Searched for: contributor:"Witkamp, G.J. (promotor)"
(1 - 20 of 45)

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Yu, M. (author)
During the past few decades, numerous protein-based pharmaceuticals to treat chronic and life-threatening diseases have emerged. The short plasma half-life of therapeutic proteins requests frequent administration, usually via parenteral routes. This short-coming is proposed to be solved by the development of an injectable microparticulate drug...
doctoral thesis 2019
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Suresh Kumar, P. (author)
Eutrophication and the resulting formation of harmful algal blooms causes huge economic and environmental damages. Phosphorus (P) has been identified as a major limiting nutrient for eutrophication. Phosphorous concentration greater than 100 µg P/L is usually considered high enough for causing eutrophication. The strictest regulations however...
doctoral thesis 2018
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Wilfert, P.K. (author)
The scope of this thesis was to lay the basis for a phosphate recovery technology that can be applied on sewage sludge containing iron phosphate. Such a technology should come with minimal changes to the existing sludge treatment configuration while keeping the use of chemicals or energy as small as possible. The research focused on...
doctoral thesis 2018
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Lu, X. (author)
During the last decades, the consumption of raw materials and energy in the world has faced a tremendous increase with a corresponding industrial waste volume increases, which treatment poses serious challenges. From an economical point of view, the waste has values as it contains valuable matters. Disposal of these streams without any further...
doctoral thesis 2014
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Salvador Cob, S. (author)
Nanofiltration (NF) and reverse osmosis (RO) membranes are used to produce clean water, but also produce a concentrate stream which contains most of the contaminants. Discharging concentrate streams to the environment is hindered by regulations, which are becoming more strict, and by the desire of recovering every single valuable atom. Therefore...
doctoral thesis 2014
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Sutanto, S. (author)
Fabrics that are sensitive to water, may wrinkle or shrink when washed in regular washing machines and are usually cleaned by professional dry cleaners. Dry cleaning is a process of removing soils from substrate, in this case textile, using a non-aqueous solvent. The most common solvent in conventional dry cleaning is perchloroethylene (PER)....
doctoral thesis 2014
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Janssen, C.H.C. (author)
doctoral thesis 2013
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Kazemi, S. (author)
Traditional chemical processes show shortcomings caused by using volatile organic compounds as solvents during reactions and separations. Therefore, it is necessary to address this issue by moving toward more environmentally friendly processes. This is possible by using less toxic and hazardous solvents, such as ionic liquids and supercritical...
doctoral thesis 2013
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Wagterveld, R.M. (author)
Scaling comprises the formation of hard mineral deposits on process or membrane equipment and calcium carbonate is the most common scaling salt. Especially in reverse osmosis (RO) membrane systems, scale formation has always been a serious limitation, causing flux decline, membrane degradation, loss of production and elevated operating costs. In...
doctoral thesis 2013
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Boels, L. (author)
In reverse osmosis (RO) desalination processes, the use of phosphonates prevents scaling, thus allowing for a higher product water recovery, which increases the efficiency of the process. However, a major concern associated with their use in RO desalination is the high cost and environmental impacts associated with the discharge of the waste...
doctoral thesis 2012
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Bakker, T.W. (author)
Vibration and cavitation can be generated in many ways and serve many useful purposes. This study describes physical aspects of useful vibration and cavitation for a broad spectrum of applications at atmospheric or elevated pressures. After a review of available devices, hydrodynamic vibrating-body-in-pipe tools as described in patents by...
doctoral thesis 2012
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Waly, T.K.A. (author)
doctoral thesis 2011
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Perrotin-Brunel, H. (author)
This thesis concerns the production of natural compounds from plant material for pharmaceutical and food applications. It describes the production (extraction and isolation) of cannabinoids, the active components present in cannabis. Many cannabinoids have medicinal properties but not all cannabinoids are available in the (large) quantities...
doctoral thesis 2011
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Nugteren, H.W. (author)
Minerals that are extracted from the earth’s crust to be directly used for their properties are called industrial minerals. This research shows that such minerals can also be produced from industrial residues, hence the name secondary industrial minerals. In this thesis coal fly ash is chosen as one of the industrial residues to work with. Since...
doctoral thesis 2010
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Van Spronsen, J. (author)
Most chemical processes involve solvents in the reaction and the separation step. These solvents give rise to a heavy environmental and economical burden. Moreover, these solvents are based on non-sustainable resources like petroleum. The aim of this thesis has been to develop a number of alternative processes based upon green (sustainable)...
doctoral thesis 2010
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Harinck, J. (author)
The next generation of thermodynamic power cycles offers great potential as the conceptual basis for sustainable energy converters. Examples are the supercritical and superheated Organic Rankine cycle, the transcritical condensation cycle, the supercritical Brayton cycle, the Organic Stirling cycle and the transcritical vapor compression cycle....
doctoral thesis 2010
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Mohamad Sabil, K. Bin (author)
In view of the possibilities for new development of carbon dioxide hydrate processes, this study focused on experimental measurements to obtain fundamental insight into the phase behaviour and the kinetic of formation of carbon dioxide hydrate forming systems. These data are essential for the development of process design of any carbon dioxide...
doctoral thesis 2009
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Golubovic, M. (author)
Proteins are biological macromolecules, which are among the key components of all living organisms. Proteins are nowadays present in all fields of biotech industry, such as food and feed, synthetic and pharmaceutical industry. They are isolated from their natural sources or produced in different cell lines. Most important large-scale...
doctoral thesis 2009
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Rodriguez Pascual, M. (author)
One of the most important natural resources is fresh water. An unfortunate issue is however, the low availability and high demand of fresh water world-wide. From the total resources industry consumes about 20 % (1200 km3 yearly) [UN, 2007]. Industrial aqueous waste streams are therefore widely occurring, and their reuse becomes obligatory. For...
doctoral thesis 2009
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Van Rens, G.L.M.A. (author)
In this thesis the focus is on the particulate matter reduction of ships, as ships contribute significantly to the particulate matter concentration in ambient air. Because the fuel of sea ships contains a lot of ash, the emitted particulate matter will also contain a lot of ash. In car and truck applications the soot filters are cleaned by...
doctoral thesis 2008
Searched for: contributor:"Witkamp, G.J. (promotor)"
(1 - 20 of 45)

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