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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Coproducten verwaarden
Keijsers, Edwin ; Duinkerken, Gert van - \ 2016
coproduction - food industry - residual streams - waste utilization - animal feeding - feeds - biobased economy - byproducts
Stel, je bent producent in de levensmiddelenindustrie. Van bijvoorbeeld de aardappels die je gebruikt voor chipsproductie blijft een deel ‘onbruikbaar’ product over. Gooi je het weg? Zonde, deze stromen kunnen interessant zijn voor de diervoederindustrie. In de afgelopen jaren is het gebruik van zogenoemde coproducten licht gestegen.
Protocol beoordeling stoffen Meststoffenwet : versie 3.2
Commissie Deskundigen Meststoffenwet, - \ 2016
Wageningen : Wettelijke Onderzoekstaken Natuur & Milieu (WOt-technical report 71) - 70
kunstmeststoffen - afval - wetgeving - protocollen - regelingen - bijproducten - fertilizers - wastes - legislation - protocols - regulations - byproducts
The Fertiliser Act regulates the trade in and use of fertilisers in the Netherlands. Only designated fertiliserscan be traded freely. In general, the Act prohibits the use of wastes and by-products as fertilisers, assecondary raw materials for fertiliser production or for the production, via co-digestion in a biogas productionplant, of digestate destined for use as fertiliser. However, a statutory provision has been adopted thatpermits the use of approved and designated wastes and by-products as fertilisers or as secondary rawmaterials for fertiliser or digestate production. Before wastes and by-products may be designated, they arereviewed to assess their fertilisation value and any environmental risks associated with these uses. Theassessment criteria and evaluation procedures are described in detail in a protocol. The protocol alsodescribes the administrative procedure and summarises the data needed for the review and assessment
Alkaline pretreatments of lignin-rich by-products and their implications for enzymatic degradation
Murciano-Martinez, P. - \ 2016
University. Promotor(en): Harry Gruppen, co-promotor(en): Mirjam Kabel. - Wageningen : Wageningen University - ISBN 9789462576629 - 156 p.
degradation - enzymes - pretreatment - byproducts - lignin - food chemistry - delignification - sugarcane bagasse - degradatie - enzymen - voorbehandeling - bijproducten - lignine - voedselchemie - delignificatie - suikerrietbagasse

The increasing interest in plant biomass based biofuels and chemicals arouses mainly from the increased awareness of a possible finiteness of fuels. The current main challenge to produce such biofuels and biochemicals is economic efficiency, but also knowledge concerning type and effectiveness of both thermally assisted chemical and enzymatic treatments, needed to generate fermentable sugars, is lacking. The subject of this thesis is to gain understanding of the effect of both sulphuric acid and NaOH catalysed pretreatments of sugar cane bagasse and oil palm empty fruit bunches on subsequent enzymatic saccharification, with a focus on the NaOH catalysed pretreatments. The fate of the main polymers present, lignin, cellulose and xylan, was studied and also single-activity xylan degrading enzymes, all from Rasamsonia emersonii, were studied for their mode-of-action.

Development of a lactic acid production process using lignocellulosic biomass as feedstock
Pol, E.C. van der - \ 2016
University. Promotor(en): Gerrit Eggink, co-promotor(en): Ruud Weusthuis. - Wageningen : s.n. - ISBN 9789462576735 - 167 p.
lignocellulose - biomass - biobased chemicals - sugarcane bagasse - lactic acid - sugars - byproducts - inhibitors - pretreatment - bacillus coagulans - furfural - saccharification - fermentation - quantitative techniques - production processes - biomassa - chemicaliën uit biologische grondstoffen - suikerrietbagasse - melkzuur - suikers - bijproducten - remmers - voorbehandeling - versuikering - fermentatie - kwantitatieve technieken - productieprocessen

The availability of crude oil is finite. Therefore, an alternative feedstock has to be found for the production of fuels and plastics. Lignocellulose is such an alternative feedstock. It is present in large quantities in agricultural waste material such as sugarcane bagasse.

In this PhD thesis, lignocellulose is chemically and enzymatically pretreated to depolymerise sugars present in this structure. The released sugar monomers are fermented by micro-organisms to lactic acid, which is a precursor for the bioplastic PLA. In this thesis, it is shown that it is possible to produce lactic acid from lignocellulosic biomass with high yields and high productivities.

Products, by-products and recovered secondary materials from processed animal manure
Ehlert, P.A.I. ; Schoumans, O.F. - \ 2015
Wageningen : Alterra, Wageningen-UR (Alterra report 2668) - 29
animal manures - manure treatment - byproducts - fertilizers - nitrates - recovery - dierlijke meststoffen - mestverwerking - bijproducten - kunstmeststoffen - nitraten - terugwinning
Technieken om dierlijke mest en andere biomassa stromen te verwerken om de waardevolle componenten te benutten krijgen steeds meer de aandacht nu makkelijk winbare ertsen en energiebronnen van fossiele herkomst gelimiteerd raken en er meer en meer aandacht gegeven wordt aan terugdringen van uitstoot van CO2 van fossiele bronnen. Producten van dierlijke mest ressorteren onder diverse stelsels van regels van de Europese Unie. Deze stelsels zijn complex en bevorderen daardoor niet altijd een hergebruik. Dit rapport beschrijft kort welke technologieën er zijn om dierlijke mest te verwerken en welke producten daaruit resulteren. Vervolgens worden Europese wettelijke bepalingen beschreven die op deze producten van toepassing zijn. Deze bepalingen vragen aanpassing aan de nieuwe technologieën voor verwerking van dierlijke mest. Het rapport geeft daarvoor aanbevelingen.
Aanbodanalyse discards demersale visserij
Goudswaard, P.C. ; Reijden, K.J. van der; Verkempynck, R. ; Poelman, M. - \ 2015
IJmuiden : IMARES Wageningen UR (Rapport / IMARES Wageningen UR C100/15) - 24
demersale visserij - waardeketenanalyse - discards - bijproducten - vangstsamenstelling - bijvangst - demersal fisheries - value chain analysis - byproducts - catch composition - bycatch
De aanlandplicht betekent een serieuze verandering voor de demersale visserij. Mogelijkheden voor verwerking en gebruik van discards zijn te vinden in verschillende (bestaande en nog te ontwikkelen) afzetmarkten en sectoren. Dit rapport bevat een aanbodanalyse die een inschatting kan geven van de te verwachten discards die in de Nederlandse havens aangeland gaan worden. Hiermee wordt een eerste stap gezet naar het inzichtelijk maken van de data die nodig is om toekomstige ketenmogelijkheden te ontwikkelen.
De samenstelling van discards in de demersale visserij voor valorisatie doeleinden
Kals, J. ; Poelman, M. ; Goudswaard, P.C. - \ 2015
IJmuiden : IMARES Wageningen UR (Rapport / IMARES Wageningen UR C099/15) - 27
demersale visserij - discards - bijvangst - bijproducten - vercommercialisering - vangstsamenstelling - visvangsten - eu regelingen - voedingswaarde - visproducten - demersal fisheries - bycatch - byproducts - commercialization - catch composition - fish catches - eu regulations - nutritive value - fish products
Vanaf januari 2016 wordt de discard regelgeving vanuit de EU aangepast. Dit betekent dat de sector zich moet committeren aan deze regelgeving. Hierdoor zullen de niet gewenste vangsten die op dit moment nog overboord gaan, aangeland moeten worden. Er is een traject ingezet om de kansen tot valorisatie van de discards te ontwikkelen. In een separaat traject is bepaald welke hoeveelheden van soorten er vanaf 1 januari 2016 vanuit de demersale visserij zullen worden aangeland. In voorliggend technisch rapport wordt deze analyse verder vormgegeven door een beschrijving te geven van de nutritionele waarde van de discards.
Separation of isoflavones form okara : process mechanisms & synthesis
Jankowiak, L. - \ 2014
University. Promotor(en): Remko Boom, co-promotor(en): Atze Jan van der Goot. - Wageningen : Wageningen University - ISBN 9789462570641 - 184
sojaproducten - isoflavonen - extractie - bijproducten - soyabean products - isoflavones - extraction - byproducts

By-product utilisation, more efficient use of resources, and more sustainable processing have become of the utmost importance for society and the food industry. During soymilk production, a by-product called okara is produced in great quantities. Despite being a by-product, okara contains many nutrients, which could be utilised for human consumption. Isoflavones are one example of the components present in soy, which are also found in okara. Isoflavones are a subclass of flavonoids, a group of the many polyphenols that exist, and are believed to have a positive effect in the prevention of hormone related cancers, cardiovascular disease, osteoporosis and obesity. One of the main challenges when extracting isoflavones from okara are their low concentration in okara and the strong water binding capacity of the biopolymer matrix of okara. Besides, isoflavones comprise several classes of components having different properties with respect to for example their solubility. This makes the separation and purification of those components in a cost-efficient manner with a non-toxic solvent route challenging.

The aim of this thesis is to provide insight for the development of a polyphenol separation process on the case of okara. The presence of a partly solid matrix and its impact on the separation process was investigated, and the opportunities and challenges for isoflavone separation from okara are presented in this thesis. By means of this case, the applicability of a process synthesis methodology for separation processes was investigated.

In chapter 2, the use of ethanol and water was investigated as relatively non-toxic solvents for extraction of the isoflavones. High extraction yields were obtained with 50-70% ethanol. However, different optima in the range of 0%-100% ethanol were obtained dependent on the isoflavone group, which highly differ in hydrophobicity. The glucosides had an optimum at 50%-60% ethanol, the malonyl-glucosides between 30% and 60% ethanol, and the aglycone yield increased monotonously with the ethanol concentration. The solvent choice does not just determine the yield of isoflavones in the extract, but also the swelling of the matrix, important for the separation of the solvent and the okara, and the purity in the extract. While finding a good solvent for a range of components is one issue, a second challenge in the utilisation of okara is its high moisture content, because this limits the ethanol concentrations that can be used in the extraction solvent when extracting the crude okara. Nevertheless, the same extraction yields were obtained as with the dried material, which led to the conclusion that drying of the starting material, being an energy intensive operation, should be omitted.

The consequences of using the wet, non-dried okara were evaluated using an exergy analysis. The use of the water in okara poses a challenge if a high fraction of a co-solvent such as ethanol is needed, since that increases the total liquid-to solid ratio. Therefore, we conceptually designed the extraction process and evaluated the efficiency and sustainability of different options (chapter 3). Exergy analysis can quantify and combine effects of solvent consumption and physical energy thermodynamically. In addition, it can indicate the resource efficiency of a process and can be used to compare streams with different solvents such as ethanol and water. Often used for process optimisation, we investigated the use of exergy for process synthesis, which delivered the information for further process design and decision-making. A drying step was found to be less detrimental than an increased solvent use. The use of ethanol, its loss and distillation, and the loss of the extracted residue were identified as the most inefficient steps within the conceptual process, and with this, guidelines were given how to improve the systems sustainability.

The analysis performed in chapter 3 showed that a significant step towards better sustainability is made when ethanol is fully omitted as solvent in the extraction step. Furthermore, it was shown in chapter 2 that part of the isoflavones are rather water soluble due to their glucosidic nature. Therefore, the extraction and solubilisation of isoflavones in water was investigated in detail in chapter 4. Besides, the co-extraction of proteins in the water environment and their effect on the isoflavone extraction was investigated. The temperature did not influence the extraction, but an increased liquid-to-solid ratio and the pH did have a clear influence on the extraction yield. Okara may also contain the less polar aglycones, which are in general not present naturally in the soybeans, but which are products of hydrolysis of the glycosides due to certain processing conditions. The ionisation (dissociation) of the components at higher pH can modify their solubility and interaction with the matrix; therefore, by adjusting the pH the aglycones could be solubilised in water as well.

Further purification based on affinity separation was shown to be more feasible with water as solvent, since a water-ethanol mixture would be such a good solvent that the adsorption on the column would be hindered. The common way of regenerating such components includes the use of another solvent than is used for extraction, leading to an additional evaporation step. The higher affinity of isoflavones in an aqueous environment to a resin, and the possibility to omit an additional preparation step demonstrated the suitability of water as solvent in the primary extraction step: the extracts are more suitable for chromatographic purification, while ethanol or aqueous ethanol could be used as eluent. This demonstrates that it is important not to design a processing step by itself, but to optimise an internally coherent processing system as a whole.

Chapter 5 reports on the adsorption of the isoflavones on polyvinyl polypyrrolidone (PVPP) with special regards to the effect of proteins that are co-suspended in the extract. The adsorption efficiency was only negatively influenced when accounting for the isoflavones that are lost with protein that precipitates at lower pH. The affinity of the isoflavone groups could be described with constant partition coefficients resulting from a simple model. Furthermore, the adsorption of the isoflavones onto PVPP with the entire okara matrix present at floating pH could be described with a model using the partition coefficients describing the affinity to the PVPP and to the matrix. The model suggests that it is possible to ‘pull’ the isoflavones from the okara by concurrent adsorption of the isoflavones to an adsorption resin that is present in the same solution, thus increasing both yield and purity.

The three main isoflavone groups present in okara behave differently throughout the entire study, due to their different properties. The order of their adsorption affinities was the reverse of their water extractability. A more sustainable integrated recovery process can be designed for polyphenolic components, by identifying the right balance between the polarity and hydrophobicity of the component of interest, the solvent, and the adsorbent.

The investigated process synthesis methodology, and the design options that followed by applying this methodology are discussed in detail in chapter 6. A simplified simultaneous extraction-adsorption separation process, which resulted from the process synthesis is presented. Two base case flow diagrams that can be investigated in depths are further discussed in chapter 7.

Since the relevant properties and phenomena underlying the results presented in this thesis are quite generic, they can be translated to other separation processes, and the same approach can be used to develop more sustainable separation processes for polyphenols or other useful compounds from other food-by-products. By using the sustainability and efficiency as a prime objective within process design in combination with a good understanding of the underlying phenomena of the system, a new step in process design can be made: Sustainable process development requires proper understanding of the complex systems we are dealing with, the matrix itself, but also the thermodynamic behaviour of the components, and their behaviour in the matrix and during processing.

Antibiotica in grond en water : via plant weer in mens en dier
Verwer, C.M. ; Smolders, E.A.A. ; Vijver, L.P.L. van de; Eekeren, N.J.M. van; Hospers-Brands, A.J.T.M. ; Marel, A. van der - \ 2013
V-focus 10 (2013)1. - ISSN 1574-1575 - p. 34 - 35.
veevoeder - bijproducten - dierlijke meststoffen - antibioticumresiduen - antibioticaresistentie - risicoschatting - voedselketens - kennisniveau - dierenwelzijn - fodder - byproducts - animal manures - antibiotic residues - antibiotic resistance - risk assessment - food chains - knowledge level - animal welfare
Residuen van antibiotica en resistente bacteriën zijn niet alleen rechtstreeks een risico voor mens en dier, maar kunnen ook via de grond en het oppervlaktewater in planten terechtkomen. Zo kunnen ze indirect ook een risico vormen voor mens en dier. Dit spoor in de voedselketen is in de discussie over het gebruik van antibiotica en de gevolgen hiervan tot nu toe onderbelicht. Bij het Louis Bolk Instituut is een project gestart, waarin de verschillende sporen van overdracht in de voedselketen in kaart gebracht worden en waarin nog aanwezige hiaten in de kennis opgespoord en mogelijk gedicht kunnen worden.
Phosphorus fertilisers from by-products and wastes
Oenema, O. ; Chardon, W.J. ; Ehlert, P.A.I. ; Dijk, K.C. van; Schoumans, O.F. ; Rulkens, W.H. - \ 2012
fosformeststoffen - bijproducten - afval - dierlijke meststoffen - biochar - afvalverwerking - phosphorus fertilizers - byproducts - wastes - animal manures - waste treatment
Kosten-baten analyse van herintroductie van verwerkt dierlijk eiwit in voeders voor pluimvee en varkens in een systeem van volledige kanalisatie = Cost-benefit analysis of reintroduction of processed animal protein in diets for poultry and pigs in a completely channelled production system
Veldkamp, T. - \ 2012
Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 538) - 32
pluimveehouderij - pluimveevoeding - varkenshouderij - varkensvoeding - voer van dierlijke oorsprong - dierlijke eiwitten - bijproducten - slachthuisafval - afvalhergebruik - mengvoer - duurzaamheid (sustainability) - kosten-batenanalyse - reststromen - poultry farming - poultry feeding - pig farming - pig feeding - feed of animal origin - animal proteins - byproducts - slaughterhouse waste - waste utilization - compound feeds - sustainability - cost benefit analysis - residual streams
The costs and benefits of reintroduction of processed animal protein in diets for poultry and pigs in a completely channelled production system have been evaluated. It has to be decided in the discussion on reintroduction of processed animal proteins in feed for poultry and pigs, which tolerance level is allowed with regard to the species-to-species ban. The tolerance level is extremely important for investments to be made by the industry.
Coffee residues utilization
Dam, J.E.G. van; Harmsen, P.F.H. - \ 2010
Wageningen UR - Food & Biobased Research - 75 p.
koffie-industrie - reststromen - bijproducten - nuttig gebruik - koffiepulp - bio-energie - bioraffinage - biobased economy - coffee industry - residual streams - byproducts - utilization - coffee pulp - bioenergy - biorefinery
In opdracht van de KNVKT en Agentschap NL werd door Wageningen UR, Food and Biobased
Research een onderzoek uitgevoerd naar de mogelijkheden om bijproducten die vrijkomen in de
koffieindustrie op een betere manier te benutten. Hiervoor werd een uitgebreide deskstudie
uitgevoerd (hoofdstuk 2 en 3), waarbij een gedetailleerd (engelstalig) verslag van patent en
literatuuronderzoek het uitgangspunt is geweest voor dit rapport. Aanvullend werd informatie
verzameld van relevante internet sites en werden interviews afgenomen bij verschillende
koffiebranderijen om inzicht te krijgen in de restproducten die vrijkomen bij de koffieproduktie
en een inschatting te kunnen maken van de hoeveelheden. Hierbij werden vrijkomende emballage
en productieverliezen niet meegenomen.
Modelling the consequences of increasing bioenergy demand on land and feed use
Banse, M.A.H. ; Tabeau, A.A. ; Meijl, H. van; Woltjer, G.B. - \ 2010
- 9
biobased economy - biobrandstoffen - landgebruik - indirecte veranderingen van landgebruik - bijproducten - voer - modellen - biofuels - land use - indirect land use change - byproducts - feeds - models
The aim of this paper is to show the consequences of a model extension towards the presentation of by-product in the production of biofuels. By-products can be used as a substitute for feed grain use in livestock production. A boost in biofuel production will also show a strong increase in the availability of by-products. To identify the impact of modelling biofuel production with and without presentation of by-products two different model versions have been applied. The simulation results of both model versions show that the EU mandatory blending mandate has a pronounced impact on the markets for grains, oilseeds and sugar but a rather limited impact on production level of aggregated primary agricultural output. The analysis shows that apart from direct effects of an enhanced demand for bioenergy on production and land use, the indirect effects of the EU Biofuel Directive (BFD) dominates. Additional production of biofuel crops within and outside the EU leads to strong indirect land use changes which are partly compensated for a higher availability of feed byproducts of biofuel production
Notitie voor helpdeskvraag flowchart dierlijke bijproducten
Vermeij, I. ; Bosma, A.J.J. - \ 2010
[Lelystad] : Wageningen UR Livestock Research - 5
dierlijke productie - bijproducten - vleesbijproducten - afvalhergebruik - productieprocessen - voedselverspilling - animal production - byproducts - meat byproducts - waste utilization - production processes - food wastage
Dierlijke bijproducten zijn producten afkomstig van dieren die onbedoeld vrijkomen bij dierlijke productie of verwerking, maar toch een positieve waarde hebben of in ieder geval een nuttige toepassing kennen. Dit document biedt inzicht in de stromen en het volume van de verschillende soorten dierlijke bijproducten en waar deze, al dan niet via een bewerking, voor gebruikt/toegepast worden (verbranding, biogas, compost, veevoeder, petfood, cosmetica, etc.).
7a. Evaluation of integrated biorefinery technologies in the sugar industry. 7b. Evaluation of small scale power production vs. grass biorefinery
Meesters, Koen - \ 2010
sugar refining - sugarbeet - byproducts - economic viability - bioenergy - energy cost of production - biobased economy - biorefinery
Ontwikkeling duurzaamheidmaatlat Deel 2 = Development sustainability index co-digestion animal manure with byproducts
Vries, J.W. de; Zwart, K.B. - \ 2010
Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 309) - 9
varkenshouderij - varkens - varkensmest - bijproducten - broeikasgassen - energiebronnen - bio-energie - afvalhergebruik - fermentatie - co-vergisting - bemesting - biobased economy - pig farming - pigs - pig manure - byproducts - greenhouse gases - energy sources - bioenergy - waste utilization - fermentation - co-fermentation - fertilizer application
In this research an existing sustainability index was extended by assessing the climate change and energy production of various combinations of co-digestion of animal manure with two byproducts.
Options for sustainability improvement and biomass use in Malaysia : Palm oil production chain and biorefineries for non-food use of residues and by-products including other agricultural crops
Dam, J.E.G. van - \ 2009
Wageningen : Agrotechnology & Food Sciences Group (Rapport AFSG 1084) - 37
oliepalmen - maleisië - bijproducten - biomassa - duurzaamheid (sustainability) - non-food producten - biobased economy - agro-industriële ketens - bioraffinage - biobrandstoffen - oil palms - malaysia - byproducts - biomass - sustainability - non-food products - agro-industrial chains - biorefinery - biofuels
The Division Biobased Products of the WUR institute A&F was approached by the Dutch Ministry of Agriculture, Nature and Food Quality with a policy support question about the potential of Bio-based economic developments in Malaysia. Malaysia is one of the major international trade partners of the Netherlands. Annually 4.500 – 5.000 million euro’s worth of goods are imported from Malaysia. The Netherlands are Malaysia’s most important trading partner within the EU. The volume of agricultural commodities and especially palm oil products are substantial and the use of biobased resources for the generation of energy or biofuel has created a fierce debate on the sustainability of expansion of use of the biomass resources. In the context of the international policy to support the transition towards a biobased economy the potential resources that can be used for production of materials, chemicals and energy needs to be indentified. This report is reviewing the options that the current Malaysian agro-forestry sector may provide for sustainable developments. The main conclusions are that especially the currently underutilized residues and polluting wastes from the palm oil production have big potential for value addition and technical product development that also could substantially contribute to the reduction of greenhouse gas emissions. Examples can be found in fermentation of residues and effluents to produce bio-gas / ethanol or bioplastics but also fibre boards and building materials. Demonstration on pilot scale of such technologies could create new business and bilateral interactions between Malaysia and The Netherlands.
Ontwikkeling duurzaamheidmaatlat : covergisting van dierlijke mest met bijproducten = Development sustainability index co-digestion animal manure with byproducts
Thomassen, M.A. ; Zwart, K.B. - \ 2008
Lelystad : Animal Sciences Group (Rapport / Animal Sciences Group 184) - 15
varkensmest - bijproducten - broeikasgassen - energie - co-vergisting - biobased economy - pig manure - byproducts - greenhouse gases - energy - co-fermentation
In this research an existing sustainability index was supplemented by assessing the climate change and energy production of various combinations of codigestion of animal manure with by-products
Bijproducten biobrandstoffen
Bondt, N. ; Meeusen-van Onna, M.J.G. - \ 2008
Den Haag : LEI (Rapport / LEI : Domein 3, Natuurlijke hulpbronnen en milieu ) - ISBN 9789086152032 - 43
residuen - industrieel afval - afval - organisch afval - bijproducten - agrarische afvalstoffen - agro-industriële bijproducten - brandstoffen - vetten - technologie - plantaardige vetten - voedselindustrie - drankenindustrie - nederland - economische haalbaarheid - economische evaluatie - rentabiliteit - biobrandstoffen - bioethanol - biobased economy - residues - industrial wastes - wastes - organic wastes - byproducts - agricultural wastes - agroindustrial byproducts - fuels - fats - technology - plant fats - food industry - beverage industry - netherlands - economic viability - economic evaluation - profitability - biofuels
Dit rapport beschrijft de markt van reststromen uit de Nederlandse voedings- en genotmiddelenindustrie, en de aantrekkelijkheid van deze reststromen voor de productie van bioethanol en biodiesel. De eerstegeneratietechnologie kan slechts 29% van de 7,5 miljoen ton reststromen goed omzetten in biobrandstoffen. Als bovendien rekening wordt gehouden met niet-technische criteria blijken er voor bio-ethanol niet of nauwelijks reststromen interessant te zijn. Voor biodiesel kan wel gebruik worden gemaakt van de plantaardige en dierlijke vetten. De economische gevolgen voor onder meer de diervoedersector zijn beperkt. This report examines the market for residues from the Dutch food and beverage industry, and the appeal of these residues for the production of bio-ethanol and biodiesel. The firstgeneration technology is readily suited to the conversion of no more than 29% of the 7.5 million tonnes of residues into biofuels. Moreover, when non-technological criteria are also taken into account virtually none of the residues are of interest for conversion into bioethanol, although vegetable and animal fats can be used to produce biodiesel. The economic consequences for sectors such as the animal-feed sector are limited.
Effect van bijproducten op de slacht- en vleeskwaliteit van vleesvarkens = Effect of food waste products on slaughter and meat quality of growing finishing pigs
Krimpen, M.M. van; Rommers, J.M. ; Binnendijk, G.P. ; Gerrish, P.J. - \ 2006
Lelystad : Animal Sciences Group (PraktijkRapport / Animal Sciences Group, Veehouderij : Varkens ) - 31
karkaskwaliteit - vleeskwaliteit - varkens - slachtdieren - dierlijk vet - bijproducten - brijvoedering - droogvoer - varkensvoeding - carcass quality - meat quality - pigs - meat animals - animal fat - byproducts - wet feeding - dry feeds - pig feeding
Uit literatuuronderzoek en uit deze praktijkmonitoring blijkt dat het verstrekken van gangbare bijproducten de slacht-, vlees- en vetkwaliteit niet negatief beïnvloeden. De vleeskwaliteit van de varkens die brijvoer kregen is in veel opzichten juist beter dan die van de varkens die droogvoer kregen. Zeer opvallend is het lager dripverlies (1,1 %) en een tendens tot een lager kookverlies (0,6%) bij de brijvoergroep, mogelijk als gevolg van de hogere zoutgehalten in het brijvoer
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