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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Innovatieve technologie in beheer en oogst van houtige biomassa : eindrapportage
Raa, Rik te; Pfau, S. ; Clerkx, A.P.P.M. ; Massop, Hans ; Hissink, H.J. - \ 2017
BTG Biomass Technology Group - 57 p.
bio-energie - biobased economy - biobrandstoffen - hout - biomassa productie - bosbeheer - bioenergy - biofuels - wood - biomass production - forest administration
Botryococcus braunii for the production of hydrocarbons and exopolysaccharides and the role of associated bacteria
Gouveai, João Diogo Guimarães - \ 2017
University. Promotor(en): Rene Wijffels, co-promotor(en): Maria Barbosa; Detmer Sipkema. - Wageningen : Wageningen University - ISBN 9789463436960 - 157
biomass production - algae - algae culture - hydrocarbons - bacteria - biomassa productie - algen - algenteelt - koolwaterstoffen - bacteriën

Microalgae are photosynthetic organisms that are found worldwide in many different aquatic environments and therefore display an immense biological diversity. They are a promising source of many useful polymers that have industrial applications such as food, fuel, material and pharmaceutical. One microalga that has gathered quite a research community is Botryococcus braunii. The reason for its scientific club is the fact it can synthetize long chain hydrocarbons molecules from C20 to C40. These hydrocarbons have been found in oil-shales and tests show that it can be used as aviation fuel. Besides producing hydrocarbons, some strains of B. braunii can produce exopolysaccharides (EPS) composed mainly of galactose and a small fraction of fucose. The EPS has interesting rheological properties for the food industry and potential active compounds that could be used in the pharmaceutical industry .

Like many other microorganisms, microalgae in the natural environment are usually in the presence of bacteria. The presence of bacteria with microalgae can either have a beneficial or an antagonistic effect. For B. braunii little is known about the bacteria community present especially for the EPS producing strain. For that reason, the aim of this thesis was to investigate B. braunii’s associated bacteria with the aim of improving B. braunii’s biomass growth and hydrocarbon and EPS content. In chapter one, we introduced the topic of microalgae as a potential source of sustainable polymers and we introduced the species B. braunii, describing its characteristics and scientific interest. It is also introduced the topic of microalgae and bacteria associations by looking at other studies from literature.

In chapter two, 16 publically available strains of B. braunii were ordered in culture banks and screened for biomass productivity, hydrocarbon and total carbohydrate content. The aim of the study was to identify one or more good strains that displayed high biomass productivity as well as hydrocarbon or total carbohydrate content. In seven strains out of 16 cultivated in 250 mL volume Erlenmeyer flaks, we detected 5 to 42 % content of hydrocarbons of the dry biomass with four strains producing botryococcenes (C30-C34) and three strains producing alkanes (C20-C25). Two strains showed high amounts of EPS content above 50 % per dry biomass. Seven strains comprising of the strains with higher biomass productivity plus the highest hydrocarbons and EPS content, were tested for scalability using bench scale 800 mL volume bubble column reactors. Two strains, AC761 which produces botryococcenes and CCALA778 which produces EPS, were selected as the most promising B. braunii strains for industrial production of hydrocarbon and EPS.

In chapter three, we studied the bacterial community associated with B. braunii. We cultured 12 strains from the initial 16 from chapter 2 and extracted the DNA from samples taken over a time period of 12 days. It was clear from this study that B. braunii hosts a variety of bacterial species and still maintain its growth. The bacteria families Rhizobiaceae, Bradyrhizobiaceae and Comamonadaceae were found in all 12 strains. These families which belong to the phylum Proteobacteria could have an important role regarding B. braunii growth. Each strain displayed a different bacterial community composition but all the strains from the CAEN culture collection clustered near each other suggesting that the algae culture collection could have an influence on the bacterial community composition. Bacteria genus identification based on 16S rRNA gene amplicon similarity showed several genera present including Rhizobium spp. and Variovorax spp.. Two genera were found that are possibly linked to hydrocarbon degradation: Sphingomonas spp. and Rhodobacter spp..

In chapter four, we investigated further B. braunii CCALA778 which was shown in chapter 2 to accumulate high amounts of EPS. We investigated the effects of antibiotics on algal growth, EPS accumulation and bacterial community composition of CCALA778. Taxonomical identification by 16S rRNA gene analysis indicated that most of the bacteria present with CCALA778 were Gram-negative. Of all antibiotics and antibiotic mixes, only the treatment with Penicillin did not affect the growth of B. braunii. The remaining antibiotics halted the growth of CCALA778 while they were active. The exceptions were with the antibiotics Chloramphenicol, Gentamycin and Linezolid which permanently ceased the growth of CCALA778. The accumulation of EPS seemed to be related to biomass growth, but we did also observe a reduction of EPS with the cultures treated with Penicillin suggesting that bacteria could have an effect on the EPS content. Antibiotics had specific effects on the bacterial community with all treatments showing significant changes over time. The most efficient treatment in removing bacteria were the mixes Metronidazole-Rifampicin-Penicillin and Penicillin-Rifampicin which were the only treatments to show significant changes in the bacterial community when compared to the untreated cultures after 10 days of cultivation. Antibiotics and antibiotic mixes can create changes in the bacterial community but it is unlikely that they alone can lead to axenic B. braunii cultures.

In chapter five, we used Ultra Violet-C light (UVC) to reduce bacteria diversity and abundance present in B. braunii CCALA778. UVC is highly effective in inactivating bacteria and for that reason is being investigated further in medicinal applications. After applying the UVC to B. braunii CCALA778, we were able to reduce the relative abundance of 16S rRNA genes assigned to bacteria to less than 1 % compared to the 70% in the non-treated cultures. With the UVC treated CCALA778 we observed several physiological changes. The UV treated cultures with reduced bacterial load showed nearly double the EPS accumulation when compared to the untreated. To confirm that we did not see an artefact in our results due to the UVC treatment, UVC treated cultures were also inoculated with bacteria from the untreated and we observed a reduction of EPS similar to what we saw with the untreated cultures. There were no changes to the EPS composition after the removal of the bacteria. Other physiological changes were observed, namely that colony size of B. braunii CCALA778 significantly increased when compared to the untreated culture and the UV treated with bacteria. We hypothesise that the increase in colony size was probably due to the fact there was more EPS accumulated which helped with cell aggregation. We also observed an increase on the biomass growth in the UV-treated CCALA778 which we hypothesized being related to the fact that there was none or hardly any competition for essential micronutrients such as phosphate. From this study we concluded that the associated bacteria present with B. braunii CCALA778 were antagonistic. We believe the reason why the bacteria were antagonistic is because of the readily available EPS which is a rich source of organic compounds that bacteria could use for their own proliferation allowing them to compete with B. braunii for essential nutrients.

In chapter 6, we discuss the implications from our previous 4 experimental chapters. The aim of the study was to improve the biomass productivity and hydrocarbon and EPS content of the microalgae B. braunii. In brief, B. braunii displayed a wide range of physiological traits regarding biomass productivity and hydrocarbon and total carbohydrate content. We showed that B. braunii can co-habit with a wide range of bacteria diversity and abundance and that the associated bacteria were antagonistic to CCALA778 by affecting its biomass growth. We also showed that by removing the associated bacteria we can increase the EPS accumulation. Currently most of the research on microalgae and bacteria interactions, focus on the positive side, but we must understand also how bacteria can be antagonistic to microalga growth. Bacteria can be antagonistic to microalgae by competing for nutrients and also being detrimental to industrial process by degrading the product of interest in the case of organic carbons such as EPS. Therefore it is unlikely we can use the benefits that bacteria can provide such as enhancing growth to improve the cultivation of B. braunii and other similar microalgae species that secrete EPS. Since bacteria can be antagonistic to microalgae that secrete large amounts of organic compounds such as EPS, it is imperative to minimize contamination in large scale photobioreactors (PBR). It is important because in large scale PBR, contamination can occur leading to downtime of the reactors. If microalgae industry is to advance, it must develop PBR units that prevent contamination of bacteria from the surrounding environment.

AQUAFARM van zuiveren naar oogsten
Verdonschot, P.F.M. - \ 2017
Aquafarm NL
afvalwater - waterzuivering - industriële grondstoffen - biobased economy - afvalwaterbehandeling - aquacultuur - biomassa productie - waste water - water treatment - feedstocks - waste water treatment - aquaculture - biomass production
Aquafarm ziet afvalwater als basis voor het produceren van hoogwaardige bouwstoffen, waarmee tegelijkertijd het water gezuiverd wordt.
Production efficiency of mussel bottom culture
Capelle, Jacob J. - \ 2017
University. Promotor(en): Aad Smaal; P.M.J. Herman, co-promotor(en): Jeroen Wijsman. - Wageningen : Wageningen University - ISBN 9789463430869 - 240
mussels - mussel culture - bottom culture - efficiency - population dynamics - culture techniques - biomass production - improvement - shellfish culture - aquaculture - mossels - mosselteelt - bodemcultuur - efficiëntie - populatiedynamica - kweektechnieken - biomassa productie - verbetering - schaal- en schelpdierenteelt - aquacultuur

Mussel bottom culture is an extensive type of aquaculture; it depends on natural resources for feed, seed and space. It consists of the translocation of seed from natural beds to designed culture areas, where mussel farmers try to improve production efficiency. Production efficiency is measured by the relative biomass production (RBP) expressed as units of biomass harvested from one unit of biomass seeded, it increases with mussel growth and decreases with mussel mortality. Mussel bottom culture makes use of nature and also depends on nature. Cultured mussels are subject to similar environmental factors that influence growth and mortality on natural mussel beds, with additional effects of anthropogenic factors. In this thesis we focus on dynamics of mussel beds and the impact and effectivity of culture activities on mussel production yield. The major objectives are stated as: (1) to better understand the population dynamics of subtidal mussel populations, (2) to analyze what factors determine production efficiency in mussel bottom culture and how this can be improved. On natural mussel beds mussels organise in patterns that enhance food delivery and resilience of the bed. On culture plots mussels are seeded in concentric seeding patterns. Seeding techniques concentrate mussels locally within the culture plot area, resulting in high local mussel densities; this increases competition and limits the spatial re-organisation of mussels in the bed. Consequently, seeding on culture plots is followed by a large size and density dependent seeding loss that ranges from about 40% for seed from fishery to 69% for smaller SMC seed. This loss was the major factor in determining the maximum RBP. Losses in the grow-out stage were substantially lower, a subsequent density dependent loss was found for smaller mussels (<30 mm), and a non-density dependent loss for larger mussels (>30 mm). Shore crab predation is an important factor contributing to the higher losses at seeding. The effect of shore crab predation on mussel biomass production is higher than expected from previous studies. In an experiment on an intertidal culture plot in the Oosterschelde (NL), we observed that shore crab predation peaks directly after seeding and accounted for 33% of the total losses within five weeks after seeding. Spatial patterns in the survival rates of natural mussel beds in the Wadden Sea show better seed survival in areas with intermediate salinity (mean annual salinity 17.5-22.5 mg l-1). This suggests that mussel survival is negatively related to sea star distribution, which is largely controlled by salinity. Natural beds that escape predation are found at lower salinities and mussels on these beds showed low growth rates, also because of a lower food quality in these areas. Mussel culture strongly affects the population dynamics of the subtidal mussel population, through relaying of mussels from natural mussel beds to culture plots. Culture plots are located in more saline regions of the Wadden Sea (mean annual salinity 25.8 mg l-1), compared to natural mussel beds. This activity increased mussel growth and survival because food quality on culture plots is high and predation is prevented. As a result, average biomass production is higher on culture plots than on natural mussel beds and this difference increases over time. A more efficient seed use on the available area, that can be obtained by reducing seeding losses will increase RBP, maximum biomass production and increases maximum profit. Our results suggest that this can be achieved by seeding homogeneously in low densities.

Martin Scholten College : Biobased economy
Scholten, M.C.T. - \ 2017
Wageningen University & Research
biomass - biomass production - biobased economy - biobased materials - renewable resources - sustainable development - biomassa - biomassa productie - materialen uit biologische grondstoffen - vervangbare hulpbronnen - duurzame ontwikkeling
Martin Scholten talks about the challenges of achieving a more biobased economy
SPARK-UP; Seaweed Production And Refining of Kelp, Ulva and Palmaria : 2013-2016
Wald, J. ; Visser, W. de; Brandenburg, W.A. ; Jongschaap, R.E.E. ; Werf, A.K. van der; Deelman, Berth-Jan ; Helmendach-Nieuwenhuize, Carola - \ 2016
Plant Research International - 144 p.
seaweeds - biobased economy - seaweed culture - biomass production - biomass conversion - aquatic biomass - biorefinery - seaweed products - applications - applied research - cropping systems - marketing channels - zeewieren - zeewierenteelt - biomassa productie - biomassaconversie - aquatische biomassa - bioraffinage - zeewierproducten - toepassingen - toegepast onderzoek - teeltsystemen - marketingkanalen
In het SPARK-UP project, waarin de partners Arkema, PRI-WUR en North Seaweed samenwerkten aan de ontwikkeling van toepassing van zeewier in de biobased economy, is de afgelopen jaren veel werk verzet. In een bassin op het terrein van Arkema, heeft PRI een teeltsysteem opgezet en in gebruik genomen, om onder gecontroleerde omstandigheden zeewier te telen in Westerscheldewater dat in het bassin was ingenomen. Arkema heeft gewerkt aan de raffinage van wieren, met name gericht op de suikers. North Seaweed heeft zich geconcentreerd op het ontwikkelen van businesscases van geraffineerde eiwitten en alginaten uit zeewier en bij het gebruik van de hele wieren als plantversterkers.
Groen proceswater: zuivering brouwerijprocesafvalwater met microalgen
Dijk, W. van; Weide, R.Y. van der; Kroon, A. - \ 2016
Lelystad : ACRRES - Wageningen UR (PPO 721) - 42 p.
brouwerij-industrie - brouwerijafvalwater - afvalwater - afvalwaterbehandeling - waterzuivering - algen - biomassa - biomassa productie - afvoerwater - flotatie - algenteelt - brewing industry - brewery effluent - waste water - waste water treatment - water treatment - algae - biomass - biomass production - effluents - flotation - algae culture
In 2012 is het project Groen Proceswater gestart. Hierin worden de mogelijkheden van zuivering van brouwerijprocesafvalwater met behulp van microalgen onderzocht. Dit is gedaan in een samenwerkingsverband van Heineken Nederland BV, Algae Food & Fuel en WUR-ACRRES. De resultaten behaald in 2012 en 2013 zijn beschreven in afzonderlijke rapporten. In dit rapport zijn de resultaten van 2014 en 2015 beschreven. In 2014 is onderzocht of een voorbehandeling van het proceswater via cavitatie-flotatie het zuiveringsresultaat kan verbeteren en in 2015 of de energie-input van de LEDbelichting kan worden verminderd door te flashen (afwisselende licht-donker periodes op microseconde tijdschaal). Verder is in 2015 en 2016 via een literatuurstudie gekeken naar de verwaarding van de geproduceerde algenbiomassa en zijn de conclusies van het gehele project samengevat.
Assessing the case for sequential cropping to produce low ILUC risk biomethane : final report
Peters, Daan ; Zabeti, Masoud ; Kühner, Ann-Kathri ; Spöttle, Matthias ; Werf, Wopke van der; Stomph, Jan - \ 2016
Utrecht : ECOFYS Netherlands - 39
methane - biofuels - sequential cropping - farmers' associations - biogas - ancillary enterprises - farm management - agricultural energy production - transport - biobased economy - fuel crops - biomass production - methaan - biobrandstoffen - estafetteteelt - boerenorganisaties - nevenactiviteiten - agrarische bedrijfsvoering - energieproductie in de landbouw - brandstofgewassen - biomassa productie
In recent years and especially since the COP - 21 climate agreement reached in Paris last year, efforts to mitigate climate change accelerate. All sectors need to contribute in order to achieve the well below 2 degree climate target. The agricultural sector is relevant for climate change in various ways. Like the agricultural sector, the transport sector is also responsible for significant greenhouse gas emissions. Advanced biofuels and biogas produced from wastes and residues can play an increasingly important role in the transport mix. In Italy, 600 Italian farmers are organised in the Italian Biogas Council (Consorzio Italiano Biogas e Gassificazione, CIB). Some years ago, CIB members developed a concept that they coined Biogasdoneright. In collaboration with various research institutes they seeked for a way to combine biogas feedstock production with crop production for food and feed as a way to generate additional income in a sustainable manner. The core of the Biogasdoneright concept is that farmers apply sequential cropping by growing a winter cover crop on land that was previously fallow during winter time, while maintaining the main crop production during summer time as previously. Multiple claims can be made about Biogasdoneright, for example related to the large potential role for biogas in our future energy system. This project focussed on the most relevant claims related to the use of biomethane in transport, with a focus on sustainability aspects.
Biobased Economy: Algen, het groene goud
Barbosa, M.J. - \ 2016
Wageningen : Wageningen University & Research
algenteelt - algen - biomassa productie - teeltsystemen - cultuurmethoden - biobased economy - algae culture - algae - biomass production - cropping systems - cultural methods
De wereldbevolking groeit en daarmee ook de behoefte aan energie, chemicaliën, en producten zoals plastic, zeep, schoonmaakmiddelen, verf en lijm. Om daarin te kunnen voorzien, moeten we overstappen naar een economie, waarin we de grondstoffen voor deze producten uit duurzame, hernieuwbare bronnen halen. Een voorbeeld van een van de meest duurzame oplossingen zijn micro-algen. Maria Barbosa van Wageningen University & Research vertelt er alles over.
Methodologies identification and certification of Low ILUC risk biofuels : final report
Peters, Daan ; Spöttle, ; Hähl, Thomas ; Kühner, Ann-Kathrin ; Cuijpers, Maarten ; Stomph, Tjeerd Jan ; Werf, Wopke van der; Grass, Martin - \ 2016
Utrecht : ECOFYS Netherlands - 58
biofuels - greenhouse gases - land use - biomass - biomass production - biobased economy - indirect land use change - biobrandstoffen - broeikasgassen - landgebruik - biomassa - biomassa productie - indirecte veranderingen van landgebruik
Biofuels can be an important instrument to decarbonise the transport sector. However, the greenhouse gas performance of biofuels can be negatively impacted by Indirect land use change (ILUC) effects. In this report, Ecofys proposes two methodologies to identify and demonstrate low ILUC risk biofuel feedstock production through the application of yield increase (see Chapter 3) or unused land (see ILUC mitigation methodology for unused land).
Ionic liquid pre-treatment of microalgae and extraction of biomolecules
Desai, Rupali K. - \ 2016
University. Promotor(en): Michel Eppink; Rene Wijffels. - Wageningen : Wageningen University - ISBN 9789462579804 - 126
salts - liquids - fractionation - extraction - hydrophobicity - algae - biomass production - zouten - vloeistoffen (liquids) - fractionering - extractie - hydrofobiciteit - algen - biomassa productie

Liquid-liquid extraction (LLE) techniques are widely used in separation primarily due to ease of scale up. Conventional (LLE) systems based on organic solvents are not suitable for extraction of fragile molecules such as proteins as it would result in denaturation. On the other hand aqueous biphasic system though suitable for extraction of proteins they are restricted by limited polarity range. Ionic liquids are salts which are liquid at room temperature. Ionic liquids have gained interest in extraction over the past years due to its non-volatility and tunable property. In this thesis we explored the feasibility of using two ionic liquid based systems for extraction: 1) Ionic liquid based aqueous two phase system for extraction of microalgae proteins and 2) ionic liquid based emulsions for separation of hydrophilic (e.g. proteins) and hydrophobic (e.g. pigments) components from complex biomass such as microalgae. Additionally the influence of IL pre-treatment on microalgae cell walls and subsequent fractionation of its components (e.g. proteins, pigments, lipids) was also investigated.

Algae production pilot open ponds Lelystad : Results 2013 - 2015
Dijk, W. van; Weide, R.Y. van der; Gennep, Coen van - \ 2016
Lelystad : ACRRES - Wageningen UR (PPO rapport 583) - 63 p.
algae culture - biomass production - aquatic biomass - yields - pilot projects - growout ponds - cropping systems - biobased economy - algenteelt - biomassa productie - aquatische biomassa - opbrengsten - proefprojecten - groeivijvers - teeltsystemen
In 2012 two open microalgae ponds (one indoor and one outdoor, both 250 m2) were built at the ACRRES pilot site in Lelystad. Both ponds are connected to an anaerobic digester and utilise excess heat and flue gas (CO2) from the Combined Heat and Power unit (CHP). In this report the results of the algae production monitoring and the additional experiments are given for the period 2013-2015.
Pilotproef algengroei op geïnundeerd perceel : Onderzoek op een praktijkbedrijf in de Wieringermeer naar de mogelijkheden om algen te kweken op perceel dat in zomer en najaar wordt geïnundeerd ter bestrijding van schadelijke aaltjes
Hoek, H. ; Weide, R.Y. van der - \ 2016
Lelystad : ACRRES - Wageningen UR (PPO 709) - 25 p.
algenteelt - biomassa productie - inundatie - gewasbescherming - proefprojecten - veldproeven - akkerbouw - biobased economy - algae culture - biomass production - flooding - plant protection - pilot projects - field tests - arable farming
Maatschap Hoorsman uit Wieringerwerf heeft enkele jaren ervaring met inundatie van percelen ter bestrijding van (aardappelcyste)aaltjes, waarbij wordt geïnundeerd met water uit het IJsselmeer. Daarbij was het opgevallen dat gedurende het seizoen in het inundatie water algengroei kan ontstaan. Algen kunnen eventueel geoogst worden en zouden daarna wellicht kunnen dienen als veevoer of als bron van andere producten. In een kleine pilotproef is in 2015 op een geïnundeerd perceel van Hoornsman nagegaan of er in het inundatie water substantiële algengroei plaatsvind en om welke algen het gaat. Daarbij zijn de van nature aanwezige algensoorten aangevuld (“aangeënt”) met algensuspensie van Chlorella spp. die op het PPO-agv is gekweekt.
Klinkende munt slaan uit natuur vergt gerichte aanpak
Heide, C.M. van der; Borgstein, M.H. ; Hendriks, C.M.A. - \ 2016
Tijdschrift Milieu : Vereniging van milieuprofessionals 22 (2016)3. - p. 18 - 19.
natuurbeheer - ecosysteemdiensten - natuurgebieden - financieren - biomassa productie - recreatie - waterzuivering - noordwest-overijssel - nature management - ecosystem services - natural areas - financing - biomass production - recreation - water treatment
Met hun natuurterreinen hebben natuurorganisaties potentieel een groot kapitaal in eigendom. Via talloze ecosysteemdiensten kan de samenleving immers de vruchten van al dit natuurlijk kapitaal plukken, denk aan waterzuivering, koolstofopslag, beleving en biomassa. Ondanks hun waardevolle karakter zijn de meeste van die baten gratis, zonder dat daar inkomsten tegenover staan. Onderzoek in de Weerribben-Wieden maakt duidelijk dat een gerichte aanpak nodig is om klinkende munt te slaan uit natuurgebieden.
Bedrijfseconomisch perspectief de maat genomen
Burg, S.W.K. van den; Rood, G.A. ; Lienen, Frederiek van; Veldhuis-van Essen, C. - \ 2016
Tijdschrift Milieu : Vereniging van milieuprofessionals 22 (2016)3. - p. 30 - 32.
agro-ecosystemen - zeewierenteelt - voedselproductie - biomassa productie - ecosysteemdiensten - financieren - bedrijfseconomie - agroecosystems - seaweed culture - food production - biomass production - ecosystem services - financing - business economics
Het concept natuurlijk kapitaal maakt de maatschappelijke waarde van de goederen en diensten waarin de natuur voorziet zichtbaar. Maar is dit concept ook bruikbaar bij de ontwikkeling van sluitende verdienmodellen? Bij een bedrijfseconomische toepassing staan drie aandachtspunten centraal: de kosten van het gebruik van natuurlijk kapitaal in vergelijking tot concurrerende aanpakken, de mogelijkheid om de waarde van ecosysteemdiensten daadwerkelijk te verzilveren, en de bereidheid van afnemers en consumenten om te betalen voor de verbetering van ecosysteemdiensten.
Financiering van bestaande natuur : praktijkcasus ‘Weerribben-Wieden’
Heide, C.M. van der; Hendriks, C.M.A. ; Borgstein, M.H. - \ 2016
Wageningen : LEI Wageningen UR (LEI rapport 2016-056) - ISBN 9789462578111 - 43 p.
natuurbeheer - natuur - kapitaal - natuurbescherming - nationale parken - financieren - landschapsbeheer - landschapsbescherming - natuurlandschap - noordwest-overijssel - nederland - ecosysteemdiensten - biomassa productie - nature management - nature - capital - nature conservation - national parks - financing - landscape management - landscape conservation - natural landscape - netherlands - ecosystem services - biomass production
Nature organisations possess a large amount of natural capital thanks to their nature sites. The value of this capital is extremely important for the organisations themselves and in particular for society as a whole. Natural capital provides numerous ecosystem services from which people benefit, such as water purification, carbon storage, pollination and biomass. The question in this instance is how nature organisations can generate more financial resources from their nature sites in order to maintain and protect their natural capital. After all, although these services are very valuable, most of these benefits are free and do not produce any income. A case study in De Weerribben-Wieden National Park in the north of the Netherlands clearly demonstrates how an area-oriented approach involving innovative revenue models is required if nature sites are to produce sufficient income. That said, without the commitment and a shared sense of urgency from stakeholders in the area, new finance mechanisms that are intended to conserve and the characteristic landscape have little chance of success. In light of this, the challenge for this region is to build a perspective that has the stakeholders’ confidence and that encourages them to cooperate in order to benefit from the opportunities that monetisation offers.
Purifying manure effluents with duckweed
Timmerman, M. ; Hoving, I.E. - \ 2016
Wageningen UR Livestock Research (Livestock Research rapport 942) - 27 p.
animal manures - effluents - lemna - aquatic weeds - feeds - nutrients - ingredients - animal feeding - animal nutrition - waste water - biogas - biomass production - cultivation - biobased economy - dierlijke meststoffen - afvoerwater - schadelijke waterplanten - voer - voedingsstoffen - ingrediënten - diervoedering - diervoeding - afvalwater - biomassa productie - teelt
The objective of this study was to perform a short literature survey to provide information about purifying manure effluents with duckweed with regard to varieties, cultivation, harvesting methods, utilization and valorisation of duckweed. The results of the study show that duckweed can be used to recuperate nutrients from manure effluents and that the concerning duckweed can be utilized as a source of feed, energy and ingredients
Aquatische biomassa, het verwaarden van waterige reststromen op lokaal niveau : Technisch deelrapport 1: Verkenning van de mogelijkheden van reststromen en aquatische biomassa
Huurman, Sander ; Weide, R.Y. van der - \ 2015
Lelystad : PPO AGV (Rapport / PPO-AGV 650) - 54 p.
afvalwateraquacultuur - aquatische biomassa - biomassa productie - afvalwaterbehandeling - haalbaarheidsstudies - reststromen - biobased economy - wastewater aquaculture - aquatic biomass - biomass production - waste water treatment - feasibility studies - residual streams
Het verwaarden van lokaal geproduceerde waterige reststromen door middel van aquatische biomassa is onderdeel van de PPS Kleinschalige bioraffinage (WP5). In dit deelrapport is een overzicht van een aantal in Nederland aanwezige waterige reststromen weergegeven. Een aantal van deze reststromen is ingezet in een microalgen well-plaat screeningtest om de biomassa ontwikkeling op deze stromen te onderzoeken. Op het vlak van het gebruik van aquatische biomassa zijn er een aantal samenvattingen van rapporten en literatuurstukken opgenomen in dit rapport. Ook is er een overzicht van de verschillende soorten aquatische biomassa en de mogelijke toepassing van deze biomassa op reststromen weergegeven. Als voorbeeld is de productie van verschillende soorten biomassa op effluent van een RWZI is gebruikt om een mogelijke verwaarding van componenten uit de biomassa weer te geven. De hoofdconclusie uit dit rapport is dat in Nederland op lokaal niveau diverse reststromen met uiteenlopende samenstellingen en volumes voorkomen. De inzet van aquatische biomassa om reststromen te ontdoen van nutriënten en afvalstoffen kan succesvol toegepast worden. Dit wordt vaak ‘effluent polishing’ genoemd. Het daadwerkelijk verwaarden van aquatisch biomassa gekweekt op reststromen is nog beperkt succesvol.
AlgaePARC (Wageningen UR) : Productiekosten met factor 10 terugdringen
Wijffels, R.H. ; Rees, B. van - \ 2015
algae - algae culture - production costs - test rigs - research projects - biobased economy - biomass production - algen - algenteelt - productiekosten - testinstallaties - onderzoeksprojecten - biomassa productie
In 2011 opende Wageningen UR het AlgaePARC, een proeffaciliteit waar bedrijven en bedrijven samen werken aan het ontwikkelen en opschalen van productiemethoden van algen. Begin oktober blikte AlgaePARC terug op de afgelopen vier jaar en onthulde de ambitie voor de komende jaren: een verlaging van de kostprijs met een factor 10 ten opzichte van 2011.
A new role for forests and the forest sector in the EU post-2020 climate targets
Nabuurs, G.J. ; Delacote, Philippe ; Ellison, David ; Hanewinkel, Marc ; Lindner, Marcus ; Nesbit, Martin ; Ollikainen, Markku ; Savaresi, Annalisa - \ 2015
European Forest Institute (From Science to Policy 2) - ISBN 9789525980202 - 30 p.
forestry - environmental policy - land use - european union - carbon sequestration - forests - biomass production - biobased economy - bosbouw - milieubeleid - landgebruik - europese unie - koolstofvastlegging - bossen - biomassa productie
We are living in a time of accelerated changes and unprecedented global challenges: energy security, natural resource scarcity, biodiversity loss, fossil-resource dependence and climate change. Yet the challenges also demand new solutions and offer new opportunities. The cross-cutting nature of forests and the forest-based sector provides a strong basis to address these interconnected societal challenges, while supporting the development of a European bioeconomy. The |European Forest Institue is an unbiased, science-based international organisation that provides the best forest science knowledge and information for better informed policy making. EFI provides support for decision-takers, policy makers and institutions, bringing together cross-boundery scientific knowledge and expertise to strengthen science-policy dialogue.
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