in adopting digital technologies for food waste prevention and reduction.
Abstract
No abstract has been registered