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van den Berg, L. (author)
A large part of the wastewater produced worldwide is discharged without any treatment. This has several negative consequences, including the spread of diseases and contamination of the environment. One method to treat wastewater is called aerobic granular sludge (AGS), an advanced, compact technology that uses granules. Granules are spherical...
doctoral thesis 2022
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Kleikamp, H.B.C. (author)
The large unexplored space of microbial biodiversity forms a well of untapped potential of enzymes and bioactive compounds. Genomic methods have made significant improvements over the past decades in their analysis of microbial communities. However, several aspects of nature can’t be described by a genome alone, such as expressed functions in...
doctoral thesis 2022
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Lip, K.Y.F. (author)
Saccharomyces yeasts are common workhorses for the production of alcoholic beverage and bio-ethanol. In these production processes, temperature is one of the predominant factors determining the operational costs of the industrial fermentation processes and the quality of the products (alcoholic beverage) because it influences the functioning of...
doctoral thesis 2022
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Cerruti, M. (author)
A transition to a circular economy is necessary to mitigate the negative effects on the environment of the exploitation and disposal of materials and to achieve society-wide benefits. The current produce-waste-dispose model is slowly changing toward a more sustainable produce-userecycle- upcycle model. In this context, bio-based processes using...
doctoral thesis 2022
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Pallares Vega, R. (author)
The rise of antibiotic resistant bacteria threatens the existing status quo of successful treatment of infectious diseases, leading to substantial personal and economic losses. Wastewater, carrying antibiotic resistant microorganisms from fecal origin, is an important route for disseminating anthropogenic-related resistant bacteria to natural...
doctoral thesis 2021
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Prot, T.J.F. (author)
Fertilizers are vital for our society since we use them to grow plants. These plants can produce fruits and vegetables that we can consume or use as feedstock for the animals, ending up in our plates. In short, we need fertilizers to make our food, and we are using an increasing quantity of it with the growing population. Phosphorus is an...
doctoral thesis 2021
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Soler Jofra, A. (author)
One of the least studied nitrogen compounds is hydroxylamine. Hydroxylamine<br/>is a highly reactive and toxic inorganic compound that some microorganisms use<br/>as intermediate during nitrogen conversions. The aim of this thesis was to further<br/>understand the role of hydroxylamine in the nitrogen cycle.
doctoral thesis 2021
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Jafari Eshlaghi, M. (author)
Membranes are widely applied in water and waste water treatment as they provide an absolute barrier against the contaminants. Membranes are offered in wide pore size range and they are applied vastly due to their versatile and cost effective operation in dealing with wide range of streams. However, membranes, like any other filtration systems,...
doctoral thesis 2021
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Stouten, G.R. (author)
Quickly, the show is about the start. Date: 3.5 thousand million years ago, location: planet Earth, event: life. Naturally, life is starting small, even microscopically tiny. Life in the form of microorganisms endures eons of time in which the world changes. They survived, failed, adapted, thrived, and they actually changed the world. They have...
doctoral thesis 2021
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Barrios Hernandez, M.L. (author)
This book describes pathogen removal processes in aerobic granular sludge (AGS) wastewater treatment systems. Faecal indicators (E. coli, Enterococci, coliforms and bacteriophages) were tracked in full-scale AGS facilities and compared to parallel activated sludge (CAS) systems. AGS showed similar removals as the more complex CAS configurations....
doctoral thesis 2021
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Pinel, I.S.M. (author)
Open recirculating cooling systems have been vital elements in industry since the early 20th century. Their purpose is to release excess heat from processes through water evaporation so that production can be carried out at optimal temperature. With the global development of industrial activities such as manufacturing, electricity and chemical...
doctoral thesis 2021
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Soares Rodrigues, C.I. (author)
In recent decades, there has been an increase demand for renewable sources of energy and chemicals in replacement of their fossil-based counterparts to tackle the economic, social, and environmental issues associated with the processing and use of petrochemicals by humanity. Sucrose has proven to be a suitable alternative feedstock to substitute...
doctoral thesis 2021
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Gabriel Guedes da Silva, L. (author)
Cells are complex systems continuously exposed to changing, dynamic environments. Understanding how cells respond and adapt is of great interest not only from a fundamental viewpoint but also for the development of solutions for current challenges in medical, industrial and environmental research fields.<br/><br/>In this thesis, the bacterial...
doctoral thesis 2021
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Mulders, M. (author)
Volatile fatty acids (VFA) may serve as building blocks for Polyhydroxyalkanoates (PHA) production and can be derived from waste streams. Ideal streams for PHA production contain a high Chemical Oxygen Demand (COD) to nutrient ratio, such as (waste)water from a paper-mill factory or candy-bar factory. The (waste)water generated by these...
doctoral thesis 2021
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Velasco Alvarez, M.I. (author)
A wide variety of microorganisms are increasingly being employed for the production of a broad diversity of compounds, instead of using fossil fuel. The production of such compounds faces different challenges for an optimized production. Identifying the bottlenecks in the synthesis of such products offers the possibility to reduce these...
doctoral thesis 2021
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Vasilakou, E. (author)
Dynamic environmental conditions govern microbial metabolism and affect cellular growth. Many applications in biotechnology require cultivating microorganisms in large-scale bioreactors. These environments are commonly characterized by physicochemical gradients, due to imperfect mixing and have been the cause of reduced...
doctoral thesis 2020
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Pfaff, N.M. (author)
Biofilms are the prevalent form of bacterial life on earth. Bacteria aggregate and embed themselves in a hydrogel matrix of extracellular polymeric substances (EPS), often spread over surfaces in thin films. The EPS matrix of biofilms is getting more and more attention from scientists for several reasons. On the one hand, it has been identified...
doctoral thesis 2020
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Boleij, M. (author)
In biofilms, microorganisms are embedded in a hydrated matrix that provides a stable structure and protection against influences fromthe environment. Thismatrix is formed by extracellular polymeric substances (EPS) that are produced by the microorganisms of the biofilm. A major part of the microorganisms in nature lives in aggregated forms like...
doctoral thesis 2020
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Valk, L.C. (author)
Over the past decade the demand for technology which can make our global economy more sustainable has increased exponentially. In the field of biotechnology, one of the many advancements is focussed on the conversion of agricultural waste streams towards commodity chemicals. Plant biomass can be an environmental and sustainable alternative for...
doctoral thesis 2020
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de Graaff, D.R. (author)
Increase in sea level will lead to an increase in salinity in domestic wastewater systems. In order to anticipate its effects on biological wastewater treatment, the impact has to be assessed with lab-scale experiments. Aerobic granular sludge (AGS) is a successful technology for simultaneous removal of organic carbon (COD), nitrogen, and...
doctoral thesis 2020
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