Bitumen is a highly valued and much used roofing material, but as an oilbased, non-renewable product, bitumen is now no longer sustainable. In response to this growing need to produce more sustainable construction materials, Icopal bv, Algaecom and the Hanze University of Applied Sciences collaborated on the study to replace part of the fossil oil by Algal oils.
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Oil extraction from Andean lupin beans (Lupinus mutabilis SWEET) via supercritical carbon dioxide (scCO2) was studied on both lab scale and pilot scale. On the lab scale, the effect of pressure, solvent-to-feed ratio (S/F), sample particle size and temperature on oil yield were evaluated. The oil quality (fatty acid [FA] composition and tocopherol content) were investigated. Five-hour scCO2 extraction yielded about 86% oil of Soxhlet extraction (using hexane as solvent). The fraction of unsaturated FA rose with extraction pressure at specific time. High tocopherol contents were detected in oils extracted at low pressure. An increase in temperature was unfavorable to oil and tocopherol yield, thereby confirming the validity for preserving oil extract quality under a mild scCO2 extraction condition. Oil quality and yield did not have identical optimum settings, opening up possibilities for producing different qualities of oils. Pilot-scale extraction offered comparable oil yield to lab-scale extraction at similar S/F ratio. Economic evaluation showed that it is promising to implement industrial scale scCO2 process for lupin oil extraction. It was predicted that, at a specific industrial scale of extraction (2 × 1000 L, 550 bar, 40°C and S/F of 24), the manufacturing cost of oils got close to actual commercial production cost.
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Dark homogenous fungal-based layers called biofinishes and vegetable oils are keyingredients of an innovative wood protecting system. The aim of this study was todetermine which of the vegetable oils that have been used to generate biofinishes onwood will provide carbon and energy for the biofinish-inhabiting fungus Aureobasidiummelanogenum, and to determine the effect of the oil type and the amount of oil on thecell yield. Aureobasidium melanogenum was cultivated in shake flasks with differenttypes and amounts of carbon-based nutrients. Oil-related total cell and colony-formingunit growth were demonstrated in suspensions with initially 1% raw linseed,stand linseed, and olive oil. Oil-related cell growth was also demonstrated with rawlinseed oil, using an initial amount of 0.02% and an oil addition during cultivation. Nilered staining showed the accumulation of fatty acids inside cells grown in the presenceof oil. In conclusion, each tested vegetable oil was used as carbon and energysource by A. melanogenum. The results indicated that stand linseed oil provides lesscarbon and energy than olive and raw linseed oil. This research is a fundamental stepin unraveling the effects of vegetable oils on biofinish formation.
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Arthropod pests cause signifcant problems in agricultural crops all around the world. As chemical pesticide use becomes less desired, there is a need for alternative methods of pest control. Inspired by the natural adhesiveness of arthropod trapping plants, we examined the efectiveness of adhesive droplets made from oxidised and cross-linked plant-derived oils for control of western fower thrips.Key message:-Adhesive oil-based droplets can catch thrips and reduce their reproduction, survival and damage.-Among diferently sized droplets (up to>10 mm2), larger droplets trap relatively more thrips.-Droplets remain present after rinsing with water suggesting potential for in- and outdoor use.Keywords: duurzame gewasbescherming, biomimicry, insecten, trips, trichomen
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In certain conditions, (part of) an oil spill can disappear from the water surface through a process called natural dispersion. One available oil spill response option is to enhance this process by addition of dispersants (chemical dispersion). An informed decision for such response requires insight in the oil slick size WITH and WITHOUT treatment. This thesis aims to enable such assessment of net effectiveness, by providing a strategy for modelling the dispersion process. A plunging jet test was developed for investigating entrainment and droplet breakup. Using this set up the relevance of oil layer thickness was proven and an algorithm to model droplet sizes of dispersed oil was defined. The findings were applied in a model simulating dispersion and resurfacing as well as the wind-driven differential transport between the floating slick and suspended droplets. The simulation outputs help assess the added value (or not) of dispersant application in reducing the surface oil slick size for different oil types and conditions.
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COTOPAXI is an ANDEAN lupin which has obtained Plant Breeder Rights by Vandinter Semo BV, the Netherlands. COTOPAXI is rich in protein (45%) and oils (20%). COTOPAXI will positively contribute to the plant-based protein transition in hte Netherlands and Europe.
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Concepts to protect wood from factors like ultraviolet (UV) radiation, water and wood-decaying fungi with the help of fungi exist in different variants. The idea to treat wood with the help of linseed oil and the living fungus Aureobasidium pullulans originated in 1996 during an European project assessing sustainable protection systems (Sailer et al., 2010). At that time, wood impregnated with natural oils resulted surprisingly in an evenly dark colored surface. These color changes were usually associated with irregular discoloration and staining and were further investigated. It has been shown that the fungus Aureobasidium pullulans was growing on surfaces treated with linseed oil. The fact that Aureobasium pullulans reproducibly grows on water repellent linseed surfaces in many regions around the world makes it suitable for use in a wide range of applications. Research did show that Aureobasidium pullulans produces pigments and binders on its own. This contribution documents the investigation to, identify the possibilities of biological wood surface treatment with Aureobasidium. The combination of the hydrophobizing effect of linseed oil and the surface treatment with the so-called biofinish creates an aesthetically appealing dark living surface, which significantly prolongs the life of wood outdoors and reduces maintenance costs. Since the idea has been developed into an industrially applicable process (Xyhlo biofinish, 2018). Using this concept, building components e.g. façades can be protected with a biological and functional coating thereby contribution to lessen the environmental impact of buildings.
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The increasing rate of urbanization along with its socio-environmental impact are major global challenges. Therefore, there is a need to assess the boundaries to growth for the future development of cities by the inclusion of the assessment of the environmental carrying capacity (ECC) into spatial management. The purpose is to assess the resource dependence of a given entity. ECC is usually assessed based on indicators such as the ecological footprint (EF) and biocapacity (BC). EF is a measure of the biologically productive areas demanded by human consumption and waste production. Such areas include the space needed for regenerating food and fibers as well as sequestering the generated pollution, particularly CO2 from the combustion of fossil fuels. BC reflects the biological regeneration potential of a given area to regenerate resources as well to absorb waste. The city level EF assessment has been applied to urban zones across the world, however, there is a noticeable lack of urban EF assessments in Central Eastern Europe. Therefore, the current research is a first estimate of the EF and BC for the city of Wrocław, Poland. This study estimates the Ecological Footprint of Food (EFF) through both a top-down assessment and a hybrid top-down/bottom-up assessment. Thus, this research verifies also if results from hybrid method could be comparable with top-down approach. The bottom-up component of the hybrid analysis calculated the carbon footprint of food using the life cycle assessment (LCA) method. The top-down result ofWrocław’s EFF were 1% greater than the hybrid EFF result, 0.974 and 0.963 gha per person respectively. The result indicated that the EFF exceeded the BC of the city of Wrocław 10-fold. Such assessment support efforts to increase resource efficiency and decrease the risk associated with resources—including food security. Therefore, there is a need to verify if a city is able to satisfy the resource needs of its inhabitants while maintaining the natural capital on which they depend intact. Original article at: https://doi.org/10.3390/resources7030052 © 2018 by the authors. Licensee MDPI.
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Deze publicatie richt zich vooral op het concept Design Based Research,gezien vanuit het perspectief van de bijna 40 lectoren die de hogeschool rijk is. Dit lectoratenoverzicht kan worden beschouwd als een atlas of reisgids waarmee de lezer een route kan afleggen langs de verschillende lectoraten. De lectoraten die actief zijn op het gebied van de Service Economy worden beschreven in hoofdstuk 2. De lectoraten die actief zijn op het gebied van Vitale Regio worden beschreven in hoofdstuk 3. De lectoraten die actief zijn op het gebied van Smart Sustainable Industries worden beschreven in hoofdstuk 4. De lectoraten die actief zijn op het gebied van de hogeschoolbrede thema’s Design Based Education en Research worden beschreven in hoofdstuk 5. Tenslotte wordt er in hoofdstuk 6 een eerste aanzet gedaan om één of meer verbindende thema’s of werkwijzen te ontdekken in de aanpak van de verschillende lectoraten. Het is niet de bedoeling van deze publicatie om een definitief antwoord te geven op de vraag wat NHL Stenden precies bedoelt met het concept Design Based Research. Het doel van deze publicatie is wel om een indruk te krijgen van wat er allemaal gebeurt binnnen de lectoraten van NHL Stenden, en om nieuwsgierig te worden naar meer.
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De transitie van het onderwijs in de foodsector in de Rotterdamse regio
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