Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Tomatenvezel verrijkt papier
    Keijsers, E.R.P. ; Dantuma, Anouk - \ 2018
    Wageningen : Wageningen Food & Biobased Research
    biobased economy - fibres - biobased materials - paper - tomatoes - biomass
    Multiple data sets and modelling choices in a comparative LCA of disposable beverage cups
    Harst, E.J.M. van der; Potting, J. ; Kroeze, C. - \ 2014
    Science of the Total Environment 494-495 (2014). - ISSN 0048-9697 - p. 129 - 143.
    life-cycle assessment - global warming contributions - environmental assessment - greenhouse gases - paper - system - pulp - management - impacts - options
    This study used multiple data sets and modelling choices in an environmental life cycle assessment (LCA) to compare typical disposable beverage cups made from polystyrene (PS), polylactic acid (PLA; bioplastic) and paper lined with bioplastic (biopaper). Incineration and recycling were considered as waste processing options, and for the PLA and biopaper cup also composting and anaerobic digestion. Multiple data sets and modelling choices were systematically used to calculate average results and the spread in results for each disposable cup in eleven impact categories. The LCA results of all combinations of data sets and modelling choices consistently identify three processes that dominate the environmental impact: (1) production of the cup's basic material (PS, PLA, biopaper), (2) cup manufacturing, and (3) waste processing. The large spread in results for impact categories strongly overlaps among the cups, however, and therefore does not allow a preference for one type of cup material. Comparison of the individual waste treatment options suggests some cautious preferences. The average waste treatment results indicate that recycling is the preferred option for PLA cups, followed by anaerobic digestion and incineration. Recycling is slightly preferred over incineration for the biopaper cups. There is no preferred waste treatment option for the PS cups. Taking into account the spread in waste treatment results for all cups, however, none of these preferences for waste processing options can be justified. The only exception is composting, which is least preferred for both PLA and biopaper cups. Our study illustrates that using multiple data sets and modelling choices can lead to considerable spread in LCA results. This makes comparing products more complex, but the outcomes more robust.
    Research news : Competence Centre Paper and Board
    Yilmaz, G. - \ 2008
    papier - karton - samenwerking - onderzoek - biobased economy - paper - paperboard - cooperation - research
    Within Wageningen UR , the research programme Paper and Board co-operates with the Dutch Competence Centre Paper and Board in order to improve the development and exchange of knowledge within the Dutch Paper and Board industry.
    Research news : pulping and bleaching activities
    Keijsers, E.R.P. - \ 2008
    pulpbereiding - papier - bleking - vezels - karton - wetenschappelijk onderzoek - pulping - paper - bleaching - fibres - paperboard - scientific research
    Agrotechnology & Food Sciences Group is an organisation for fundamental and applied scientific research. The research department Fibre and Paper Technology is actively involved in pulping and bleaching research with a wide range of raw materials, including wood, non- wood and recycled fibres.
    Facilities and services : testing facilities, Paper and Board Research at Wageningen UR
    Kamp, R.G.M. op den - \ 2008
    vezels - pulp - papier - karton - testen - technieken - biobased economy - fibres - pulps - paper - paperboard - testing - techniques
    Fibres, pulp, paper and board are analysed for different purposes by standard or specially developed methods.
    Research news : Paper and Board Research
    Yilmaz, G. - \ 2008
    papier - karton - onderzoek - vezels - ruwe grondstoffen - kwaliteit - afvalhergebruik - biobased economy - energiebesparing - proceskunde - paper - paperboard - research - fibres - raw materials - quality - waste utilization - energy saving - process engineering
    Wageningen UR Paper and Board conducts fundamental and applied research to develop new sustainable processes and products in the paper and board area. Our expertise enables us to contribute towards improved process efficiency by more effective use of fibre raw materials, introduction of new chemicals, control of stock preparation and product quality and by reduction of energy and waste formation.
    Scaling of sound emission energy and fracture behavior of cellular solid foods
    Meinders, M.B.J. ; Vliet, T. van - \ 2008
    Physical Review. E, Statistical nonlinear, and soft matter physics 77 (2008)3. - ISSN 1539-3755
    self-organized criticality - acoustic-emission - dynamic fracture - crackling noise - model - precursors - paper - dry
    A detailed study was performed of the fracture behavior of toasted rusk rolls, a cellular solid food, at different water activities and morphologies. We find that the energies of the emitted sound pulses follow Gutenberg-Richter power laws with characteristic exponents b~1.5. The scaling exponents varied only within a range of 0.2 when the method of fracture, humidity, or morphology was changed. However, differences in b were observed, indicating nonuniversal behavior, that seems to be related to morphology and water activity. Also, power law scaling behavior was observed for the waiting time distributions with an exponent a~1.9.
    Options to reduce the environmental impact by eucalyptus-based Kraft pulp industry in Thailand: model description
    Jawjit, W. ; Kroeze, C. ; Soontaranun, W. ; Hordijk, L. - \ 2007
    Journal of Cleaner Production 15 (2007)18. - ISSN 0959-6526 - p. 1827 - 1839.
    biomass - paper
    Kraft pulp industry contributes to several environmental problems, including global warming, acidification, eutrophication, smog, toxicity and the production of solid waste. The objective of this study is to identify options to reduce the environmental pressure caused by Kraft pulp industry in Thailand, and to describe a model that quantifies the environmental impact. The model can be used to evaluate the effects of the options on the environmental impact, and the associated costs. The model includes 14 groups of options to reduce emissions and the production of waste.
    Energy reduction by control of recycled fibre selection and processing
    Dekker, Jocco - \ 2006
    paper - recycling - fibres - selection - drying - biobased economy - energy saving - production processes - refining
    Lactic acid production from xylose by the fungus Rhizopus oryzae
    Maas, R.H.W. ; Bakker, R.R. ; Eggink, G. ; Weusthuis, R.A. - \ 2006
    Applied Microbiology and Biotechnology 72 (2006)5. - ISSN 0175-7598 - p. 861 - 868.
    l(+)-lactic acid - fermentation - physiology - glucose - biomass - paper
    Lignocellulosic biomass is considered nowadays to be an economically attractive carbohydrate feedstock for large-scale fermentation of bulk chemicals such as lactic acid. The filamentous fungus Rhizopus oryzae is able to grow in mineral medium with glucose as sole carbon source and to produce optically pure l(+)-lactic acid. Less is known about the conversion by R. oryzae of pentose sugars such as xylose, which is abundantly present in lignocellulosic hydrolysates. This paper describes the conversion of xylose in synthetic media into lactic acid by ten R. oryzae strains resulting in yields between 0.41 and 0.71 g g¿1. By-products were fungal biomass, xylitol, glycerol, ethanol and carbon dioxide. The growth of R. oryzae CBS 112.07 in media with initial xylose concentrations above 40 g l¿1 showed inhibition of substrate consumption and lactic acid production rates. In case of mixed substrates, diauxic growth was observed where consumption of glucose and xylose occurred subsequently. Sugar consumption rate and lactic acid production rate were significantly higher during glucose consumption phase compared to xylose consumption phase. Available xylose (10.3 g l¿1) and glucose (19.2 g l¿1) present in a mild-temperature alkaline treated wheat straw hydrolysate was converted subsequently by R. oryzae with rates of 2.2 g glucose l¿1 h¿1 and 0.5 g xylose l¿1 h¿1. This resulted mainly into the product lactic acid (6.8 g l¿1) and ethanol (5.7 g l¿1)
    Enzyme technology for improved drainability of recycled paper, PIRA 4 March 2005
    Lips, Steef - \ 2005
    paper - recycling - enzymes - dewatering - biobased economy
    Fibre raw material technology for sustainable paper and board production
    Westenbroek, A.P.H. - \ 2005
    fibres - paper - paperboard - raw materials - recycling - quality - techniques - research - biobased economy
    Reduced energy consumption in/by fibre processing
    Dekker, Jocco - \ 2005
    paper - fibres - selection - drying - biobased economy - energy saving - refining - production processes
    Characterisation of a 1,4-ß-fucoside hydrolase degrading colanic acid
    Verhoef, R.P. ; Beldman, G. ; Schols, H.A. ; Siika-aho, M. ; Ratto, M. ; Buchert, J. ; Voragen, A.G.J. - \ 2005
    Carbohydrate Research : an international journal 340 (2005)11. - ISSN 0008-6215 - p. 1780 - 1788.
    salmonella-typhimurium - escherichia-coli - m-antigen - paper - exopolysaccharide
    A novel colanic acid-degrading enzyme was isolated from a mixed culture filtrate obtained by enrichment culturing of a compost sample using colanic acid as carbon source. The enzyme was partially purified resulting in a 17-fold increase in specific activity. Further purification by Native PAGE revealed that the enzyme is part of a high-molecular weight multi protein complex of at least six individual proteins. The enzyme showed a temperature optimum at 50 °C while after 5 h at 50 °C and pH 7 still 70% of the total activity was left. The pH optimum was found to be pH 7. Analysis of the degradation products showed that the enzyme is a novel 1,4-ß-fucoside hydrolase that liberates repeating units of colanic acid with varying degrees of acetylation. Km and Vmax of the enzyme were determined against the native substrate as well as its de-O-acetylated and depyruvated forms. Compared to the native substrate the affinity of the enzyme for the modified substrates was much lower. However, for the de-O-acetylated sample a dramatic increase in catalytic efficiency was observed. The native form of the substrate showed substrate inhibition at high concentrations, probably due to the formation of nonproductive substrate complexes. Removal of the acetyl groups probably prevents this effect resulting in a higher catalytic efficiency.
    Baanbrekende verpakkingsconcepten van karton
    Reuvers, M. ; Wienk, I. - \ 2005
    Pakblad 27 (2005)3. - ISSN 1389-7381 - p. 10 - 10.
    verpakkingen - recycling - duurzaamheid (sustainability) - innovaties - verpakkingsmaterialen - karton - papier - polymeren - wrappings - sustainability - innovations - packaging materials - paperboard - paper - polymers
    Binnen 35 onderzoekspartners in 13 EU-lidstaten loopt het grootste onderzoek naar duurzame verpakkingen van hernieuwbare grondstoffen (Sustainpack) ooit. Het gaat hierbij voornamelijk om verpakkingen van papier, karton en biopolymeren uit hout- en plantenvezels. Uitleg over de deelprojecten met commentaar van Ingrid Wienk van A&F, projectleider van het deelproject Communicatieve verpakkingen
    How many fibres see the refiner? Amount of changed fibres measured by RBA
    Dekker, Jocco - \ 2005
    fibres - fibre quality - paper - refining - biobased economy - measurement techniques - process engineering - papermaking
    Biotechnological application of enzymes for making paper pulp from green jute/kenaf
    Snijder, M.H.B. ; Lips, S.J.J. ; Maas, R.H.W. ; Kamp, R.G.M. op den; Valk, H.C.P.M. van der; Jong, E. de - \ 2004
    Wageningen : Agrotechnology & Food Innovations (Rapport 93)
    papier - pulpbereiding - jute - kenaf - productieprocessen - biotechnologie - voorbehandeling - enzymen - biobased economy - paper - pulping - production processes - biotechnology - pretreatment - enzymes
    The objectives of the tasks of Agrotechnology & Food Innovation (formerly ATO) in the project are: to determine at laboratory level the best conditions for producing high-yield pulps from whole jute for utilisation in wood containing papers; to test the potential of using recommended enzyme recipes in both extruder and refiner processes in terms of pulp quality, chemicals and energy consumption, brightness and production cost; to evaluate the potential of a micro-biological pre-treatment with selected strains of fungi; to establish process conditions for pilot confirmatory trials.
    Improved level and control of stiffness
    Sinke, R.J. - \ 2004
    paper - sizing - quality - paperboard - applications - properties - biobased economy - production processes
    Optimalisatie stijfheid van papier en karton
    Sinke, R.J. - \ 2004
    Wageningen : Agrotechnology & Food Innovations
    papier - karton - kwaliteit - verbetering - stijven - meettechnieken - biobased economy - paper - paperboard - quality - improvement - sizing - measurement techniques
    Poster met informatie over het project ‘Optimalisatie Stijfheid’. In het project worden verschillende deelonderzoeken uitgevoerd, in kleinere groepen. De resultaten zijn gericht op korte-termijn implementatie bij de bedrijven.
    Aim and technologies for fibre upgrading
    Westenbroek, A.P.H. - \ 2004
    paper - pulp and paper industry - management - recycling - fibres - quality - upgrading - biobased economy
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