PhD theses

All Wageningen University PhD theses

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    Wageningen PhD theses


    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

    Hard copies of all theses are available for loan at WUR Library. To request them, click the link Request this publication in the full record presentation. This is a fee based service.

    mail icon WUR Library, 9 july 2012

     

Records 1 - 20 / 173

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Maximization of sulfur formation in the presence of organic sulfur compounds in a dual bioreactor gas desulfurization system [PhD thesis]
Kiragosyan, Karine \ 2020
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Nutritious ponds : valorising waste using natural production [PhD thesis]
Hermsen, Devi \ 2020
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Towards efficient use of resources in food systems : exploring circular principles and strategies [PhD thesis]
Kernebeek, Heleen van \ 2020
biobased economy - energy sources - biomass - bioenergy - food - food wastes
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Effects of land use and land cover change on the water cycle in the Amazon basin under a changing climate [PhD thesis]
Von Randow, Rita de Cássia Silva \ 2020
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Synergies and trade-offs between yield, quality, resource use efficiency and environmental impact of potato production in China [PhD thesis]
Wang, Na \ 2020
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The state, capital and peasantry in the agrarian transition of China: the case of Guangxi sugarcane sector [PhD thesis]
Zhang, Jin \ 2019
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Wild ungulates as forest engineers [PhD thesis]
Full text publicly available; under embargo until:2021-10-10
Ramírez Chiriboga, Juan Ignacio \ 2019
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Nutrient challenges in global livestock supply chains : an assessment of nitrogen use and flows [PhD thesis]
Uwizeye, Aimable \ 2019
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Land in post-conflict situations : war, decentralization, land governance and state formation In Northern Uganda [PhD thesis]
Kobusingye, Doreen Nancy \ 2018
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Enactment of ‘community’ in community based natural resources management in Zambezi Region, Namibia [PhD thesis]
Lubilo, Rodgers \ 2018
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Crossbreeding and gross national happiness of Bhutanese farmers [PhD thesis]
Samdup, Tashi \ 2018
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Understanding the predictability of the Arctic climate [PhD thesis]
Krikken, Folmer \ 2018
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Active citizenship in green space governance [PhD thesis]
Full text publicly available; under embargo until:2020-11-09
Mattijssen, Thomas \ 2018
citizens - green infrastructure - governance - ecology - nature
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Can we solve it in the workshop? : learning in river restoration and climate policy implementation [PhD thesis]
Rudberg, Peter M. \ 2018
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Optimization of mixing in a Chinese dome digester for tropical regions [PhD thesis]
Jegede, Abiodun O. \ 2018
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Production efficiency of mussel bottom culture [PhD thesis]
Capelle, Jacob J. \ 2017
mussels - mussel culture - bottom culture - efficiency - population dynamics - culture techniques - biomass production - improvement - shellfish culture - aquaculture
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Multi-objective optimization for eco-efficient food supply chains [PhD thesis]
Full text publicly available; under embargo until:2021-01-21
Banasik, Aleksander \ 2017
food chains - supply chain management - food production - mushrooms - decision support systems - production planning - models
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Essays on the political economy of trade and regulation : biotechnology and conservation [PhD thesis]
Shao, Qianqian \ 2017
agricultural trade - genetically engineered foods - food biotechnology - political economy - food products - agricultural production - agricultural products - food technology - food policy - food security
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Navigating obstacles, opportunities and reforms: women’s lives and livelihoods in artisanal mining communities in eastern DRC [PhD thesis]
Bashwira Nyenyezi, Marie Rose \ 2017
livelihoods - livelihood strategies - mining - women - women workers - gender - gender relations - empowerment - congo democratic republic - central africa
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Valorisation of waste streams from by-product to worm biomass [PhD thesis]
Laarhoven, Bob \ 2017
biomass - residual streams - animal nutrition - fisheries - organic wastes - helminths

Abstract:
With an 8 % annual growth rate, aquaculture is the fastest growing food production sector in the world (FAO, 2008). It can only be sustainable if it is supported by a similar increase in feed production. This had led to several developments to reduce and replace the amount of fishmeal/ oil in fish diets by plant based ingredients originating from by-products or from crops specifically cultured for this purpose. Although plant oils and proteins are available in bulk amounts, their application in fish feed is questionable as it induces more pressure on land-use due to increased agricultural production and competes with present use as food or feed. This drives several alternative feed source developments which are based on the use of residual streams. Novel feed ingredients based on residual stream conversion can in general be subdivided into two major classes: Single cell protein, mainly from yeast, microalgae and bacteria. These novel feed ingredients have the potential to be more sustainable than fish and plant based proteins/oils if they can be effectively produced from residual nutrients, waste streams or low value by-products from e.g. food or agro industries.

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